Y027013 1
1616879 A86033404
Measurement of ultrasonic wave velocities of tungsten carbide as a standard material under high pressures up to 8 GPa
Fujisawa, H.; Ho, E.
Earthquake Res. Inst., Tokyo Univ., Japan
Sponsor: Japan Soc. Appl. Phys.; Sci. Council Japan
Jpn. J. Appl. Phys. Suppl. (Japan) vol.24, suppl.24-1 103-15 1985 CODEN: JJPYA5
ISSN: 0021-4922
Proceedings of the 5th Symposium on Ultrasonic Electronics 4-6 Dec. 1984
Tokyo, Japan
Treatment: EXPERIMENTAL
Doc. Type: CONF. PAP.
Lang.: ENG. (3 Refs)
The purpose of the experiment is to measure the longitudinal wave velocity of a sintered tungsten carbide (WC) used as a standard material under pressures up to 8 GPa. The standard material is used to evaluate the effect of a transducer and a metal foil electrode on travel time measurement. It is also used to distinguish true signals, which are reflected from a sample end, from many ghost signals which arise from the acoustic boundaries in the sample-pressure medium assemblage.
Desc.: high-pressure effects in solids; high-pressure techniques; tungsten compounds; ultrasonic velocity; ultrasonic velocity measurement
Ident.: ultrasonic wave velocities standard material; high pressures; 8 GPa; longitudinal wave velocity; sintered; WC; travel time measurement; ghost signals
Class Codes: A6265; A6250; A4385; A0735

Y027013 2
1603807 A86021197
Mass flow measurement of gravity flow for high temperature dense phase solid gas two phase flow
Moriyama, T.; Matsuyama, T.
Denki Kagaku Kagyo KK, Tokyo, Japan
Trans. Soc. Instrum. & Control Eng. (Japan) vol.21, no.9 942-6 Sept. 1985 CODEN: TSICA9
ISSN: 0453-4654
Treatment: PRACTICAL
Doc. Type: JRNL PAP.
Lang.: Japanese (12 Refs)
Moved bed gravity flow of solids is required for coal gasifiers, metal ore direct reduction furnaces, gas phase coal liquifiers, etc. for energy conservation. Such a process is a high pressure and/or a high temperature process. The autors developed a new noise flow meter for the process. The measuring method is a nonintrusive method using simple lean noise sensors and a sensing technique without a sensing hole on the gravity flow pipe. The conclusion of the authors' test is that: noise pressure level at 8 kHz measured by C characteristics is suitable for mass flow contral without background noise calibration; space filtering of the signal or cross correlation of the signal is more suitable for the sensing technique; and the sensor and sensing technique is suitable for a solid particle velocity meter of a two phase transport pipe.
Desc.: flow measurement; fluidised beds; mass transfer; two-phase flo
Ident.: fluidised beds; flow measurement; mass transfer; gravity flow; high temperature dense phase solid gas two phase flow; noise flow meter; noise sensors; noise pressure level; C characteristics; mass flow control; space filtering; cross correlation; solid particle velocity meter
Class Codes: A4755K; A4755M; A4780

Y027013 3 
1602756 B86012684
Microphones in the boiler give early warning of tube leaks
Reason, J.
Power (USA) vol.19, no.7 62, 64 July 1985 CODEN: POWEAD
ISSN: 0032-5929
Treatment: PRACTICAL
Doc. Type: JRNL PAP.
Lang.: ENG.
Detection of boiler leaks by acoustic means is well established in England. In Italy, acoustic sensors also are used to detect leaks in high-pressure feedwater heaters.
Desc.: acoustic emission; boilers; high-pressure techniques; leak detection; microphones
Ident.: tube leaks; boiler; acoustic sensors; high-pressure feedwater heaters
Class Codes: B8230E; B7820

Y027013 4 
1589601 C86007286
Design of robust digital controllers for gas turbines with explicit actuator and sensor dynamics
Porter, B; Manganas, T.
Salford Univ., England
J. Guid. Control & Dyn. (USA) vol.8, no.5 644-9 Sept.-Oct. 1985 CODEN: JGCDDT
ISSN: 0731-5090
Treatment: THEORETICAL
Doc. Type: JRNL PAP.
Lang.: ENG. (7 Refs)
Multi-input multi-output dynamics systems such as gas turbines usually exhibit explicit actuator and sensor dynamics which are often ill defined. Singular perturbation methods are accordingly used to provide a basis for the design of discrete-time tracking systems incorporating fast-sampling error-actuated digital controllers for multivariable plants with such explicit actuator and sensor dynamics. These general results are illustrated by designing a robust digitl controller for the rotational speeds of the low- and high-pressure spools of a typical gas turbine.
Desc.: aerospace control; control system synthesis; controllers; digital control; discrete time systems; multivariable systems; perturbation techniques
Ident.: digital controllers; gas turbines; explicit actuator; sensor dynamics; perturbation methods; design; discrete-time tracking systems; fast-sampling; multivariable plants
Class Codes: C340D; C1310; C3360L; C1340B

Y027013 5 
1542184 A85099025, B85058938
Effects of thermal loading on pressure measurement in a combustion bomb
Kach, R.A.; Adamczyk, A.A.
Ford Motor Co., Dearborn, MI, USA
Rev. Sci. Instrumt (USA) vol.56, no.6 1274-8 June 1985 CODEN: RSINAK
ISSN: 0034-6748
U. S. Copyright Clearance Center Code: 0034-6748/85/061274-05$01.30
Treatment: EXPERIMENTAL
Doc. Type: JRNL PAP.
Lang.: ENG. (10 Refs)
The effects of thermal loading on the measurement of gas pressure during combustion and cool down of a constant volume reactor, 25 to >1000 ms, and the methods to reduce these effects were investigated. Four piezoelectri pressure transducers-a Kistler 6121, a Kistler 6123, a Kistler 603B, and an AVL 8QP500c-were tested with four levels of thermal protection: (1) no protection; (2) RTV placed on the front of the transducer; (3) the transducer placed behind a flame arrestor to prevent the flame from reaching the transducer with no RTV; and (4) the transducer behind a flame arrestor with RTV on the front. The results show that the application of RTV to the front of the transducers significantly reduces the differences between the pressure traces recorded by the Kistle 603B and traces recorded by the Kistler 6121, the Kistler 6123, or the AVL 8QP500c. However, the effect of RTV on reducing the differences made between the Kistler 6121, the Kistler 6123, and the AVL 8QP500c is minimal. Placing the transducers behind flame arrestors with 'good' gas exchange properties resulted in four indistinguishable pressure traces recorded by the four pressure pressure transducers.
Desc.: combustion; piezoelectric transducers; pressure measurement pressure transducers; protection
Ident.: thermal loading; pressure measurement; combustion bomb; constant volume reactor; piezoelectric pressure transducers; Kistler 6121; Kistler 6123; Kistler 603B; AVL 8QP500c; thermal protection; RTV; flame arrestor; gas exchange properties
Class Codes: A0670M; A0630; A8240P; B7320V; B7230; B2860

Y027013 6 
1542166 B85059531
Megasonic particle removal from solid-state wafers
Shwartzman, S.; Mayer, A.; Kern, W.
RCA Solid State Technol. Center, Somerville, NJ, USA
RCA Rev. (USA) Vol.46, no.1 81-105 March 1985 CODEN: RCARCI
ISSN: 0033-6831
Treatment: PRACTICAL
Doc. Type: JRNL PAP.
Lang.: ENG. (45 Refs)
A noncontact electronic cleaning system is described for the removal of micron-size and smaller particles from silicon wafers used in the fabrication of solid-state device. The apparatus consists of a tank with a suitable cleaning liquid and one or several transducers operating in the high frequency ultrasonic range of 850 to 900 kHz (hence the term 'megasonic'). Unlike ultrasonic scrubbing, the cleaning action results from high-pressure waves set up in the solution, rather than from the implosion of bubbles that are generated by ultrasonic cavitation. For silicon substrate and device wafers, solutions based on hydrogen peroxide mixtures are used that effect the simultaneous desorption of organic and inorganic contaminants from the surfaces, even tough the temperature does not normally exceed 40 degrees C. This low processing temperature greatly reduces the rate of hydrogen peroxide decomposition, resulting in substantially reduced consumption of chemicals.
Desc.: semiconductor technology; surface treatment; ultrasonic applications
Ident.: Si wafers; megasonic particle removal; micron size particles ; H/sub 2/O/sub 2/ solutions; organic contaminants; solid-state wafers noncontact electronic cleaning system; transducers; high-frequency ultrasonic range; 850 to 900 kHz; high-pressure waves; desorption; inorganic contaminants; low processing temperature
Class Codes: B7820; B2550

Y027013 7 
1518413 A85093137
Sensitivity of the Contra-Flow leak detector at high test pressures
Hablanian, M.H.
Varian Associates Inc., Lexington, MA, USA
Vacuum (GB) vol.35, no.3 119-23 March 1985 CODEN: VACUAV
ISSN: 0042-207X
USCCC Code: 0042-207X/85$3.00+.00
Treatment: PRACTICAL
Doc. Type: JRNL PAP.
Lang.: ENG. (5 Refs)
The Contra-Flow leak detection technique consists of letting the tracer gas (helium) diffuse upstream through the high vacuum pump toward the mass spectrometer sensor. The test object can remain at relatively high total pressure, as high as the tolerable forepressure of the high vacuum pump. Because this environment is not in the molecular flow regime, the relationship of detection sensitivity to pump performance parameters is sufficiently different from those of conventional leak detectors to warrant an investigation. Comparative tests were made with both types of detectors over a wide range of test pressures using water vapour, air, nitrogen and argon to simulate various test object pressure conditions. The results reveal that at test pressures above approximately one pascal the Contra-Flow method provides at least ten times higher sensitivity. Exposure of the test object to mechanical pump oil vapour can be prevented by a continuous stream of helium-free gas or by the use of zeolite traps. The latter do not absorb helium significantly but produce a great effect on the residual gas composition.
Desc.: high-pressure techniques; leak detection; mass spectrometer components and accessories
Ident.: sensitivity; He; N/sub 2/; Ar; Contra-Flow leak detector; high test pressures; tracer gas; mass spectrometer sensor; high vacuum pump ; pump performance parameters; water vapour; air; mechanical pump oil vapour; zeolite traps; residual gas composition
Class Codes: A0730G; A0775; A0735

Y027013 8 
151590 A85092468, B85048461
Deep-ocean piezometer probe technology for geotechnical investigations
Bennett, R.H.; Burns, J.T.; Nastav, F.L.; Lipkin, J.; Percival, C.M.
Seafloor Geosci. Div., NSTL, MS, USA
IEEE J. Oceanic Eng. (USA) vol.OE-10, no.1 17-22 Jan. 1985 CODEN: IJOEDY
ISSN: 0364-9059
USCCC Code: 0364-9059/85/0100-0017$01.00
Treatment: NEW DEVELOPMENTS; PRACTICAL
Doc. Type: JRNL PAP.
Lang.: ENG. (14 Refs)
Two single-sensor piezometer probes, 8 mm in diameter, were developed for deep-ocean geotechnical investigation. These probes were tested in a hyperbaric chamber pressurized to 55 MPa (8000 psi). Testing was performed for a period of five weeks under high hydrostatic pressure with the probes inserted in reconstituted illitic marine sediment. Small differential pore-water pressures were generated in response to both mechanically and thermally generated forcing functions. During deep-ocean simulated pressure tests, the sensors exhibited excellent sensitivity and stability. These developments in piezometer-probe technology are seen as providing a quantitative means of assessing important geotechnical parameters of fine-grained seabed deposits.
Desc.: geophysical equipment; geophysical techniques; high-pressure techniques; piezoelectric devices; pressure measurement; pressure transducers; sediments
Ident.: pore pressure instrumentation; measurement; technique; marine geology; piezometer probe technology; single-sensor; deep-ocean; illitic marine sediment; fine-grained seabed deposits
Class Codes: A9385; A0670D; A0735; A9220; A9150; A9150E; B7710; B7230; B7320V

Y027013 9 
1506464 A85083488, B8504811
Multichannel time-interval meter (crack propagation detection)
Lebedev, V.K.; Vishnyakov, A.P.; Gaznyuk, Yu.S.; Kot, V.G.
Izmer. Tekh. (USSR) vol.27, no.3 45-6 March 1984 CODEN: IZTEAW
ISSN: 0021-3349
Trans in: Me?s. Tech. (USA) vol.27, no.3 253-4 March 1984 CODEN: MSTCAL
ISSN: 0543-1972
USCCC Code: 0543-1972/84/2703-0253$08.50
Treatment: PRACTICAL
Doc. Type: JRNL PAP.
Lang.: ENG. (7 Refs)
In pneumatic tests of welded structures (pipes and high-pressure vessels), it is important to know the failure rate, i.e. to measure the rate of crack propagation (RCP). The RCP meter described uses filling of the time interval between the signals from two adjacent transducers with pulses of known frequency. The transducers are placed at equal distances on either side of the crack, which is propagated in two directions (to the right and to the left) from the center along the generating line of the pipe.
Desc.: crack detection; high-pressure techniques; pressure vessels testing; time measurement
Ident.: multichannel time interval meter; pneumatic tests; welded structures; pipes; high-pressure vessels; rate of crack propagation
Class Codes: A0630F; A07??; A8170C; B7320K; B0590

Y027013 10 
1506291 B85047924, C85036213
A wide range of semiconductor sensors (from Honeywell)
Hencke, H.
Elektronik (Germany) vol.34, no.10 80-4 17 May 1985 CODEN: EKRKAR
ISSN: 0013-5?58
Treatment: PRACTICAL; PRODUCT REVIEW
Doc. Type: JRNL PAP.
Lang.: German (7 Refs)
Technical, performance and application details of several kinds of Honeywell semiconductor sensors are summarised. Piezoelectric pressure sensors embody bridge-form piezoresistive elements on a silicon membrane. Hall effect sensors include digital types with TTL/CMOS-compatible outputs. Permalloy current sensors contain magnetically sensitive resistors on a silicon chip. Ultrasonic sensors measure distances up to 2000 mm with 30 Hz pulsed 215 kHz sound. Miniature photoelectric sensors operate from red or infrared LED light sources. Inductive proximity sensors measure up to 10 mm separation by eddy current methods. Thermoresistive sensors contain a photochemically etched thin film resistor network on a temperature sensitive chip.
Desc.: electric sensing devices; semiconductor devides; transducers
Ident.: piezoelectric pressure sensors; Si membrane; digital sensors ; Si chip; ultrasonic sensors; miniature photoelectric sensors; inductive proximity sensors; thermoresistive sensors; Honeywell semiconductor sensors ; bridge-form piezoresistive elements; Hall effect sensors; TTL/CMOS-compatible outputs; Permalloy current sensors; magnetically sensitive resistors; 2000 mm; 30 Hz pulsed 215 kHz sound; 10 mm separation eddy current methods; photochemically etched thin film resistor network; temperature sensitive chip
Class Codes: B7230; B2560; C3240D

Y027013 11 
1504675 A85080070, B85046167
Fiber optic sensors: an overview
Davis, C.M.
Opt. Technol. Inc., McLean, VA, USA
Opt. Eng. (USA) vol.24, no.2 347-51 March-April 1985 CODEN: OPEGAR
ISSN: 0091-3286
Treatment: GENERAL, REVIEW
Doc. Type: JRNL PAP.
Lang.: ENG. (13 Refs)
Fiber optic sensor technology is explained in terms of theory and applications. Various components common to all fiber optic sensors are compared. Two classes of sensing devices are emphasized: amplitude-modulated sensors and phase-modulated sensors. Specific examples of amplitude modulated devices-one a pressure sensor using an optical reflection technique and another an accelerometer using a microbend technique-are described. Four types of fiber optic interferometers used in a phase-modulated sensors are discussed. The effect of the optical fiber jack on the sensitivity of phase-modulated sensors is considered. A miniature pressure sensor and a highly sensitive fiber optic accelerometer, both employing phase modulation, are described.
Desc.: accelerometers; amplitude modulation; fibre optic sensors; light interferometers; optical modulation; phase modulation; pressure transducers; reviews
Ident.: fiber optic sensors; amplitude-modulated sensors; phase-modulated sensors; pressure sensor; optical reflection technique; accelerometer; microbend technique; fiber optic interferometers; optical fiber jack; sensitivity
Class Codes: A4280M; A0130R; A0760L; B4130; B7230

Y027013 12 
1477838 A85070917
A small pressurized vessel for measuring the acoustic properties of materials
Hagelberg, M.P.; Corsaro, R.D.
Wittenberg Univ., Springfield, OH, USA
J. Acoust. Soc. Am. (USA) vol.77, no.3 1222-8 March 1985 CODEN: JASMAN
ISSN: 0001-4966
Treatment: PRACTICAL; EXPERIMENTAL
Doc. Type: JRNL PAP.
Lang.: ENG. (4 Refs)
A laboratory system is described that measures the acoustic properties of materials in the frequency range from 10-100 kHz, at pressures to 150 psi (1000 kPa), and from 0 degrees -40 degrees C. By using transducer arrays and broadband pulses together with digital data acquisition and analysis techniques it is possible to contain this (essentially) free-field system in a vessel with a volume of only 0.42 m/sup 3/. The system provides measurements of complex reflection and transmission coefficients as a continuous function of frequency. From the data one can obtain the following material parameters: sound speed, frequency-dependent sound attenuation coefficient, complex acoustic impedance, echo reduction, and insertion loss. Results are presented for a variety of samples to illustrate the capability of this system.
Desc.: acoustic equipment; high-pressure techniques; pressure vessels
Ident.: 10 to 100 kHz; high pressure; pressurized vessel; acoustic properties; materials; 1000 kPa; transducer arrays; broadband pulses; digital data acquisition; free-field system; sound speed; frequency-dependent sound attenuation coefficient; complex acoustic impedance; echo reduction; insertion loss
Class Codes: A4385; A0735

Y027013 13 
1474437 A85058364, B85037560
A fast-response high-temperature high-pressure surface thermocouple
Charles, E.; Lorival, R.; Boyer, A.; Malbrunot, P.
Lab. de Phys. Appl., Univ. des Sci. et Tech. du Languedoc, Montpellier, France
Sens. & Actuators (Switzerland) vol.6, no.2 135-4 Oct. 1984 CODEN: SEACDX
ISSN: 0250-6874
USCCC Code: 0250-6874/84/$3.00
Treatment: EXPERIMENTAL
Doc. Type: JRNL PAP.
Lang.: ENG. (10 Refs)
The active portion of this transducer consists of a classical thermocouple made up of two thin wires (W5Re and W26Re) embedded in fused alumina. The electrical contact at the hot junction is provided by a thin film of molybdenum. The measured response (1 ms or less) obtained under dynamic conditions of temperature and pressure (explosion) is in agreement with the values calculated by a computer simulation.
Desc.: high-pressure techniques; high-temperature techniques; thermocouples
Identifiers: high-temperature high-pressure surface thermocouple; thin wires; W5Re; W26Re; fused alumina; dynamic conditions; computer simulation
Class Codes: A0670M; A0720K; A0735; B7230; B7320R

Y027013 14 
1472470 A85059726, B8535418
Microshell-tipped optical fibers as sensors of high-pressure pulses in adverse environments
Benjami, R.F.; Mayer, F.J.; Maynard, R.L.
Dynamic Testing Div., Los Alamos Nat. Lab., NM, USA
Sponsor: SPIE
Proc. SPIE Int. Soc. Opt. Eng. (USA) vol.506 116-21 1984 CODEN: PSISDG
ISSN: 0277-786X
Fiber Optics in Adverse Environments II 22-24 Aug. 1984 San Diego, CA, USA
Treatment: APPLIC; PRACTICAL; EXPERIMENTAL
Doc. Type: CONF. PAP.
Lang.: ENG. (7 Refs)
The authors developed and used an optical-fiber sensor for detecting the arrival of strong pressure pulses. The sensor consists of an optical fiber, tipped with a gas-filled microballoon. They have been used successfully in adverse environments including explosives, ballistics and electromagnetic pulses (EMP). The sensor produces a bright optical pulse caused by the rapid shock-heating of a gas, typically argon or xenon, which is confined in the spherical glass or plastic microballoon. The light pulse is transmitted via the optical fiber to a photodetector, usually a streak camera or photomultiplier tube. The microballon optical sensor (called an optical 'pin' by analogy to standard electrical 'pins'), was originally developed for diagnosing an explosive, pulsed-power generator. Optical pins are required due to the EMP. The optical pins are economical arrival-time indicators because many channels can be recorded by one streak camera. The generator tests and related experiments, involving projectile velocities and detonation velocities of several kilometers per sec have demonstrated the usefulness of the sensors in explosives and ballistics applications. The authors have also measured the sensitivity of the optical pins to slowly-moving projectiles and found that a 200 m/sec projectile impacting the microballoon sensor produces a flash having a risetime less than 100 ns and a pulse duration (FWHM) of less than 300 ns. The technical and cost advantages of this optical pin make it potentially useful for many electromagnetic, explosive, and ballistics applications.
Desc.: ballistics; electromagnetic pulse; explosions; fibre optic sensors; photodetectors; pressure measurement; streak photography
Ident.: microshell tipped optical fibres; Ar; Xe; high pressure pulse sensors; optical pin; explosive pulsed power generator; adverse environments; strong pressure pulses; gas-filled microballoon; explosives; ballistics; electromagnetic pulses; EMP; optical pulse; rapid shock-heating ; optical fiber; photodetector; streak camera; photomultiplier tube; microballoon optical sensor; arrival-time indicators; projectile velocities ; detonation velocities; ballistics applications; sensitivity; slowly-moving projectiles
Class Codes: A4280M; A0630; A0762; A0768; A0765; B4130; B7230; B7320V; B5230

Y027013 15 
1455592 B85031445, C85022775
CERAMIC DIAPHRAGM TRANSDUCER OFFERS CONTROL UP TO 3000 LB/IN/SUB 2/DES. ENG.B) 145, 149 SEPT. 1984 CODEN: DEMCBS
ISSN: 0308-8448
Treatment: APPLIC
Doc. Type: JRNL PAP.
Lang.: ENG.
A NEW CONCEPT IN PRESSURE TRANSDUCER MANUFACTURING, BASED UPON ORIGINAL WORK DONE BY FIAT IN THE AUTOMOTIVE FIELD, HAS ENABLED THE FRENCH COMPANY J.P.B. TO OFFER A HIGH PERFORMANCE PRESSURE TRANSDUCER AT 60PERCENT OF THE PRICE OF CONVENTIONAL PRODUCTS.
Desc.: THICK FILM DEVICES; CERAMICS; DIAPHRAGMS; PRESSURE TRANSDUCERS; HIGH-PRESSURE TECHNIQUES; STRAIN GAUGES
Ident.: CERAMIC DIAPHRAGM TRANSDUCER; THICK-FILM SCREEN PRINTING; STRAIN GAUGE BRIDGE; 3000 LB/IN/SUP 2/; PRESSURE TRANSDUCER MANUFACTURING; PERFORMANCE; PRICE
Class Codes: B7230; B7320V; B0540; B2220G; C3240D; C3120R

Y027013 16 
1454025 A85053766, B85029771
SINGLE-MODE FREQUENCY TUNING OF A HIGH-PRESSURE PHOTOPREIONIZED CO/SUB 2/-LASER
KNYAZEV, I.N.; SARKISIAN, A.A.
INST. OF SPECTROSCOPY, ACAD. OF SCI., MOSCOW, USSR
OPT. COMMUN. (NETHERLANDS) VOL.52, NO.6 421-4 15 JAN. 1985 CODEN: OPCOB8
ISSN: 0030-4018
USCCC Code: 0030-4018/85/$03.30
Treatment: THEORETICAL; EXPERIMENTAL
Doc. Type: JRNL PAP.
Lang.: ENG. (13 Refs)
SINGLE-MODE FREQUENCY TUNING OF A PULSED HIGH-PRESSURE PHOTOPREIONIZED CO/SUB 2/-LASER WITH LASER LINEWIDTH >1*10/SUP -3/ CM/SUP -1/ AND PEAK POWER UP TO 10 SUP 5/ W IS REPORTED. TWO REGIMES OF SYNCHRONOUS FREQUENCY SCANNING OF THE RESONATOR MODE BY A PIEZOCERAMIC TRANSDUCER AND MODE-SELECTING ETALON BY CORRESPONDING ANGLE TILTING ARE CARRIED OUT IN THE SPECTRAL INTERVAL COVERING THE FREE SPECTRAL RANGE OF THE USED ETALONS. CONTOURS OF ISOLATED LINES AND HIGH-RESOLUTION ABSORPTION SPECTRA OF ETHYLENE ARE PRESENTED.
Desc.: CARBON COMPOUNDS; GAS LASERS; LASER MODES; LASER TUNING; LIGHT INTERFEROMETERS; ORGANIC COMPOUNDS; INFRARED SPECTRA OF ORGANIC MOLECULES AND SUBSTANCES; SPECTROSCOPIC LIGHT SOURCES; LASER BEAM APPLICATIONS
Ident.: SINGLE-MODE FREQUENCY TUNING; ISOLATED LINE CONTOURS; HIGH-PRESSURE PHOTOPREIONIZED CO/SUB 2/-LASER; PULSED; LINEWIDTH; PEAK POWER; SYNCHRONOUS FREQUENCY SCANNING; RESONATOR MODE; PIEZOCERAMIC TRANSDUCER; MODE-SELECTING ETALON; ANGLE TILTING; SPECTRAL INTERVAL; FREE SPECTRAL RANGE; HIGH-RESOLUTION ABSORPTION SPECTRA; ETHYLENE
Class Codes: A4255D; A4260B; A4260K; A3320E; B4320C; B4360

Y027013 17 
1439313 A85046606
HIGH PRESSURE SENSOR FOR LOW TEMPERATURE USE
FABRE, D.; THIERY, M.M.
LAB. DES INTERACTIONS MOLECULAIRES ET DES HAUTES PRESSIONS, UNIV. DE PARIS-NORD, VILLETANEUSE, FRANCE
REV. PHYS. APPL. (FRANCE) VOL.20, NO.1 45-7 JAN. 1985 CODEN: RPHAAN
ISSN: 0035-1687
Treatment: EXPERIMENTAL
Doc. Type: JRNL PAP.
Lang.: ENG. (8 Refs)
THE FLUORESCENCE OF A TITANIUM DOPED SAPPHIRE CRYSTAL IS USED IN LOW TEMPERATURE EXPERIMENTS AS A PRESSURE SENSOR UP TO 13 KBAR. WITH INCREASING PRESSURE, THE TWO ZERO PIONON LINES OF THE TI/SUP 3+/ ION SHOWN A LINEAR BLUE SHIFT IN THE INVESTIGATED PRESSURE RANGE. DETAILS OF THE CALIBRATION MEASUREMENTS AT 4.2K AND 77K ARE PRESENTED. THE PRESSURE COEFFICIENTS FOR THE TWO LINES ARE RESPECTIVELY 7.9 AND 7.8 +OR- 0.3 CM/SUP -1/ KBAR/SUP -1/ AT 4K AND 8.5 AND 8.4 +OR- 0.2 CM/SUP -1/ KBAR/SUP -1/ AT 77K.
Desc.: SAPPHIRE; TITANIUM; PRESSURE MEASUREMENT; HIGH-PRESSURE TECHNIQUES
Ident.: SAPPHIRE: TI; FLUORESCENCE; LOW TEMPERATURE EXPERIMENTS; PRESSURE SENSOR; 13 KBAR; TI/SUP 3+/ ION; LINEAR BLUE SHIFT
Class Codes: A0735

Y027013 18 
1437656 B85026339
OPTICAL REFLECTION SENSORS USED IN THE CHEMICAL INDUSTRY
RAAB, H.
BASF AG, LUDWIGSHAFEN, GERMANY
PROCESS AUTOM. (GERMANY) 47-51 1984 CODEN: PPAUDT
ISSN: 0172-2611
Treatment: PRACTICAL 
Doc. Type: JRNL PAP.
Lang.: ENG. (4 Refs)
THE OPTICAL SENSORS, DEVELOPED USING THE FUNCTION OF THE REFLECTION OF LIGHT (IN PARTICULAR TOTAL REFLECTION), SATISFY THE DEMANDS MADE IN THE CHEMICAL INDUSTRY FOR IN-LINE MEASUREMENTS. THIS HAS BEEN ACHIEVED USING OPTICAL FIBERS, LEDS AND SEMICONDUCTOR RECEIVERS AND SIGNAL PROCESSING ELECTRONICS WHICH ARE REMOTE FROM THE SENSOR. THE SEMICONDUCTOR RECEIVERS ARE PROTECTED AGAINST ENVIRONMENTAL INFLUENCES BY A SUITABLE ENCLOSURE. EXAMPLES ARE PRESENTED OF SUCH SENSORS FOR MONITORING THE FLOW OF GRANULAR MATERIAL, DETECTION OF FILTER RUPTURES, DETERMINATION OF LOW TURBIDITIES AND LEVEL MEASUREMENTS USING HIGH-PRESSURE SIGHT GASSES.
Desc.: CHEMICAL INDUSTRY; PHOTODETECTORS; FLOW MEASUREMENT; LEVEL MEASUREMENT; TURBIDIMETRY; FIBRE OPTIC SENSORS
Ident.: OPTICAL SENSOR; FLOW MEASUREMENT; RUPTURE DETECTION; TURBIDITY MEASUREMENT; CHEMICAL INDUSTRY; OPTICAL SENSORS; TOTAL REFLECTION ; OPTICAL FIBERS; LED; SIGNAL PROCESSING ELECTRONICS; SEMICONDUCTOR RECEIVERS; LEVEL MEASUREMENTS
Class Codes: B7230C; B7320W

Y027013 19 
1437634 B85026312
APPLICATIONS OF PIEZOELECTRIC MEASURING TRANSDUCERS
KAIL, R.; MAHR, W.
MESS. AND PRUEF. (GERMANY) VOL.20, NO.7-8 380-4 JULY-AUG. 1984 CODEN: MSPNBZ
ISSN: 0026-0339
Treatment: APPLIC; PRACTICAL
Doc. Type: JRNL PAP.
Lang.: GERMAN
DESCRIBES THE PHYSICAL PRINCIPLES OF QUARTZ PRESSURE AND DISPLACEMENT TRANSDUCERS, REFER TO CHARGE SENSITIVITY, AND ILLUSTRATES DESIGN OF HIGH PRESSURE TRANSDUCERS AND ACCELEROMETERS. PROBLEMS OF HIGH TEMPERATURE MEASUREMENTS ARE NOTED, AND A WIDE RANGE OF APPLICATIONS IS DISCUSSED.
Desc.: PIEZOELECTRIC TRANSDUCERS; ACCELEROMETERS; PRESSURE TRANSDUCERS; CRYSTAL RESONATORS; TEMPERATURE MEASUREMENT; CHARGE MEASUREMENT; DISPLACEMENT MEASUREMENT
Ident.: QUARTZ TRANSDUCER; PIEZOELECTRIC MEASURING TRANSDUCERS; DISPLACEMENT TRANSDUCERS; CHARGE SENSITIVITY; HIGH PRESSURE TRANSDUCERS; ACCELEROMETERS; HIGH TEMPERATURE MEASUREMENTS
Class Codes: B7230; B7320E; B7320C; B2860; B7320R; B7320V; B7310Z

Y027013 20 
1426942 A85041240
POLYCRYSTALLINE CUBIC BORON NITRIDE CHAMBER FOR MOSSBAUER STUDIES TO 200 KBAR
KAPITANOV, E.V.; YAKOVLEV, E.N.
INST. OF HIGH PRESSURE PHYS., ACAD OF SCI., TROITSK, USSR
ZH. TEKH. FIZ. (USSR) VOL.54, NO.6 1115-27 JUNE 1984 CODEN: ZEFA3
ISSN: 0044-4642
Trans in: SOV. PHYS.-TECH. PHYS. (USA) VOL.29, NO.6 633-41 JUNE 1984 CODEN: SPTPA3
ISSN: 0038-5662
USCCC Code: 0038-5662/84/060633-09$03.40
Treatment: EXPERIMENTAL
Doc. Type: JRNL PAP.
Lang.: ENG. (58 Refs)
A PRESSURE CHAMBER IS DESCRIBED FOR MOSSBAUER STUDIES OF SAMPLES OF AREA 1 MM/SUP 2/. THE STRUCTURAL MATERIAL IN THE CHAMBER CONSISTS OF WEAKLY ABSORBING, MECHANICALLY STRONG CUBIC BORON NITRIDE POLYCRYSTALS, WHICH PERMITS EXPERIMENTS UP TO 200 KBAR WITH A CONSTANT SOLID ANGLE. A MANGANIN SENSOR CONTINUOUSLY MONITORS THE PRESSURE NEAR THE SAMPLE (ABSORBER). THE CHAMBER WAS USED FOR MOSSBAUER STUDIES OF TIN.
Desc.: MOSSBAUER EFFECT; SPECTROMETER COMPONENTS AND ACCESSORIES; BORON COMPOUNDS; HIGH PRESSURE TECHNIQUES
Ident.: BN; MOSSBAUER STUDIES; PRESSURE CHAMBER; STRUCTURAL MATERIAL ; SOLID ANGLE; MANGANIN SENSOR
Class Codes: A0785; A7680; A0735

Y027013 21
1422108 A85036217
A NOVEL OPTICAL PIN USING MICROBALLONS
BENJAMIN, R.F.
DIV. OF DYNAMIC TESTING, LOS ALAMOS NAT. LAB., NM, USA
HOMAN, C.; MACCRONE, R.K.; WHALLEY, E. (Editors)
Sponsor: INT. ASSOC. ADV. HIGH PRESSURE SCI. AND TECHNOL.; MATER. RES. SOC
HIGH PRESSURE IN SCIENCE AND TECHNOLOGY. PROCEEDINGS OF THE 9TH AIRAPT INTERNATIONAL HIGH PRESSURE CONFERENCE 299-300 PT.3 1984
24-29 JULY 1983 ALBANY, NY, USA
Publ: NORTH-HOLLAND, NEW YORK, USA
3 VOL. (XV+373+XIII+335+XV+397) pp. ISBN 0444 00932 9
Treatment: APPLIC; PRACTICAL; EXPERIMENTAL
Doc. Type: CONF. PAP.
Lang.: ENG. (6 Refs)
THE AUTHORS DESCRIBE THE DESIGN, FABRICATION AND APPLICATION OF AN OPTICAL PROBE FOR DETECTING A SHOCK FRONT OR MOVING SURFACE. THE PROBE IS A GAS-FILLED MICROBALLOON AFFIXED TO AN OPTICAL FIBER. THE PROBE HAS SIGNIFICANT TECHNICAL AND ECONOMIC ADVANTAGES OVER OTHER METHODS.
Desc.: HIGH-PRESSURE TECHNIQUES; PRESSURE MEASUREMENT; FIBRE OPTIC SENSORS
Ident.: HIGH PRESSURE EVENTS; GAS FILLED MICROBALLOON; OPTICAL PIN; MICROBALLONS; DESIGN; FABRICATION; OPTICAL PROBE; SHOCK FRONT; MOVING SURFACE; GAS-FILLED MICROBALLOON; OPTICAL FIBER
Class Codes: A07?5; A4280M; A0670D

Y027013 22
1422107 A85036216, B85020616
METROLOGICAL CHARACTERIZATION OF MANGANIN GAGES CALIBRATED AGAINST THE MERCURY MELTING LINE
MOLINAR, G.; BIANCHI, L.
ISTITUTO DI METROLOGIA G. COLONNETTI, TORINO, ITALY
HOMAN, C.; MACCRONE, R.K.; WHALLEY, E. (Editors)
Sponsor: INT. ASSOC. ADV. HIGH PRESSURE SCI. AND TECHNOL.; MATER. RES. SOC
HIGH PRESSURE IN SCIENCE AND TECHNOLOGY. PROCEEDINGS OF THE 9TH AIRAPT INTERNATIONAL HIGH PRESSURE CONFERENCE 285-8 PT.3 1984
24-29 JULY 1983 ALBANY, NY, USA
Publ: NORTH-HOLLAND, NEW YORK, US
3 VOL. (XV+373+XIII+335+XV+397) pp. ISBN 0 444 00932 9
Treatment: EXPERIMENTAL
Doc. Type: CONF. PAP.
Lang.: ENG. (5 Refs)
ONE OF THE PRESENT PROBLEMS OF HIGH PRESSURE METROLOGY IS THE SELECTION OF A TRANSFER STANDARD FOR MEASUREMENTS FROM 0.1 GPA TO SEVERAL GIGAPASCAL. THIS TRANSFER STANDARD MUST BE EASY TO EMPLOY AND HAVE HIGH RELIABILITY AND STABILITY TO MAKE IT SUITABLE TO BE USED IN INTERNATIONAL COMPARISONS. WITHIN A WIDE SELECTION OF HIGH PRESSURE TRANSDUCERS, MANGANIN GAGES ARE THOSE MOST USED, AND THEIR METROLOGICAL CHARACTERISTICS HAVE BEEN STUDIED BY MANY AUTHORS. THE FIRST OBJECTIVE OF THIS PAPER IS TO PRESENT THE RESULTS OF THE METROLOGICAL CHARACTERIZATION OF TWO MANGANIN GAGES, WHILE FOCUSING IN PARTICULAR ON THE ASPECT OF THE STABILITY OF THEIR ELECTRICAL RESISTANCE AT ATMOSPHERIC PRESSURE OVER A TWO-YEAR PERIOD. THE SECOND OBJECTIVE IS TO ESTABLISH THE LIMITS WITHIN WHICH THE MERCURY MELTING LINE (MML) CAN BE USED TO CALIBRATE MANGANIN GAGES. AT IMGC BOTH PISTON GAGES AND THE MML ARE USED FOR CALIBRATION PURPOSES UP TO 1.4 GPA. THE COMPARISON OF THE RESULTS OF GAGE CALIBRATION BY THE MML AT DIFFERENT PRESSURE POINTS AGAINST THE RESULTS OF THE CALIBRATION OF THE SAME TRANSDUCERS BY PISTON GAGE IS A MEANS THROUGH WHICH THIS OBJECTIVE CAN BE ATTAINED.
Desc.: PRESSURE TRANSDUCERS; MEASUREMENT STANDARDS 
Ident.: METROLOGICAL CHARACTERISATION; MANGANIN GAUGES; HG MELTING LINE; HIGH PRESSURE METROLOGY; TRANSFER STANDARD; HIGH PRESSURE TRANSDUCERS ; STABILITY; ELECTRICAL RESISTANCE; CALIBRATE
Class Codes: A0735; A0620H; A0670M; B7230; B7320V

Y027013 23
1422089 A85036194, B85020617
MANGANIN AND ZERANIN PRESSURE TRANSDUCERS FOR 20 KBAR
BILKS, A.W.; LUDLOW, C.G.
DEPT. OF MECH. AND IND. ENG.UEEN'S UNIV., BELFAST, N IRELAND
HOMAN, C.; MACCRONE, R.K.; WHALLEY, E. (Editors)
Sponsor: INT. ASSOC. ADV. HIGH PRESSURE SCI. AND TECHNOL.; MATER. RES. SOC
HIGH PRESSURE IN SCIENCE AND TECHNOLOGY. PROCEEDINGS OF THE 9TH AIRAPT INTERNATIONAL HIGH PRESSURE CONFERENCE 311-14 T?.3 1984
24-29 JULY 1983 ALBANY, NY, USA
Publ: NORTH-HOLLAND, NEW YORK, USA
3 VOL. (XV+373+XIII+33?+XV+397) pp. ISBN 0 444 00932 9
Treatment: NEW DEVELOPMENTS; PRACTICAL
Doc. Type: CONF. PAP.
Lang.: ENG.
A HIGH PRESSURE (2.0 GPA) GAS SYSTEM EXISTS IN THE DEPARTMENT OF MECHANICAL AND INDUSTRIAL ENGINEERING, QUEEN'S UNIVERSITY, AND A MANGANIN WIRE PRESSURE TRANSDUCER HAS BEEN DESIGNED AND USED IN THIS SYSTEM. THE USE OF ZERANIN WIRE AS AN ALTERNATIVE HAS BEEN INVESTIGATED.
Desc.: PRESSURE TRANSDUCERS; PRESSURE TRANSDUCERS
Ident.: PRESSURE TRANSDUCERS; FOR 20 KBAR; HIGH PRESSURE; MANGANIN WIRE; ZERANIN WIRE
Class Codes: A0670M; A0735; B7230; B7320V

Y027013 24
1420525 A85030440, B85020615
TWO-PARAMETER SEMICONDUCTOR TRANSDUCER FOR MEASURING HIGH-PRESSURE AND TEMPERATURE
WLODARSKI, W.
WARSAW TECH. UNIV., POLAND
HOMAN, C.; MACCRONE, R.K.; WHALLEY, E. (Editors)
Sponsor: INT. ASSOC. ADV. HIGH PRESSURE SCI. AND TECHNOL.; MATER. RES. SOC
HIGH PRESSURE IN SCIENCE AND TECHNOLOGY. PROCEEDINGS OF THE 9TH AIRAPT INTERNATIONAL HIGH PRESSURE CONFERENCE 257-60 PT.2 1984
24-29 JULY 1983 ALBANY, NY, USA
Publ: NORTH-HOLLAND, NEW YORK, USA
3 VOL. (XV+373+XIII+335+XV+397) pp. ISBN 0 444 0093 9
Treatment: NEW DEVELOPMENTS; PRACTICAL; EXPERIMENTAL
Doc. Type: CONF. PAP.
Lang.: ENG. (1 Refs)
PRESENTS THE RESULTS OF STUDIES ON THE APPLICATION OF SEMICONDUCTOR P-N JUNCTIONS AS TWO-PARAMETER TRANSDUCERS OF HIGH-HYDROSTATIC PRESSURE AND OF TEMPERATURE IN THE AREA OF THE PRESSURE. A BLOCK DIAGRAM OF AN ELECTRONIC CIRCUIT INTENDED TO COLLABORATE WITH A TWO-PARAMETER TRANSDUCER IS GIVEN.
Desc.: HIGH-PRESSURE TECHNIQUES; PRESSURE MEASUREMENT; PRESSURE TRANSDUCERS; TEMPERATURE MEASUREMENT; SEMICONDUCTOR DIODES
Ident.: TEMPERATURE MEASUREMENT; HIGH-PRESSURE; SEMICONDUCTOR P-N JUNCTIONS; TWO-PARAMETER TRANSDUCERS; ELECTRONIC CIRCUIT
Class Codes: A0735; A0630; A0720D; A0670M; B7230; B2560H; B7320R; B7320V

Y027013 25
1420516 B85020606
SILICON PRESSURE SENSORS FOR THE 2 KPA TO 40 MPA RANGE
BINDER, J.; EHRLER, G.; HEIMER, K.; KRISCH, B.; POPPINGER, M.
WERK DISKRETE HALBLEITER, SIEMENS AG, MUNCHEN, GERMANY;
SIEMENS FORSCH.- AND ENTWICKLUNGSBER. (GERMANY) VOL.13, NO.6 294302
1984 CODEN: SFEBBL
ISSN: 0370-9736
Treatment: PRACTICAL
Doc. Type: JRNL PAP.
Lang.: ENG. (24 Refs)
IN THE IMPORTANT DOMAIN OF MANOMETRY, PIEZORESISTIVE SILICON SENSORS (PS) ARE FINDING INCREASING APPLICATION FOR TRANSDUCING THE NONELECTRIC QUANTITY, PRESSURE, INTO AN ANALOG ELECTRIC SIGNAL. WORK TO DEVELOP PIEZORESISTIVE SENSORS FOR MEASURING RELATIVE OR DIFFERENTIAL PRESSURES AT THE LOW-PRESSURE (LP) LEVELS OF 2, 4 AND 10 KPA, THE MEDIUM-PRESSURE (MP) LEVELS OF 25, 50, 400 AND 1000 KPA, AND THE HIGH-PRESSURE (HP) LEVELS OF 6, 16 AND 40 MPA WITHOUT THE TOTAL DEVIATION OF THE OUTPUT SIGNAL EXCEEDING THE PERMISSIBLE 0.5PERCENT (OVER A TEMPERATURE RANGE OF 100 DEGREESC) OR THE NONLINEARITY L SPECIFIED FOR INDUSTRIAL INSTRUMENTATION AND CONTROL ENG.RING EXCEEDING 0.2PERCENT IS DESCRIBED. TO REALIZE OPTIMUM SENSOR DESIGNS FOR THE VARIOUS PRESSURE RANGES, THE COMPUTER-AIDED DESIGN (CAD) CALCULATIONS WERE PERFORMED BY THE FINITE ELEMENT (FE) METHOD.
Desc.: PRESSURE TRANSDUCERS; PRESSURE MEASUREMENT; PIEZOELECTRIC TRANSDUCERS; FINITE ELEMENT ANALYSIS; SILICON; ELECTRIC SENSING DEVICES
Ident.: FINITE ELEMENT ANALYSIS; SI SENSORS; PRESSURE TRANSDUCERS; PRESSURE MEASUREMENT; PIEZOELECTRIC TRANSDUCERS; MANOMETRY; PIEZORESISTIVE SILICON SENSORS; ANALOG ELECTRIC SIGNAL; OUTPUT SIGNAL; INDUSTRIAL INSTRUMENTATION; CONTROL ENG.RING; COMPUTER-AIDED DESIGN; CAD
Class Codes: B7230; B7320V

Y027013 26
1417277 A85034555, B85017022
METHOD ASPECTS OF AUTOCLAVE CYCLIC CRACK RESISTANCE TESTS OF COMPACT SAMPLES
POKHMURSKI, V.I.; GNYP, I.P.; POPOV, A.A.; TARASYUK, G.P.; DUTSYAK, I.Z. ; TIMONIN, V.M.
G.V. KARPENKO PHYSICOMECH. INST., ACAD. OF SCI., LVOV, UKRAINIAN SSR
FIZ.-KHIM. MEKH. MATER. (USSR) VOL.20, NO.1 81-3 JAN.-FEB. 1984 CODEN: FKMMAJ
ISSN: 0430-6252
Trans in: SOV. MATER. SCI. (USA) VOL.20, NO.1 70-2 JAN.-FEB. 1984 CODEN: SOMA4
ISSN: 0038-5565
USCCC Code: 0038-5565/84/2001-0070$08.50
Treatment: PRACTICAL; EXPERIMENTAL
Doc. Type: JRNL PAP.
Lang.: ENG. (3 Refs)
FOR INVESTIGATIONS OF THE CYCLIC AND STATIC CRACK RESISTANCE OF CASING MATERIALS FOR POWER UNITS UNDER CONDITIONS AS CLOSE AS POSSIBLE TO SERVICE ONES THE AUTHORS HAVE DEVELOPED THE LAKIM-25 LABORATORY AUTOCLAVE. IT MAKES IT POSSIBLE TO INVESTIGATE THE CYCLIC CRACK RESISTANCE OF STANDARD COMPACT SAMPLES UP TO 25 MM THICK IN WATER AT A TEMPERATURE OF 623K AND A PRESSURE OF UP TO 18 MPA. THE AUTOCLAVE CONSISTS OF THE TEST CHAMBER AND AN EXPANSION CHAMBER CONNECTED BY HIGH PRESSURE PIPING, A PANEL FOR AUTOMATIC CONTROL OF THE TEMPERATURE CONDITIONS OF THE TEST CHAMBER, AND AN INDUCTIVE SENSOR FOR MEASURING THE LINEAR DISPLACEMENTS OF THE EDGES OF THE NOTCH IN THE SAMPLE DURING TESTING.
Desc.: FRACTURE TOUGHNESS TESTING; NOTCH TESTING; AUTOMATIC TEST EQUIPMENT; HIGH-PRESSURE TECHNIQUES; TEMPERATURE CONTROL
Ident.: NOTCH EDGE DISPLACEMENT; CYCLIC CRACK RESISTANCE TESTS; COMPACT SAMPLES; CASING MATERIALS; POWER UNITS; LAKIM-25 LABORATORY AUTOCLAVE; 6?3K; 18 MPA; TEST CHAMBER; EXPANSION CHAMBER; HIGH PRESSURE PIPING; AUTOMATIC CONTROL; TEMPERATURE CONDITIONS; INDUCTIVE SENSOR; LINEAR DISPLACEMENTS
Class Codes: A8170; A0670E; A0735; A0670T; B0590; B7210B

Y027013 27
1407151 A8502874
DEVELOPMENT OF HIGH TEMPERATURE AND PRESSURE EH AND PH SENSING INSTRUMENTS
DANIELSON, M.J.; KOSKI, O.H.; MYERS, J.
PACIFIC NORTHWEST LAB., RICHLAND, WA, USA
MCVAY, G.L. (Editors)
SCIENTIFIC BASIS FOR NUCLEAR WASTE MANAGEMENT VII. PROCEEDINGS OF THE SEVENTH INTERNATIONAL SYMPOSIUM 153-60 1984
14-17 NOV. 1983 BOSTON, MA, USA
Publ: NORTH-HOLLAND, NEW YORK, USA
XVIII+1099 pp. ISBN 0 444 00906 X
Treatment: PRACTICAL
Doc. Type: CONF. PAP.
Lang.: ENG. (18 Refs)
THE DESIGN, TESTING, AND CALIBRATION OF METALLIC EH AND ZIRCONIA PH SENSORS FOR USE AT ELEVATED TEMPERATURES AND PRESSURES ARE DISCUSSED.
Desc.: PH MEASUREMENT; HIGH-TEMPERATURE TECHNIQUES; HIGH-PRESSURE TECHNIQUES; REDUCTION (CHEMICAL); OXIDATION; CHEMICAL VARIABLES MEASUREMENT
Ident.: METALLIC EH SENSORS; REDOX POTENTIAL; HIGH PRESSURE; HIGH TEMPERATURE; ZIRCONIA PH SENSORS; ELEVATED TEMPERATURES
Class Codes: A8280; A8290

Y027013 28
1403285 A85024913, B85015055, C8500077
IMPROVEMENT OF THE ACCURACY OF BALANCES WITH FREE MAGNETIC SUSPENSION
GAST, T.
54. UND 57. PTB-SEMINAR UBER MASSEBESTIMMUNG HOHER GENAUIGKEIT (54TH AND 57TH PTB-SEMINAR ON HIGH PRECISION DEFINITION OF MASS) (PTB-ME-60) 79-?0
JUNE 1984
13-14 FEB. 1984 BRAUNSCHWEIG, GERMANY
Publ: PHYS.-TECH. BUNDESANSTALT, BRAUNSCHWEIG, GERMANY
169 pp.
Treatment: EXPERIMENTAL
Doc. Type: CONF. PAP.
Lang.: GERMAN (5 Refs)
MAGNETIC SUSPENSION BALANCES ALLOW WEIGHING IN CORROSIVE OR POISONOUS ATMOSPHERES WITHOUT DANGER TO THE OPERATOR OF DAMAGE TO THE EQUIPMENT. THE DESIGN AND CONSTRUCTION OF A SEMI-MICRO SUSPENSION BALANCE IS DESCRIBED, THE EQUIVALENT CIRCUIT PRESENTED AND THE BLOCK DIAGRAM OF THE ELECTRONIC CONTROL (VOLTAGE CONTROLLED OSCILLATOR, INTEGRATOR, PHASE DISCRIMINATOR, PID REGULATOR, POWER AMPLIFIER) IS GIVEN. THE EFFECT OF VIBRATION IS ANALYSED, THE ELIMINATION OF REACTION EFFECTS IN A SUSPENSION BALANCE WITH THE SENSOR COIL RIGIDLY MOUNTED TO THE HOUSING ARE DISCUSSED AND ALTERNATIVE ELECTRONIC CONTROL CIRCUITS WITH ADAPTIVE CONTROL IN THE LOOP ARE PRESENTED. METHODS OF SELF-CALIBRATION OF A HIGH-PRESSURE SUSPENSION BALANCE ARE DESCRIBED.
Desc.: BALANCES; EQUIVALENT CIRCUITS; ADAPTIVE CONTROL; CALIBRATION
Ident.: MAGNETIC SUSPENSION BALANCES, CORROSIVE ATMOSPHERE; CONTROL LOOP; ACCURACY; FREE MAGNETIC SUSPENSION; POISONOUS ATMOSPHERES; SEMI-MICRO SUSPENSION BALANCE; EQUIVALENT CIRCUIT; ELECTRONIC CONTROL; VOLTAGE CONTROLLED OSCILLATOR; INTEGRATOR; PHASE DISCRIMINATOR; PID REGULATOR; POWER AMPLIFIER; VIBRATION; REACTION EFFECTS; SENSOR COIL; ADAPTIVE CONTROL ; SELF-CALIBRATION; HIGH-PRESSURE SUSPENSION BALANCE
Class Codes: A0630E; B7320M; C3210J

Y027013 29
1401394 B85014789
A NEW FAMILY OF HIGH PRESSURE THICK-FILM SENSORS
DELL'AQUA, R.; DENDI, G.; DELL'ORTO, G.; ROSSI, G.
ISATA 84 PROCEEDINGS. INTERNATIONAL SYMPOSIUM ON AUTOMOTIVE TECHNOLOGY AND AUTOMATION 617-32 VOL.1 1984
24-28 SEPT. 1984 MILAN, ITALY
Publ: ISATA, CROYDON, SURREY, ENGLAND
3 VOL. (XII+IX+1955+149) pp.
Treatment: PRACTICAL
Doc. Type: CONF. PAP.
Lang.: ENG. (8 Refs)
THE PRINCIPLE OF THICK FILM PRESSURE SENSOR IS REVIEWED. THE CONCEPT USED TO DEVELOP THE HIGH PRESSURE SENSING DEVICES IS DISCUSSED AND THE CRITERIA FOR THEIR MASS PRODUCTION WHILE MAINTAINING THE HIGH QUALITY PERFORMANCE OF THE ALREADY WIDELY EXPERIMENTAL LOW PRESSURE ONES ARE DESCRIBED.
Desc.: PRESSURE TRANSDUCERS; THICK FILM RESISTORS; PRESSURE MEASUREMENT
Ident.: THICK FILM RESISTOR; 100-500 BAR; STRAIN GAUGE; CERAMIC CAPSULE; THICK-FILM SENSORS; PRINCIPLE; PRESSURE SENSOR; HIGH PRESSURE SENSING DEVICES; MASS PRODUCTION
Class Codes: B7230; B730V; B2120

Y027013 30
1399451 A85020612, B85012594
OPTICAL FIBRE SENSORS USING WAVELENG.ODULATION AND SIMPLIFIED SPECTRAL ANALYSIS
JONES, B.E.; COLLIER, S.J.
DEPT. OF INSTRUM. AND ANAL. SCI., UNIV. OF MANCHESTER INST OF SCI. AND TECHNOL., ENG.
J. PHYS. E (GB) VOL.17, NO.12 1240-1 DEC. 1984 CODEN: JPSIAE
ISSN: 0022-373
USCCC Code: 0022-3735/84/121240+02$02.25
Treatment: PRACTICAL
Doc. Type: JRNL PAP.
Lang.: ENG. (2 Refs)
TWO WAVELENG.ODULATION SENSORS ARE DESCRIBED: ONE SENSOR USES A MINIATURE MONOCHROMATOR FOR MEASUREMENT OF ANGLE, WHILE A SECOND SENSOR EMPLOYS A PRISM CONNECTED TO A DIFFERENTIAL PRESSURE CELL. WAVELENG.S DETECTED USING A TWIN-ELEMENT PHOTODIODE.
Desc.: FIBRE OPTIC SENSORS; PHOTODIODES; ANGULAR MEASUREMENT
Ident.: ANGULAR MEASUREMENT; WAVELENG.ODULATION; SPECTRAL ANALYSIS; MINIATURE MONOCHROMATOR; MEASUREMENT OF ANGLE; DIFFERENTIAL PRESSURE CELL; TWIN-ELEMENT PHOTODIODE
Class Codes: A4280M; A0630C; B4130; B7230; B7320C

Y027013 31
1395519 C85009218
IMPROVED BOILER CONTROL IN FOOD FACTORIES
WITHMAN, W.E.
Issued by: COMM. EUROPEAN COMMUNITIES, LUXEMBOURG;
1984
IV+81 pp.
Report No.: EUR8924 EN
Treatment: PRACTICAL
Doc. Type: REPORT
Lang.: ENG.
Contract No.: EEB-1-124-81-UK (H)
THE PROJECT UNDERTAKEN IS TO EXPLORE THE POSSIBILITIES OF MAKING USEFUL ENERGY SAVINGS IN AN ACTUAL FACTORY BY USING A CONTINUALLY UPDATED FORWARD FORECAST OF STEAM DEMAND, WHICH CAN BE USED TO MANAGE THE STEAM GENERATION AND DISTRIBUTION SYSTEM IN THE MOST COST-EFFECTIVE MANNER. A DATA-LOGGING COMPUTER WITH STEAM AND OIL METERS AND OTHER SENSORS HAS BEEN INSTALLED AT AN EDIBLE OIL REFINERY. DATA ON BOILER COMBUSTION EFFICIENCY, RELATIVE PROPORTIONS OF HIGH- AND LOW-PRESSURE STEAM, THE MAIN STEAM-USING AREAS AND PLANT AND THE MAGNITUDE AND TIMING OF STEAM DEMANDS FOR INDIVIDUAL OPERATIONS, IS OBTAINED. A CONTROL STRATEGY FOR THE BOILER SYSTEM IS PROPOSED WHICH, BY THE USE OF FORWARD LOAD FORECASTING, CAN PREVENT COINCIDENCE OF DEMAND FROM TWO MAJOR INTERMITTENT STEAM USERS THAN CAN ADVERSELY REDUCE PRESSURE ON THE HIGH PRESSURE MAIN.
Desc.: FOOD PROCESSING INDUSTRY; STEAM PLANTS; BOILERS; PRESSURE CONTROL; COMPUTERISED CONTROL; DATA LOGGERS
Ident.: STEAM DEMAND FORECASTING; STEAM DISTRIBUTION; STEAM METER; COMPUTERISED SAVING; ENERGY SAVINGS; STEAM GENERATION; DATA-LOGGING COMPUTER; OIL METERS; EDIBLE OIL REFINERY; COMBUSTION EFFICIENCY; CONTROL STRATEGY; BOILER SYSTEM; FORWARD LOAD FORECASTING
Class Codes: C3340B; C3350P; C3120R; C7420

Y027013 32
1384718 A85013929, B85009132
ELECTRONIC METHOD FOR ANALYSIS OF THE INTRACRANIAL PRESSURE SIGNAL
KOLLATAJ, J.; WLODARSKI, W.
RES. CENTER FOR MED. TECHNOL., BIALYSTOK, POLAND
Sponsor: IEEE; NAT. UNIV. SINGAPORE; NANYANG TECHNOL. INST.; NAT. COMPUT. BOARD
CONFERENCE PROCEEDINGS TENCON '83. AN INTERNATIONAL CONFERENCE ON CONSUMER AND INDUSTRIAL ELECTRONICS AND APPLICATIONS (IEEE CAT. NO. 84CH1995-) 53-5 1984
17-19 APRIL 1984 SINGAPORE
Publ: IEEE, NEW YORK, USA
175 pp.
Treatment: NEW DEVELOPMENTS; PRACTICAL; EXPERIMENTAL
Doc. Type: CONF. PAP.
Lang.: ENG. (6 Refs)
A METHOD OF EVALUATING TRANSDUCERS FOR THE MEASUREMENT OF INTRACRANIAL PRESSURE IS PRESENTED. FROM INVESTIGATIONS CARRIED OUT ON ANIMALS, IT WAS FOUND THAT THE NEW VERSION OF A TWO-MEMBRANE EPIDURAL TRANSDUCER REDUCES THE ERRORS IN DETERMINING THE INDICES OF INTRACRANIAL COMPENSATION VOLUME SUFFICIENCY. A NEW METHOD OF ANALYZING THE INTRACRANIAL PRESSURE SIGNAL IS PRESENTED WHICH MAKES IT POSSIBLE TO EVALUATE THE EXTENT TO WHICH THE PATIENT IS IN DANGER OF EXCESSIVE INTRACRANIAL PRESSURE. THIS EVALUATION IS MADE BY MEANS OF ONLY A FEW PARAMETERS OBTAINED AS A RESULT OF THIS ANALYSIS. CLINICAL STUDIES HAVE BEEN CARRIED OUT WHICH CONFIRM ITS VALUE IN CLINICAL PRACTICE.
Desc.: BIOMECHANICS; BIOMEDICAL ELECTRONICS; PRESSURE MEASUREMENT; PRESSURE TRANSDUCERS
Ident.: CLINICAL STUDIES; INTRACRANIAL PRESSURE SIGNAL; TRANSDUCERS TWO-MEMBRANE EPIDURAL TRANSDUCER; INTRACRANIAL COMPENSATION VOLUME SUFFICIENCY; PATIENT
Class Codes: A8770; A8745; B7510

Y027013 33
1384514 A85010341, B85008839, C85005221
HIGH SENSITIVE PERMITTIVITY-PROXIMITY SYNTHETIC COMPOSITE MEDIUM CAPACITIVE PRESSURE SENSOR
SIVANANDAN, K.S.
REGIONAL ENG.LL., KEALA, INDIA
Sponsor: IEEE; NAT. UNIV. SINGAPORE; NANYANG TECHNOL. INST.; NAT. COMPUT. BOARD
CONFERENCE PROCEEDINGS TENCON '84. AN INTERNATIONAL CONFERENCE ON CONSUMER AND INDUSTRIAL ELECTRONICS AND APPLICATIONS (IIEE CAT. NO. 84CH1995-0) 6-7 1984
17-19 APRIL 1984 SINGAPORE
Publ: IEEE, NEW YORK, USA
175 pp
Treatment: PRACTICAL
Doc. Type: CONF. PAP.
Lang.: ENG. (3 Refs)
A CAPACITIVE PRESSURE SENSOR BASED ON THE SIMULTANEOUS VARIATION OF TWO TRANSDUCTION QUANTITIES, VIZ., PLATE DISTANCE (PROXIMITY) AND DIELECTRIC CONSTANT (PERMITTIVITY), IS DEVELOPED. THE METHOD IS SIMPLE BUT VERY SENSITIVE TO INPUTS RANGING FROM LOW TO HIGH PRESSURE. IT MAINTAINS GOOD LINEARITY IN DEFINITE OPERATING REGIONS. BY INTRODUCING PROPER MODIFICATIONS IN THE MIXING FORMULAS OF THE INGREDIENTS OF THE DIELECTRIC MEDIUM, A TRANSDUCER OF HIGH SENSITIVITY AT VERY LOW PRESSURE CAN BE DEVELOPED. IT IS POINTED OUT THAT THE ABOVE SENSOR CAN BE EASILY AND EFFECTIVELY UTILIZED IN THE FIELD OF INSTRUMENTATION AND CONTROL, AND ALSO IN THE FIELD OF ROBOTICS.
Desc.: PRESSURE TRANSDUCERS; ELECTRIC SENSING DEVICES
Ident.: SYNTHETIC COMPOSITE MEDIUM; CAPACITIVE PRESSURE SENSOR; 
PLATE DISTANCE; PROXIMITY; DIELECTRIC CONSTANT; PERMITTIVITY; LINEARITY; DIELECTRIC MEDIUM; TRANSDUCER; HIGH SENSITIVITY; VERY LOW PRESSURE; INSTRUMENTATION; CONTROL; ROBOTICS
Class Codes: A0670M; B7230; B7320V; C3240D

Y027013 34
1384481 A85005166, B85008796
MINIATURE PRESSURE TRANSDUCER FOR SCIENCE AND RESEARCH
EEE (GERMANY) NO. 4 30 31 JULY 1984 CODEN: EESTEL
ISSN: 0174-7452
Treatment: PRACTICAL; EXPERIMENTAL
Doc. Type: JRNL PAP.
Lang.: GERMAN
OUTLINES PIEZORESISTIVE PRESSURE TRANSDUCERS WITH PARTICULAR REFERENCE TO CYLINDRICAL AND FLAT DESIGNS AVAILABLE. THE FORMER ARE PARTICULARLY SUITABLE FOR APPLICATIONS IN PROBES OPERATING OVER THE RANGE -195 DEGREESC TO +270 DEGREESC, WHILE THE LATTER HAVE THE ADVANTAGE OF DIRECT FIXING TO SURFACES SUCH AS ROTOR BLADES. KULITE SEMICONDUCTOR PRODUCTS DEVICES ARE ILLUSTRATED.
Desc.: PRESSURE TRANSDUCERS; PIEZOELECTRIC TRANSDUCERS
Ident.: CYLINDRICAL DESIGN; DIRECT SURFACE CONTACT; MINIATURE TYPE; PIEZORESISTIVE PRESSURE TRANSDUCERS; FLAT DESIGNS; PROBES; -195 DEGREESC TO +270 DEGREESC; KULITE SEMICONDUCTOR PRODUCTS
Class Codes: A0670M; A0630; B7230; B7320V

Y027013 35
1370118 A85005171, B85003863, C85000951
AUTOMATED PRESSURE REGULATOR
WAXMAN, M.; DAVIS, H.A.; HOROWITZ, M.; EVERHART, B.
THERMOPHYS. DIV., NBS, WASHINGTON, DC, USA
REV. SCI. INSTRUM. (USA) VOL.55, NO.9 1467-70 SEPT. 1984 CODEN: RSINAK
ISSN: 0034-6748
Treatment: PRACTICAL
Doc. Type: JRNL PAP.
Lang.: ENG. (7 Refs)
A PRESSURE REGULATOR HAS BEEN CONSTRUCTED THAT AUTOMATICALLY NULLS A SENSITIVE DIFFERENTIAL PRESSURE INDICATOR OF THE TYPE USED IN HIGH-QUALITY PVT EXPERIMENTS, THUS PERMITTING AT LEAST PARTIAL AUTOMATION OF SUCH EXPERIMENTS. DISTINGUISHING FEATURES ARE: HIGH RESOLUTION, SUFFICIENT RIGIDITY FOR OPERATION IN A PRESSURE RANGE UP TO 100 MPA, AND A CONTROL LOGIC THAT PERMITS NULLING OF THE PRESSURE TRANSDUCER, EVEN IF THE INITIAL STATE IS VERY FAR FROM BALANCE.
Desc.: PRESSURE CONTROL; CONTROLLERS; INDICATORS; HIGH-PRESSURE TECHNIQUES
Ident.: HIGH PRESSURE TECHNIQUES; PRESSURE CONTROL; SENSITIVE DIFFERENTIAL PRESSURE INDICATOR; HIGH-QUALITY PVT EXPERIMENTS; AUTOMATION; UP TO 100 MPA
Class Codes: A0670T; A0735; B7210B; B7320V; C3?20; C3380D; C3120R

Y027013 36
1363229 B84061975, C85001456
DEVELOPMENT OF A REMOTELY OPERATED SHIP HULL INSPECTION VEHICLE
NICINSKI, S.A.
SEACO INC., KAILUA, HI, USA
Sponsor: IEEE; MARINE TECHNOL. SOC.; OCEANIC ENG.C
PROCEEDINGS OCEANS '83. 'EFFECTIVE USE OF THE SEA: AN UPDATE' 583-7 VOL.1
1983
29 AUG.-1 SEPT. 1983 SAN FRANCISCO, CA, USA
Publ: IEEE, NEW YORK, USA
3 VOL. 1192 pp.
USCCC Code: CH972-9/83/000-0583$01.00
Treatment: APPLIC; PRACTICAL
Doc. Type: CONF. PAP.
Lang.: ENG. (2 Refs)
A NONSWIMMING WHEELED VEHICLE TRAVELS OVER AND REMAINS ATTACHED TO THE STEEL HULL BY MEANS OF MAGNETIC ATTRACTION FORCES. DESIGN GOALS REQUIRE THAT THE MAGNETIC FORCE BE SUFFICIENT TO KEEP THE VEHICLE ATTAINED ON A MODERATELY FOULED SURFACE (1/8SECONDS OF CORROSION SCALE OR MARINE GROWTH) IN A 3-KNOT CURRENT. THE VEHICLE IS SMALL AND LIGHTWEIGHT ENOUGH TO BE DEPLOYED BY TWO PERSONS FROM THE RAIL OR GUNWALES OF A SHIP. IT IS DESIGNED TO TRAVEL AT A MAXIMUM SPEED OF THREE MILES PER HOUR AND TO BE CAPABLE OF TRAVERSING RIVETS AND PLATE LAP SEAMS. THE OUTER SHELL IS DESIGNED TO ACCOMMODATE A VARIETY OF TELEOPERATOR SENSORS. THE FUTURE VEHICLE IS DESIGNED TO IMPLRMENT A HIGH-PRESSURE WATERJET FOR SURFACE PREPARATION TO FACILITATE NONDESTRUCTIVE TESTING TECHNIQUES EXPECTED TO INCLUDE VISUAL SYSTEMS (MONOSCOPIC OR STEREOSCOPIC), ULTRASONICS, AND MAGNETIC PARTICLE INSPECTION.
Desc.: NAVAL ENG.RING; VEHICLES; INSPECTION; NONDESTRUCTIVE TESTING; SHIPS; TELECONTROL
Ident.: ROV; REMOTELY OPERATED SHIP HULL INSPECTION VEHICLE; WHEELED VEHICLE; MAGNETIC ATTRACTION FORCES; CORROSION SCALE; MARINE GROWTH; TELEOPERATOR SENSORS; HIGH-PRESSURE WATERJET; SURFACE PREPARATION; NONDESTRUCTIVE TESTING
Class Codes: B7710D; C3360J; C3250

Y027013 37
1352429 A84106311, B84061761
CARBON DIOXIDE SENSOR FOR USE AT HIGH AMBIENT PRESSURES
WINNICK, J.
DEPT. OF CHEM. ENG. GEORGIA INST. OF TECHNOL., ATLANTA, GA, USA
Sponsor: IEEE; MARINE TECHNOL. SOC.; OCEANIC ENG.C
PROCEEDINGS OCEANS '83. 'EFFECTIVE USE OF THE SEA: AN UPDATE' 474-8 VOL.1
1983
29 AUG.-1 SEPT. 1983 SAN FRANCISCO, CA, USA
Publ: IEEE, NEW YORK, USA
3 VOL. 1192 pp.
USCCC Code: CH1972-9/83/0000-0474$01.00
Treatment: APPLIC; PRACTICAL
Doc. Type: CONF. PAP.
Lang.: ENG.
AN ELECTROCHEMICAL SENSOR DESIGNED ON THE BASIS OF THE NERNST PRINCIPLE HAS BEEN TESTED. BECAUSE OXYGEN PRESSURE MUST BE ACCOUNTED FOR IN THE SIGNAL, A SEPARATE NERNSTIAN OXYGEN SENSOR IS NEEDED BOTH ARE CONSTRUCTED WITH SOLID STATE REFERENCES, OBVIATING THE NEED FOR REFERENCE GASES. PRELIMINARY TESTING INDICATES THIS CONCEPT MAY BE USEFUL FOR DEEP DIVING APPLICATIONS.
Desc.: CARBON COMPOUNDS; ELECTROCHEMICAL ANALYSIS; HIGH-PRESSURE TECHNIQUES; BIOMEDICAL EQUIPMENT; ELECTRIC SENSING DEVICES
Ident.: CO/SUB 2/ SENSOR; ELECTROCHEMICAL SENSORD NERNST PRINCIPLE; OXYGEN PRESSURE; SOLID STATE REFERENCES; TESTING; DEEP DIVING
Class Codes: A0670D; A8280F; A073?; A8770; B7510; B7320T; B7230

Y027013 38
1352283 A84106319, B84061602
TWO METHODS FOR MEASURING SHOCK RELATIONS WITH IMPROVED EMV GAUGE
LIANG YUNMIN; ZHAO HENG.
BEIJING INST. OF TECHNOL., BEIJING, CHINA
ASAY, J.R.; GRAHAM, R.A.; STRAUB, G.K. (Editors)
Sponsor: APS
SHOCK WAVES IN CONDENSED MATTER - 1983. PROCEEDINGS OF THE AMERICAN PHYSICAL SOCIETY TOPICAL CONFERENCE 239-42 1984
18-21 JULY 1983 SANTA FE, NM, USA
Publ: NORTH-HOLLAND, AMSTERDAM, NETHERLANDS
XVII+647 pp. ISBN 0 444 86904 2
Treatment: NEW DEVELOPMENTS; PRACTICAL; EXPERIMENTAL
Doc. Type: CONF. PAP.
Lang.: ENG. (5 Refs)
IN THIS PAPER, THE SERIES VELOCITY GAUGE (SVG) AND THE PRESSURE-VELOCITY GAUGE (PVG) ARE PRESENTED. BOTH ARE NEW METHODS SIMPLY MODIFYING DREMIN LOOPS, AND HAVE BEEN USED TO OBTAIN AT LEAST TWO PARAMETERS RESPECTIVELY. THESE TWO METHODS ARE DIRECT MEASUREMENT, IN WHICH NO CALIBRATION WOULD BE REQUIRED, SO THEY ARE VERY CONVENIENT FOR MEASURING THE EOS OF NONCONDUCTIVE MATERIALS. THE RESULTS MEASURED IN THE SAME SAMPLE WITH THESE TWO METHODS ARE EXAMINED AND COMPARED WITH CALCULATED VALUES. IF SEVERAL ACTIVE ELEMENTS OF THE SERIES GAUGE ARE EMBEDDED IN THE SAME PLANE THE AMPLITUDE OF THE SIGNAL OUTPUT WILL BE MULTIPLIED IN ACCORDANCE WITH THE NUMBER OF SINGLE STAGES. THIS WOULD BE USEFUL FOR MEASURING A WEAK WAVE.
Desc.: SHOCK WAVES; SHOCK MEASUREMENT; VELOCITY MEASUREMENT; PRESSURE MEASUREMENT; PRESSURE TRANSDUCERS
Ident.: SHOCK RELATIONS; EMV GAUGE; VELOCITY GAUGE; PRESSURE-VELOCITY GAUGE; DREMIN LOOPS; NONCONDUCTIVE MATERIALS; SIGNAL OUTPUT
Class Codes: A0710; A0630G; A0670M; B7320Z; B7320E; B7320V; B7230

Y027013 39
1352068 B84061351
MINIATURE SENSOR SYSTEMS SUIT MANY PROCESS APPLICATIONS
TRANSDUCER TECHNOL. (GB) VOL.7, NO.3 27 JUNE 1984 CODEN: TTECDX
ISSN: 0143-7275
Treatment: GENERAL, REVIEW; PRACTICAL
Doc. Type: JRNL PAP.
Lang.: ENG.
PHILIPS HAS EXTENDED THE SCOPE OF ITS PRESSURE MEASUREMENT CAPABILITY BY INTRODUCING A RANGE OF MINIATURE PRESSURE SENSORS. COMBINING HIGH SENSITIVITY, HIGH STABILITY, AND LONG LIFE, THE UNITS CATER FOR VIRTUALLY ALL INDUSTRIAL GAS AND LIQUID APPLICATIONS. THE COMPLETE ABSENCE OF MOVING PARTS PRECLUDES WEAR AND ENSURES CONSTANT DEPENDABLE SERVICE. SMALL SIZE GREATLY EXTENDS APPLICATIONAL SCOPE. AMONGST THE MINIATURE PRESSURE SENSORS DESCRIBED ARE: KS 2150, KS 2151 AND KS 2152; PR 9361 AND PR 9362; AND PR 939.
Desc.: PRESSURE TRANSDUCERS; ELECTRIC SENSING DEVICES; PRESSURE MEASUREMENT
Ident.: PROCESS APPLICATIONS; PHILIPS; PRESSURE MEASUREMENT; MINIATURE PRESSURE SENSORS
Class Codes: B7230; B7320V

Y027013 40 
316935 A84090580, B84048885
SILICON, STRUCTURAL MATERIAL FOR MICROENG.RING (TRANSDUCER DESIGN)
KANEL, A.
REV. POLYTECH. (SWITZERLAND) NO.5 619, 621 MAY 1984 CODEN: RVPTBR
ISSN: 0374-4256
Treatment: PRACTICAL
Doc. Type: JRNL PAP.
Lang.: FRENCH
IN ADDITION TO INTEGRATED CIRCUIT MANUFACTURE SILICON IS USED IN A WIDER VARIETY OF MINIATURE COMPONENTS FOR APPLICATIONS OTHER THAN ELECTRONICS. A PIEZOELECTRIC PRESSURE TRANSDUCER IS DESCRIBED AND OTHER TRANSDUCERS ARE OUTLINED.
Desc.: PIEZOELECTRIC TRANSDUCERS; PRESSURE MEASUREMENT; TRANSDUCERS ; ELEMENTAL SEMICONDUCTORS; SILICON
Ident.: SI; ELEMENTAL SEMICONDUCTOR; PIEZOELECTRIC PRESSURE TRANSDUCER
Class Codes: A0670M; B7230; B7320V

Y027013 41
1315369 A84086409, B84048889
ASSESSMENT OF METROLOGICAL PARAMETERS BY MEANS OF FIBER-OPTIC SENSORS
KIST, R.
FRAUNHOFER-INST. FUR PHYS. MESSTECH., FREIBURG, GERMANY
TECH. MESS. TM (GERMANY) VOL.51, NO.6 205-12 JUNE 1984 CODEN: TMTMDL
ISSN: 0171-8096
Treatment: EXPERIMENTAL 
Doc. Type: JRNL PAP.
Lang.: GERMAN (17 Refs)
FIBER-OPTIC SENSORS WILL GET THEIR SHARE OF THE SENSOR MARKET ONLY IF THEY CAN BE MADE AVAILABLE AT LOW PRICES OR IF THEY CAN SOLVE METROLOGICAL PROBLEMS THAT HAVE NO SUITABLE SOLUTIONS WITHIN CONVENTIONAL SENSOR TECHNIQUES. SINCE FIBER-OPTIC COMPONENTS ARE IN GENERAL STILL HIGH COST ITEMS, FIBER-OPTIC SENSORS ARE NOT LIKELY TO BECOME COMPETITIVE IN THIS RESPECT WITHIN THE NEAR FUTURE. THESE SENSORS DO PROVIDE, HOWEVER, IMPORTANT SPECIFIC ADVANTAGES SUCH AS ISOLATION AGAINST HIGH VOLTAGE, IMMUNITY AGAINST ELECTROMAGNETIC FIELDS AS WELL AS EXPLOSIVE AND/OR CORROSIVE ENVIRONMENTS, POSSIBILITY OF MINIATURIZED AND COMPACT PACKAGING OF THE SENSING ELEMENT, AND APPLICATION WITHIN A BROAD TEMPERATURE RANGE. MULTIMODE FIBER-OPTIC SENSORS FOR PARAMETERS SUCH AS TEMPERATURE, PRESSURE, LEVEL, AND REFRACTIVE INDEX ARE ON THE MARKET ALREADY OR VERY CLOSE TO BEING COMMERCIALIZED. MONOMODE FIBER-OPTIC SENSORS ARE NOT YET ON THE MARKET DUE TO THEIR MORE DEMANDING TECHNOLOGY AND THE CORRESPONDING HIGHER COST LEVEL. THEY ARE EXPECTED, HOWEVER, TO PROVIDE AT ACCEPTABLE COSTS IN THE FORSEEABLE FUTURE HIGH PRECISION SOLUTIONS FOR METROLOGICAL TASKS UNDER SPECIFIC CONDITIONS (EG. TEMPERATURE MEASUREMENT IN A MICROWAVE FIELD).
Desc.: FIBRE OPTICS; NONELECTRIC SENSING DEVICES
Ident.: EMI SUPPRESSION; TEMPERATURE SENSORS; PRESSURE SENSORS; EXPLOSIVE ENVIRONMENTS; LEVEL SENSORS; REFRACTIVE INDEX SENSORS; MONOMODE SENSORS; METROLOGICAL PARAMETERS; FIBER-OPTIC SENSORS; ISOLATION; CORROSIVE ENVIRONMENTS; PACKAGING; SENSING ELEMENT; BROAD TEMPERATURE RANGE
Class Codes: A0670D; A4280M; B7230; B4130

Y027013 42
131535 B84048874, C84038190
PIEZO-RESISTIVE SILICON PRESSURE SENSORS
ALMASI, I.; BARSONY, I.; BERKECZ, J.
MIKROELEKTRONIKAI VALLALAT, BUDAPEST, HUNGARY
MERES AND AUTOM. (HUNGARY) VOL.32, NO.4 132-6 1984 CODEN: MEAUAI
ISSN: 0025-9993
Treatment: PRACTICAL
Doc. Type: JRNL PAP.
Lang.: HUNGARIAN (8 Refs)
THE AUTHORS DISCUSS DEVELOPMENT ASPECTS OF ONE OF THE MOST IMPORTANT TYPES OF THE MICROELECTRONIC SENSORS, THE SILICON PRESSURE SENSORS WORKING ON THE PRINCIPLE OF PIEZO-RESISTIVITY. THE BASIC REQUIREMENTS TO PRESSURE SENSORS ARE THE HIGH PRESSURE-SENSITIVITY, THE LOW NONLINEARITY AND THE LOW TEMPERATURE DEPENDENCE. TAKING THESE INTO ACCOUNT, THE TECHNOLOGICAL-THEORETICAL BACKGROUND OF THE PRESSURE MEASURING FAMILY OF THE MICROELECTRONICS ENTERPRISE IS DESCRIBED, WITHIN THE RANGE OF 0.4-600 BAR.
Desc.: ELECTRIC SENSING DEVICES; PRESSURE TRANSDUCERS; PRESSURE MEASUREMENT; PIEZOELECTRIC TRANSDUCERS; ELEMENTAL SEMICONDUCTORS; SILICON
Ident.: PIEZORESISTIVE SI PRESSURE SENSORS; LOW NONLINEARITY; LOW TEMPERATURE DEPENDENCE
Class Codes: B7230; B7320V; C3240D; C3120

Y027013 43
1306930 A84087531
THEORETICAL AND EXPERIMENTAL STUDY OF THE CONTRIBUTION OF RADIAL MODES TO THE PULSED ULTRASONIC FIELD RADIATED BY A THICK PIEZOELECTRIC DISK
BABOUX, J.C.; LAKESTANI, F.; PERDRIX, M.
LAB. DE TRAITEMENT DU SIGNAL ET D'ULTRASONS, INST. NAT. DES SCI. APPLIQUEES, VILLEURBANNE, FRANCE
J. ACOUST. SOC. AM. (USA) VOL.75, NO.6 1722-31 JUNE 1984 CODEN: JASMAN
ISSN: 0001-4966
USCCC Code: 0001-4966/84/061722-10$00.80
Treatment: THEORETICAL
Doc. Type: JRNL PAP.
Lang.: ENG. (33 Refs)
A THEORETICAL MODEL IS PRESENTED FOR EVALUATING THE TRANSIENT FIELD RADIATED ON THE AXIS OF A THICK PIEZOELECTRIC DISK, BY VIBRATIONS PROPAGATING RADIALLY ON THE CIRCULAR TRANSMITTING FACE, FROM ITS RIM TOWARDS ITS CENTER. THE AUTHORS HAD PREVIOUSLY CONSIDERED THESE VIBRATIONS TO ACCOUNT FOR TWO UNEXPECTED SIGNALS (DENOTED S/SUB 1/ AND S/SUB 2/), WHICH WERE OBSERVED BY MEASURING, WITH A MINIATURE PROBE, THE FIELD PRODUCED IN A LIQUID BY A BARIUM TITANATE DISK (25 MM IN DIAMETER, 20 MM IN THICKNESS). THESE SIGNALS S/SUB 1/ AND S/SUB 2/, NOT DESCRIBED BY THE WILL-KNOWN PISTON MODEL, ARE DUE TO VIBRATIONS WHICH PROPAGATE RADIALLY ON THE DISK FACE AT TWO DIFFERENT SPEEDS ?5.0*10/SUP 3/ AND 2.6*10/SUP 3/ M/S); THEY HAVE CALLED THEM RADIAL VIBRATIONS AS A SIMPLIFICATION. HERE, A SIMULATION IS UNDERTAKEN TO EXPLAIN THE COMPLEX CHANGES OBSERVED IN THE AMPLITUDE AND IN THE SHAPE OF SIGNALS S/SUB 1/ AND S/SUB 2/, WHEN THE DISTANCE FROM THE DISK FACE VARIES. IN THIS THEORETICAL APPROACH, IT IS ASSUMED THAT THE DISTURBANCE INITIALLY LOCATED ON THE RIM OF THE DISK FACE REMAINS UNCHANGED DURING ITS PROPAGATION ALONG A DISK RADIOS. WITH THESE SIMPLIFYING HYPOTHESES, DIFFERENT ANALYTICAL EXPRESSIONS FOR THE IMPULSE VELOCITY POTENTIAL PHI/SUB I/ (T) ARE OBTAINED, EACH OF THEM VALID IN A LIMITED AREA OF THE DISK AXIS. THE RESULTING TRANSIENT PRESSURE P (T) IS THEN USED TO PREDICT THE SIGNALS DETECTED BY THE MINIATURE PROBE. FOR THIS SIMULATION THEY HAVE TAKEN ACCOUNT OF THE TIME DEPENDENCE OF THE INITIAL MOTION, TOGETHER WITH THE RESPONSE OF THE MEASURING DEVICE. SEVERAL PLOTS ARE CHOSEN TO ILLUSTRATE THE INFLUENCE OF DIFFERENT PARAMETERS SUCH AS THE SPEED OF THE RADIAL VIBRATION OR THE DURATION OF THE INPUT EXCITATION SIGNAL. FINALLY, THE COMPARISON WITH THE EXPERIMENTAL RESULTS PROVES THE EFFICIENCY OF THEIR MODEL TO DESCRIBE THE MAIN CHARACTERISTICS OF THE SIGNALS PRODUCED BY THE RADIAL VIBRATIONS; THEIR CONTRIBUTION IS IMPORTANT ONLY CLOSE TO THE DISK FACE AND THE POSITION OF A PARTICULAR POINT ON AXIS, CALLED FOCUS, IS CORRECTLY PREDICTED. DIFFERENT POSSIBLE IMPROVEMENTS IN THE MODELING ARE ALSO DISCUSSED.
Desc.: PIEZOELECTRICITY; ULTRASONIC PROPAGATION; ULTRASONIC TRANSDUCERS
Ident.: DIGITAL SIMULATION; ULTRASONIC TRANSDUCERS; RADIAL MODES; PULSED ULTRASONIC FIELD; THICK PIEZOELECTRIC DISK; TRANSIENT FIELD; PISTON MODEL; TRANSIENT PRESSURE; RADIAL VIBRATIONS
Class Codes: A4388; A4320

Y027013 44
1284391 B84039156
SEMICONDUCTOR TRANSDUCER FOR MEASUREMENT OF LOW PRESSURES WITH UNIVERSAL STRAIN MODULE (ENG.TESTING)
ZAGANYAN, YU.I.; MAR'YANOVA, I.I.; IVASHCUK, I.M.; KUTRAKOV, A.P.; POLISHCHUK, O.A.
PRIB. AND SIST. UPR. (USSR) NO.3 31-2 1984 CODEN: PRSUBT
ISSN: 0032-8154
Trans in: SOV. J. INSTRUM. AND CONTROL (GB) CODEN: SJICA3
Treatment: PRACTICAL
Doc. Type: JRNL PAP.
Lang.: RUSSIAN (5 Refs)
THE DEVICE DESCRIBED IS DESIGNED FOR DIAGNOSTIC TESTS OF MOTORS AND ENG. AND IS SUITABLE FOR USE FOR TEMPERATURES UP TO 350 DEGREESC. PHOTOGRAPHS AND SPECIFICATIONS ARE INCLUDED. THE PROBLEM OF CALIBRATION FOR HIGHER TEMPERATURES IS ALSO CONSIDERED.
Desc.: TESTING; PRESSURE MEASUREMENT; CALIBRATION; ENG.; PRESSURE TRANSDUCERS; TEST EQUIPMENT
Ident.: LOW-PRESSURE MEASUREMENT; SEMICONDUCTOR TRANSDUCER; UNIVERSAL STRAIN MODULE; DIAGNOSTIC TESTS; MOTORS; ENG.; 350 DEGREE C; CALIBRATION
Class Codes: B7230; B7320V; B7130

Y027013 45
1280530 C84031767
ON-LINE INSPECTION. II. ANALYSING THE DATA
MEAS. AND CONTROL (GB) VOL.17, NO.4 124-6 APRIL 1984 CODEN: MEACBX
ISSN: 0020-2940
Treatment: PRACTICAL
Doc. Type: JRNL PAP.
Lang.: ENG.
FOR PT.I SEE IBID., VOL.17, NO.2, P.6. BRITISH GAS OPERATES A COMPREHENSIVE SYSTEM FOR ROUTINE INSPECTION OF HIGH-PRESSURE GAS PIPELINES. INSTRUMENTED INSPECTION DEVICES, POPULARLY KNOWN AS INTELLIGENT PIGS, TRAVEL INSIDE THE PIPELINE AND USE MAGNETIC AND ULTRASONIC TECHNIQUES TO SCAN THE PIPE WALLS IN ORDER TO DETECT ANY UNUSUAL FEATURES, SUCH AS METAL LOSS AND HAIRLINE SURFACE CRACKS. RELEVANT DATA ARE RECORDED AND WHEN AN INSPECTION RUN IS COMPLETED, THE RECORDED DATA ARE RECOVERED AND ANALYSED BY COMPUTERS AT THE BRITISH GAS ON-LINE INSPECTION CENTRE, NEAR NEWCASTLE-UPON-TYNE. AT THE ON-LINE INSPECTION CENTRE, THE TAPE RECORDING FROM THE INSPECTION RUN IS REPLAYED TO PRODUCE STANDARD COMPUTER TAPES, WHICH CAN THEN BE ANALYSED. THE COMPUTER THEN REFORMATS AND REORGANISES THE DATA SO THAT INFORMATION FROM THE VARIOUS TYPES OF SENSOR IS PROPERLY ALIGNED AND CORRELATED WITH POSITIONAL DATA. THE NEXT PROCESS IS TO REJECT SIGNALS FROM NORMAL, DEFECT-FREE PIPELINE FITTINGS SUCH AS WELDS AND BENDS. EACH FITTING GIVES A PARTICULAR SHAPE OF SIGNAL WHICH CAN BE IDENTIFIED, CHECKED AND THEN ELIMINATED. SIGNIFICANT SENSOR DATA ARE THEN PRESENTED ON AN ELECTROSTATIC PLOTTER AND INTERPRETED BY TRAINED OPERATORS. THIS FORM OF OUTPUT ALLOWS MANY PARALLEL SENSOR TRACES TO BE PLOTTED AND QUICKLY ANALYSED. DURING THIS STAGE OF THE ANALYSIS, A DETAILED MAP OF THE PIPELINE IS COMPILED SHOWING THE POSITION OF EVERY WELD AND FITTING. THIS IS USED TO PINPOINT THE POSITION OF DEFECTS AND TO UPDATE THE PIPELINE ENG.R'S RECORDS. FINALLY, A MATHEMATICAL SIZING MODEL, USED IN CONJUNCTION WITH A COMPUTER GRAPHICS TERMINAL, IS EMPLOYED TO OBTAIN A DIRECT ESTIMATE OF THE SIZE AND SHAPE OF DEFECTS. THIS SYSTEM IS COMPLEMENTED BY A COMPARATIVE SIZING TECHNIQUE BASED ON AN AUTOMATIC SEARCH THROUGH A LARGE LIBRARY OF KNOWN SIGNALS.
Desc.: DATA REDUCTION AND ANALYSIS; INSPECTION; MECHANICAL ENG.RING COMPUTING
Ident.: MECHANICAL ENG.RING AND COMPUTING; INSPECTION HIGH-PRESSURE GAS PIPELINES; INTELLIGENT PIGS; BRITISH GAS ON-LINE INSPECTION CENTRE
Class Codes: C7440

Y027013 46
1267976 B84033534, C84024617
LIQUID-GAS PRESSURE GAUGES: HOW TO COMPARE THEM
MESURES (FRANCE) VOL.49, NO.3 61-3 5 MARCH 1984 CODEN: MSRSET
ISSN: 0026-0193
Treatment: PRACTICAL
Doc. Type: JRNL PAP.
Lang.: FRENCH (1 Refs)
THE ARTICLE DEALS WITH A HIGHLY S'ITIVE GAS/OIL INTERFACE DIFFERENTIAL PRESSURE INDICATOR USED FOR THE COMPARISON OF PISTON-TYPE PRESSURE GAUGES FOR OIL WITH THOSE FOR GASES. IN THE COMPARATOR THE OIL AND THE GAS ARE IN DIRECT CONTACT AND THE LEVEL OF THE RESULTING INTERFACE (THE POSITION OF THE SURFACE OF THE OIL) IS MEASURED BY A CAPACITIVE METHOD DEPENDING UPON THE DIFFERENT DIELECTRIC CONSTANTS OF THE TWO MEDIA. THE PRINCIPLE OF THE xDDEVICE AND ITS METHOD OF OPERATION ARE DESCRIBED. IT IS APPLICABLE IN THE PRESSURE RANGE F 0.4 TO 4 MPA (4 TO 40 BAR). THE METHOD WAS DEVISED BY THE US NATIONAL BUREAU OF STANDARDS.
Desc.: PRESSURE MEASUREMENT; INDICATORS; PRESSURE TRANSDUCERS
Ident.: GAS/OIL INTERFACE DIFFERENTIAL PRESSURE INDICATOR; PISTON-TYPE PRESSURE GAUGES; COMPARATOR; CAPACITIVE METHOD; 0.4 TO 4 MPA; 4 TO 40 BAR; NATIONAL BUREAU OF STANDARDS
Class Codes: B7320V; B7230; C3120R; C3210B

Y027013 47
1263583 C84027430
TRI-AXIAL GRAPHICS AS AN AID TO UNDERSTANDING LEFT VENTRICULAR FUNCTION IN CONSCIOUS DOGS
WILLSHAW, P.; LASCANO, E.C.; CROTTOGINI, A.J.; NEGRONI, A.; PICHEL, R.
TEACHING AND RES. DEPT., FAVALORO FOUNDATION, BUENOS AIRES, ARGENTINA
J. BIOMED. ENG.B) VOL.6, NO.2 107-12 APRIL 1984 CODEN: JBIEDR
ISSN: 0141-5425
USCCC Code: 0141-54?5/84/020107-06$03.00
Treatment: PRACTICAL; EXPERIMENTAL
Doc. Type: JRNL PAP.
Lang.: ENG. (10 Refs)
ULTRASONIC DISTANCE GAUGES WERE IMPLANTED IN THE LEFT VENTRICLE OF DOGS TO MEASURE CONTINUOUSLY VENTRICULAR WALL THICKNESS AND SMALL AXIS DIAMETER. A MINIATURE TRANSDUCER WAS IMPLANTED TO MEASURE INTRAVENTRICULAR PRESSURE. THE CIRCUMFLEX ARTERY COULD BE OCCLUDED MECHANICALLY TO MIMIC CORONARY SPASM. RECORDINGS WERE MADE ON TAPE AFTER ALLOWING EIGHT DAYS POST-OPERATIVE RECUPERATION. THE TAPED SIGNALS WERE DIGITISED AND PROCESSED TO SHOW GRAPHICAL RELATIONSHIPS BETWEEN SELECTED VARIABLES. THE AUTHORS FOUND THAT TRIAXIAL (3D) GRAPHICS GREATLY ENHANCED THEIR ABILITY TO INTERPRET MOMENT BY MOMENT CHANGES IN THESE RELATIONSHIPS, AND RECOMMEND THIS PROCEDURE TO OTHERS.
Desc.: CARDIOLOGY; COMPUTER GRAPHICS; BIOLOGY COMPUTING
Ident.: BIOLOGY COMPUTING; ULTRASONIC DISTANCE GAUGES; TRIAXIAL GRAPHICS; MYOCARDIAL ISCHAEMIA; CARDIOVASCULAR SYSTEM; LEFT VENTRICULAR FUNCTION; CONSCIOUS DOGS; VENTRICULAR WALL THICKNESS; INTRAVENTRICULAR PRESSURE; CIRCUMFLEX ARTERY; CORONARY SPASM
Class Codes: C7330

Y027013 48
1257540 A84058862
NEW METHOD OF CALIBRATING AND CHECKING VACUUM GAUGES
KUZ'MIN, V.V.
IZMER. TEKH. (USSR) VOL.26, NO.7 27-9 JULY 1983 CODEN: IZTEAW
ISSN: 0021-3349
Trans in: MEAS. TECH. (USA) VOL.26, NO. 539-41 JULY 1983 CODEN: MSTCAL
ISSN: 0543-1972
USCCC Code: 0543-1972/83/2607-0539$07.50
Treatment: NEW DEVELOPMENTS; PRACTICAL
Doc. Type: JRNL PAP.
Lang.: ENG. (7 Refs) 
THE CALIBRATION AND CHECKING OF VACUUM GAUGES FOR HIGH AND SUPERHIGH VACUUM IS PERFORMED BY ESTABLISHING AN EXACT RELATIONSHIP BETWEEN THE LOW PRESSURE IN THE CALIBRATION CHAMBER RECORDED BY THE VACUUM GAUGE AND A HIGH PRESSURE MEASURED DIRECTLY BY MEANS OF A STANDARD MANOMETER. THIS RELATIONSHIP IS REALIZED IN VARIOUS FORMS OF THE PRESSURE REDUCTION METHOD. THE EFFECTS OF GAS SORPTION AND DESORPTION ARE LARGE WHEN THERE IS STRICTLY LIMITED PUMPING, WHICH IS EXTREMELY CHARACTERISTIC OF REDUCTION SYSTEMS. SYSTEMATIC ERRORS ARISE IF THESE PROCESSES ARE NEGLECTED DURING CALIBRATION OR CHECKING, AND THE ERROR INCREASES AS THE PRESSURE IS REDUCED. A METHOD OF CALIBRATING AND CHECKING VACUUM GAUGES IN WHICH THIS DIFFICULTY IS LARGELY OVERCOME IS PRESENTED. THE VACUUM SYSTEM INCLUDES THE STANDARD ABSOLUTE MANOMETER AND THE GAUGE TO BE CALIBRATED OR CHECKED (OR MANOMETRIC TRANSDUCER), WHICH ARE ATTACHED TO THE INITIAL PRESSURE CHAMBER AND THE CALIBRATION CHAMBER OF KNOWN VOLUME. BETWEEN THESE CHAMBERS THERE IN A DIAPHRAGM.
Desc.: VACUUM GAUGES; CALIBRATION
Ident.: VACUUM GAUGES; CALIBRATION; CHECKING; SUPERHIGH VACUUM; STANDARD ABSOLUTE MANOMETER
Class Codes: A0730D; A0620H

Y027013 49
1234714 B84022948
GAS CLEANING TECHNOLOGY FOR HIGH-TEMPERATURE, HIGH-PRESSURE GAS STREAMS
Issued by: ELECTR. POWER RES. INST., PALO ALTO, CA, USA;
15 SEPT. 1983
192 pp.
Availability: EPRI, BOX 50490, PALO ALTO, CA 94303, USA
Report No.: EPRI-CS3197
Treatment: EXPERIMENTAL
Doc. Type: REPORT
Lang.: ENG.
THIS REPORT PRESENTS THE RESULTS OF TESTS ON WOVEN CERAMIC BAG, POROUS SINTERED-METAL TUBE AND POROUS CERAMIC CANDLE TUBE FILTERS FOR HOT GAS CLEARING IN PRESSURISED FLUIDISED-BED COMBUSTION POWER PLANTS. TESTS WERE PERFORMED ALSO ON A DEVELOPMENTAL FILTER ?CAKE MASS DETECTOR AND A COMMERCIALLY AVAILABLE OPTICAL PARTICLE TRANSDUCER FOR DUST PENETRATION. HIGHLIGHTED PROBLEMS OF THE RIGID FILTERS INCLUDE CLEANING OVER LONG PERIODS OF OPERATION, AND WEAKENING OF THE SINTERED STAINLESS STEEL AT HIGH TEMPERATURES AND PRESSURES.
Desc.: HIGH-TEMPERATURE PHENOMENA AND EFFECTS; FLUIDISED BEDS; HIGH-PRESSURE PHENOMENA AND EFFECTS; COMBUSTION; MATERIALS TESTING; AIR POLLUTION DETECTION AND CONTROL; DUCT; FILTRATION; CERAMICS
Ident.: WOVEN CERAMIC BAG FILTERS; POROUS SINTERED-METAL TUBE FILTERS; HOT GAS CLEANUP; HIGH PRESSURES; TESTS; POROUS CERAMIC CANDLE TUBE FILTERS; PRESSURISED FLUIDISED-BED COMBUSTION POWER PLANTS; FILTER CAKE MASS DETECTOR; OPTICAL PARTICLE TRANSDUCER; DUST PENETRATION; CLEANING; WEAKENING; SINTERED STAINLESS STEEL; HIGH TEMPERATURES
Class Codes: B8230E; B7720

Y027013 50
1232347 A84038591, B84020260
ENVIRONMENTALLY INSENSITIVE DIAPHRAGM REFLECTANCE PRESSURE TRANSDUCER
LAWSON, C.M.; TEKIPPE, V.J.
GOULD RES. CENTER, GOULD INC., ROLLING MEADOWS, IL, USA
Sponsor: SPIE
PROC. SPIE INT. SOC. OPT. ENG.SA) VOL.412 96-103 1983 CODEN: PSISDG
ISSN: 0277-786X
FIBER OPTIC AND LASER SENSORS 5-7 APRIL 1983 ARLINGTON, VA, USA
Treatment: NEW DEVELOPMENTS; PRACTICAL; EXPERIMENTAL
Doc. Type: CONF. PAP.
Lang.: ENG. (9 Refs)
A NOVEL FIBER OPTIC SENSOR THAT DETERMINES PRESSURE FROM DIAPHRAGM CURVATURE IS DISCUSSED. THIS SENSING TECHNIQUE EXHIBITS A HIGH DEGREE OF SENSITIVITY AND LINEARITY AND IS LESS SUSCEPTIBLE TO ENVIRONMENTAL PERTURBATIONS THAN PREVIOUS INTENSITY MODULATING TECHNIQUES. EXPERIMENTAL RESULTS ARE PRESENTED FOR A PRESSURE TRANSDUCER OPERATIONAL IN THE 0-60 PSI RANGE, AND A MINIATURE PRESSURE TRANSDUCER OPERATIONAL IN THE 0-5 PSI RANGE DESIGNED FOR IN VIVO MEDICAL APPLICATIONS. 
Desc.: CURVATURE MEASUREMENT; PRESSURE MEASUREMENT; PRESSURE TRANSDUCERS; FIBRE OPTICS; DIAPHRAGMS; BIOMEDICAL EQUIPMENT
Ident.: ENVIRONMENTALLY INSENSITIVE DIAPHRAGM REFLECTANCE PRESSURE TRANSDUCER; PRESSURE MEASUREMENT; FIBER OPTIC SENSOR; DIAPHRAGM CURVATURE; SENSITIVITY; LINEARITY; ENVIRONMENTAL PERTURBATIONS; INTENSITY MODULATING TECHNIQUES; MINIATURE PRESSURE TRANSDUCER; IN VIVO MEDICAL APPLICATIONS
Class Codes: A4280M; A0630C; A06?0M; A8760G; A8770; B4130; B7320C; B7320V ; B7230; B7510B

Y027013 51
1232346 A84038590, B84020259
FIBER OPTIC METHOD FOR SENSING DIAPHRAGM DEFLECTION
BERTHOLD, J.W.; JEFFERS, L.A.
RES. AND DEV. DIV., BABCOCK AND WILCOX CO, ALLIANCE, OH, USA
Sponsor: SPIE
PROC. SPIE INT. SOC. OPT. ENG.SA) VOL.412 90-5 1983 CODEN: PSIDG
ISSN: 0277-786X
FIBER OPTIC AND LASER SENSORS 5-7 APRIL 1983 ARLINGTON, VA, USA
Treatment: PRACTICAL; EXPERIMENTAL
Doc. Type: CONF. PAP.
Lang.: ENG. (8 Refs)
A TECHNIQUE IS DESCRIBED FOR MEASURING THE DISPLACEMENT OF A THIN GLASS DIAPHRAGM RELATIVE TO A FIXED GLASS REFERENCE SURFACE. THE METHOD EMPLOYS A SINGLE-MODE OPTICAL FIBER TO DELIVER COHERENT LIGHT TO THE CENTER OF THE DIAPHRAGM AND REFERENCE SURFACE. THE INTERFERENCE FRINGE PATTERN CAUSED BY PARTIAL REFLECTION OF LIGHT FROM EACH SURFACE IS FOCUSED ONTO A MULTIMODE RECEIVE FIBER, WHICH CONDUCTS THE LIGHT TO A DETECTOR. WHEN THE DIAPHRAGM DEFLECTS, THE FRINGE PATTERN TRAVERSES THE INPUT END OF THE MULTIMODE FIBER CAUSING THE DETECTOR OUTPUT SIGNAL TO FOLLOW A COSINE-SQUARED TIME DEPENDENCE MATCHING THE COSINE-SQUARED SPATIAL DEPENDENCE OF THE FRINGES. APPROPRIATE UP/DOWN COUNTING ELECTRONICS MAY BE USED TO COUNT THE INTERFERENCE FRINGE PEAKS AND CONVERT THE COUNT TO A MEASURE OF DIAPHRAGM DISPLACEMENT. RESULTS OF A PRELIMINARY INVESTIGATION OF THIS DIAPHRAGM DEFLECTION SENSOR ARE PRESENTED. APPLICATION OF THE METHOD TO PRESSURE MEASUREMENT IS DISCUSSED. THE TECHNIQUE IS INHERENTLY INSENSITIVE TO THERMAL DRIFT AND VIBRATION, AND ITS 'ALL GLASS' CONSTRUCTION MAKES IT APPLICABLE TO PRESSURE MEASUREMENTS IN HIGH-TEMPERATURE ENVIRONMENTS.
Desc.: DIAPHRAGMS; LIGHT INTERFEROMETRY; DISPLACEMENT MEASUREMENT; PRESSURE MEASUREMENT; FIBRE OPTICS; PRESSURE TRANSDUCERS
Ident.: FIBRE OPTIC METHOD; DISPLACEMENT MEASUREMENT; DIAPHRAGM DEFLECTION SENSING; ALL GLASS CONSTRUCTION; PRESSURE TRANSDUCERS; THIN GLASS DIAPHRAGM; FIXED GLASS REFERENCE SURFACE; SINGLE-MODE OPTICAL FIBER; COHERENT LIGHT; INTERFERENCE FRINGE PATTERN; PARTIAL REFLECTION; MULTIMODE RECEIVE FIBER; DETECTOR OUTPUT SIGNAL; COSINE-SQUARED TIME DEPENDENCE; COSINE-SQUARED SPATIAL DEPENDENCE; UP/DOWN COUNTING ELECTRONICS; INTERFERENCE FRINGE PEAKS; PRESSURE MEASUREMENT; THERMAL DRIFT; VIBRATION; HIGH-TEMPERATURE ENVIRONMENTS
Class Codes: A4280M; A0630C; A0760L; A0670M; B4130; B7320C; B7320V; B7230

Y027013 52
1232260 A84040349, B84020149
PVF/SUB 2/ POLYMERS: FERROELECTRIC POLARIZATION AND PIEZOELECTRIC PROPERTIES UNDER DYNAMIC PRESSURE AND SHOCK WAVE ACTION
BAUER, F.
INST. FRANCO-ALLEMAND DE RECHERCHES DE SAINT-LOUIS, SAINT-LOUIS, FRANCE
Sponsor: IEEE
FERROELECTRICS (GB) VOL.49, NO.1-4 231-40 NOV. 1983 CODEN: FEROA8
ISSN: 0015-0193
1983 IEEE INTERNATIONAL SYMPOSIUM ON APPLICATIONS OF FERROELECTRICS 1-3 JUNE 1983 GAITHERSBURG, MD, USA
USCCC Code: 0015-0193/83/4901-0231$18.50/0 
Treatment: APPLIC; EXPERIMENTAL
Doc. Type: CONF. PAP.
Lang.: ENG. (12 Refs)
POLYVINYLIDENE FLUORIDE PVF/SUB 2/ PRESENTS A STRONG PIEZOELECTRIC ACTIVITY UNDER SPECIFIC CONDITIONS OF CRYSTALLIZATION AND POLARIZATION. STUDIES OF THE FERROELECTRIC POLARIZATION, OF THE PHYSICAL AND PIEZOELECTRIC CHARACTERISTICS AND OF THE BEHAVIOR OF PVF/SUB 2/ UNDER DYNAMIC PRESSURE ARE OF FUNDAMENTAL INTEREST. THE PIEZOELECTRIC ACTIVITY OF PVF/SUB 2/ DEPENDS ON THE POLARIZATION PROCESS AS IT IS PRESENTED IN THE STUDIES OF THE HYSTERESIS LOOPS P (E) (P: POLARIZATION, E: ELECTRICAL FIELD). THE REMANENT POLARIZATION ATTAINS 10 MUC/CM/SUP 2/ FOR BI-AXIALLY STRETCHED FILMS FROM RHONE POULENC FILMS. RESULTS OBTAINED ON UNIAXIAL STRETCHED FILMS FROM PENNWALT CORPORATION ARE REPORTED. PROPERTIES UNDER STATIC PRESSURE ARE PRESENTED. APPLICATIONS TO BALLISTIC TRANSDUCERS ARE DESCRIBED. THE DYNAMIC BEHAVIOUR OF PIEZOELECTRIC PVF/SUB 2/ UNDER SHOCK WAVE IS SURVEYED. STUDIES OF SHOCK LOADED ELECTRIC ENERGY RELEASED FROM PVF/SUB 2/ FILMS ARE REPORTED. RESULTS WITH PVF/SUB 2/ TRANSDUCERS FOR WEAK OR STRONG SHOCK WAVES AND APPLICATIONS OF PVF/SUB 2/ TO SHOCK PRESSURE PROFILE MEASUREMENTS ARE ALSO REPORTED. INVESTIGATIONS CONDUCTED AT VERY HIGH PRESSURE LEVEL SHOW THE PVF/SUB 2/ TO DELIVER ELECTRICAL PULSES WHICH CAN BE USED IN VIEW OF CHRONOMETRIC RECORDING OF STRONG SHOCK WAVES AND OF SHOCK PRESSURE DETERMINATION. CONCLUSIONS ON THE VARIETY OF POSSIBLE APPLICATIONS ARE GIVEN IN WHICH THE FERROELECTRICS OF PVF/SUB 2/ MAY FIND A WIDESPREAD USE.
Desc.: POLYMERS; FERROELECTRIC MATERIALS; DIELECTRIC POLARISATION; PIEZOELECTRIC MATERIALS; DIELECTRIC HYSTERESIS; SHOCK WAVE EFFECTS; PIEZOELECTRIC TRANSDUCERS
Ident.: POLYVINYLIDENE FLUORIDE; PVF/SUB 2/ POLYMERS; FERROELECTRIC POLARIZATION; PIEZOELECTRIC PROPERTIES; DYNAMIC PRESSURE; SHOCK WAVE ACTION ; CRYSTALLIZATION; HYSTERESIS LOOPS; REMANENT POLARIZATION; BI-AXIALLY STRETCHED FILMS; RHONE POULENC FILMS; BALLISTIC TRANSDUCERS; SHOCK LOADED ELECTRIC ENERGY; SHOCK PRESSURE DETERMINATION; FERROELECTRICS
Class Codes: A7760; A6250; A7730; A7780; A4388; B281?F; B2860; B7810C

Y027013 53
1228544 C84016362
OPTICAL SENSORS IN PLANT INSTRUMENT TECHNOLOGY IN THE CHEMICAL INDUSTRY
RAAB, H.
BASF AG, LUDWIGSHAFEN, GERMANY
TECH. MESS. TM (GERMANY) VOL.50, NO.12 475-9 DEC. 1983 CODEN: TMAMDS
ISSN: 0171-8096
Treatment: APPLIC; PRACTICAL
Doc. Type: JRNL PAP.
Lang.: GERMAN (3 Refs)
THE USE OF OPTOELECTRONIC AND OPTICAL FIBRES IN OPTICAL MEASURING EQUIPMENT IN THE CHEMICAL INDUSTRY HAS A NUMBER OF ADVANTAGES. IT BECOMES APPARENT, ESPECIALLY IN APPLICATION OF SENSOR TECHNOLOGY TO PROCESS ANALYSERS. THREE EXAMPLES OF OPTICAL SENSORS ARE ILLUSTRATED. THE FIRST SENSOR WAS DEVELOPED TO MEASURE LIQUIDS IN THE UV AND VISIBLE SPECTRAL REGIONS DIRECTLY IN A VESSEL. THE SECOND EXAMPLE IS A SENSOR FOR THE DETERMINATION OF WATER IN ORGANIC LIQUIDS. IN A THIRD EXAMPLE IT IS SHOWN THAT BY USING AN OPTICAL SENSOR IT IS POSSIBLE TO REALIZE A VERY RELIABLE QUASI-CONTINUOUS LEVEL MEASUREMENT, WHICH CAN BE USED WITH LEVEL TUBES OR SIGHT GLASSES, ESPECIALLY HIGH-PRESSURE SIGHT GLASSES.
Desc.: NONELECTRIC SENSING DEVICES; CHEMICAL INDUSTRY; FIBRE OPTICS ; LEVEL MEASUREMENT; CHEMICAL VARIABLES MEASUREMENT
Ident.: FIBRE OPTICS; OPTOELECTRONIC SENSORS; CHEMICAL VARIABLES MEASUREMENT; OPTICAL FIBRES; OPTICAL MEASURING EQUIPMENT; CHEMICAL INDUSTRY ; PROCESS ANALYSERS; OPTICAL SENSORS; LEVEL MEASUREMENT
Class Codes: C3350G; C3240F; C3120T; C3120P

Y027013 54
1194542 A84021718
A MODEL INVESTIGATION OF THE VELOCITY AND PRESSURE SPECTRA IN VASCULAR MURMURS
LU, P.C.; HUI, C.N.; HWANG, N.H.C.
CARDIOVASCULAR FLOW DYNAMICS LAB., UNIV. OF HOUSTON, HOUSTON, TX, USA
J. BIOMECH. (GB) VOL.16, NO.11 923-31 1983 CODEN: JBMCB5
ISSN: 0021-9290
USCCC Code: 0021-9290/83$3.00+.00
Treatment: EXPERIMENTAL
Doc. Type: JRNL PAP.
Lang.: ENG. (26 Refs)
A PHYSICAL MODEL CONSISTING OF AN AXISYMMETRICAL JET IN A RIGID PLEXIGLASS PIPE WAS USED TO STUDY THE FLOW AND PRESSURE FLUCTUATIONS DOWNSTREAM FROM AN AORTIC STENOSIS. THE FLUCTUATING VELOCITY COMPONENTS, U AND V, AT SEVERAL LOCATIONS IN THE STEADY LIQUID JET WERE MEASURED USING A LASER DOPPLER ANEMOMETER SYSTEM. SIMULTANEOUS WALL PRESSURE FLUCTUATIONS WERE MONITORED BY AN ARRAY OF NINE MINIATURE PRESSURE TRANSDUCERS WALL MOUNTED IN THE AXIAL DIRECTION. THIS PAPER PRESENTS THE DETAILED MEASUREMENTS OF MEAN VELOCITY PROFILES, TURBULENT INTENSITY DISTRIBUTIONS AND RMS PRESSURE FLUCTUATIONS. THE ENERGY SPECTRA OBTAINED FOR THE PRESSURE FLUCTUATIONS AND THE U AND V VELOCITY COMPONENTS ARE COMPARED. CONTRARY TO EARLIER WORKS, THE AUTHORS FOUND THAT THE DIFFERENCES BETWEEN PEAK FREQUENCIES OF THE PRESSURE SPECTRA AND THE CHARACTERISTIC FREQUENCIES OF THE VELOCITY SPECTRA VARY WITH POSITIONS DOWNSTREAM FROM THE NOZZLE. THESE DIFFERENCES ARE DISCUSSED IN LIGHT OF PSEUDOSOUND GENERATION BY THE EDDY STRUCTURES IN THE STENOTIC FLOW FIELD.
Desc.: HAEMODYNAMICS
Ident.: VELOCITY SPECTRA; PRESSURE SPECTRA; VASCULAR MURMURS; PHYSICAL MODEL; AXISYMMETRICAL JET; RIGID PLEXIGLASS PIPE; AORTIC STENOSIS PEAK FREQUENCIES; PSEUDOSOUND GENERATION; EDDY STRUCTURES; STENOTIC FLOW FIELD
Class Codes: A8745H

Y027013 55
1190385 A84017009
A DEVICE FOR THE CAPACITIVE MEASUREMENT OF PRESSURE DISTRIBUTION WITH HIGH TRANSDUCER DENSITY
BRUNNER, W.; KURZ, B.; DIEBSCHLAG, W.
INST. FUR ARBEITSPHYSIOLOGIE., TECH. UNIV. MUNCHEN, MUNCHEN, GERMANY
BIOMED. TECH. (GERMANY) VOL.28, NO.10 221-4 OCT. 1983 CODEN: BM?TA7
ISSN: 0013-5585
Treatment: PRACTICAL; EXPERIMENTAL
Doc. Type: JRNL PAP.
Lang.: GERMAN (6 Refs)
THE MEASURING DEVICE DESCRIBED PERMITS THE QUANTIFICATION OF PRESSURE DISTRIBUTIONS, E.G. IN ORTHOPEDIC MEDICINE, UNDER THE SOLE OF THE HUMAN FOOT WHILE STANDING, WALKING OR JUMPING. A 3 MM THICK MOBILE FLEXIBLE MAT CONTAINS UP TO 20 PRESSURE TRANSDUCERS/CM/SUP 2/ WORKING ON THE CAPACITIVE MEASURING METHOD. IN CONTRAST TO PREVIOUS SIMILAR DEVICES EMPLOYED BY OTHER INVESTIGATORS, IT YIELDS VERY ACCURATE RESULTS ON THE BASIS OF THE HIGH TRANSDUCER DENSITY AND PRESSURE RESOLUTION. THE RESULTS ENABLE THE PHYSICIAN TO DRAW CONCLUSIONS AS TO THE STRUCTURE AND FUNCTIONAL PERFORMANCE OF THE FEET, AND ALSO AS TO POSTURE AND BIOMECHANICAL KINETICS. AN ONLINE COMPUTER ANALYSIS OF THE MEASURED PRESSURE DATA PROVIDES COLORED PICTURES, GRAPHS AND TABLES, BY MEANS OF WHICH A SIMPLE AND ACCURATE DIAGNOSIS OF FOOT DEFORMITIES BECOMES POSSIBLE.
Desc.: PRESSURE MEASUREMENT; PATIENT DIAGNOSIS; BIOMECHANICS; CAPACITANCE MEASUREMENT; PRESSURE TRANSDUCERS
Ident.: HUMAN FOOT SOLE; FOOT STRUCTURE; FOOT DEFORMITY DIAGNOSIS; CAPACITIVE MEASUREMENT; PRESSURE DISTRIBUTION; HIGH TRANSDUCER DENSITY; PRESSURES DISTRIBUTIONS; ORTHOPEDIC MEDICINE; STANDING; WALKING; JUMPING; 3 MM THICK MOBILE FLEXIBLE MAT; PRESSURE TRANSDUCERS; FUNCTIONAL PERFORMANCE POSTURE; BIOMECHANICAL KINETICS; ONLINE COMPUTER ANALYSIS
Class Codes: A8770E; A8745D

Y027013 56
1177637 A84009301
VIBRATIONAL STRESS/STRAIN EFFECTS OF STRAIGHT AND CURVED HEAT EXCHANGER TUBES, BOTH WITH AND WITHOUT AXIAL STRESS
HEINECKE, E.
KFA JULICH, JULICH, GERMANY
Sponsor: GERMAN ATOMIC FORUM
JAHRESTAGUNG KERNTECHNIK 83 (ANNUAL MEETING OF NUCLEAR TECHNOLOGY 83) 663-6 1983
14-16 JUNE 1983 BERLIN, GERMANY
Publ: DEUTSCHES ATOMFORUM, BONN, GERMANY
XXII+900 pp.
Treatment: PRACTICAL; EXPERIMENTAL
Doc. Type: CONF. PAP.
Lang.: GERMAN (4 Refs)
IN BOTH CURRENT AND PROJECTED GAS-COOLED REACTORS, THE HEAT EXCHANGER TUBES EXPERIENCED TRANSVERSE, LINEAR AND DIAGONAL FLOW PATTERNS. THE RESULTANT MECHANICAL VIBRATION HAS IMPLICATIONS FOR THE LONG-TERM STRUCTURAL INTEGRITY AND SAFETY OF SUCH PLANT. A MONITORING SYSTEM HAS BEEN DEVELOPED TO MEASURE BOTH STATIC AND DYNAMIC FLOW PROPERTIES. MICRO-MINIATURISED PRESSURE TRANSDUCERS ARE USED. EXPERIMENTAL DATA ARE GIVEN. FURTHER RESEARCH IS IN PROGRESS.
Desc.: FISSION REACTOR COOLING AND HEAT RECOVERY; STRESS/STRAIN RELATIONS; FISSION REACTOR SAFETY
Ident.: GCR; STRAIGHT HEAT EXCHANGER TUBES; VIBRATIONAL STRESS/STRAIN EFFECTS; CURVED HEAT EXCHANGER TUBES; AXIAL STRESS; GAS-COOLED REACTORS; DIAGONAL FLOW PATTERNS; MECHANICAL VIBRATION; STRUCTURAL INTEGRITY; SAFETY; MONITORING SYSTEM
Class Codes: A2842Q; A8140L; A?220F; A2843B; A2844; A2850I

Y027013 57
1173024 A84004484, B84003218
APPLIED COHERENT ANTI-STOKES RAMAN SPECTROSCOPY A UTRC
DOBBS, G.M.
UNITED TECHNOL. RES. CENTER, EAST HARTFORD, CT, USA
TRANSDUCER TEMPCON CONF. PAP. 1983 3 PP. 1983
14-16 JUNE 1983 LONDON, ENG.
Publ: TRIDENT INTERNATIONAL EXHIBITIONS, TAVISTOCK, DEVON, ENG.
761 pp.
Treatment: THEORETICAL; EXPERIMENTAL
Doc. Type: CONF. PAP.
Lang.: ENG.
UNITED TECHNOLOGIES RESEARCH CENTER (UTRC) IS APPLYING COHERENT ANTI-STOKES RAMAN SPECTROSCOPY TO DIAGNOSE TEMPERATURE AND SPECIES CONCENTRATIONS IN COMBUSTION SYSTEMS WITH PARTICULAR INTEREST IN THE OPERATION OF PRACTICAL DEVICES. CURRENT CARS RESEARCH PROGRAMS INCLUDE THE STUDY OF SOOT FORMATION PROCESSES IN FLAMES AT PRESSURES OF ONE ATMOSPHERE AND ABOVE, THEORETICAL AND EXPERIMENTAL SPECTROSCOPY OF COMBUSTION SPECIES ARE HIGH PRESSURE, THE DETECTION OF MINOR COMBUSTION SPECIES BUY ELECTRONIC-RESONANCE ENHANCEMENT OF SIGNALS, AND THE USE OF PICOSECOND CARS FOR BACKGROUND SUPPRESSION. STUDY OF FLUCTUATING SYSTEMS REQUIRES INSTANTANEOUS MEASUREMENT OF TEMPERATURE OF SPECIES CONCENTRATION AND THE DETERMINATION OF PROBABILITY DISTRIBUTION FUNCTIONS FOR THREE PARAMETERS. THE DESIGN OF AN APPARATUS WHICH HAS A 20 HZ RECORDING CAPABILITY AND THE ANALYSIS METHOD ARE BRIEFLY DESCRIBED.
Desc.: TEMPERATURE MEASUREMENT; CHEMICAL VARIABLES MEASUREMENT; COMBUSTION; FLAMES
Ident.: TEMPERATURE MEASUREMENT; CHEMICAL VARIABLE MEASUREMENT; COHERENT ANTISTOKES RAMAN SPECTROSCOPY; UTR?; COMBUSTION SYSTEMS; SOOT FORMATION PROCESSES; FLAMES; FLUCTUATING SYSTEMS; PROBABILITY DISTRIBUTION FUNCTIONS; 20 HZ
Class Codes: A0765; A8240P; A8280D; B7320R; B7320T

Y027013 58
1171689 A84000774, B84003040
THERMOCOUPLES IN SPECIALISED HEAT TRANSFER INSTALLATIONS
SALT, K.J.
UKAEA, WINFRITH, ENG.
TRANSDUCER TEMPCON CONF. PAP.S 1983 7 PP. 1983
14-16 JUNE 1983 LONDON, ENG.
Publ: TRIDENT INTERNATIONAL EXHIBITIONS, TAVISTOCK, DEVON, ENG.
761 pp.
Treatment: APPLIC; EXPERIMENTAL
Doc. Type: CONF. PAP.
Lang.: ENG.
THE RESEARCH PROGRAMME AT THE UKAEA ESTABLISHMENT AT WINFRITH INVOLVES EXPERIMENTAL STUDIES OF THE THERMAL PERFORMANCE OF COMPONENTS AND SIMULATED SECTIONS OF A PRESSURISED WATER REACTOR. FOR THIS PURPOSE THE WINFRITH HEAT TRANSFER LABORATORIES CONTAIN AN ASSEMBLY OF LARGE, HIGH PRESSURE, WATER LOOPS AND, IN ORDER THAT GOOD QUALITY DATA MAY BE OBTAINED, THESE RIGS ARE GENEROUSLY INSTRUMENTED AND QUANTITIES OF THERMOCOUPLES ARE INVOLVED. THE AUTHOR PRESENTS A FEW EXAMPLES OF TECHNIQUES WHICH HAVE BEEN USED AND DEVELOPED WHICH ARE PARTICULAR TO THIS FIELD OF WORK, BUT WHICH MAY HAVE APPLICATION IN OTHER AREAS.
Desc.: NUCLEAR REACTOR INSTRUMENTATION; THERMOCOUPLES
Ident.: NUCLEAR REACTOR INSTRUMENTATION; PWR; HEAT TRANSFER INSTALLATIONS; THERMAL PERFORMANCE OF COMPONENTS; PRESSURISED WATER REACTOR ; THERMOCOUPLES
Class Codes: A2843H; A0720; A2850G; B7230; B7320R

Y027013 59
1171659 A83117196, B84003000
TESTING OF STRAIN-GAUGE PRESSURE TRANSDUCERS UP TO 3.5 MPA AT CRYOGENIC TEMPERATURES AND IN MAGNETIC FIELDS UP TO 6 T
CERUTTI, G.; MAGHENZANI, R.; MOLINAR, G.F.
ISTITUTO DI METROLOGIA, NAT. RES. COUNCIL OF ITALY, TORINO, ITALY
CRYOGENICS (GB) VOL.23, NO.10 539-45 OCT. 1983 CODEN: CRYOAX
ISSN: 0011-2275
USCCC Code: 0011-2275/83/010539-07$03.00
Treatment: PRACTICAL; EXPERIMENTAL
Doc. Type: JRNL PAP.
Lang.: ENG. (6 Refs)
THE CHARACTERISTICS OF FOUR COMMERCIAL STRAIN-GAUGE PRESSURE TRANSDUCERS SUITABLE FOR MEASUREMENTS IN A TEMPERATURE RANGE FROM 4.2 TO 293K WERE DETERMINED IN THE PRESENCE OF MAGNETIC FIELDS UP TO 6 T. THE HIGHEST PRESSURE MEASURED WAS 3.5 MPA. TESTS SHOWED THAT IF THE TRANSDUCERS ARE USED IN THESE CONDITIONS AND NO CORRECTIONS ARE MADE, UNCERTAINTIES UP TO 19PERCENT OF THE TRANSDUCER FULL SCALE MAY BE INHERENT IN MEASUREMENTS. WHEN SUCH HIGH ERROR LEVELS ARE UNACCEPTABLE, THE TRANSDUCERS MUST BE INDIVIDUALLY CALIBRATED UNDER THE WORKING CONDITIONS: IN THIS WAY THE UNCERTAINTIES IN PRESSURE MEASUREMENTS CAN USUALLY BE KEPT BELOW 1PERCENT OF THE TRANSDUCER FULL SCALE.
Desc.: STRAIN GAUGES; PRESSURE TRANSDUCERS; LOW-TEMPERATURE TECHNIQUES; CALIBRATION; HIGH-PRESSURE TECHNIQUES
Ident.: CALIBRATION; HIGH PRESSURE; 3.5 MPA; CRYOGENIC TEMPERATURES MAGNETIC FIELDS; 6 T; STRAIN-GAUGE PRESSURE TRANSDUCERS; TRANSDUCERS
Class Codes: A0735; A0720M; A067?D; A0755; A0620H; B7230; B7130; B7320V

Y027013 60
1166926 B83063208, C84000765
SENSORS AND TRANSDUCERS
MCDERMOTT, J.
EDN (USA) VOL.28, NO.16 96-128 4 AUG. 1983 CODEN: EDNSBH
ISSN: 0012-7515
Treatment: APPLIC; PRACTICAL
Doc. Type: JRNL PAP.
Lang.: ENG.
MANUFACTUERS OF SENSORS AND TRANSDUCERS ARE CONTINUING THEIR EFFORTS TO REFINE DESIGNS, TO IMPROVE PERFORMANCE AND TO LOWER COSTS. AS A RESULT OF THESE EFFORTS, THE USE OF SENSORS AND TRANSDUCERS IN INDUSTRIAL, SCIENTIFIC, AEROSPACE, MILITARY, MEDICAL AND CONSUMER APPLICATIONS IS GROWING AT AN EXPANDING RATE. MANY OF THE MANUFACTURERS' EFFORTS ARE REFLECTED IN ADVANCES IN THE SEMICONDUCTOR TECHNOLOGY ASSOCIATED WITH PRESSURE TRANSDUCERS. IN ADDITION, FIRMS ARE MINIATURIZING THEIR PRODUCTS AND PACKAGING MORE OF THE ELECTRONICS INSIDE THE TRANSDUCER ITSELF; SUCH IMPROVEMENTS AND UPGRADING ARE EVIDENT NOT ONLY FOR PRESSURE TRANSDUCERS, BUT ALSO FOR OTHER TYPES.
Desc.: ELECTRIC SENSING DEVICES; PRESSURE TRANSDUCERS
Ident.: SENSORS; TRANSDUCERS; SEMICONDUCTOR TECHNOLOGY; PRESSURE TRANSDUCERS; PACKAGING
Class Codes: B7230; B7320V; C3240D

Y027013 61
1147463 A83112734
NITRITE AND NITRATE IONS AS INFRARED PRESSURE GAUGES OR DIAMOND ANVILS
KLUG, D.D.; WHALLEY, E.
DIV. OF CHEM., NAT. RES. COUNCIL, OTTAWA, CANADA
REV. SCI. INSTRUM. (USA) VOL.54, NO.9 1205-8 SEPT. 1983 CODEN: RSINAK
ISSN: 0034-6748
USCCC Code: 0034-6748/83/091205-04$01.30
Treatment: EXPERIMENTAL
Doc. Type: JRNL PAP.
Lang.: ENG. (14 Refs)
THE INFRARED SPECTRA OF THE ANTISYMMETRIC STRETCHING BANDS OF DILUTE SOLUTIONS OF NITRITE AND NITRATE IONS IN SODIUM BROMIDE ARE PROPOSED AS PRESSURE GAUGES FOR USE WITH ANVILS AND OTHER APPARATUSES. THEIR FREQUENCIES, WHICH ARE AT 1279.0 AND 1401.3 CM/SUP -1/ RESPECTIVELY AT ZERO PRESSURE, WERE MEASURED UP TO 186 KBAR RELATIVE TO THE R/SUB 1/ FLUORESCENCE LINE OF RUBY. THE PRESSURE IS RELATED TO THE SHIFT DELTANU OF THE FREQUENCY OF THE NITRITE ION AT 22 DEGREESC FROM THE ZERO-PRESSURE VALUE BY THE EQUATION RHO/KBAR=2.356 (DELTANU/CM/SUP -1/)-1.334 (DELTANU/CM/- SUP -1/)EXP (-DELTANU/92 CM/SUP -1/), AND TO THE SHIFT DELTANU OF THE FREQUENCY OF THE NITRATE ION BY THE EQUATION RHO/KBAR=1.775 (DELTANU/CM/SUP -1/)-0.7495 (DELTANU/CM/SUP -1/)*EXP (-DELTANU/78 CM/SUP -1/). BOTH EQUATIONS WERE FITTED BY LEAST SQUARES, ASSUMING THAT THE ERROR IS IN THE PRESSURE ONLY, AND THE STANDARD DEVIATION OF THE PRESSURE IS 1.1 AND 1.4 KBAR, RESPECTIVELY.
Desc.: HIGH-PRESSURE TECHNIQUES; PRESSURE TRANSDUCERS; INFRARED SPECTRA OF POLYATOMIC INORGANIC MOLECULES; SPECTRA OF INORGANIC LIQUIDS AND SOLUTIONS
Ident.: NITRITE IONS; ?ABR; NITRATE IONS; INFRARED PRESSURE GAUGES; DIAMOND ANVILS; INFRARED SPECTRA; ANTISYMMETRIC STRETCHING BANDS; DILUTE SOLUTIONS; PRESSURE GAUGES; LEAST SQUARES
Class Codes: A3320E; A0735; A3370J; A7830C; A3580

Y027013 62
114250 A83107195
THE DEPENDENCE OF VISCOELASTIC FLOW PROPERTIES ON THE STRUCTURE FOR STYRENE-BUTADIENE COPOLYMERS
RAMACHANDRAN, S.; CHRISTIANSEN, E.B.
DEPT. OF CHEM. ENG. UNIV. OF UTAH, SALT LAKE CITY, UT, USA
J. NON-NEWTONIAN FLUID MECH. (NETHERLANDS) VOL.13, NO.1 21-32 JULY 1983 CODEN: JNFMDI
ISSN: 0377-0257
Treatment: EXPERIMENTAL
Doc. Type: JRNL PAP.
Lang.: ENG. (21 Refs)
THE FLOW PROPERTIES FOR 300 KG?M/SUP 3/ SOLUTIONS OF FOUR-ARM, STAR-BRANCHED RANDOM AND BLOCK STYRENE-BUTADIENE-STYRENE COPOLYMERS IN N-BUTYLBENZENE ARE PRESENTED. THE VISCOSITY, ZETA, FIRST AND SECOND NORMAL STRESS DIFFERENCES, N/SUB 1/ AND N/SUB 2/, AND THE STEADY SHEAR COMPLIANCE J, WERE DETERMINED AS A FUNCTION OF THE SHEAR RATE FROM CONE-PLATE SHEARING DATA. THE NORMAL STRESS DIFFERENCES WERE DETERMINED FROM TOTAL NORMAL FORCE AND PLATE PRESSURE DISTRIBUTION DATA. FOUR SENSITIVE, MINIATURE, VARIABLE-CAPACITANCE PRESSURE TRANSDUCERS MOUNTED IN THE 7.4-CM PLATE WITH THEIR APPROXIMATELY 2?4 MM IN DIAMETER PRESSURE-SENSING DIAPHRAGMS FLUSH WITH THE PLATE SURFACE PROVIDED DATA FOR THE PRESSURE DISTRIBUTION ON THE PLATE. IN GENERAL, THE DATA EXTEND FROM THE ZERO SHEAR-RATE VISCOSITY REGION SOMEWHAT INTO THE SHEAR THINNING REGION.
Desc.: VISCOELASTICITY; POLYMERS; NON-NEWTONIAN FLOW; SHEAR FLOW
Ident.: FOUR ARM STAR BRANCHED COPOLYMERS; BLOCK COPOLYMERS; RANDOM STYRENE-BUTADIENE-STYRENE COPOLYMERS; VISCOELASTIC FLOW PROPERTIES; STYRENE-BUTADIENE COPOLYMERS; VISCOSITY; NORMAL STRESS DIFFERENCES; STEADY SHEAR COMPLIANCE; CONE-PLATE SHEARING; TOTAL NORMAL FORCE; PLATE PRESSURE DISTRIBUTION; VARIABLE-CAPACITANCE PRESSURE TRANSDUCERS; PRESSURE-SENSING DIAPHRAGMS; ZERO SHEAR-RATE VISCOSITY REGION; SHEAR THINNING REGION
Class Codes: A4750; A4660B

Y027013 63
1140702 A83105372, B83056782
INFRARED SENSOR FOR REMOTE TEMPERATURE MONITORING OF SOLAR THERMAL CENTRAL RECEIVERS
WARREN, D.W.
AEROSPACE CORP., LOS ANGELES, CA, USA
PROC. SPIE INT. SOC. OPT. ENG.SA) VOL.366 112-21 1983 CODEN: PSISDG
ISSN: 0277-786X
MODERN UTILIZATION OF INFRARED TECHNOLOGY VIII 26-27 AUG. 1982 SAN DIEGO, CA, USA
Treatment: APPLIC; EXPERIMENTAL
Doc. Type: CONF. PAP.
Lang.: ENG.
AT THE BARSTOW 10 MW SOLAR THERMAL PILOT PLANT, WATER IS CONVERTED TO HIGH PRESSURE STEAM BY CONCENTRATED SOLAR RADIATION. THE DESIGN OF THE ELEMENTS IN WHICH THE BOILING TAKES PLACE MAKES THEM VULNERABLE TO BLOCKAGE BY PARTICULATES CONTAMINATING THE CIRCULATING WATER. CONCERN OVER THE POTENTIAL FOR HEAT DAMAGE TO BLOCKED BOILER ELEMENTS HAS LED TO THE DEVELOPMENT OF A REMOTE OPTICAL MONITORING SYSTEM FOR USE AT THE PILOT PLANT. THE SYSTEM EMPLOYS A TELESCOPE AND INFRARED VIDICON TO DETECT THE INCREASED BLACKBODY RADIANT EMITTANCE PRODUCED BY AN OVERHEATED ELEMENT. IN IMAGE IS PROVIDED WITH SPATIAL AND THERMAL RESOLUTION SUFFICIENT TO DETECT AND IDENTIFY A SINGLE BLOCKED ELEMENT. DESIGN CONSIDERATIONS FOR SUCH A SYSTEM ARE DISCUSSED, AS ARE PERFORMANCE AT THE PILOT PLANT AND POSSIBLE EXTENSIONS OF THE SYSTEM TO MORE SOPHISTICATED PYROMETRIC TASKS.
Desc.: INFRARED DETECTORS; INFRARED IMAGING; SOLAR POWER STATIONS; TEMPERATURE MEASUREMENT; TELEMETERING SYSTEMS
Ident.: IR SENSOR; SPATIAL RESOLUTION; REMOTE TEMPERATURE MONITORING ; SOLAR THERMAL CENTRAL RECEIVERS; BARSTOW 10 MW SOLAR THERMAL PILOT PLANT CONCENTRATED SOLAR RADIATION; HEAT DAMAGE; BLOCKED BOILER ELEMENTS; REMOTE OPTICAL MONITORING SYSTEM; TELESCOPE; INFRARED VIDICON; BLACKBODY RADIANT EMITTANCE; THERMAL RESOLUTION; PYROMETRIC TASKS
Class Codes: A0762; A8610K; A0720K; B7210D; B7230C; B7320R; B7210F

Y027013 64
1130903 A83103918
IN VITRO CONTACT STRESS DISTRIBUTIONS IN THE NATURAL HUMAN HIP
BROWN, T.D.; SHAW, D.T.
DEPT. OF ORTHOPAEDIC SURGERY, UNIV. OF PITTSBURGH, PITTSBURGH, PA, USA
J. BIOMECH. (GB) VOL.16, NO.6 373-84 1983 CODEN: JBMCB5
ISSN: 0021-9290
USCCC Code: 0021-9290/83$3.00+.00
Treatment: EXPERIMENTAL
Doc. Type: JRNL PAP.
Lang.: ENG. (32 Refs)
TIME VARIANT DISTRIBUTIONS OF INTRA-ARTICULAR CONTACT STRESS WERE ASSEMBLED FROM DIRECT MEASUREMENT IN SEVENTEEN GROSSLY NORMAL FRESH CADAVERIC HIPS. LOCAL STRESSES WERE SENSED BY ARRAYS OF 24 COMPLIANT MINIATURE TRANSDUCERS INSET SUPERFICIALLY IN THE FEMORAL HEAD CARTILAGE. LOCAL CONTACT STRESS MAGNITUDE WAS USUALLY FOUND TO RISE NEARLY LINEARLY WITH APPLIED JOINT LOADS IN EXCESS OF ABOUT 1000 N. THE SITES OF MAXIMUM LOCAL STRESS WERE FOUND TO UNDERLIE THE GENERAL REGION OF THE ACETABULAR DOME. FOR A RESULTANT JOINT LOAD OF 2700 N, THE SPATIAL MEAN CONTACT STRESS AND PEAK LOCAL CONTACT STRESS AVERAGED 2.92 MN M/SUP -2/ AND 8.80 MN M/SUP -2/, RESPECTIVELY, FOR THE 68 LOADING CYCLES ANALYSED. THE FULL CONTACT STRESS PATTERNS WERE IRREGULAR AND COMPLEX, BUT MOST COMMONLY THE GENERAL FEATURE WAS A CENTRAL BAND OR 'RIDGE' OF PRESSURE ELEVATION, ORIENTED IN AN APPROXIMATELY ANTERIOR-TO-POSTERIOR DIRECTION.
Desc.: BONE; BIOMECHANICS
Ident.: IN VITRO CONTACT STRESS DISTRIBUTIONS; HIP BIOMECHANICS; NATURAL HUMAN HIP; GROSSLY NORMAL FRESH CADAVERIC HIPS; MAXIMUM LOCAL STRESS; ACETABULAR DOME; JOINT LOAD
Class Codes: A8745

Y027013 65
1121126 A83093046, B83052109
TECHNIQUE FOR MEASURING ULTRASONIC VELOCITY AND ATTENUATION SPECTRA IN ROCKS UNDER PRESSURE
WINKLER, K.W.; PLONA, T.J.
SCHLUMBERGER-DOLL RES., RIDGEFIELD, CT, USA
J. GEOPHYS. RES. (USA) VOL. 7, NO.B13 10776-80 10 DEC. 1982 CODEN: JGREA2
ISSN: 0148-0227
USCCC Code: 0148-0227/82/002B-1582$05.00
Treatment: PRACTICAL
Doc. Type: JRNL PAP.
Lang.: ENG. (18 Refs)
AN ULTRASONIC PULSE TECHNIQUE HAS BEEN DEVELOPED FOR MEASURING PHASE VELOCITY AND ATTENUATION SPECTRA IN ROCKS INSIDE A PRESSURE VESSEL. THIS TECHNIQUE HAS BEEN ADAPTED FROM THOSE USED IN THE NONDESTRUCTIVE EVALUATION FIELD. IN ESSENCE, A BROADBAND ACOUSTIC PULSE IS DIRECTED INTO A LUCITE BUFFER, WHICH IS FOLLOWED BY THE ROCK SAMPLE AND ANOTHER LUCITE BUFFER. THE PULSE PARTIALLY REFLECTS OFF BOTH THE FRONT AND BACK FACES OF THE SAMPLE, AND THE REFLECTED PULSES ARE RECEIVED BY THE TRANSMITTING TRANSDUCER. DIGITAL RECORDING AND SIGNAL PROCESSING TECHNIQUES ARE USED TO ANALYZE THE SIGNAL. AFTER FOURIER TRANSFORMING EACH PULSE, CORRECTING FOR DIFFRACTION EFFECTS, AND ALLOWING FOR PARTIAL REFLECTIONS AT THE INTERFACES, THE PHASE SHIFT BETWEEN PULSES AT EACH FREQUENCY YIELDS THE PHASE VELOCITY AND THE AMPLITUDE REDUCTION GIVES THE ATTENUATION.
Desc.: GEOPHYSICAL TECHNIQUES; ROCKS; ULTRASONIC VELOCITY MEASUREMENT; ULTRASONIC MEASUREMENT; ULTRASONIC ABSORPTION; HIGH-PRESSURE TECHNIQUES
Ident.: ROCK; MEASUREMENT; METHOD; ABSORPTION; ACOUSTIC PROPERTY; HIGH PRESSURE; ULTRASONIC VELOCITY; ATTENUATION; PULSE TECHNIQUE; PHASE VELOCITY; PRESSURE VESSEL; ACOUSTIC PULSE; LUCITE BUFFER
Class Codes: A9385; A9160; A4385; B7710; B7810; B7820

Y027013 66
1120740 B83051687
A NEW GENERATION OF HIGH ACCURACY PRESSURE TRANSMITTERS EMPLOYING A NOVEL TEMPERATURE COMPENSATION TECHNIQUE
BRYZEK, J.
FOXBORO/ICT, SAN JOSE, CA, USA
WESCON/81 CONFERENCE RECORD 15/4/1-10 1981
15-17 SEPT. 1981 SAN FRANCISCO, CA, USA
Publ: ELECTRON. CONVENTIONS, EL SEGUNDO, CA, USA
1206 pp.
Treatment: NEW DEVELOPMENTS; PRACTICAL
Doc. Type: CONF. PAP.
Lang.: ENG. (6 Refs)
PRESENTS PROBLEM RELATED TO THE TEMPERATURE COMPENSATION OF SEMICONDUCTOR INTEGRATED PIEZORESISTIVE PRESSURE SENSORS. A SIMPLIFIED DESIGN OF AN INTEGRATED SENSOR IS SHOWN. TEMPERATURE CHARACTERISTICS OF PIEZORESISTIVE SENSORS ARE DISCUSSED. A PRINCIPLE OF A PASSIVE TEMPERATURE COMPENSATION TECHNIQUE IS INTRODUCED. A NEW APPROACH IS PRESENTED, IN WHICH THE INTEGRATED PRESSURE SENSOR IS USED SIMULTANEOUSLY AS A PRESSURE AND A TEMPERATURE SENSOR. ELECTRONIC CIRCUITRY, USING DISCONTINUOUS TEMPERATURE CONTROLLED FEEDBACK, PROCESSES THE TEMPERATURE AND PRESSURE SIGNALS TO DECREASE TEMPERATURE ERRORS INHERENT IN SEMICONDUCTOR PRESSURE SENSORS. A SATURATION OF AN OPERATIONAL AMPLIFIER IS USED TO DISCONTINUE THE ACTIVE FEEDBACK LOOP. TEST RESULTS OF A TWO-WIRE PRESSURE TRANSMITTER EMPLOYING THIS NOVEL TEMPERATURE COMPENSATION TECHNIQUE SHOW 0.3PERCENT TOTAL ERROR BAND OVER -40 DEGREESC TO 125 DEGREESC TEMPERATURE RANGE. THIS REPRESENTS ALMOST A 10-FOLD IMPROVEMENT OF PRESENT STATE OF THE ART. A NEW DEFINITION OF TRANSMITTER'S SPECIFICATION IS RECOMMENDED.
Desc.: PRESSURE TRANSDUCERS; COMPENSATION; PIEZOELECTRIC TRANSDUCERS; SILICON; ELEMENTAL SEMICONDUCTORS
Ident.: PRESSURE TRANSDUCERS; IC SENSORS; HIGH ACCURACY PRESSURE TRANSMITTERS; TEMPERATURE COMPENSATION; PIEZORESISTIVE PRESSURE SENSORS; INTEGRATED PRESSURE SENSOR; SEMICONDUCTOR PRESSURE SENSORS
Class Codes: B7230; B7220; B7320V; B2520C; B2860

Y027013 67
1120738 A83089130, B83051685
WHY TIN ACCELEROMETERS AND PRESSURE TRANSDUCERS
TRANSDUCER TECHNOL. (GB) VOL.4, NO.4 12-13 JUNE 1982 CODEN: T?ECDX
ISSN: 0143-7275
Treatment: APPLIC
Doc. Type: JRNL PAP.
Lang.: ENG.
SEMICONDUCTOR SENSING TECHNIQUES HAVE ENABLED DESIGNERS TO MINIATURISE WHILE MAINTAINING QUALITY AND PERFORMANCE. THE SMALL SIZE OF ACCELEROMETERS SUCH AS ENTRAN'S EGA AND EGAX SERIES IS AN OBVIOUS ADVANTAGE WHEN WORKING WITH VERY SMALL STRUCTURES, OR FRACTIONAL SCALE MODELS IN RESEARCH APPLICATIONS. ENTRAN'S RANGE OF DIFFUSED SILICON AND STAINLESS STEEL DIAPHRAGM PIEZORESISTIVE DEVICES ARE AMONG THE SMALLEST AVAILABLE IN THE WORLD. TRANSDUCERS SUCH AS THE EPI SERIES AS SMALL AS 1.27 MM DIAMETER WHICH WILL MEASURE BOTH STATIC (DC) AND DYNAMIC PRESSURES UP TO 200 KHZ, ARE AVAILABLE IN PRESSURE RANGES UP TO 500 PSI. THE VERY SMALL SIZE OF THE DIAPHRAGM MEANS THAT MEASUREMENTS APPROACHING POINT PRESSURES ARE POSSIBLE, WHILE ALSO CREATING MINIMUM IMPEDANCE IN FLOW FIELDS.
Desc.: ACCELEROMETERS; ELECTRIC SENSING DEVICES; PRESSURE MEASUREMENT; PIEZOELECTRIC TRANSDUCERS
Ident.: SEMICONDUCTOR MINIATURE SENSORS; ENTRAN; DIFFUSED SI; ACCELEROMETERS; PRESSURE TRANSDUCERS; EGA; EGAX; STAINLESS STEEL DIAPHRAGM PIEZORESISTIVE DEVICES; EPI
Class Codes: A0670D; A0630G; A0670M; B7230; B7320V; B7320E

Y027013 68
1120731 A8089127, B83051677
SENSORS BASED ON SILICON PLANAR TECHNOLOGY. II
SCHOPPNIES, E.
RADIO FERNSEHEN ELEKTRON. (GERMANY) VOL.32, NO.4 226-8 1983 CODEN: RFELB6
ISSN: 0033-7900
Treatment: APPLIC; GENERAL, REVIEW
Doc. Type: JRNL PAP.
Lang.: GERMAN (19 Refs)
FOR PT.I SEE IBID., VOL.32, NO.3, P.159 (1983). CONTINUES WITH REFERENCE TO MICROMECHANICAL SENSORS WHERE MECHANICAL PROPERTIES OF SILICON BASED MEMBRANE OR TONGUE STRUCTURES ARE USED FOR MEASUREMENTS SUCH AS PRESSURE, FORCE AND ACCELERATION. TYPICAL CONSTRUCTIONS ARE ILLUSTRATED. QUANTITY, MOISTURE AND CHEMICAL SENSORS ARE DESCRIBED AND SOME BASIC CONFIGURATIONS ARE SHOWN. CHEMICAL SENSORS ARE USED IN ION AND GAS ANALYSIS, AND FOR HUMIDITY, QUANTITY AND OTHER MEASUREMENTS, ONE TECHNIQUE BEING LIQUID OR GAS FLOW DETERMINATION BY HEATED ELEMENT COOLING IN A FLOW STREAM. HUMIDITY SENSORS SHOW RELATED CONDUCTIVITY AND CAPACITANCE CHANGES. ION SENSITIVE FIELD EFFECT TRANSISTORS MEASURE ION CONCENTRATION, AND A CLARK CELL CONSTRUCTION SERVES AS A MINIATURE OXYGEN SENSOR, FOR EXAMPLE FOR MONITORING OXYGEN CONTENT OF BLOOD. OPTICAL SENSORS OF VARIOUS KINDS AND THEIR APPLICATIONS ARE REVIEWED. CHARGE COUPLED DEVICES ARE SUITABLE FOR IMAGE RELATED APPLICATIONS INCLUDING ELECTRONIC CHARACTER RECOGNITION, FACSIMILE, AND CAMERA RANGE FINDING. CHARACTERISTICS AND APPLICATIONS OF SOME SOLID STATE IMAGE SENSORS ARE TABULATED. A CONSTANTLY INCREASING NEED EXISTS FOR CHEAP SENSORS WITH SUITABLE SENSITIVITY, AND TRENDS INCLUDE INTELLIGENT SENSORS, INTEGRATION WITH DIGITAL PROCESSING, AND POTENTIALITIES OF NEW MATERIALS.
Desc.: ELECTRIC SENSING DEVICES; MONOLITHIC INTEGRATED CIRCUITS; NONELECTRIC SENSING DEVICES; IMAGE SENSORS
Ident.: HUMIDITY SENSORS; O/SUB 2/ SENSOR; SI PLANAR TECHNOLOGY; CCD ; OPTICAL SENSORS; MICROMECHANICAL SENSORS; MEMBRANE; TONGUE STRUCTURES; PRESSURE; FORCE; ACCELERATION; CHEMICAL SENSORS; GAS FLOW; HEATED ELEMENT COOLING; CONDUCTIVITY; CAPACITANCE; FIELD EFFECT TRANSISTORS; ION CONCENTRATION; CLARK CELL; ELECTRONIC CHARACTER RECOGNITION; FACSIMILE; CAMERA RANGE FINDING; SOLID STATE IMAGE SENSORS; INTELLIGENT SENSORS; DIGITAL PROCESSING
Class Codes: A0670D; B7230; B2570

Y027013 69
1120691 B83051636
IMPROVED GAUGE HIGH PRESSURE SENSOR
HO, R.; MAGLIC, R.
MOTOROLA INC., SCHAUMBURG, IL, USA
MOTOROLA TECH. DEV. (USA) VOL.3 43-4 MARCH 1983 CODEN: MTDEDP
Treatment: PRACTICAL
Doc. Type: JRNL PAP.
Lang.: ENG.
AN IMPROVED GAUGE (DIFFERENTIAL AMBIENT TO UNKNOWN) HIGH PRESSURE SENSOR IS DESCRIBED. A DIAPHRAGM ACTS AS A DISPLACEABLE FIRST CAPACITIVE ELECTRODE AND A SECOND FIXED POSITION CAPACITIVE ELECTRODE IS MOUNTED ON A LIGHTWEIGHT INSULATING CAP. THE PRIMARY CHANNEL AND A SECONDARY CHANNEL PROVIDE A PRESSURE PATH SUCH THAT AMBIENT PRESSURE WILL BE PRESENT IN A FIRST CAVITY FORMED BETWEEN THE UPPER HOUSING AND THE DIAPHRAGM. AN UNKNOWN PRESSURE IS APPLIED TO A SECOND CAVITY IN THE SENSOR THROUGH A PRESSURE INLET AND RESULTS IN PREDETERMINED DEFLECTION OF THE DIAPHRAGM SUCH THAT THE CAPACITANCE BETWEEN THE ELECTRODES IS ALTERED IN ACCORDANCE WITH THE DIFFERENTIAL PRESSURE DIFFERENCE BETWEEN THE PRESSURES IN THE CAVITIES.
Desc.: PRESSURE TRANSDUCERS; ELECTRIC SENSING DEVICES
Ident.: DISPLACEABLE CAPACITIVE ELECTRODE; HIGH PRESSURE SENSOR; IMPROVED GAUGE; DIAPHRAGM; PRESSURE PATH; AMBIENT PRESSURE; DIFFERENTIAL PRESSURE
Class Codes: B7230; B7320V

Y027013 70
1106298 A83084459, B83045911
HIGH-SENSITIVITY DILATOMETER FOR HIGH-PRESSURE INVESTIGATIONS
ZISMAN, A.N.; KACHINSKII, V.N.
INST. OF CRYSTALLOGRAPHY, ACAD. OF SCI., MOSCOW, USSR
PRIB. AND TEKH. EKSP. (USSR) VOL.25, NO.5 172-5 SEPT.-OCT. 1982 CODEN: PRTEAJ
ISSN: 0032-8162
Trans in: INSTRUM. AND EXP. TECH. (USA) VOL.25, NO.5, PT.2 1245-9 SEPT.-OCT. 1982 CODEN: INET?K
ISSN: 0020-4412
Treatment: APPLIC; PRACTICAL
Doc. Type: JRNL PAP.
Lang.: ENG. (8 Refs)
THE UNIVERSAL HIGH-SENSITIVITY DILATOMETER WITH A CAPACITIVE DISPLACEMENT TRANSDUCER DESCRIBED PERMITS INVESTIGATIONS TO BE CONDUCTED ON SMALL SPECIMENS OVER A WIDE RANGE OF TEMPERATURES AND PRESSURES. THE RESOLUTION OF THE DILATOMETER IS =1 NM.
Desc.: HIGH-PRESSURE TECHNIQUES; EXTENSOMETERS
Ident.: HIGH-PRESSURE TECHNIQUES; EXTENSOMETER; HIGH-SENSITIVITY DILATOMETER; CAPACITIVE DISPLACEMENT TRANSDUCER
Class Codes: A0670M; A0630; A0735; B7230; B7320C

Y027013 71
1104989 B83046146
HIGH TEMPERATURE AND HIGH PRESSURE PH SENSORS WITH SPUTTERED IRIDIUM OXIDE FILMS
KATSUBE, T.; LAUKS, I.R.; VAN DER SPIEGEL, J.; ZEMEL, J.N.
DEPT. OF ELECTRONICS, SAITAMA UNIV., URAWA, JAPAN;
JPN. J. APPL. PHYS. SUPPL. (JAPAN) 469-72 1982 CODEN: JJPYA5
ISSN: 0021-4922
PROCEEDINGS OF THE 14TH CONFERENCE (1982 INTERNATIONAL) ON SOLID STATE DEVICES 24-26 AUG. 1982 TOKYO, JAPAN
Treatment: PRACTICAL; EXPERIMENTAL
Doc. Type: CONF. PAP.
Lang.: ENG. (12 Refs)
SPUTTERED IRIDIUM OXIDE FILMS (SIROF) ARE INVESTIGATED AS PH SENSITIVE MEMBRANES TO BE USED IN AQUEOUS SOLUTIONS IN WIDE RANGE OF TEMPERATURE AND PRESSURE. THE TEMPERATURE DEPENDENCE OF THE PH RESPONSE OF SIROF IS ALMOST EQUAL TO THE NERNSTIAN THEORETICAL VALUE OF .303 KT/Q IN THE TEMPERATURE RANGE BETWEEN 0-100 DEGREESC. THE LONG TERM STABILITY OF THE PH RESPONSE AND THE INFLUENCE OF VARIOUS ION INTERFERENCES SEEMS TO BE IN AN ACCEPTABLE RANGE FOR PRACTICAL USE. SIROF IS ALSO FOUND TO BE STABLE IN HIGH TEMPERATURE AND HIGH PRESSURE WATER UP TO 200 DEGREESC AND 4000 PSI. BY USING SIROF AS AN ION SENSITIVE MEMBRANE COMBINED WITH A METAL SILICIDE COATING AS A BARRIER LAYER, THE ICD (ION CONTROLLED DIODE) IS SHOWN TO BE A PROMISING CANDIDATE AS A HIGH TEMPERATURE AND HIGH PRESSURE PH SENSOR.
Desc.: SPUTTERED COATINGS; ELECTRIC SENSING DEVICES; PH MEASUREMENT ; IRIDIUM COMPOUNDS
Ident.: SPUTTERED IRO/SUB X/ FILMS; HIGH TEMPERATURE PH SENSOR; HIGH PRESSURE PH SENSORS; PH SENSITIVE MEMBRANES; TEMPERATURE DEPENDENCE; LONG TERM STABILITY; ION SENSITIVE MEMBRANE; METAL SILICIDE COATING; ION CONTROLLED DIODE
Class Codes: B7320T; B7230

Y027013 72
1094742 A83078672
A RETARDING POTENTIAL ANALYSER FOR ROCKET EXPERIMENTS
KIROV, B.; GEORGIEVA, K.; APOSTOLOV, T.; GUSHEVA, M.; KUTIEV, I.; CHAPKUNOV, S.; SIMEONOVA, YU.
CENTRAL LAB. FOR SPACE RES., BULGARIAN ACAD. OF SCI. SOFIA, BULGARIA;
ADV. SPACE RES. (GB) VOL.2, NO.7 89-92 1982 CODEN: ASRSDW
ISSN: 0273-1177
Treatment: APPLIC; PRACTICAL
Doc. Type: JRNL PAP.
Lang.: ENG. (4 Refs)
A RETARDING POTENTIAL ANALYZER IS DESIGNED USING A MICRO-CHANNEL PLATE IN FRONT OF THE COLLECTOR AS A FLOW AMPLIFIER, WHICH MAKES IT POSSIBLE TO DETECT ION SPECIES WITH VERY LOW CONCENTRATION (<0.5 CM/SUP -3/). A TECHNIQUE IS DESCRIBED FOR USING THE MICRO-CHANNEL PLATE AT ABNORMALLY HIGH PRESSURE (>0.01 N/M/SUP 2/). THIS ALLOWS THE PRECISE DETERMINATION OF THE MASS COMPOSITION OF THE LOW IONOSPHERE. AN ADAPTIVE RETARDING POTENTIAL CONSISTING OF 2048 STEPS IS USED TO INCREASE THE SENSITIVITY. THE SENSOR IS HERMETICALLY SEALED AND OPENS ON COMMAND.
Desc.: ATMOSPHERIC MEASURING APPARATUS; IONOSPHERE
Ident.: MICROCHANNEL PLATE DETECTOR; RETARDING POTENTIAL ANALYSER; ROCKET EXPERIMENTS; MASS COMPOSITION; LOW IONOSPHERE
Class Codes: A9385; A9420

Y027013 73
1092182 A83075975
POLYMER MELT RHEOLOGY WITH A SLIT DIE
LAUN, H.M.
KUNSTSTOFFLAB., BASF AKTIENG.LSCHAFT, LUDWIGSHAFEN/RHEIN, GERMANY
RHEOL. ACTA (GERMANY) VOL.22, NO.2 171-85 MARCH-APRIL 1983 CODEN: RHEAAK
ISSN: 0035-4511
Treatment: EXPERIMENTAL
Doc. Type: JRNL PAP.
Lang.: ENG. (18 Refs)
A PISTON DRIVE HIGH PRESSURE SLIT DIE RHEOMETER WITH THREE PRESSURE HOLES ALONG THE DIE AND ONE IN THE BARREL WAS USED TO INVESTIGATE VISCOSITY, ENTRANCE AND EXIT PRESSURE LOSSES, AND PRESSURE COEFFICIENT OF VISCOSITY OF A LDPE (LOW DENSITY POLYETHYLENE) MELT. HYDROSTATIC CALIBRATION OF MELT PRESSURE TRANSDUCERS CAN BE PERFORMED IN THE RHEOMETER. THE SLIT DIE RESULTS ARE COMPARED WITH MEASUREMENTS ON CIRCULAR DIES ASSUMING LINEAR AND PARABOLIC PRESSURE PROFILES IN BOTH CASES. A SIMPLIFIED CONVERSION FROM APPARENT TO TRUE VISCOSITY, APPLICABLE FOR SINGLE POINT MEASUREMENTS, HAS BEEN USED. IN SPITE OF THE DIFFERENT SYMMETRIES THE BAGLEY CORRECTION FROM THE LINEAR PRESSURE PROFILE OF CIRCULAR DIES WAS FOUND TO BE EQUAL TO THE SUM OF EXIT AND ENHANCE PRESSURE LOSSES IN THE SLIT. THE MAGNITUDE AND SIGN OF THE EXIT PRESSURE LOSS DEPEND ON THE TYPE OF PRESSURE PROFILE USED. THE INFLUENCE OF A PRESSURE DEPENDENT VISCOSITY AND A TEMPERATURE GRADIENT ALONG THE DIE ON THE CURVATURE OF THE PRESSURE PROFILE IS DISCUSSED. TO DIRECTLY INVESTIGATE THE EFFECT OF PRESSURE THE PRESSURE LEVEL AT CONSTANT LOW RATE WAS INCREASED STEPWISE BY MEANS OF A VALVE ATTACHED TO THE EXIT OF THE SLIT DIE.
Desc.: RHEOLOGY; POLYMER MELTS
Ident.: HYDROSTATIC CALIBRATION; POLYMER MELT RHEOLOGY; LOW DENSITY POLYETHYLENE MELT; SLIT DIE RHEOMETER; VISCOSITY; ENTRANCE; PRESSURE LOSSES ; PRESSURE COEFFICIENT; VISCOSITY; MELT PRESSURE TRANSDUCERS; CIRCULAR DIES ; PRESSURE PROFILES; VISCOSITY; PRESSURE LOSSES; PRESSURE DEPENDENT VISCOSITY; TEMPERATURE GRADIENT; FLOW RATE
Class Codes: A4660F

Y027013 74
1090732 A83074430, B83041055
ON THE SENSITIVE AND WIDE FREQUENCY RANGE MEASUREMENT OF PRESSURE
TANAKA, Y.; MASUDA, M.; SHIMAMOTO, Y.
DEPT. OF APPL. MECH., OKAYAMA UNIV., OKAYAMA CITY, JAPAN
BULL. JSME (JAPAN) VOL.26, NO.213 364-71 MARCH 1983 CODEN: BJSEA8
ISSN: 0021-3764
Treatment: PRACTICAL
Doc. Type: JRNL PAP.
Lang.: ENG. (10 Refs)
THE AUTHORS PRESENT ANALYSING METHODS OF THE RESPONSE CHARACTERISTICS NECESSARY FOR DESIGNING A MINIATURE PRESSURE DETECTOR OF CAPACITANCE TYPE AND ELECTRONIC METHODS FOR REALIZING A SENSITIVE AND WIDE-BAND MEASUREMENT OF PRESSURE. SEVERAL DETECTORS, A TRANSDUCER AND AN AMPLIFIER ARE PREPARED WITH THE OBJECT OF EXAMINING THE ADAPTABILITY AND PRACTICALITY OF THESE METHODS. DYNAMIC MEASUREMENT AND STATIC COMPARATIVE TEST BETWEEN THE PRESENT DEVICE AND OTHER HIGH-SENSITIVE PRESSURE MEASURING METHODS SHOW THAT THE ANALYSIS CAN WELL EXPRESS THE DETECTOR RESPONSE TO PRESSURE AND THAT THE PRESENT METHOD ENABLES MEASUREMENTS MORE SENSITIVE THAN THE RESOLUTION OF 0.002 MMAQ (0.02 PA).
Desc.: PRESSURE MEASUREMENT; PRESSURE TRANSDUCERS; FREQUENCY RESPONSE; SENSITIVITY
Ident.: SENSITIVE MEASUREMENT; PRESSURE MEASUREMENT; WIDE FREQUENCY RANGE MEASUREMENT; RESPONSE CHARACTERISTICS; MINIATURE PRESSURE DETECTOR; CAPACITANCE TYPE; ELECTRONIC METHODS; TRANSDUCER; AMPLIFIER
Class Codes: A0630; A4780; A0670M; B7320V; B7230

Y027013 75
1089380 A83064894, B83040861
MEASUREMENT OF LOW OXYGEN PRESSURES WITH A SOLID-STATE ELECTROLYTE MINIATURISED SENSOR
GUTIERREZ MONREAL, F.J.; VITTER, G.
INST. DE ELECTRONICA DE COMUNICACIONES, CSIC, MADRID, SPAIN
J. PHYS. E (GB) VOL.16, NO.5 361-4 MAY 1983 CODEN: JPSIAE
ISSN: 0022-3735
Treatment: APPLIC; PRACTICAL; EXPERIMENTAL
Doc. Type: JRNL PAP.
Lang.: ENG. (7 Refs)
AN ELECTROCHEMICAL GAUGE WITH INTERNAL REFERENCE IS APPLIED FOR MEASURING PARTIAL OXYGEN PRESSURES. THIS DEVICE HAS BEEN APPLIED TO MEASURE THE OXYGEN COMING FROM THE H/SUB 2/+/SUP 1///SUB 2/O/SUB 2/=H/SUB 2/O REACTION, MADE AT LOW OXYGEN PRESSURES DOWN TO 10/SUP -39/ ATMOSPHERES (=10/SUP -34/PA). THE RESULTS SHOWED THAT THE ACCURACIES OBTAINED WERE ABOUT 1.5PERCENT BETWEEN THE MEASURED VALUES AND THE THEORETICAL ONES. THE SCHEME OF THE GAUGE AND ITS METHOD OF CALIBRATION IS ALSOJ PRESENTED, TAKING ACCOUNT OF THE FACT THAT THE INTERNAL REFERENCE ALLOWS THE MEASUREMENT OF SUCH LOW OXYGEN PRESSURES.
Desc.: ELECTRIC SENSING DEVICES; PRESSURE MEASUREMENT; CHEMICAL VARIABLES MEASUREMENT; OXYGEN
Ident.: PARTIAL PRESSURE MEASUREMENT; O/SUB 2/ PRESSURE MEASUREMENT CHEMICAL VARIABLES MEASUREMENT; SOLID-STATE ELECTROLYTE MINIATURISED SENSOR ; ELECTROCHEMICAL GAUGE; 10/SUP -34/PA; CALIBRATION
Class Codes: A0670D; A0630; A8280F; A0730; B7230; B7320V; B7320T

Y027013 76
1084971 A83070047, C83026476
A HIGH-PRESSURE REGULATOR
ZISMAN, A.N.; KACHINSKII, V.N.
INST. OF CRYSTALLOGRAPHY, ACAD. OF SCI., MOSCOW, USSR
PRIB. AND TEKH. EKSP. (USSR) VOL.25, NO.4 232-3 JULY-AUG. 1982 CODEN: PRTEAJ
ISSN: 0032-8162
Trans in: INSTRUM. AND EXP. TECH. (USA) VOL.25, NO.4, PT.2 1036-7 JULY-AUG. 1982 CODEN: INETAK
ISSN: 0020-4412
USCCC Code: 0020-4412/82/2504-1036$01.50
Treatment: APPLIC; PRACTICAL
Doc. Type: JRNL PAP.
Lang.: ENG. (5 Refs)
IN INVESTIGATIONS OF PHASE TRANSITIONS IT BECOMES NECESSARY TO KEEP THERMODYNAMIC PARAMETERS CONSTANT WITH A HIGH DEGREE OF ACCURACY. A PRESSURE REGULATOR WHICH USES AN AUXILIARY THERMOCOMPRESSOR AND A MANGANIN PRESSURE TRANSDUCER IS DESCRIBED. THE SHORT-TIME PRESSURE STABILITY IS 0.01 BAR WHILE THE LONG-TIME STABILITY (OF THE ORDER OF DAYS) REACHES 0.1 BAR. THE REGULATOR CAN BE USED IN HIGH-PRESSURE APPARATUS WITH OPERATING PRESSURES OF UP TO 10-20 KBAR
Desc.: PHASE TRANSFORMATIONS; HIGH-PRESSURE TECHNIQUES; CONTROLLERS ; PRESSURE CONTROL
Ident.: HIGH-PRESSURE REGULATOR; PHASE TRANSITIONS; THERMOCOMPRESSOR ; MANGANIN PRESSURE TRANSDUCER; 10-20 KBAR
Class Codes: A067?T; A0735; C3220; C3120R

Y027013 77
1076729 A83065570
NUCLEAR REACTOR MEASUREMENTS AT UP TO 550 DEGREESC
GOODINGS, A.
CONTROL AND INSTRUMENTATION DIV., AEE WINFRITH, DORCHESTER, ENG.
COLLOQUIUM ON 'HIGH TEMPERATURE ELECTRONICS' 6/1-4 1983
23 MARCH 1983 LONDON, ENG.
Publ: IEE, LONDON, ENG.
40 pp.
Treatment: EXPERIMENTAL
Doc. Type: CONF. PAP.
Lang.: ENG. (8 Refs)
THE REGION OF INTEREST COMPRISES THE MODERATOR, FUEL AND ITS ASSOCIATED COOLANT CHANNELS. DETAILS VARY WITH THE REACTOR TYPE AND TEMPERATURES MAY VARY FROM A FEW TENS OF DEGREES CENTIGRADE (NEAR BIOLOGICAL SHIELDING) TO OF ORDER 1000 DEGREESC (WITHIN THE FUEL). COOLANT OUTLET TEMPERATURES IN POWER PRODUCING REACTORS LIE BETWEEN ABOUT 300 DEGREESC IN WATER SYSTEMS AND 550 DEGREESC IN THE ADVANCED GAS-COOLED REACTOR AND IN SODIUM-COOLED REACTORS. THE LOCAL ATMOSPHERE IS COOLANT A HIGH PRESSURE AND SENSORS MUST ALSO BE ABLE TO SURVIVE A RADIATION ENVIRONEMNT OF FAST AND THERMAL NEUTRONS PLUS A CONCOMITANT GAMMA FLUX. IN SOME CASES THE LATTER CAN DEPOSIT ENERGY AT A RATE OF ORDER 1 W.G./SUP ?1/ AND MAY LEAD TO SUBSTANTIAL TEMPERATURE RISES ABOVE LOCAL AMBIENT. IT IS FOR THIS REASON THAT 550 DEGREES C TECHNOLOGY IS SOMETIMES REQUIRED IN SYSTEMS WITH AN APPARENT TEMPERATURE LIMIT OF ORDER 300 DEGREESC. NEUTRON FLEX MEASUREMENTS ARE USUALLY REQUIRED FOR CONTROL PURPOSES AND IT IS OFTEN NECESSARY TO FOLLOW A WORKING RANGE OF ABOUT 9 DECADES FROM SHUTDOWN TO FULL POWER. THIS IS NECESSARY FOR OPERATIONAL REASONS BUT CAN BE DIFFICULT WITH A SINGLE TYPE OF SENSOR, PARTICULARLY SINCE REACTOR DESIGNS OFTEN IMPOSE LIMITS ON POSSIBLE SENSOR LOCATIONS.
Desc.: FISSION REACTOR CORE CONTROL AND MONITORING; NEUTRON FLUX; HIGH-TEMPERATURE TECHNIQUES; NUCLEAR REACTOR INSTRUMENTATION
Ident.: FISSION REACTOR FUEL; NA-COOLED REACTORS; NEUTRON FLUX MEASUREMENT; NUCLEAR REACTOR INSTRUMENTATION; MODERATOR; COOLANT CHANNELS; POWER PRODUCING REACTORS; WATER SYSTEMS; ADVANCED GAS-COOLED REACTOR; SENSORS; SENSOR LOCATIONS
Class Codes: A2843H; A2843D

Y027013 78
1053961 A83054024
ATTENUATION AND PHASES VELOCITY SPECTRA IN SEDIMENTARY ROCKS UNDER HIGH PRESSURE
WINKLER, K.W.
SCHLUMBERGER-DOLL RES., RIDGEFIELD, CT, USA
MCAVOY, B.R. (Editors)
Sponsor: IEEE; ANDERSEN LAB. INC.; CRYSTAL TECHNOL. INC.; PANAMETRICS, INC. ET AL
1982 ULTRASONICS SYMPOSIUM PROCEEDINGS 1054-8 VOL.2 1982
27-29 OCT. 1982 SAN DIEGO, CA, USA
Publ: IEEE, NEW YORK, USA
2 VOL. 1090 pp.
USCCC Code: 0090-5607/82/0000-1054$00.75
Treatment: EXPERIMENTAL
Doc. Type: CONF. PAP.
Lang.: ENG. (19 Refs)
AN ULTRASONIC BUFFER REFLECTION TECHNIQUE HAS BEEN MODIFIED FOR STUDIES ON POROUS ROCKS UNDER SIMULATED HIGH PRESSURE CONDITIONS. BROADBAND PULSES REFLECTED OFF BOTH FRONT AND BACK FACES OF A SAMPLE ARE PROCESSED TO YIELD PHASE VELOCITY AND ATTENUATION AS A FUNCTION OF FREQUENCY. DIFFRACTION EFFECTS ARE REMOVED BY USING STANDARD CORRECTIONS BASED ON A PISTON RADIATOR TRANSDUCER MODELS EXTERNAL CONFINING PRESSURE AND INTERNAL PORE FLUID PRESSURE ARE INDEPENDENTLY CONTROLLED TO PRESSURES OF 70 MPA (10000 PSI). DATA ARE PRESENTED SHOWING HOW BOTH VELOCITY DISPERSION AND FREQUENCY DEPENDENT ATTENUATION VARY WITH PRESSURE AND SATURATION.
Desc.: ROCKS; HIGH-PRESSURE EFFECTS IN SOLIDS; ULTRASONIC VELOCITY ULTRASONIC DISPERSION; POROUS MATERIALS
Ident.: ATTENUATION SPECTRA; BROADBAND PULSES; DIFFRACTION EFFECTS; EXTERNAL CONFINING PRESSURE; PHASE VELOCITY SPECTRA; SEDIMENTARY ROCKS; ULTRASONIC BUFFER REFLECTION TECHNIQUE; CTN].U*hPROCKS; HIGH PRESSURE CONDITIONS; PISTON RADIATOR TRANSDUCER MODEL; INTERNAL PORE FLUID PRESSURE VELOCITY DISPERSION; FREQUENCY DEPENDENT ATTENUATION; SATURATION
Class Codes: A9160; A6265

Y027013 79
1044606 A83042344, B83027109
A MULTICOMPONENT BALANCE CONSISTING OF PIEZO FORCE ELEMENTS FOR A HIGH-PRESSURE WINDTUNNEL
SCHEWE, G.
DFVLR-AVA GOTTINGEN, GOTTINGEN, GERMANY
TECH. MESS. TM (GERMANY) VOL.49, NO.12 447-52 DEC. 1982 CODEN: TMAMDS
ISSN: 0171-8096
}i Treatment: NEW DEVELOPMENTS; PRACTICAL; EXPERIMENTAL
Doc. Type: JRNL PAP.
Lang.: GERMAN (8 Refs)
THE MAIN AIM IN DEVELOPING A MULTICOMPONENT BALANCE WAS TO GAIN THE ABILITY TO MEASURE STATIC AND DYNAMIC FORCES IN A WINDTUNNEL WHICH CAN BE PRESSURIZED UP TO 100 BAR. THE BALANCE CONSISTS OF PRESSURE-SEALED 3-COMPONENT PIEZO FORCE ELEMENTS (KISTLER, TYPE 9067), WHICH WERE MODIFIED FOR OPERATION AT PRESSURES UP TO 100 BAR. BASED ON THE RIGIDITY OF THE FORCE MEASURING ELEMENTS AND THE CAPABILITY OF MULTICOMPONENT MEASUREMENT WITH ONE LOAD WASHER, THE PIEZO BALANCE FEATURES A HIGH NATURAL FREQUENCY AND LOW INTERFERENCE, WHICH ARE THE ESSENTIAL ADVANTAGES COMPARED TO STRAIN GAUGE BALANCES. AS AN EXAMPLE OF APPLICABILITY THE BALANCE WAS USED TO INVESTIGATE THE STEADY AND FLUCTUATING FORCES ACTING ON A CYLINDER IN CROSS FLOW. BY MEANS OF THE QUASISTATIC METHOD THE STEADY MEASUREMENTS EXTENDED FROM 0, 8 N TO 840 N, WHERE THE MAXIMUM POSSIBLE LOAD IS 10 KN. CONVERSELY THE THRESHOLD FOR DYNAMIC MEASUREMENTS IS AS LOW AS 0.01 N. THE PROBLEM OF MEASURING TIME FOR QUASISTATIC MEASUREMENTS WILL BE DISCUSSED IN DETAIL.
Desc.: FORCE MEASUREMENT; BALANCES; PIEZOELECTRIC TRANSDUCERS; WIND TUNNELS
Ident.: PIEZOELECTRIC FORCE ELEMENTS; STATIC FORCE MEASUREMENT; DYNAMIC FORCE MEASUREMENT; MULTICOMPONENT BALANCE; HIGH-PRESSURE WINDTUNNEL ; QUASISTATIC MEASUREMENTS
Class Codes: A4780; A0710; A0670M; B7320G; B2860; B7230

Y027013 80
1044407 A83040583, B83026873
DESIGN PRINCIPLES FOR THROTTLE-TYPE PNEUMATIC TRANSDUCERS FOR LINEAR MEASUREMENTS
PED', E.I.
IZMER. TEKH. (USSR) VOL.25, NO.2 23-5 FEB. 1982 CODEN: IZTEAW
ISSN: 0021-3349
Trans in: MEAS. TECH. (USA) VOL.25, NO.2 117-20 FEB. 1982 CODEN: MSTCAL
ISSN: 0543-1972
USCCC Code: 0543-1972/82/2502-0117$07.50
Treatment: PRACTICAL
Doc. Type: JRNL PAP.
Lang.: ENG. (2 Refs)
HIGH-PRESSURE PNEUMATIC TRANSDUCERS WITH CYLINDRICAL NOZZLES OF THE THROTTLE TAPE ARE WIDELY USED FOR LINEAR MEASUREMENT IN ENG.RING. PRINCIPLES FOR THE DESIGN OF SUCH A DEVICE ARE DERIVED BASED ON THE EQUALITY OF THE AIR FLOW RATES THROUGH THE INPUT NOZZLE AND THE CHANNEL IN THE SENSITIVE ELEMENT (MEASURING NOZZLE). A SYSTEM OF EQUATIONS FOR THE STATIC CHARACTERISTIC OF THE TRANSDUCER ARE DEDUCED. THE DESIGN OF THE TRANSDUCER ENTAILS CHOOSING THE DIAMETERS OF THE INLET AND MEASUREMENT NOZZLES TOGETHER WITH THE SUPPLY PRESSURE TO PROVIDE GIVEN METROLOGICAL CHARACTERISTICS.
Desc.: PRESSURE TRANSDUCERS; PNEUMATIC CONTROL EQUIPMENT; NOZZLES; FLOW MEASUREMENT
Ident.: HIGH PRESSURE THROTTLE TYPE PNEUMATIC TRANSDUCER; CYLINDRICAL NOZZLES; LINEAR MEASUREMENT; AIR FLOW RATES; INPUT NOZZLE; MEASURING NOZZLE; STATIC CHARACTERISTIC
Class Codes: A0670M; B7230

Y027013 81
1011733 A83020846, B83015324
MINIATURE PRESSURE TRANSDUCERS FOR USE TO 300 DEGREESC
WILNER, L.B.
ENDEVCO MOUNTAIN VIEW, CA, USA
PROCEEDINGS OF THE 28TH INTERNATIONAL INSTRUMENTATION SYMPOSIUM 341-50 VOL.1 1982
3-6 MAY 1982 LAS VEGAS, NV, USA
Publ: ISA, RESEARCH TRIANGLE PARK, NC, USA
2 VOL. 1027 pp.
Treatment: PRACTICAL
Doc. Type: CONF. PAP.
Lang.: ENG. (7 Refs)
A FAMILY OF MINIATURE PRESSURE TRANSDUCERS IS DESCRIBED WHICH EMPLOYS SILICON STRAIN GAGES BONDED WITH SILICON DIOXIDE TO SHAPED SILICON DIAPHRAGMS. A VERY HIGH DOPING LEVEL IS USED IN THE STRAIN GAGES, SO THAT SENSOR PERFORMANCE IS WELL ASSURED TO THE 30? DEGREESC TEMPERATURE LIMIT. THE PERFORMANCE IS COMPARABLE TO ETCH CONTOURED DIFFUSED SENSORS OF THE SAME SIZE. THE 300 DEGREESC SERVICE LIMIT IS SET BY AN INTEGRAL TEFLON CABLE AND BY ORGANIC RESINS USED IN THE ASSEMBLY.
Desc.: PRESSURE TRANSDUCERS; STRAIN GAUGES
Ident.: 300 DEGREES C; SHAPED SI DIAPHRAGM; SI STRAIN GAUGE; MINIATURE PRESSURE TRANSDUCERS; INTEGRAL TEFLON CABLE; ORGANIC RESINS
Class Codes: A0670M; B7230

Y027013 82
1004879 A83024894
RIGHT VENTRICULAR PRESSURE RESPONSE TO +G/SUB Z/ ACCELERATION STRESS
WHINNERY, J.E.; LAUGHLIN, M.H.
CLINICAL SCI. DIV., FLIGHT MEDICINE BRANCH, US AIR FORCE SCHOOL OF AEROSPACE MEDICINE, BROOKS AFB, TX, USA
J. APPL. PHYSIOL. (USA) VOL.53, NO.4 908-13 OCT. 1982 CODEN: JAPYAA
ISSN: 0161-7567
Treatment: EXPERIMENTAL
Doc. Type: JRNL PAP.
Lang.: ENG. (30 Refs)
MEASUREMENTS OF RIGHT VENTRICULAR PRESSURE IN MINIATURE SWINE WERE MADE AT +G/SUB Z/ LEVELS FROM +1 THROUGH +9 G/SUB Z/. POLYETHYLENE CATHETERS WERE CHRONICALLY PLACED IN THE CRANIAL VENA CAVA OF FIVE 2-YR-OLD FEMALE MINIATURE SWINE (35-50 KG). THE CATTETERS WERE LARGE ENOUGH TO ALLOW THE INTRODUCTION OF A MILLAR PRESSURE TRANSDUCER INTO THE VENOUS SYSTEM FOR PLACEMENT IN THE RIGHT HEART. THE ANIMALS WERE FITTED WITH AN ABDOMINAL ANTI-G SUIT, RESTRAINED IN A FIBERGLASS COUCH, AND EXPOSED TO THE VARIOUS +G/SUB Z/ LEVELS ON A CENTRIFUGE WHILE FULLY CONSCIOUS AND UNANESTHETIZED. RIGHT VENTRICULAR PRESSURE AND HEART RATE WERE MEASURED DURING AND FOR 2 MIN FOLLOWING 30-S EXPOSURES TO EACH LEVEL OF +G/SUB Z/ STRESS. THE MAXIMUM RIGHT VENTRICULAR SYSTOLIC PRESSURE OBSERVED DURING +G/SUB Z/ WAS 200 TORR AT +5 G/SUB Z/ WITH THE MAXIMUM DIASTOLIC PRESSURE BEING 88 TORR OBSERVED AT +5 G/SUB Z/. MEAN HEART RATES WERE 200-210 BEATS/MIN AT ALL LEVELS OF +G/SUB Z/>+3G/SUB Z/ WHEN THE ANIMAL REMAINED STABLE. MEAN MAXIMUM RIGHT VENTRICULAR PRESSURES DURING +G/SUB Z/ STRESS WERE OBSERVED TO INCREASED THROUGH +5 G/SUB Z/ (85 TORR) AND TO DECREASE AT HIGHER LEVELS OF +G/SUB Z/, INDICATING THAT THROUGH +5 G/SUB Z/ THERE IS AT LEAST A PARTIAL COMPENSATION DURING ACCELERATION STRESS. DECOMPENSATION IN RESPONSE TO THE STRESS BEGAN TO OCCUR DURING ACCELERATION ABOVE +5 G/SUB Z/ WITH ALL ANIMALS DECOMPENSATING DURING +9 G/SUB Z/.
Desc.: AEROSPACE BIOPHYSICS; CARDIOLOGY; HAEMODYNAMICS
Ident.: RIGHT VENTRICULAR PRESSURE RESPONSE; POLYETHYLENE CATHETERS DECOMPENSATION; +G/SUB Z/ ACCELERATION STRESS; MINIATURE SWINE; CRANIAL VENA CAVA; MILLAR PRESSURE TRANSDUCER; VENOUS SYSTEM; ABDOMINAL ANTI-G SUIT ; CENTRIFUGE; HEART RATE; MAXIMUM RIGHT VENTRICULAR SYSTOLIC PRESSURE; MAXIMUM DIASTOLIC PRESSURE; PARTIAL COMPENSATION
Class Codes: A8?65; A8745H

Y027013 83
1001582 A83020865
DIAMOND ANVIL PRESSURE CELL AND PRESSURE SENSOR FOR HIGH-TEMPERATURE USE (USING YAG: EU/SUP 3+/ FLUORESCENCE SPECTRUM)
ARASHI, H.; ISHIGAME, M.
RES. INST. FOR SCI. MEASUREMENTS, TOHOKU UNIV., SENDAI, JAPAN
JPN. J. APPL. PHYS. PART 1 (JAPAN) VOL.21, NO.11 1647-9 NOV. 1982 CODEN: JAPNDE
ISSN: 0021-4922
Treatment: NEW DEVELOPMENTS; PRACTICAL; EXPERIMENTAL
Doc. Type: JRNL PAP.
Lang.: ENG. (13 Refs)
A NEW MODIFICATION OF THE DIAMOND ANVIL PRESSURE CELL WAS MADE FOR HIGH-TEMPERATURE AND HIGH-PRESSURE USED AFTER THIS MODIFICATION, A HIGH TEMPERATURE OF UP TO 700 DEGREESC COULD BE OBTAINED AT A PRESSURE OF UP TO 7 GPA. VARIOUS SENSOR MATERIALS FOR PRESSURE MEASUREMENT AT HIGH TEMPERATURES WERE ALSO INVESTIGATED. IT WAS FOUND THAT YAG: EU/SUP 3+/ IS A SUITABLE CRYSTAL AS A PRESSURE SENSOR AT HIGH TEMPERATURES, AND THE PRESSURE AND TEMPERATURE DEPENDENCES OF ITS FLUORESCENCE SPECTRUM WAS MEASURED.
Desc.: DIAMOND; HIGH-PRESSURE TECHNIQUES; HIGH-TEMPERATURE TECHNIQUES; YTTRIUM COMPOUNDS; GARNETS; HIGH-PRESSURE TECHNIQUES; HIGH-TEMPERATURE TECHNIQUES; FLUORESCENCE; PRESSURE MEASUREMENT; HIGH-PRESSURE EFFECTS IN SOLIDS; NONELECTRIC SENSING DEVICES; EUROPIUM; LUMINESCENCE OF INORGANIC SOLIDS; PIEZO-OPTICAL EFFECTS
Ident.: FLUORESCENCE; PRESSURE SENSOR; HIGH-TEMPERATURE; DIAMOND ANVIL PRESSURE CELL; HIGH-PRESSURE; YAG: EU/SUP 3+/
Class Codes: A0735; A0720K; A067?D; A7855H; A7820H

Y027013 84 
996074 A83015311, B83010141
BLOOD PRESSURE RADIOTELEMETER FOR SMALL ANIMALS
HARRISON, J.E.
DEPT. OF PATHOLOGY, NEW YORK MEDICAL COLL., VALHALLA, NY, USA
POTVIN, A.R.; POTVIN, J.H. (Editors)
IEEE 1982 FRONTIERS OF ENG.RING IN HEALTH CARE. PROCEEDINGS - FOURTH ANNUAL CONFERENCE 606-7 1982
20-21 DEPT. 1982 PHILADELPHIA, PA, USA
Publ: IEEE, NEW YORK, USA
633 pp.
Treatment: PRACTICAL; EXPERIMENTAL 
Doc. Type: CONF. PAP.
Lang.: ENG. (2 Refs)
A MINIATURE CAPACITANCE TYPE BLOOD PRESSURE TRANSDUCER AND RADIOTELEMETER HAVE BEEN DEVELOPED FOR CHRONIC BLOOD PRESSURE MEASUREMENT IN THE UNRESTRAINED RAT. PROTOTYPES OF THE SYSTEM HAVE BEEN CONSTRUCTED FROM ORDINARY MATERIALS IN A TYPICAL ELECTRONIC WORKSHOP. BLOOD PRESSURE IS SENSED THROUGH AN INTRA-ARTERIAL CATHETER WHICH MAKES A LIQUID CONNECTION TO THE PRESSURE SENTITIVE DIAPHRAGM OF THE TRANSDUCER. THE CAPACITANCE OF THE TRANSDUCER AND A COIL FORM A TUNED CIRCUIT IN A SINGLE TRANSISTOR HARTLEY OSCILLATOR WHICH PRODUCES A RADIO FREQUENCY THAT IS FREQUENCY MODULATED BY THE BLOOD PRESSURE SIGNAL. THE ENTIRE SYSTEM INCLUDING TRANSDUCER AND PRESSURE DOME, THE OSCILLATOR AND BATTERY MEASURES 8?MM IN DIAMETER AND 10 MM IN LENG.ND WEIGHS 1.5 GRAMS.
Desc.: PRESSURE TRANSDUCERS; TELEMETERING SYSTEMS; BIOLOGICAL TECHNIQUES AND INSTRUMENTS; HAEMODYNAMICS
Ident.: BLOOD PRESSURE RADIOTELEMETER; BIOLOGICAL RESEARCH INSTRUMENTATION; SMALL ANIMALS; MINIATURE CAPACITANCE TYPE BLOOD PRESSURE TRANSDUCER; CHRONIC BLOOD PRESSURE MEASUREMENT; UNRESTRAINED RAT; INTRA-ARTERIAL CATHETER; PRESSURE SENSITIVE DIAPHRAGM; TUNED CIRCUIT; SINGLE TRANSISTOR HARTLEY OSCILLATOR; PRESSURE DOME; OSCILLATOR; BATTERY
Class Codes: A8780; A8745H; B7510?; B7210F; B7320V; B7230

Y027013 85
995782 A83010833, B83009785
ACCURACY STATEMENT FOR A FACILITY USED TO CALIBRATE STATIC PRESSURE TRANSDUCERS AND DIFFERENTIAL PRESSURE TRANSDUCERS AT HIGH BASE PRESSURE
SINDT, C.F.; LABRECQUE, J.F.
Issued by: NAT. BUR. STAND., WASHINGTON, DC, USA;
JUNE 1982
39 pp.
Report No.: NBS-TN-1052 (REVIVED)
Treatment: PRACTICAL
Doc. Type: REPORT
Lang.: ENG. (2 Refs)
A FACILITY HAS BEEN DEVELOPED TO CALIBRATE PRESSURE TRANSDUCERS THAT ARE USED IN THE NBS GAS MASS FLOW FACILITY. AN AIR DEAD WEIGHT TESTER IS THE STANDARD FOR STATIC TRANSDUCERS IN THE RANGE FROM 3.8 TO 4.5 MPA AND FOR THE DIFFERENTIAL PRESSURE TRANSDUCERS IN THE RANGE OF 2.5 KPA TO 50 KPA; A CISTERN MANOMETER PROVIDES THE TRANSFER FOR THE STANDARD TO A BASE OPERATING PRESSURE OF 41 MPA. THE CALIBRATION OF THE AIR DEAD WEIGHT GAUGE BY NBS-WASHINGTON CONTRIBUTES +OR- 65 PPM TO THE UNCERTAINTY OF THE CALIBRATION OF THE STATIC PRESSURE TRANSDUCERS. THE CALIBRATION OF THE AIR DEAD WEIGHT GAUGE ADDS +OR- 69 PPM TO THE CALIBRATION OF THE CISTERN MANOMETER. THIS, PLUS THE UNCERTAINTIES IN THE HIGH PRESSURE CORRECTIONS TO THE CISTERN MANOMETER AND THE MEASUREMENT OF THE MERCURY TEMPERATURE, CONTRIBUTES +OR- 690 PPM TO THE UNCERTAINTY OF THE DIFFERENTIAL PRESSURE TRANSDUCER CALIBRATIONS.
Desc.: PRESSURE TRANSDUCERS; CALIBRATION; MEASUREMENT STANDARDS; MEASUREMENT ERRORS; FLOW MEASUREMENT
Ident.: CALIBRATION; MEASUREMENT STANDARDS; FLOW MEASUREMENT; NBS GAS MASS FLOW FACILITY; AIR DEAD WEIGHT TESTER; STATIC TRANSDUCERS; 3.8 TO 4.5 MPA; DIFFERENTIAL PRESSURE TRANSDUCERS; 2.5 KPA TO 50 KPA; CISTERN MANOMETER; BASE OPERATING PRESSURE OF 4.1 MPA
Class Codes: A0670M; A?620H; A4780; B7230; B7320W; B7130

Y027013 86 
984476 A83009776
RESPIRATORY ASSISTANCE: A REVIEW OF TECHNIQUES, RATIONALE, AND PROBLEMS WITH A GLIMPSE AT THE FUTURE
BUNNELL, J.B.
BUNNELL LIFE SYSTEMS INC., SALT LAKE CITY, UT, USA
ANN. BIOMED. ENG.SA) VOL.9, NO.5-6 645-57 1981 CODEN: ABMECF
ISSN: 0090-6964
SYMPOSIUM ON THE RESPIRATORY SYSTEM: ANALYSIS OF FUNCTION AND APPLICATIONS 21-23 SEPT. 1981 HOUSTON, TX, USA
Treatment: GENERAL, REVIEW
Doc. Type: CONF. PAP.
Lang.: ENG. (36 Refs)
THE HISTORY OF RESPIRATORY ASSISTANCE HAS BEEN MARKED BY TREMENDOUS TIME LAGS BETWEEN LABORATORY DEVELOPMENTS AND CLINICAL APPLICATION. THE EVENTS OF MORE RECENT HISTORY AND THE INTRODUCTION OF RADICALLY NEW TECHNIQUES USING MICROPROCESSOR TECHNOLOGY MAY PROVE THAT AN EXPONENTIAL REDUCTION OF THIS TIME LAG IS NOW IN PROGRESS. IN THE PAST 50 YEARS A NUMBER OF TECHNIQUES OF RESPIRATORY ASSISTANCE HAVE BEEN DEVELOPED AND WIDELY USED BUT ARE NOW BEING PHASED OUT OR REJECTED DUE TO THE DISCOVERY OF PRACTICAL, PHYSIOLOGICAL, AND/OR PATHOLOGICAL PROBLEMS. THE WIDESPREAD USE OF CONTINUOUS POSITIVE AIRWAY PRESSURE (CPAP) AND INTERMITTENT MANDATORY VENTILATION (IMV) HAVE DONE MUCH TO DECREASE THESE COMPLICATIONS OF AGGRESSIVE RESPIRATORY THERAPY. HOWEVER, MANY PATIENTS CONTINUE TO REQUIRE RELATIVELY HIGH PPRESSURE, HIGH O/SUB 2/-CONCENTRATION THERAPY. PROMISE OF BETTER THERAPY FOR THESE PATIENTS NOW RESIDES WITH HIGH FREQUENCY VENTILATION. AS IMPROVEMENTS IN SENSOR AND TRANSDUCER RELIABILITY ARE REALIZED, TECHNIQUES USED TO MEASURE THE MECHANICAL CHARACTERISTICS OF THE LUNGS, THE DISTRIBUTION OF VENTILATION, AND VENTILATION PERFUSION RELATIONSHIPS MAY BE AUTOMATED AND INCORPORATED INTO RESPIRATORY CONTROL MACHINES THAT WILL REPRESENT SOME FUTURE GENERATION OF MECHANICAL VENTILATORS. REALIZATION OF THIS POTENTIAL CANNOT HELP BUT DRAMATICALLY IMPROVE THE DELIVERY OF RESPIRATORY ASSISTANCE.
Desc.: REVIEWS; PATIENT CARE; PNEUMODYNAMICS; HISTORY
Ident.: RESPIRATORY ASSISTANCE; VENTILATION DISTRIBUTION; MEDICAL RATIONALE; MEDICAL PROBLEMS; MEDICAL TECHNIQUES; HF VENTILATION; LUNG MECHANICAL CHARACTERISTICS; HISTORY; PATHOLOGICAL PROBLEMS; CONTINUOUS POSITIVE AIRWAY PRESSURE; INTERMITTENT MANDATORY VENTILATION; VENTILATION-PERFUSION RELATIONSHIPS
Class Codes: A8770G; A8745H; A0130R; A0165

Y027013 87 
979487 A83001893, B83004799
STUDIES ON THE ULTRASONIC VIBRATION PRESS OF POWDER-ON THE VIBRATION PRESS WITH A VIBRATION DIE
TSUJINO, J.; UEOKA, T.; AOKI, S.; ATSUMI, Y.
FACULTY OF ENGNG., KANAGAWA UNIV., YOKOHAMA, JAPAN
Sponsor: JAPAN SOC. APPL. PHYS.; SCI. COUNCIL JAPAN
JPN. J. APPL. PHYS. (JAPAN) VOL.21, SUPPL.21-3 199-201 1982 CODEN: JJAPA5
PROCEEDINGS OF THE 2ND SYMPOSIUM ON ULTRASONIC ELECTRONICS 7-9 DEC. 1981
TOKYO, JAPAN
Treatment: EXPERIMENTAL
Doc. Type: CONF. PAP.
Lang.: ENG. (4 Refs)
AN ULTRASONIC VIBRATION PRESS OF HARD METAL (WC-CO ALLOY) POWDER WITH A 20 KHZ LONGITUDINAL VIBRATION DIE IS STUDIED. THE RESONANCE FREQUENCIES OF UPPER AND LOWER PUNCHES USED ARE (1) 27 KHZ AND 20 KHZ, AND (2) 20 KHZ AND 20 KHZ. THE ULTRASONIC LONGITUDINAL VIBRATION DIE CONSISTS OF A RADIAL-LONGITUDINAL VIBRATION DIRECTION CONVERTER AND 8 BOLT-CLAMPED LANGEVIN TYPE PZT TRANSDUCERS. THE UPPER AND LOWER COMPACTING PUNCHES ARE NOT DRIVEN, AND ONLY THE VIBRATION DIE IS DRIVEN BY A 1 KW POWER AMPLIFIER. IT IS SHOWN THAT THE ULTRASONIC VIBRATION OF A COMPACTING DIE IS VERY EFFECTIVE TO OBTAIN COMPACTS WITH HIGHER AND MORE UNIFORM DENSITY THAN WITHOUT VIBRATION.
Desc.: ULTRASONIC EQUIPMENT; DENSIFICATION; POWDER TECHNOLOGY; TUNGSTEN ALLOYS; COBALT ALLOYS; CERMETS; POWDER METALLURGY; DENSIFICATION; HIGH-PRESSURE TECHNIQUES
Ident.: BOLT CLAMPED LANGEVIN TYPE PB (ZR, TI)O/SUB 3/ TRANSDUCERS; ULTRASONIC VIBRATION PRESS; POWDER; VIBRATION DIE; WC-CO; RESONANCE FREQUENCIES; RADIAL-LONGITUDINAL VIBRATION DIRECTION CONVERTER; COMPACTING PUNCHES
Class Codes: A4385; A8120N; A8120E; A0735; B7810

Y027013 88 
978878 B8304075, C83000835
A STUDY ON THE CAPACITANCE SENSING ELEMENTS FOR ELECTRONIC D/P TRANSMITTER
KUBO, A.; WATANABE, Y.; SHIMADA, Y.
PROCESS INSTRUMENTATION DIV. 1, SHIMADZU CORP., KYOTO, JAPAN
AKASHI, H. (Editors)
CONTROL SCIENCE AND TECHNOLOGY FOR THE PROGRESS OF SOCIETY. PROCEEDINGS OF THE EIGHTH TRIENNIAL WORLD CONGRESS OF THE INTERNATIONAL FEDERATION OF AUTOMATIC CONTROL 2129-34 VOL.4 1982
24-28 AUG. 1981 KYOTO, JAPAN
Publ: PERGAMON, OXFORD, ENG.
7 VOL. LXXIX+3914 pp. ISBN 0 08 027580 X
Treatment: PRACTICAL
Doc. Type: CONF. PAP.
Lang.: ENG. (1 Refs)
DESCRIBES THE CONSTRUCTIONS AND A STUDY OF BASIC ELEMENTS CONCERNING THE SENSING ELEMENTS ON THE ELECTRONIC DIFFERENTIAL PRESSURE TRANSMITTER, ORIGINATING IN THE PRINCIPLE OF DIFFERENTIAL CAPACITANCE. TWIN ROOM CONSTRUCTION AND SINGLE ROOM CONSTRUCTION OF SENSING ELEMENTS ARE WELL KNOWN. THE RESPECTIVE CHARACTERISTICS OF THESE TYPES OF CONSTRUCTION ARE MADE CLEAR THROUGH ANALYZING THE TWO SENSING ELEMENTS OF THE RESPECTIVE CONSTRUCTIONS. THE FUNDAMENTAL FORMULA CONCERNING THE STRETCHED FLAT DIAPHRAGM, WHICH IS USED IN THE TWIN ROOM TYPE, AND THE CHARACTERISTIC OF MOVING DEFLECTION V.S. CAPACITANCE ARE DISCUSSED. MOREOVER, THE CHARACTERISTICS OF THE THICK FLAT DIAPHRAGM WITH A GROOVE TO BE USED FOR HIGH PRESSURE DIFFERENCE MEASUREMENT ARE DESCRIBED.
Desc.: PRESSURE MEASUREMENT; ELECTRIC SENSING DEVICES; PRESSURE TRANSDUCERS
Ident.: TWIN ROOM CONSTRUCTION; CAPACITANCE SENSING ELEMENTS; ELECTRONIC D/P TRANSMITTER; ELECTRONIC DIFFERENTIAL PRESSURE TRANSMITTER; SINGLE ROOM CONSTRUCTION; STRETCHED FLAT DIAPHRAGM; PRESSURE DIFFERENCE MEASUREMENT
Class Codes: B7230; B7320V; C3240D; C3120R

Y027013 89 
978833 A83000281, B83004021
HALL-EFFECT DEVICES AS STRAIN AND PRESSURE SENSORS
KANDA, Y.; YASUKAWA, A.
HAMAMATSU UNIV. SCHOOL OF MEDICINE, HAMAMATSU, JAPAN
SENS. AND ACTUATORS (SWITZERLAND) VOL.2, NO.3 283-96 JULY 1982 CODEN: SEACDX
Treatment: THEORETICAL EXPERIMENTAL
Doc. Type: JRNL PAP.
Lang.: ENG. (6 Refs)
IT WAS FOUND THAT THE OFFSET VOLTAGE OF THE HALL-EFFECT DEVICE IS VERY SENSITIVE TO MECHANICAL STRAIN WITHOUT APPLICATION OF A MAGNETIC FIELD. THIS EFFECT IS CALLED THE KANDA EFFECT. AN EXPLANATORY MODEL OF THE EFFECT IS SUGGESTED. IT IS A SQUARE BRIDGE CIRCUIT CONSISTING OF FOUR STRESS-VARIABLE RESISTANCES. EACH RESISTANCE IS CONNECTED TO THE MIDDLE POINTS OF THE NEIGHBOURING SIDES. THE OUTPUT IS PROPORTIONAL TO THE DIFFERENCE BETWEEN THE LONGITUDINAL AND TRANSVERSE PIEZORESISTANCE COEFFICIENTS. THE MODEL IS CONFIRMED BY THE EXPERIMENTS. AN IC STRAIN SENSOR USING THIS EFFECT IS PROPOSED. THE DESIGN ANALYSIS OF SILICON DIAPHRAGM PRESSURE SENSORS USING THE KANDA EFFECT IS CONSIDERED FOR SQUARE, RECTANGULAR AND CIRCULAR DIAPHRAGMS. THE POTENTIAL DISTRIBUTION RESULTING FROM CONDUCTIVITY DISTRIBUTION IS OBTAINED BY THE FINITE-DIFFERENCE METHOD. THE RELAXATION METHOD IS USED FOR NUMERICAL CALCULATION. THIS PRESSURE SENSOR IS ATTRACTIVE FOR MINIATURE BIOMEDICAL APPLICATIONS.
Desc.: HALL EFFECT TRANSDUCERS; PRESSURE TRANSDUCERS; PRESSURE MEASUREMENT; STRAIN GAUGES; DIAPHRAGMS; SILICON; BIOMEDICAL EQUIPMENT
Ident.: STRAIN SENSORS; PRESSURE SENSORS; SI DIAPHRAGM PRESSURE SENSOR; OFFSET VOLTAGE; HALL-EFFECT DEVICE; MECHANICAL STRAIN; KANDA EFFECT ; SQUARE BRIDGE CIRCUIT; STRESS-VARIABLE RESISTANCES; PIEZORESISTANCE COEFFICIENTS; IC STRAIN SENSOR; POTENTIAL DISTRIBUTION; CONDUCTIVITY DISTRIBUTION; FINITE-DIFFERENCE METHOD; RELAXATION METHOD; MINIATURE BIOMEDICAL APPLICATIONS
Class Codes: A0670D; A0710; A0670M; B7230; B2560F; B7320V; B7510

Y027013 90 
910218 A82079557, B82043179, C82029594
RECENT SEMICONDUCTOR PRESSURE SENSORS
NISHIHARA, M.; YAMADA, K.; MATSUOKA, Y.
HITACHI RES. LAB., HITACHI LTD., IBAAKI, JAPAN
HITACHI REV. (JAPAN) VOL.30, NO.6 285-9 DEC. 1981 CODEN: HITAAQ
Treatment: GENERAL, REVIEW; PRACTICAL
Doc. Type: JRNL PAP.
Lang.: ENG. (5 Refs)
SEMICONDUCTOR PRESSURE SENSORS HAVE EXCELLENT CHARACTERISTICS, SUCH AS HIGH SENSITIVITY, NO HYSTERESIS, AND SMALL SIZE, TO RECOMMEND THEIR USE IN A WIDE RANGE OF AREAS. THE PAPER DESCRIBES SEMICONDUCTOR PRESSURE SENSORS WHICH HAVE BEEN DEVELOPED FOR INDUSTRIAL INSTRUMENTS SUCH AS DIFFERENTIAL PRESSURE TRANSMITTERS, PRESSURE TRANSMITTERS, AND AUTOMOBILE ENG.CONTROL SYSTEMS. HIGH ACCURACY AND HIGH SENSITIVITY PRESSURE SENSORS HAVE BEEN DEVELOPED AS A RESULT OF DETAILED EXAMINATION OF THE SILICON PIEZORESISTANCE EFFECT. SENSOR CHARACTERISTICS INCLUDE NONLINEARITY OF +OR- 0.02 TO +OR- 02? PERCENT AND SENSITIVITY OF 20 TO 60 MV/V, WHILE PRESSURE RANGES ARE FROM 1 KPA TO 50 MPA.
Desc.: PRESSURE TRANSDUCERS; SILICON; PIEZOELECTRIC TRANSDUCERS
Ident.: SEMICONDUCTOR PRESSURE SENSORS; DIFFERENTIAL PRESSURE TRANSMITTERS; AUTOMOBILE ENG.CONTROL SYSTEMS; SILICON PIEZORESISTANCE EFFECT; NONLINEARITY; SENSITIVITY; PRESSURE RANGES
Class Codes: A0670M; B7230; B2860; C3240D

Y027013 91 
910217 A82079556, B82043177
CALIBRATING OF PIEZOELECTRIC PRESSURE SENSORS FOR HIGH PRESSURES
ALTENBURGER, S.; BEYER, G.
ASMW, FACHABTEILUNG GESETZLICHE METROLOGIE, KARL-MARX-STADT, GERMANY
FEINGERAETETECHNIK (GERMANY) VOL.30, NO.9 409-11 1981 CODEN: FGRTA3
Treatment: PRACTICAL
Doc. Type: JRNL PAP.
Lang.: GERMAN (9 Refs)
PIEZOELECTRIC PRESSURE SENSORS FOR HIGH PRESSURES ARE INVESTIGATED. IT IS SHOWN THAT IN THE APPLICATION OF THE SENSORS IN FACTORIES, TIME AND COSTS CAN BE REDUCED BY EXTRAPOLATION OF THE CHARACTERISTIC CURVE IN THE HIGHER PART OF THE APPLICATION RANGE. IT IS EMPHASISED THAT THE FIRST CALIBRATION HAS TO BE MADE IN THE WHOLE APPLICATION RANGE.
Desc.: PIEZOELECTRIC TRANSDUCERS; PRESSURE TRANSDUCERS; ELECTRIC SENSING DEVICES; CALIBRATION; HIGH-PRESSURE TECHNIQUES
Ident.: HIGH PRESSURE; PIEZOELECTRIC PRESSURE SENSORS; EXTRAPOLATION ; CHARACTERISTIC CURVE; CALIBRATION
Class Codes: A0670M; A0670D; A0620H; B7230; B2860; B7130

Y027013 92 
909145 B82043714
ON THE PROBLEM OF TEMPERATURE COMPENSATION IN DIRECT MEASUREMENT OF AERODYNAMIC PRESSURES
GATZEK, W.
INST. FUR AEROELASTIK, DFVLR-AVA, GOTTINGEN, GERMANY
SENSOR '82. TRANSDUCER TECHNOLOGY AND TEMPERATURE MEASUREMENT CONFERENCE
138-57 VOL.1 1982
12-14 JAN. 1982 ESSEN, GERMANY
Publ: NETWORK, BUCKINGHAM, ENG.
3 VOL. (250+235+226) pp.
Treatment: PRACTICAL
Doc. Type: CONF. PAP.
Lang.: GERMAN (5 Refs)
DEALS WITH DIRECT MEASUREMENT OF PRESSURE ON WIND TUNNEL MODELS FOR BOTH STEADY AND UNSTEADY CONDITIONS. IN PLACE OF THE USUAL MULTIPLEXER, HIGHLY SENSITIVE MINIATURE GAUGES ARE EMPLOYED IN INDIVIDUAL HOLES ON THE MODEL. THIS HAS ADVANTAGES FOR DYNAMIC PRESSURE MEASUREMENT, BUT PLACES SEVERE DEMANDS OF THE TEMPERATURE STABILITY OF THE TRANSDUCERS IN THE CONSTANTLY INCREASING TEMPERATURE OF THE WIND TUNNEL. A TEMPERATURE-STABILIZED WHEATSTONE BRIDGE CIRCUIT USED FOR HIGH ACCURACY IS DESCRIBED IN DETAIL.
Desc.: WIND TUNNELS; BRIDGE CIRCUITS; COMPENSATION; PRESSURE MEASUREMENT; STRAIN GAUGES
Ident.: STRAIN GAUGE; TEMPERATURE COMPENSATION; DIRECT MEASUREMENT OF AERODYNAMIC PRESSURES; WIND TUNNEL MODELS; MINIATURE GAUGES; DYNAMIC PRESSURE MEASUREMENT; TEMPERATURE STABILITY; TRANSDUCERS; WHEATSTONE BRIDGE CIRCUIT
Class Codes: B7620; B7320V; B72?0; B1290

Y027013 93 
908922 B82043405
QUALITY IMPROVEMENTS IN MOULDING BY MEANS OF PRESSURE MEASUREMENT IN THE MOULD CAVITY
VOGELPOHL, R.
DYNISCO GERATE GMBH, HEILBRONN, GERMANY
SENSOR '82. TRANSDUCER TECHNOLOGY AND TEMPERATURE MEASUREMENT CONFERENCE
132-7 VOL.1 1982
12-14 JAN. 1982 ESSEN, GERMANY
Publ: NETWORK, BUCKINGHAM, ENG.
3 VOL. (250+235+226) pp.
Treatment: APPLIC; PRACTICAL
Doc. Type: CONF. PAP.
Lang.: GERMAN
THE ADVANTAGES OF MONITORING THE PRESSURE WITHIN THE CAVITY OF AN INJECTION MOULDING MACHINE ARE OUTLINED. THE INSTRUMENTATION DESCRIBED IS BASED ON THE USE OF STRAIN GAUGES, MOUNTED EITHER BENEATH THE EJECTOR (INDIRECT METHOD) OR WITHIN THE MOULD ITSELF (DIRECT METHOD). THE LATTICE METHOD USES A MINIATURE TRANSDUCER IN ORDER TO DIFFERENTIATE BETWEEN CONDITIONS WITHIN THE MOULD AND THOSE IN THE VICINITY OF THE SCORE. MEASUREMENT OF HYDRAULIC PRESSURE IS MADE FOR COMPARISON, BUT THIS DOES NOT ACCURATELY REFLECT CAVITY PRESSURE. INCORPORATION OF THE TRANSDUCER ARRANGEMENT INTO THE OVERALL CONTROL SYSTEM IS DESCRIBED, AND THE DETERMINATION OF AN OPTIMAL PRESSURE CURVE IS DISCUSSED.
Desc.: PRESSURE MEASUREMENT; STRAIN GAUGES; PRESSURE TRANSDUCERS
Ident.: MOULDING; PRESSURE MEASUREMENT; MOULD CAVITY; MONITORING; INJECTION MOULDING MACHINE; STRAIN GAUGES; MINIATURE TRANSDUCER; HYDRAULIC PRESSURE; CAVITY PRESSURE; OPTIMAL PRESSURE CURVE
Class Codes: B7320V; B7230

Y027013 94 
906706 A82077064, B82040812
INFLUENCE OF HYDROSTATIC PRESSURE ON THE ELECTRICAL RESISTANCE OF GALLIUM ARSENIDE WHISKERS
VARSHAVA, S.S.; SYDIR, B.I.
LENIN KOMSOMOL POLYTECH. INST., LVOV, USSR
FIZ. AND TEKH. POLYPROVODN. (USSR) VOL.15, NO.11 2247-9 NOV. 1981 CODEN: FTPPA4
Trans in: SOV. PHYS.-SEMICOND. (USA) VOL.15, NO.11 1303-5 NOV. 1981 CODEN: SPSEAX
Treatment: EXPERIMENTAL
Doc. Type: JRNL PAP.
Lang.: ENG. (15 Refs)
INVESTIGATIONS OF THE INFLUENCE OF HYDROSTATIC PRESSURE ON GROUP III-V SEMICONDUCTORS ARE AN IMPORTANT MEANS FOR DETERMINING THE BAND STRUCTURE AND ENERGY SPECTRA, AND FOR PROVIDING INFORMATION ESSENTIAL IN THE FABRICATION OF SENSITIVE PRESSURE TRANSDUCERS. THE SAMPLES WERE GAAS WHISKER CRYSTALS. WHISPERS WERE GROWN BY THE GAS-TRANSPORT REACTIONS IN A QUARTZ AMPOULE. THE AUTHORS INVESTIGATED UNDOPED SAMPLES AS WELL AS DOPED WITH CERTAIN IMPURITIES EITHER SINGLY (TE, SN, S, MG) OR IN MUTUALLY COMPENSATING PAIRS (TE AND ZN, SI AND ZN, S AND ZN); THE RESISTIVITY WAS RHO=0.003-2.5 OMEGA>CM. THE AUTHORS INVESTIGATE THE HYDROSTATIC PRESSURE COEFFICIENTS OF THE RESISTIVITY OF THE VARIOUS SAMPLES.
Desc.: GALLIUM ARSENIDE; III-V SEMICONDUCTORS; WHISKERS (CRYSTAL); ELECTRICAL CONDUCTIVITY OF CRYSTALLINE SEMICONDUCTORS AND INSULATORS; HIGH-PRESSURE EFFECTS IN SOLIDS
Ident.: GAAS: TE; GAAS: SN; GAAS: S; GAAS: MG; GAAS: TE, ZN; GAAS: SI, ZN GAAS: S, ZN; HYDROSTATIC PRESSURE; ELECTRICAL RESISTANCE; III-V SEMICONDUCTORS; GAAS WHISKER CRYSTALS; GAS-TRANSPORT REACTIONS
Class Codes: A7220F; A7280E; A6250; A6870; B2520D

Y027013 95 
895816 A82073295
MYOCARDIAL MECHANICS IN EXPERIMENTALLY SIMULATED MITRAL VALVE INSUFFICIENCY
YASHA KRESH, J.; BROCKMAN, S.K.; BEKOE, S.; AKROUT, J.; KATZ, P.A.
DIV. OF CARDIOTHORACIC SURGERY, JEFFERSON MEDICAL COLL., PHILADELPHIA, PA, USA
HANSEN, E.W. (Editors)
PROCEEDINGS OF THE TENTH ANNUAL NORTHEAST BIOENG.RING CONFERENCE 327-32 1982
15-16 MARCH 1982 HANOVER, NH, USA
Publ: IEEE, NEW YORK, USA
XI+356 pp.
Treatment: EXPERIMENTAL
Doc. Type: CONF. PAP.
Lang.: ENG. (7 Refs)
THIS STUDY WAS DESIGNED TO CHARACTERIZE BOTH REGIONAL AND GLOBAL CARDIAC MECHANICS IN EXPERIMENTALLY SIMULATED MITRAL VALVE INSUFFICIENCY. MITRAL VALVE INSUFFICIENCY WAS MODELED BY MEANS OF A VENTRICULO-ATRIAL SHUNT COMMUNICATING BETWEEN THE APEX OF THE LEFT VENTRICLE AND LEFT ATRIAL APPENDAGE. INSTANTANEOUS LEFT-VENTRICULAR ENDOCARDIAL MINOR-AXIS DIAMETER, EQUATORIAL WALL-THICKNESS, AND REGIONAL VENTRICULAR SEGMENT-LENG.ERE MEASURED WITH IMPLANTED MINIATURE ULTRASONIC DIMENSION TRANSDUCERS. LEFT VENTRICULAR PRESSURE, AORTIC PRESSURE, AORTIC FLOW, AND SHUNT (REGURGITANT) FLOW WERE ALSO MEASURED. IN ADDITION, LEFT VENTRICULAR CIRCUMFERENTIAL WALL STRESS WAS COMPUTED. THE RESULTS INDICATE THAT THE MECHANISM OF 'MYOCARDIAL UNLOADING' AND LEFT VENTRICULAR 'VOLUME OVERLOAD' RESULTING IN ENHANCED CARDIODYNAMIC FUNCTION MUST BE TAKEN INTO CONSIDERATION WHEN EVALUATING MVI AND THE EXPECTED OUTCOME OF MITRAL VALVE REPLACEMENT. ANALYSIS OF MVI IS BEST CHARACTERIZED WITHIN A CONCEPTUAL FRAMEWORK ESTABLISHED BY LV-PRESSURE (STRESS)-DIMENSION RELATIONS.
Desc.: CARDIOLOGY; HAEMODYNAMICS
Ident.: MYOCARDIAL MECHANICS; LEFT VENTRICULAR PRESSURE; REGIONAL CARDIAC MECHANICS; END-SYSTOLIC PRESSURE-DIMENSION RELATIONS; REGURGITANT FLOW; EXPERIMENTALLY SIMULATED MITRAL VALVE INSUFFICIENCY; GLOBAL CARDIAC MECHANICS; VENTRICULO-ATRIAL SHUNT; AORTIC PRESSURE; AORTIC FLOW
Class Codes: A8745H

Y027013 96 
891960 A82069141, B82038144
DYNAMIC WEIGHT DETECTOR FOR MILLIGRAM PARTICLES
MULDER, B.J.
PHILIPS' RES. LABS., EINDHOVEN, NETHERLANDS
J. PHYS. E (GB) VOL.15, NO.5 501-3 MAY 1982 CODEN: JPSIAE
Treatment: APPLIC
Doc. Type: JRNL PAP.
Lang.: ENG. (2 Refs)
STARTING WITH A PIEZOELECTRIC PICK-UP ELEMENT FOR RECORD PLAYING A WEIGHT DETECTOR WAS CONSTRUCTED FOR PARTICLE WITH WEIGHTS IN THE 0>1-20 MG RANGE. THE DETECTOR HAS A LINEAR RESPONSE, A SENSITIVITY OF AT LEAST 10 MUG AND CAN WEIGH PARTICLES AT A RATE OF AT LEAST 10 S/SUP -1/. THE DETECTOR CAN BE USED FOR WEIGHING AND SELECTING, FOR INSTANCE, METAL HALIDE SPHERULES FOR THE FABRICATION OF HIGH-PRESSURE DISCHARGE LAMPS.
Desc.: BALANCES; PIEZOELECTRIC TRANSDUCERS
Ident.: 0.1 TO 20 MG; PIEZOELECTRIC PICK-UP ELEMENT; WEIGHT DETECTOR ; METAL HALIDE SPHERULES; HIGH-PRESSURE DISCHARGE LAMPS
Class Codes: A0630E; B7320M; B2860

Y027013 97 
891290 A82064599, B82038955
MEASUREMENTS OF PRESSURE WAVE SPREADING IN HIGH-PRESSURE REACTORS
CORVIN, P.
BATTELLE-INST. EV, FRANKFURT, GERMANY
SENSOR '82. TRANSDUCER TECHNOLOGY AND TEMPERATURE MEASUREMENT CONFERENCE
187-92 VOL.3 1982
12-14 JAN. 1982 ESSEN, GERMANY
Publ: NETWORK, BUCKINGHAM, ENG.
3 VOL. (250+235+226) pp.
Treatment: PRACTICAL; EXPERIMENTAL
Doc. Type: CONF. PAP.
Lang.: GERMAN
DISCUSSES METHODS FOR DETERMINING THE VIBRATION CHARACTERISTICS OF NUCLEAR REACTOR STRUCTURES FROM THE POINT OF VIEW OF THEIR SAFETY IN EARTHQUAKES. THE INDEVCO 5241 ACCELEROMETER WAS FOUND SUITABLE FOR 95PERCENT OF THE SITES NEEDED FOR MEASURING THE VIBRATION CHARACTERISTICS.
Desc.: NUCLEAR REACTOR INSTRUMENTATION; EARTHQUAKES; VIBRATION MEASUREMENT; ACCELEROMETERS; FISSION REACTOR SAFETY
Ident.: PRESSURE WAVES MEASUREMENT; VIBRATION MEASUREMENT; FISSION REACTOR SAFETY; HIGH-PRESSURE REACTORS; VIBRATION CHARACTERISTICS; NUCLEAR REACTOR; SAFETY; EARTHQUAKES; ENDEVCO 5241 ACCELEROMETER
Class Codes: A2843H; A0710; A2844; B8220B; B7320Z; B0160

Y027013 98 
890426 B82037943
FAST PRESSURE GAUGE FOR HOT AND CORROSIVE GASES 
ZAENG.T.; LENS, G.A.
PHILIPS GMBH FORSCHUNGSLAB. AACHEN, AACHEN, GERMANY
PHILIPS TECH. REV. (NETHERLAND) VOL.39, NO.12 344-5 1980 CODEN: PTREAN
Treatment: APPLIC; PRACTICAL
Doc. Type: JRNL PAP. 
Lang.: ENG.
PRESSURE MEASUREMENTS AT HIGH TEMPERATURES IN A CORROSIVE MEDIUM, AS IN HIGH-PRESSURE GAS DISCHARGE LAMPS, PLACE EXACTING REQUIREMENTS ON THE PRESSURE SENSORS. BY COMBINING A SILICA-GLASS MECHANICAL SENSOR, AN OPTO-ELECTRONIC CONVERSION OF ITS DEFORMATION AND A PRESSURE-COMPENSATION CONTROL A PRESSURE GAUGE HAS BEEN OBTAINED THAT CAN BE USED AT TEMPERATURES UP TO 1200K AND CAN MEASURE DIFFERENTIAL PRESSURES UP TO ABOUT +OR- 30 KPA WITH A REPRODUCIBILITY OF 100 PA.
Desc.: PRESSURE MEASUREMENT; DISCHARGE LAMPS; PRESSURE TRANSDUCERS
Ident.: HOT GASES; FAST PRESSURE GAUGE; PRESSURE MEASUREMENT; CORROSIVE GASES; GAS DISCHARGE LAMPS; PRESSURE SENSORS; SILICA-GLASS MECHANICAL SENSOR; OPTO-ELECTRONIC CONVERSION; PRESSURE-COMPENSATION CONTROL; 1200
Class Codes: B7230; B7320V

Y027013 99 
877887 B82033942, C82021408
MINIATURE SILICON CAPACITANCE ABSOLUTE PRESSURE SENSOR
BEHR, M.E.; BAUER, C.F.; GIACHINO, J.M.
Sponsor: IMECHE; IEE
THIRD INTERNATIONAL CONFERENCE ON AUTOMOTIVE ELECTRONICS 255-60 1981
20-23 OCT. 1981 LONDON, ENG.
Publ: MECH. ENG.BLICATIONS, LONDON ENG.
354 pp. ISBN 0 85298 477 4
Treatment: APPLIC
Doc. Type: CONF. PAP.
Lang.: ENG. (5 Refs)
A MINIATURE SILICON CAPACITANCE ABSOLUTE PRESSURE SENSOR IS DISCUSSED IN DETAIL. THE CONSTRUCTION AND MANUFACTURE OF THESE SENSORS IS DESCRIBED. THE CAPACITANCE, THERMAL COEFFICIENT OF CAPACITANCE AND SENSITIVITY OF THE SENSOR IS EVALUATED IN TERMS OF A SATISFACTORY MODEL BASED ON AVERAGE DIAPHRAGM DISPLACEMENT. ADVANTAGES OF CAPACITANCE DEVICES OVER PIEZORESISTIVE STRAIN GAUGE PRESSURE DEVICES ARE CONSIDERED.
Desc.: PRESSURE MEASUREMENT; ELECTRIC SENSING DEVICES; AUTOMOBILES
Ident.: AUTOMOBILES; MINIATURE SILICON CAPACITANCE ABSOLUTE PRESSURE SENSOR; CAPACITANCE; THERMAL COEFFICIENT OF CAPACITANCE; SENSITIVITY; DIAPHRAGM DISPLACEMENT; CAPACITANCE DEVICES; PIEZORESISTIVE STRAIN GAUGE PRESSURE DEVICES
Class Codes: B8520B; B7230; B7320V; ESe40D

Y027013 100 
876582 B82032507
SILICON PRESSURE TRANSDUCER TECHNOLOGY FOR AUTOMOTIVE APPLICATIONS
SWARTZ, E.S.; NEWTON, W.B.; GRAGG, J.E.; DERRINGTON, C.E.
SEMICONDUCTOR GROUP, MOTOROLA INC., MESA, AZ, USA
Sponsor: IMECHE; IEE
THIRD INTERNATIONAL CONFERENCE ON AUTOMOTIVE ELECTRONICS 151-60 1981
20-23 OCT. 1981 LONDON, ENG.
Publ: MECH. ENG.BLICATIONS, LONDON, ENG.
354 pp. ISBN 0 85298 477 4 xD Treatment: APPLIC; PRACTICAL; THEORETICAL
Doc. Type: CONF. PAP.
Lang.: ENG. (3 Refs)
THE PIEZORESISTIVE EFFECT FOUND IN SEMICONDUCTOR MATERIALS OFFERS A HIGHLY COST EFFECTIVE APPROACH TO THE SENSING OF PRESSURE IN AUTOMOTIVE APPLICATION. RECEnT[DEVELOPMENTS IN THE DESIGN AND MANUFACTURING TECHNOLOGY USED FOR THESE DEVICES HAVE ELIMINATED MANY OF THE PROBLEMS WHICH HAVE TRADITIONALLY BEEN ASSOCIATED WITH PIEZORESISTIVE PRESSURE TRANSDUCERS AND NOW ALLOW THEM TO BE MANUFACTURED AND TESTED USING THE LOW COST, HIGH VOLUME TECHNOLOGY OF THE SEMICONDUCTOR INDUSTRY. THE PAPER DISCUSSES THESE NEW DEVELOPMENTS, OUTLINING THE BASIC THEORY BEHIND THE TRANSVERSE VOLTAGE STRAIN GAUGE TECHNOLOGY EMPLOYED IN THIS DESIGN, AND DESCRIBES HOW THIS DESIGN AFFECTS THE OVERALL PERFORMANCE AND RELIABILITY OF THE DEVICE. THE AUTHOR ALSO DESCRIBES THE CUSTOM CHIP CARRIER PACKAGE AND ASSEMBLY TECHNOLOGY DEVELOPED FOR THIS DEVICE AND ILLUSTRATES HOW THIS MANUFACTURING TECHNOLOGY CONTRIBUTES TO THE PERFORMANCE, RELIABILITY, AND COST OF THIS PRODUCT
Desc.: PRESSURE TRANSDUCERS; PRESSURE MEASUREMENT; PIEZOELECTRIC TRANSDUCERS; SEMICONDUCTOR TECHNOLOGY; AUTOMOBILES; ELEMENTAL SEMICONDUCTORS
Ident.: SI PRESSURE TRANSDUCER TECHNOLOGY; PIEZORESISTIVE EFFECT; SEMICONDUCTOR MATERIALS; PIEZORESISTIVE PRESSURE TRANSDUCERS; SEMICONDUCTOR INDUSTRY; TRANSVERSE VOLTAGE STRAIN GAUGE TECHNOLOGY; CUSTOM CHIP CARRIER PACKAGE; ASSEMBLY TECHNOLOGY
Class Codes: B7230; B7320V; B2860

Y027013 101 
876551 B82032472
BOND STRESS TRANSDUCER DESIGN FOR SOLID PROPELLANT ROCKET MOTORS
FRANCIS, E.C.; THOMPSON, R.E.
UNITED TECHNOL. CORP., SUNNYVALE, CA, USA
J. SPACECR. AND ROCKETS (USA) VOL.18, NO.5 411-17 SEPT.-OCT.1981 CODEN: JSCRAG
Treatment: PRACTICAL
Doc. Type: JRNL PAP.
Lang.: ENG. (8 Refs)
AN IMPROVED MINIATURE PRESSURE TRANSDUCER HAS BEEN DEVELOPED FOR USE IN MEASURING STRESS IN SOLID GRAIN ROCLET MOTORS. THE REQUIREMENTS FOR SURVIVAL AND PERFORMANCE ARE SUCH THAT THE SENSOR HAS DIRECT USE AS A GENERAL PRESSURE TRANSDUCER ESPECIALLY WHERE SMALL SIZE AND HIGH RELIABILITY ARE A REQUIREMENT. THE DESIGN WORK AND SOME LONG-TERM PERFORMANCE RESULTS ARE PRESENTED. DESIGN OF THIS RELIABLE STRESS TRANSDUCER FOR EMBEDMENT IN A SOLID PROPELLANT ROCKET MOTOR HAS UTILIZED FINITE-ELEMENT STRUCTURAL ANALYSIS TO REDUCE THE STRESS DISTURBANCE ABOVE THE EXTERNAL TRANSDUCER BODY AND TO OPTIMIZE DIAPHRAGM INTERACTION WITH THE NONLINEAR VISCOELASTIC SOLID PROPELLANT. MINIMIZING THE INTERACTION BETWEEN SOLID PROPELLANT AND TRANSDUCER DIAPHRAGM REQUIRED THAT THE TRANSDUCER BODY AND FLEXURAL DIAPHRAGM BE MUCH STIFFER THAN CONVENTIONAL PRESSURE TRANSDUCERS.
Desc.: STRESS MEASUREMENT; PRESSURE TRANSDUCERS; ROCKETS
Ident.: BOND STRESS TRANSDUCER; SOLID PROPELLANT ROCKET MOTORS MINIATURE PRESSURE TRANSDUCER; SOLID GRAIN ROCKET MOTORS; STRESS TRANSDUCER ; FINITE-ELEMENT STRUCTURAL ANALYSIS; NONLINEAR VISCOELASTIC SOLID PROPELLANT
Class Codes: B7230; B7320Z; B7610

Y027013 102 
876547 B82032468
PHYSICAL SENSORS USING SAW DEVICES
FLEMING DIAS, J.
HEWLETT PACKARD CO., PALO ALTO, CA, USA
HEWLETT-PACKARD J. (USA) VOL.32, NO.12 18-20 DEC. 1981 CODEN: HPJOAX
Treatment: APPLIC; PRACTICAL; EXPERIMENTAL
Doc. Type: JRNL PAP.
Lang.: ENG. (3 Refs)
THE PRINCIPLES OF SURFACE ACOUSTIC WAVE SENSORS ARE EXPLAINED. TEMPERATURE, PRESSURE, FORCE AND DISPLACEMENT SENSORS CAN BE BUILT USING SAW DELAY LINES. THE CONSTRUCTION OF A FORCE TRANSDUCER IS DESCRIBED AND THE RESULTS OF MEASUREMENTS OF ITS CHARACTERISTICS ARE GIVEN. PRESSURE TRANSDUCERS WERE ALSO MADE.
Desc.: SURFACE ACOUSTIC WAVE DEVICES; PIEZOELECTRIC TRANSDUCERS; ELECTRIC SENSING DEVICES; FORCE MEASUREMENT; PRESSURE MEASUREMENT; DISPLACEMENT MEASUREMENT; TEMPERATURE MEASUREMENT
Ident.: PRESSURE TRANSDUCERS; TEMPERATURE SENSORS; SURFACE ACOUSTIC WAVE SENSORS; DISPLACEMENT SENSORS; SAW DELAY LINES; CONSTRUCTION; FORCE TRANSDUCER; CHARACTERISTICS
Class Codes: B7230; B2860C; B7320G; B7320V; B7320C; B7320R

Y027013 103 
859662 A82043039, B82026987
APPLICATION OF THE TEXAS QUARTZ SPIRAL GAUGE TO THE MEASUREMENT OF INTERACTION SECOND VIRIAL COEFFICIENTS
BELL, T.N.; DUNLOP, P.J.
DEPT. OF CHEM., SIMON FRASER UNIV., VANCOUVER, CANADA
REV. SCI. INSTRUM. (USA) VOL.53, NO.1 83-5 JAN. 1982 CODEN: RSINAK
Treatment: APPLIC; PRACTICAL; EXPERIMENTAL
Doc. Type: JRNL PAP.
Lang.: ENG. (7 Refs)
A PROCEDURE IS DESCRIBED WHICH ENABLES A TEXAS INSTRUMENTS QUARTZ SPIRAL GAUGE TO BE CALIBRATED SUFFICIENTLY ACCURATELY SO THAT EXCESS VIRIAL COEFFICIENTS CAN BE MEASURED WITH AN ACCURACY OF APPROXIMATELY +OR- 0.3 CM/SUP 3/.MOL/SUP -1/. THE GAUGE AND A LOSCHMIDT CELL HAVE BEEN USED TO MEASURE B/SUP E/ VALUES FOR THE SYSTEM HE-N/SUB 2/, WHICH AGREE WELL WITH THE DATA REPORTED IN THE LITERATURE.
Desc.: PRESSURE TRANSDUCERS; HIGH-PRESSURE TECHNIQUES; QUARTZ; EQUATIONS OF STATE
Ident.: PRESSURE GAUGES; EQUATIONS OF STATE; QUARTZ SPIRAL GAUGE; INTERACTION SECOND VIRIAL COEFFICIENTS; LOSCHMIDT CELL B/SUP E/; HE-N/SUB 2/
Class Codes: A0735; A6430; B7320V

Y027013 104 
859519 B82026842
'A MINIATURE PRESSURE SENSOR FOR AUTOMOTIVE APPLICATIONS'
BEHR, M.
ISATA 81 PROCEEDINGS. 10TH ANNIVERSARY INTERNATIONAL SYMPOSIUM ON AUTOMOTIVE TECHNOLOGY AND AUTOMATION 69/1-13 VOL.2 1981
7-11 SEPT. 1981 STOCKHOLM, SWEDEN
Publ: AUTOMOTIVE AUTOM., CROYDON, SURREY, ENG.
2 VOL. 1060 pp.
Treatment: PRACTICAL
Doc. Type: CONF. PAP.
Lang.: ENG. (5 Refs)
A MINIATURE SILICON CAPACITANCE ABSOLUTE PRESSURE SENSOR (SCAP) IS DISCUSSED IN DETAIL. THE CONSTRUCTION AND MANUFACTURE OF THESE SENSORS IS DESCRIBED. THE CAPACITANCE, THERMAL COEFFICIENT OF CAPACITANCE AND SENSITIVITY OF THE SENSOR IS EVALUATED IN TERMS OF A SATISFACTORY MODEL BASED ON AVERAGE DIAPHRAGM DISPLACEMENT. ADVANTAGES OF CAPACITANCE DEVICES OVER PIEZORESISTIVE STRAIN GAUGE PRESSURE DEVICES ARE CONSIDERED.
Desc.: ELECTRIC SENSING DEVICES; PRESSURE MEASUREMENT
Ident.: MINIATURE PRESSURE SENSOR; MINIATURE SILICON CAPACITANCE ABSOLUTE PRESSURE SENSOR; SCAP; MANUFACTURE; CAPACITANCE; THERMAL COEFFICIENT; DIAPHRAGM DISPLACEMENT; CAPACITANCE DEVICES
Class Codes: B7230; B7320V

Y027013 105 
844975 B82022660 
INSTRUMENTED BEAM STABILITY EVALUATION (AIRBORNE STRESS TRANSDUCER TESTING)
FRANCIS, E.C.; THOMPSON, R.R.
CHEM. SYSTEMS DIV., UNITED TECHNOL., SUNNYVALE, CA, USA
INSTRUMENTATION IN THE AEROSPACE INDUSTRY. VOL.27. ADVANCES IN TEST MEASUREMENT. VOL.18. PROCEEDINGS OF THE 27TH INTERNATIONAL INSTRUMENTATION SYMPOSIUM 665-7 PART 2 1981
27-30 APRIL 1981 INDIANAPOLIS, IN, USA
Publ: ISA, RESEARCH TRIANGLE PARK, NC, USA
2 VOL. 784 pp. ISBN 0 87664 515 5
Treatment: EXPERIMENTAL
Doc. Type: CONF. PAP.
Lang.: ENG. (3 Refs)
THE ACCURATE AND RELIABLE MEASUREMENT OF BOND STRESS IN A SOLID PROPELLANT ROCKET MOTOR IS A DIFFICULT TASK BECAUSE THE TRANSDUCERS ARE EMBEDDED IN A CORROSIVE ENVIRONMENT AND MUST BE ELECTRICALLY STABLE FOR UP TO 10 YEARS. TO STUDY THE LONG TERM STABILITY BEHAVIOR OF STRESS TRANSDUCERS, AN INSTRUMENTED BEAM TEST UNDER CONSTANT LOAD AND AT VARIOUS TEMPERATURES HAS BEEN UNDERTAKEN WHICH EMPLOYS ALL THE COMPONENTS OF A MINIATURE STRESS TRANSDUCER, NAMELY THE 15-5 STAINLESS STEEL (WITH SPECIAL METAL CONDITIONING) OF THE HOUSING AND DIAPHRAGM, THE SEMICONDUCTOR STRAIN GAGES AND THE BRIDGE COMPLETION AND TEMPERATURE COMPENSATION RESISTORS. THE TEST RESULTS AND INTERIM CONCLUSIONS OF OVER THREE YEARS OF CONTINUOUS TESTING OF INSTRUMENTED BEAMS AT 160 DEGREES, 120 DEGREES, AND 90 DEGREESF ARE PRESENTED.
Desc.: PRESSURE TRANSDUCERS; STRAIN GAUGES; AEROSPACE INSTRUMENTATION; ELECTRONIC EQUIPMENT TESTING; ROCKETS; STRESS MEASUREMENT
Ident.: 160 DEGREES F; 120 DEGREES F; ADHESION; MEASUREMENT OF BOND STRESS; SOLID PROPELLANT ROCKET MOTOR; LONG TERM STABILITY; STRESS TRANSDUCERS; INSTRUMENTED BEAM TEST; 15-5 STAINLESS STEEL; SEMICONDUCTOR STRAIN GAGES; 90DEGREES F
Class Codes: B7630; B7230

Y027013 106 
832468 A82030261, B82017172
TUBING SYSTEMS FOR THE MEASUREMENT OF FLUCTUATING PRESSURES IN WIND ENGINEERING
GUMLEY, S.J.
Issued by: UNIV. OXFORD, ENG.;
1981
266 pp.
Report No.: OUEL-1370/81
Treatment: GENERAL, REVIEW
Doc. Type: REPORT
Lang.: ENG. (81 Refs)
THE MEASUREMENT OF SURFACE PRESSURE ON WIND TUNNEL MODELS HAS BEEN STUDIED IN DETAIL FOR MANY YEARS. THE APPLICATIONS RANGE FROM SUPERSONIC TURBINE BLADES TO LOW SPEED WIND ENG.RING AND VARIOUS FULL SCALE MEASUREMENTS ON ENG. AND OTHER ENG.RING STRUCTURES. MEASUREMENTS CAN BE MADE USING HYDRAULIC, PNEUMATIC OR ELECTRICAL/ELECTRONIC TECHNIQUES EITHER SINGLY OR IN COMBINATION. ONE POPULAR METHOD OF PRESSURE MEASUREMENT IS THE PRESSURE TRANSDUCER (PIEZO OR CAPACITANCE TYPE) WITH SUITABLE AMPLIFYING AND FILTERING ELECTRONIC CIRCUITRY. THE PNEUMATIC TUBING SYSTEM CONNECTING MODEL SURFACES TO THE PRESSURE SWITCHING DEVICE INTRODUCES AMPLITUDE AND PHASE DISTORTIONS IN PRESSURE SIGNALS. ONE OF THE OBJECTS OF THE REPORT IS TO SHOW HOW THE DISTORTIONS CAN BE QUANTIFIED, AND HOW TUBING SYSTEMS CAN BE DESIGNED TO OVERCOME THE DISTORTION PROBLEM (SO THAT ONE MEASURES THE PRESSURE AT THE SURFACE, AND NOT SOME OTHER PRESSURE AS MODIFIED BY AN UNKNOWN TRANSFER FUNCTION CAUSED BY THE PRESENCE OF THIS PNEUMATIC TUBING).
Desc.: PRESSURE MEASUREMENT; PRESSURE TRANSDUCERS; WIND TUNNELS; REVIEWS
Ident.: PIEZO TYPE TRANSDUCER; AMPLITUDE DISTORTIONS; SURFACE PRESSURE; WIND TUNNEL MODELS; SUPERSONIC TURBINE BLADES; LOW SPEED WIND ENG.RING; ENG.; ENG.RING STRUCTURES; PRESSURE TRANSDUCER; CAPACITANCE TYPE; PNEUMATIC TUBING SYSTEM; PRESSURE SWITCHING DEVICE; PHASE DISTORTIONS; TRANSFER FUNCTION
Class Codes: A4780; A0130R; B7320V

Y027013 107 
827126 A82026481, B82014674
EFFECT OF PRESSURE ON AVALANCHE BREAKDOWN VOLTAGE OF GALLIUM ANTIMONIDE, GALLIUM ARSENIDE AND GALLIUM PHOSPHIDE P-N JUNCTIONS
MOESCHKE, B.; WLODARSKI, W.
WARSAW TECH. UNIV., WARSAW, POLAND
BULL. ACAD. POL. SCI. SER. SCI. TECH. (POLAND) VOL.28, NO.5-6 245-51
1980 CODEN: BAPTA9
Treatment: PRACTICAL; THEORETICAL
Doc. Type: JRNL PAP.
Lang.: ENG. (10 Refs)
ANALYSES THE EFFECT OF HYDROSTATIC PRESSURE ON THE AVALANCHE BREAKDOWN VOLTAGE OF GALLIUM ANTIMONIDE, GALLIUM ARSENIDE AND GALLIUM PHOSPHIDE P-N JUNCTIONS. UNSYMMETRIC STEP JUNCTION OF PLANAR, CYLINDRICAL AND SPHERICAL GEOMETRICAL STRUCTURES ARE CONSIDERED. IT IS SHOWN THAT CONVERSION CHARACTERISTICS OF THE JUNCTIONS AS DIRECT PRESSURE TRANSDUCERS ARE LINEAR AND THAT SENSITIVITY IS A FUNCTION OF THE SEMICONDUCTOR MATERIAL, THE DEPTH OF METALLURGIC JUNCTION, DOPING AND THE JUNCTION GEOMETRY. PARTICULARLY HIGH VALUES OF SENSITIVITY ARE CHARACTERISTIC FOR THE GASB AND GAAS JUNCTIONS. THEORETICAL RESULTS WERE COMPARED WITH EXPERIMENTAL VALUES AND GOOD AGREEMENT WAS FOUND.
Desc.: GALLIUM COMPOUNDS; ANTIMONY COMPOUNDS; HIGH-PRESSURE EFFECTS IN SOLIDS; III-V SEMICONDUCTORS; P-N HOMOJUNCTIONS; P-N HOMOJUNCTIONS; III-V SEMICONDUCTORS; HIGH-PRESSURE EFFECTS IN SOLIDS; ARSENIC COMPOUNDS; GALLIUM COMPOUNDS; GALLIUM COMPOUNDS; PHOSPHORUS COMPOUNDS; III-V SEMICONDUCTORS; HIGH-PRESSURE EFFECTS IN SOLIDS; P-N HOMOJUNCTIONS
Ident.: GASB JUNCTIONS; GAP JUNCTIONS; HIGH PRESSURE EFFECTS; AVALANCHE BREAKDOWN VOLTAGE; HYDROSTATIC PRESSURE; P-N JUNCTIONS; STEP JUNCTIONS
Class Codes: A7340L; B2530B

Y027013 108 
813634 B82011991
PROBLEMS OF TEMPERATURE COMPENSATION DURING DIRECT MEASUREMENT OF AERODYNAMIC PRESSURES
GATZEK, W.
DFVLR, AERODYNAMISCHE VERSUCHSANSTALT GOTTINGEN, GOTTINGEN, GERMANY
ICIASF'81 RECORD. INTERNATIONAL CONGRESS ON INSTRUMENTATION IN AEROSPACE SIMULATION FACILITIES 6-16 1981
30 SEPT. 1981 DAYTON, OH, USA
Publ: IEEE, NEW YORK, USA
300 pp.
Treatment: PRACTICAL
Doc. Type: CONF. PAP.
Lang.: ENG. (5 Refs)
IN DETERMINING STEADY AND UNSTEADY PRESSURE DISTRIBUTIONS OF WIND TUNNEL MODELS, DIRECT MEASUREMENT IS USUALLY PREFERRED OVER THE INDIRECT PROCEDURE. INSTEAD OF THE PREVIOUSLY USED MULTIPLEXERS, ULTRASONIC MINIATURE PRESSURE PICKUPS, ARE INSTALLED IN THE INDIVIDUAL MEASURING DRILLS ELIMINATING THE NEED FOR HOSE LINES. THIS PROCEDURE IS ESPECIALLY ADVANTAGEOUS FOR DYNAMIC MEASUREMENT OF PRESSURE DISTRIBUTIONS, DEMANDING FROM THE MINIATURE PRESSURE PICKUPS CONSIDERABLE TEMPERATURE STABILITY DUE TO CONSTANTLY RISING TEMPERATURES OF THE WIND TUNNEL AIR FLOW. A TEMPERATURE-STABILIZED WHEATSTONE BRIDGE CIRCUIT, WHICH MEETS THE REQUIREMENTS FOR A HIGH DEGREE OF MEASURING PRECISION IS DESCRIBED.
Desc.: WIND TUNNELS; COMPENSATION; PRESSURE MEASUREMENT; ULTRASONIC TRANSDUCERS; BRIDGE CIRCUITS; PRESSURE TRANSDUCERS
Ident.: PRESSURE MEASUREMENT; ULTRASONIC TRANSDUCERS; TEMPERATURE COMPENSATION; WIND TUNNEL MODELS; ULTRASONIC MINIATURE PRESSURE PICKUPS; DYNAMIC MEASUREMENT OF PRESSURE DISTRIBUTIONS; TEMPERATURE STABILITY; WHEATSTONE BRIDGE CIRCUIT
Class Codes: B7620; B7320V; B7810C; B7230

Y027013 109 
813248 A82016407, B82011479
THE MEASUREMENT OF BLAST-PRESSURE FIELDS
EDWARDS, D.G.; SMITH, R.M.
MECH. ENG.DEPT., UNIV. OF SURREY, GUILDFORD, ENG.
ICIASF'81 RECORD. INTERNATIONAL CONGRESS ON INSTRUMENTATION IN AEROSPACE SIMULATION FACILITIES 107-12 1981
30 SEPT. 1981 DAYTON, OH, USA 
Publ: IEEE, NEW YORK, USA
300 pp.
Treatment: PRACTICAL
Doc. Type: CONF. PAP.
Lang.: ENG. (5 Refs)
DESCRIBES THE DEVELOPMENT OF BLAST GAUGES FOR USE IN THE NEAR-FIELD. A METHOD OF MOUNTING EXISTING PIEZOELECTRIC PRESSURE TRANSDUCERS WHILST ISOLATING THE ACTIVE ELEMENTS FROM VIBRATION, HAS BEEN EVOLVED. A MINIATURE BLAST GAUGE HAS ALSO BEEN DESIGNED WHICH TAKES ADVANTAGE OF MICRO-ELECTRONICS TECHNOLOGY.
Desc.: PRESSURE MEASUREMENT; PRESSURE TRANSDUCERS; EXPLOSIONS; SHOCK WAVES; PIEZOELECTRIC TRANSDUCERS 
Ident.: NEAR FIELD MEASUREMENT; PIEZOELECTRIC TRANSDUCER; SHOCK WAVES; EXPLOSIONS; MEASUREMENT OF BLAST-PRESSURE FIELDS; PRESSURE TRANSDUCERS; MINIATURE BLAST GAUGE
Class Codes: A4780; A4740N; B7230; B7320V; B2860

Y027013 110 
805839 A82016406
INSTRUMENTATION FOR THE MEASUREMENT OF BLAST WAVES ATTENUATED BY WATER SHEETS 
WALKER, G.; EAST, R.A.
DEPT. OF AERONAUTICS. AND ASTRONAUTICS, UNIV. OF SOUTHAMPTON, SOUTHAMPTON, ENG.
ICIASF'81 RECORD. INTERNATIONAL CONGRESS ON INSTRUMENTATION IN AEROSPACE SIMULATION FACILITIES 98-106 1981
30 SEPT. 1981 DAYTON, OH, USA
Publ: IEEE, NEW YORK, USA
300 pp.
Treatment: EXPERIMENTAL
Doc. Type: CONF. PAP.
Lang.: ENG. (18 Refs)
THE REPORTED INVESTIGATION CONCERNS MEASUREMENTS OF BLAST PRESSURE AND FLOW STRUCTURE IN THE REGION SURROUNDING THE OPEN END OF A TUBE FROM WHICH A SHOCK WAVE EMERGES. MINIATURE BLAST PRESSURE GAUGES ARE USED TO MEASURE BLAST STRENG.ND SCHLIEREN PHOTOGRAPHY PROVIDES ADDITIONAL FLOW DETAILS. DIGITAL DATA ACQUISITION, PROCESSING AND FILTERING TECHNIQUES ARE DESCRIBED WHICH IMPROVE THE DATA QUALITY. THE TECHNIQUES ARE ALSO APPLIED TO THE RELATED PROBLEM OF A SHOCK EMERGING BETWEEN WATER SHEET TUBE EXTENSIONS INTO THE ATMOSPHERE. RESULTS ARE DESCRIBED WHICH SHOW THAT REDUCTIONS OF SOUND PRESSURE LEVEL OF ABOUT 14 DB MAY BE ACHIEVED AT CERTAIN POSITIONS NEAR THE TUBE EXIT AS A RESULT OF THE WATER SHEETS.
Desc.: FLOW MEASUREMENT; PHOTOGRAPHIC APPLICATIONS; SCHLIEREN SYSTEMS; SHOCK TUBES; SHOCK WAVES; PRESSURE TRANSDUCERS; NOISE ABATEMENT
Ident.: MINIATURE BLAST PRESSURE GAUGE; FLOW MEASUREMENT; BLAST ATTENUATION; NOISE ABATEMENT; SHOCK WAVES; SHOCK TUBES; MEASUREMENT OF BLAST WAVES; MEASUREMENTS OF BLAST PRESSURE; SCHLIEREN PHOTOGRAPHY; DATA ACQUISITION; FILTERING; REDUCTIONS OF SOUND PRESSURE LEVEL; WATER SHEETS
Class Codes: A4780; A4740N; A4280N; A4350; A670J

Y027013 111 
783702 A82002648
THE USE OF MANGANIN GAUGES IN SHOCK REVERBERATION EXPERIMENTS
ROSENBERG, Z.
ARMAMENT DEVL AUTHORITY, STATE OF ISRAEL MINISTRY OF DEFENCE, HAIFA, ISRAEL
J. APPL. PHYS. (USA) VOL.52, NO.6 4000-2 JUNE 1981 CODEN: JAPIAU
Treatment: APPLIC; EXPERIMENTAL
Doc. Type: JRNL PAP.
Lang.: ENG. (9 Refs)
THE USE OF MANGANIN GAUGES IN SHOCK REVERBERATION EXPERIMENTS IS DEMONSTRATED IN THREE EXPERIMENTAL CONFIGURATIONS. IN THE FIRST ONE THE AUTHOR DETERMINES THE HUGONIOT CURVE FOR AN EPOXY RESIN, IN THE 0-8.-GPA RANGE, BY A SINGLE EXPERIMENT USING COPPER AS ANVIL MATERIAL. IN THE SECOND HE MEASURES THE DEGREE OF COMPACTION OF POROUS POLYURETHANE FROM THE MAGNITUDE OF THE SECOND SHOCK WAVE IN A REVERBERATION EXPERIMENT. IN THE THIRD HE DETERMINES RELEASE STATES OF SHOCKED POLYMETHYLMETHACRYLATE (PMMA). THE RESULTS ARE COMPARED TO THOSE OBTAINED BY OTHER TECHNIQUES OR BY THE REVERBATION TECHNIQUE WITH QUARTZ TRANSDUCERS.
Desc.: DYNAMIC TESTING; COPPER ALLOYS; MANGANESE ALLOYS; NICKEL ALLOYS; HIGH-PRESSURE TECHNIQUES; SHOCK WAVE EFFECTS; POLYMERS; POLYMERS SHOCK WAVE EFFECTS; SHOCK WAVE EFFECTS; POLYMERS
Ident.: SHOCK REVERBERATION EXPERIMENTS; MANGANIN GAUGE; HUGONIOT CURVE; EPOXY RESIN; COMPACTION; POROUS POLYURETHANE; RELEASE STATES; SHOCKED POLYMETHYLMETHACRYLATE
Class Codes: A8170; A0735; A4630R; A6250

Y027013 112 
765495 A81096215, B81048072
RESISTANCE STRAIN GAUGE PRESSURE TRANSDUCER FOR 1.4 GPA
TRANSDUCER TECHNOL. (GB) VOL.3, NO.3 10-13 MARCH 1981 CODEN: TTECDX
Treatment: PRACTICAL
Doc. Type: JRNL PAP.
Lang.: ENG. (11 Refs)
DISCUSSES THE DEVELOPMENT OF HIGH PRESSURE TRANSDUCERS FOR INDUSTRIAL APPLICATIONS, PARTICULAR ATTENTION BEING PAID TO THE SELECTION OF SUITABLE MATERIALS FOR THE STRUCTURAL PARTS OF THE TRANSDUCERS AND TO THE PARAMETERS AFFECTING THE MAGNITUDE OF THE ELECTRICAL OUTPUT SIGNALS GENERATED BY THE RESISTANCE STRAIN GAUGES. THE ADVANTAGES OF USING NICKEL MARAGING STEELS FOR THE STRAIN GAUGES ARE EMPHASIZED.
Desc.: ALLOY STEEL; NICKEL ALLOYS; STRAIN GAUGES; PRESSURE TRANSDUCERS 
Ident.: PRESSURE TRANSDUCER; 1.4 GPA; MARAGING STEELS; RESISTANCE STRAIN GAUGE; NI STEEL
Class Codes: A4630R; A0710; B7230

Y027013 113 
759620 A81084013, B81048049
A SENSITIVE AND LINEAR PRESSURE TRANSDUCER
REHMAN, M.; MURTI, V.G.K.
ELECTRICAL ENG. DEPT., INDIAN INST. OF TECHNOL., MADRAS, INDIA
J. PHYS. E (GB) VOL.14, NO 8 988-91 AUG. 1981 CODEN: JPSIAE
Treatment: NEW DEVELOPMENTS; PRACTICAL
Doc. Type: JRNL PAP.
Lang.: ENG. (9 Refs)
THE PRINCIPLE, CONSTRUCTION AND PRELIMINARY TEST RESULTS OF A NEW CAPACITIVE PRESSURE TRANSDUCER ARE PRESENTED. THE UNIT CONSTRUCTED MAY BE USED FOR THE MEASUREMENT OF DIFFERENTIAL PRESSURE IN THE MEDIUM AND LOW RANGES. THE PRIMARY SENSOR IS A U-TUBE MANOMETER, COMPRISED OF TWO TEFLON TUBES FILLED WITH MERCURY. THE TWO TUBES ARE PLACED COAXIALLY THROUGH THE CENTRAL SPACES OF TWO CYLINDRICAL CROSS-CAPACITORS BUILT IN THE SAME BASE. DUE TO THE SHIELDING EFFECT OF MERCURY IN THE U-TUBE, CHANGES IN THE CAPACITANCE OF THE TWO CROSS CAPACITORS OCCUR WHENEVER PRESSURE IS APPLIED. THESE CHANGES IN CAPACITANCE ARE MEASURED, EMPLOYING AN INDUCTIVE VOLTAGE DIVIDER (IVD) IN A TRANSFORMER BRIDGE SET-UP, IN TERMS OF THE VALUE OF A STANDARD CAPACITOR. BESIDES ITS EXTREMELY HIGH SENSITIVITY AND LINEARITY, THE SCHEME IS CONSIDERED CAPABLE OF ACHIEVING A HIGH ORDER OF ACCURACY AND APPEARS SUITABLE FOR THE CALIBRATION OF OTHER TYPES OF DIFFERENTIAL PRESSURE GAUGES.
Desc.: PRESSURE TRANSDUCERS
Ident.: LINEAR PRESSURE TRANSDUCER; CAPACITIVE; DIFFERENTIAL PRESSURE; U-TUBE MANOMETER; MERCURY; INDUCTIVE VOLTAGE DIVIDER; TRANSFORMER BRIDGE; SENSITIVITY
Class Codes: A0670M; B7230; B7320V

Y027013 114 
754352 A81091276
SHOCK WAVE VELOCITY MEASUREMENT BY LASER BEAM SHEAR DISPLACEMENT TECHNIQUE
JAI KI KIM; UNG KIM; SANG SOO LEE
KOREA ADVANCED INST. OF SCI., SEOUL, KOREA
NEW PHYS. (KOREAN PHYS. SOC.) VOL.21, NO.1 3-7 MARCH 1981 CODEN: ?WPYA4
Treatment: EXPERIMENTAL
Doc. Type: JRNL PAP.
Lang.: KOREAN (9 Refs)
THE DIAPHGRAM SEPARATING NITROGEN GAS AT HIGH PRESSURE FROM THAT AT LOW PRESSURE IS BURST AND A SHOCK WAVE TRAVELLING FORWARD TO THE LOW PRESSURE CHAMBER AND THE RAREFACTION WAVE TRAVELLING BACK TO THE HIGH PRESSURE CHAMBER ARE GENERATED. IN THIS EXPERIMENT, THE VELOCITIES OF THE SHOCK WAVES ARE MEASURED BY TWO DIFFERENT METHODS; USING A PRESSURE TRANSDUCER AND EMPLOYING LASER BEAM SHEAR DISPLACEMENT. WHEN A HE-NE LASER BEAM TRAVERSES THE WINDOWS ACROSS THE TRAVELLING SHOCK WAVE, IT IS TRANSVERSELY DISPLACED BY THE SHOCK PRESSURE INDUCED TILT OF THE WINDOW PLATE, SO THAT THE LASER BEAM COVERAGE ON THE DETECTOR APERTURE CHANGES. THIS CHANGE PRODUCES CHANGE IN THE OUTPUT OF THE PHOTODIODE. IN THE PRESENT EXPERIMENT, TWO PAIRS OF WINDOWS SEPARATED BY 10 CM GIVE TWO SEPARATE PHOTODIODE OUTPUTS, SND FROM THE TIME INTERVALS OF TWO VOLTAGE SIGNALS, THE VELOCITY OF THE SHOCK WAVE IS DETERMINED. THE RESULTS OBTAINED BY THIS LASER OPTICAL METHOD ACCURATELY AGREE WITH THOSE OBTAINED FROM THE METHOD OF USING A PAIR OF PRESSURE TRANSDUCERS.
Desc.: NITROGEN; SHOCK WAVES; LASER BEAM APPLICATIONS
Ident.: LASER BEAM SHEAR DISPLACEMENT; REREFACTION WAVE; PRESSURE TRANSDUCER; N/SUB 2/; SHOCK WAVE VELOCITY
Class Codes: A4740N

Y027013 115 
725766 A8101585
HIGH TEMPERATURE, HIGH PRESSURE WATER LEVEL SENSOR
MILLER, G.N.; ANDERSON, R.L.; ROGERS, S.C.; LYNNWORTH, L.C.; STUDLEY, W.B.; WADE, W.R.
OAK RIDGE NAT. LAB., OAK RIDGE, TN, USA;
MCAVOY, B.R. (Editors)
Sponsor: IEEE
1980 ULTRASONICS SYMPOSIUM PROCEEDINGS 877-81 VOL.2 1980
5-7 NOV. 1980 BOSTON, MA, USA
Pub: IEEE, NEW YORK, USA
2 VOL. 1089 pp.
Treatment: PRACTICAL
Doc. Type: CONF. PAP.
Lang.: ENG. (6 Refs)
A SENSOR WAS DEVELOPED TO MEASURE WATER LEVEL OVER A RANGE OF 750 MM WITH AN UNCERTAINTY OF +O- 20 MM AT A TEMPERATURE FROM 20 TO 250 DEGREESC AND PRESSURE UP TO 15.2 MPA. THE SENSOR IS TYPE 304, FLATTENED STAINLESS STEEL ROD. ITS CROSS SECTION IS 1.6*3.2 MM AND ITS MEASURED TORSIONAL TRANSIT TIME IS A FUNCTION OF WATER DENSITY RHO, LEVEL L AND TEMPERATURE T. TO MINIMIZE THE INFLUENCE OF T, THE EXTENSIONAL TRANSIT TIME IS ALSO MEASURED IN THE SAME SENSOR. TO INTERROGATE THE SENSOR WITH BOTH MODES, JOULE AND WIEDEMANN TRANSDUCERS ARE MULTIPLEXED IN AN ALTERNATING SEQUENCE. EXPERIMENTAL RESULTS, PROBLEMS AND REMEDIES ARE DISCUSSED.
Desc.: LEVEL MEASUREMENT; NUCLEAR REACTOR INSTRUMENTATION
Ident.: WATER LEVEL SENSOR; FLATTENED STAINLESS STEEL ROD; TORSIONAL WAVE SENSOR; NUCLEAR REACTOR INSTRUMENTATION
Class Codes: A0630C; A2845E

Y027013 116 
723497 A81069161
SAMPLE DEVICE FOR MEASURING THE RELATIVE THERMAL CONDUCTIVITY OF GASES
KOTOUSOV, L.S.; MEZRINA, L.A.; POPOV, YU.I.; SOROKINA, N.V.
V.I. UL'YANOV LENINGRAD ELECTROTECH. INST., LENINGRAD, USSR
ZH. TEKH. FIZ. (USSR) VOL.50, NO.7 1?92-6 JULY 1980 CODEN: ZTEFA3
Trans in: SOV. PHYS.-TECH. PHYS. (USA) VOL.25, NO.7 864-6 JULY 1980 CODEN: SPTPA3
Treatment: THEORETICAL; EXPERIMENTAL
Doc. Type: JRNL PAP.
Lang.: ENG. (9 Refs)
BY EMPLOYING A THERMAL-CONDUCTIVITY TRANSDUCER (A MINIATURE SEMICONDUCTOR THERMISTOR) IN THE WORKING CHANNEL OF A CELL, SYSTEMATIC ERRORS RESULTING FROM THE THERMAL EFFECTS OF CONVECTION AND PRESSURE VARIATIONS ARE LIMINATED, AND THOSE DUE TO END EFFECTS AND RADIATION ARE SUBSTANTIALLY REDUCED. THE METHOD DISCUSSED REQUIRES ONLY ONE OR TWO STANDARD MATERIALS AND DOES NOT NECESSITATE AN INVESTIGATION OF THE EFFECTIVE THERMAL CONDUCTIVITY AS A FUNCTION OF THE GAS PRESSURE. MEASURED VALUES OF THE THERMAL CONDUCTIVITY OF A NITROGEN-HELIUM MIXTURE AT 296.7K AND 0.4 BAR ARE PRESENTED.
Desc.: THERMAL CONDUCTIVITY OF GASES; NITROGEN; HELIUM; THERMAL VARIABLES MEASUREMENT
Ident.: RELATIVE THERMAL CONDUCTIVITY; GASES; THERMAL-CONDUCTIVITY TRANSDUCER; THERMAL EFFECTS
Class Codes: A5130; A?720

Y027013 117 
712050 A81061661
EFFECT OF HIGH PRESSURE ON THE ELASTIC CONSTANTS OF THE MATERIAL IN THE SENSITIVE ELEMENT OF A PRESSURE MEASUREMENT TRANSDUCER
KOLTAKOV, V.K.; GOLOVENKO, V.S.; OVCHARENKO, S.YA.; ROMASHIN, V.A.
IZMER. TEKH. (USSR) VOL.23, NO.5 27-8 MAY 1980 CODEN: IZTEAW
Trans in: MEAS. TECH. (USA) VOL.23, NO.5 403-4 MAY 1980 CODEN: MSTCAL
Treatment: EXPERIMENTAL
Doc. Type: JRNL PAP.
Lang.: ENG. (8 Refs)
THE AUTHORS ESTIMATE THE INFLUENCE OF HIGH PRESSURES ON THE ELASTIC CONSTANTS OF 35CRMNS A STEEL AND THE INDICATIONS OF A PMT WITH FREQUENCY OUTPUT, WHEN THE BODY OF THE TRANSDUCER IS MADE OUT OF THIS TYPE OF STEEL. TESTS WERE CARRIED OUT ON TESTPIECES IN A SPECIAL INSTALLATION, WHICH ENABLED ONE TO OBTAIN THE DEFORMATION OF TESTPIECES UNDER LOAD WITH THE AID OF GLUED-ON STRAIN GAUGES. THE CHANGES IN THE VOLUME OF THE TESTPIECES WERE ALSO MEASURED.
Desc.: PRESSURE TRANSDUCERS; ELASTIC CONSTANTS; HIGH-PRESSURE EFFECTS IN SOLIDS; ALLOY STEEL; ELASTIC DEFORMATION; CHROMIUM ALLOYS; MANGANESE ALLOYS; SILICON ALLOYS
Ident.: ELASTIC CONSTANTS; PRESSURE MEASUREMENT TRANSDUCER; 35CRMNSIA STEEL; DEFORMATION; HIGH PRESSURE EFFECT; VOLUME CHANGE
Class Codes: A8140J; A0670M; A6220D; A8140L; A6250; A6220F; A6250

Y027013 118 
709306 A81058732, B81030106
PIEZORESISTIVE PRESSURE SENSOR WITH SILICON DIAPHRAGM
BREIMESSER, F.; POPPINGER, M.; SCHWAIER, A.
SIEMENS AG, ERLANGEN, GERMAN
SIEMENS FORSCH.- AND ENTWICKLUNGSBER. (GERMANY) VOL.10, NO.2 72-7 1981 CODEN: SFEBBL
Treatment: APPLIC; PRACTICAL
Doc. Type: JRNL PAP.
Lang.: ENG. (7 Refs)
THE PHYSICAL PRINCIPLE, STRUCTURE AND FABRICATION PROCESS ARE DESCRIBED AND THE INTERRELATIONSHIPS WITH THE PROPERTIES OF THE PRESSURE SENSOR ARE DISCUSSED. MEASURED RESULTS ON SPECIMENS OF A FAMILY OF PRESSURE SENSORS PRODUCED FOR NOMINAL MEASURING RANGES BETWEEN 0.1 BAR AND 200 BAR AGREE WELL WITH THE CALCULATED CHARACTERISTICS. DESIGN EXAMPLES AND FIELDS OF APPLICATION IN INDUSTRIAL USE ARE OUTLINED AND THE ADVANTAGES, AS COMPARED WITH OTHER METHODS OF PRESSURE MEASUREMENT, ARE POINTED OUT. SOME DEVELOPMENT TRENDS FOR THE PRESSURE SENSOR IN SILICON TECHNOLOGY ARE MENTIONED.
Desc.: PRESSURE TRANSDUCERS; PRESSURE MEASUREMENT; PIEZOELECTRIC TRANSDUCERS
Ident.: 0.1 BAR; 200 BAR; SI DIAPHRAGM; PIEZORESISTIVE PRESSURE SENSOR; INDUSTRIAL APPLICATIONS
Class Codes: A0670D; A0735; B7230; B7320V; B2860

Y027013 119 
682975 A81042445
CAVITATION PHENOMENA AND THE OCCURRENCE OF PRESSURE-TENSION CYCLES UNDER DYNAMIC STRESSING
OVERTON, G.D.N.; TREVENA, D.H.
DEPT. OF PHYS., UNIV. COLL. OF WALES, ABERYSTWYTH, WALES
J. PHYS. D (GB) VOL.14, NO.2 241-50 14 FEB. 1981 CODEN: JPAPBE
Treatment: PRACTICAL; EXPERIMENTAL
Doc. Type: JRNL PAP.
Lang.: ENG. (13 Refs)
TWO DIFFERENT METHODS OF SUBJECTING A LIQUID TO TENSION UNDER DYNAMIC CONDITIONS ARE DESCRIBED. IN THE FIRST METHOD A TENSION PULSE IS CREATED AB INITIO IN A COLUMN OF WATER AND THE RESULTING PRESSURE-TENSION CYCLES ARE MONITORED BY A PRESSURE TRANSDUCER. THESE CYCLIC PRESSURE VARIATIONS HAVE BEEN OBSERVED BY EARLIER WORKERS BUT NO ADEQUATE EXPLANATION OF THEIR OCCURRENCE HAS BEEN PREVIOUSLY GIVEN; SUCH AN EXPLANATION IS PROPOSED IN THE PRESENT PAPER. SECONDLY, A DEVELOPMENT OF THE BULLET-PISTON METHOD USED BY COUZENS AND TREVENA (1974) IS DESCRIBED IN WHICH A NEW WAY OF OBTAINING AND PRESENTING THE EXPERIMENTAL RESULTS IS REPORTED.
Desc.: CAVITATION; HIGH-PRESSURE TECHNIQUES; HIGH-PRESSURE PHENOMENA AND EFFECTS
Ident.: DYNAMIC STRESSING; TENSION PULSE; WATER; PRESSURE-TENSION CYCLES; PRESSURE TRANSDUCER; CYCLIC PRESSURE VARIATIONS; BULLET-PISTON METHOD CAVITATION
Class Codes: A6210; A0735; A4755B

Y027013 120 
681474 A81040788, B81021443, C81013802
AUTOMATION TECHNIQUES FOR DETERMINING TEST VALUES AND MEASURANDS IN HIGH-PRESSURE CHEMICAL PLANTS (ND 325) (RATED PRESSURE GRADE 325) FOR THE EXPORT TO THE SOVIET UNION. II
JENNES, H.; ORTLEPP, L.
VEG GERATE UND REGLER-WERKE, TELTOW, GERMANY
TECH. INF. GRW (GERMANY) VOL.18, NO.3 187-92 1980 CODEN: TIGRB9
Treatment: PRACTICAL
Doc. Type: JRNL PAP.
Lang.: GERMAN (18 Refs)
FOR PT.I SEE IBID., VOL.18, NO.2, P.97-104, 1980. PRESENTS A DESCRIPTION OF THE TECHNICAL DETAILS OF THERMOMETERS AND TEMPERATURE SENSORS TOGETHER WITH THEIR PROTECTIVE TUBES AS REQUIRED FOR USE WITH HIGH-PRESSURE CHEMICAL REACTORS WORKING AT HIGH TEMPERATURES. MANY SCALED DRAWINGS ARE PROVIDED TO ILLUSTRATE AND EXEMPLIFY THE TEXT. THE BASIC RULES AND REGULATIONS OF THE DDR (GERMAN DEMOCRATIC REPUBLIC) I.E. THE TLG'S CORRESPONDING TO THE WEST GERMAN DIN'S ARE DISCUSSED IN RELATION TO THE REQUIREMENTS OF THE RUSSIAN REGULATIONS FOR PLANNING, MANUFACTURE, PROOF AND ATTESTATION, AND DELIVERY OF SECTIONAL FORMS, FITTINGS AND DEVICE.
Desc.: TEMPERATURE MEASUREMENT; THERMOMETERS; HIGH-PRESSURE TECHNIQUES
Ident.: HIGH-PRESSURE CHEMICAL PLANTS; THERMOMETERS; TEMPERATURE SENSORS; CHEMICAL REACTORS
Class Codes: A0720D; A0735; B7230; B7320R; C3240; C3120N

Y027013 121 
670217 A81034403
EXPERIMENTAL AND NUMERICAL DETERMINATION OF STRESS AND FLOW PATTERNS IN LARGE AXIAL COMPRESSION OF ALUMINIUM CYLINDERS
BROUHA, M.; DE JONG, J.E.; GALENKAMP, H.
PHILIPS ES. LABS., EINDHOVEN, NETHERLANDS
VODAR, B.; MARTEAU, P. (Editors)
Sponsor: EUROPEAN PHYS. SOC.; ET AL.
HIGH PRESSURE SCIENCE AND TECHNOLOGY. PROCEEDINGS OF THE VIITH INTERNATIONAL AIRAPT CONFERENCE 318-20 1980
Part I 30 JULY - 3 AUG. 1979 LE CREUSOT, FRANCE
Publ: PERGAMON, OXFORD, ENG.
LXII + 590 pp. ISBN 08 024774 1
Treatment: NEW DEVELOPMENTS; PRACTICAL; EXPERIMENTAL
Doc. Type: CONF. PAP.
Lang.: ENG. (6 Refs)
A NOVEL EXPERIMENTAL METHOD TO DETERMINE LOCAL HYDROSTATIC STRESSES AND DISPLACEMENTS DURING THE COMPRESSION OF ALUMINIUM CYLINDERS IS REPORTED. RUBY PARTICLES ARE EMBEDDED IN THE SURFACE OF THE SPECIMEN AND SERVE AT THE SAME TIME AS POSITION MARKERS AND PRESSURE SENSORS. THIS SURFACE IS VISIBLE DURING DEFORMATION THROUGH PRESTRAINED SAPPHIRE ANVILS OF 25 MM IN DIAMETER. THE DISPLACEMENTS OF THE RUBIES AT SUBSEQUENT LOAD TEMPS CHARACTERIZE THE FRICTION BEHAVIOUR. TOGETHER WITH THE MEASURED STRESS-STRAIN CURVE THESE DISPLACEMENTS WERE USED AS INPUT DATA FOR A COMPUTER CALCULATION WITH THE FINITE ELEMENT METHOD. THE CALCULATED AND MEASURED STRESS DISTRIBUTIONS SHOW A FAIR CORRESPONDENCE.
Desc.: ALUMINIUM; COMPRESSIBILITY; HIGH-PRESSURE EFFECTS IN SOLIDS FRICTION; STRESS/STRAIN RELATIONS; PHYSICS COMPUTING; FINITE ELEMENT ANALYSIS
Ident.: FLOW PATTERNS; LARGE AXIAL COMPRESSION; LOCAL HYDROSTATIC STRESSES; POSITION MARKERS; PRESSURE SENSORS; PRESTRAINED SAPPHIRE ANVILS; FRICTION BEHAVIOUR; STRESS-STRAIN CURVE; COMPUTER CALCULATION; FINITE ELEMENT METHOD; STRESS DISTRIBUTIONS; AL CYLINDERS; RUBY PARTICLES
Class Codes: A6220F; A8140L; A6250; A8140P; A6220P

Y027013 122 
665025 A81028011, B81017365
THE PRESSURE CALIBRATION SYSTEM OF BNM
FIEFFE-PREVOST, P.
BUR. NAT. DE METROLOGIE, PARIS, FRANCE
VODAR, B.; MARTEAU, P. (Editors)
Sponsor: EUROPEAN PHYS. SOC.; ET AL.
HIGH PRESSURE SCIENCE AND TECHNOLOGY. PROCEEDINGS OF THE VIITH INTERNATIONAL AIRAPT CONFERENCE 223-5 1980
Part I 30 JULY - 3 AUG. 1979 LE CREUSOT, FRANCE
Publ: PERGAMON, OXFORD, ENG.
LXII + 590 pp. ISBN 0 08 024774 1
Treatment: GENERAL, REVIEW; PRACTICAL
Doc. Type: CONF. PAP.
Lang.: ENG. (2 Refs)
THE FIELD OF PRESSURE MEASUREMENT IS VERYPROAD. IT RANGES FROM THE ULTRAHIGH VACUUM (P=10/SUP -9/ PA) TO VERY HIGH PRESSURES (P>10/SUP 10/ PA). MOREOVER IT IS OFTEN NECESSARY TO CONSIDER THE MEASUREMENT OF THE PRESSURE IN DYNAMIC PHENOMENA. THEREFORE THE TRANSFER FUNCTION OF THE PRESSURE TRANSDUCER MUST BE KNOWN. THE AUTHORS REVIEW THE BNM CALIBRATION SYSTEM.
Desc.: PRESSURE MEASUREMENT; PRESSURE TRANSDUCERS; TRANSFER FUNCTIONS; CALIBRATION
Ident.: PRESSURE CALIBRATION SYSTEM; PRESSURE MEASUREMENT; DYNAMIC PHENOMENA; TRANSFER FUNCTION; "SSURE TRANSDUCER
Class Codes: A?735; A0730D; B7320V; B7230; B7130

Y027013 123 
658980 A81028008
GENERATOR OF TRIANGULAR PRESSURE PULSE UP TO 500 MPA
WISNIEWSKI, R.; ROSTOCKI, A.J.; BOCK, W.J.
INST. OF PHYS., WARSAW TECH. UNIV., WARSAW, POLAND
VODAR, B.; MAREAU, P. (Editors)
Sponsor: EUROPEAN PHYS. SOC.; ET AL.
HIGH PRESSURE SCIENCE AND TECHNOLOGY. PROCEEDINGS OF THE VIITH
{_INTERNATIONAL AIRAPT CONFERENCE 176-80 1980
Part I 30 JULY - 3 AUG. 1979 LE CREUSOT, FRANCE
Publ: PERGAMON, OXFORD, ENG.
LXII + 590 pp. ISBN 0 08 024774 1
Treatment: APPLIC; PRACTICAL
Doc. Type: CONF. PAP.
Lang.: ENG. (5 Refs)
THE GENERATOR OF TRIANGULAR PRESSURE PULSE DEVELOPED BY THE AUTHORS SUITABLE FOR TESTING OF ELECTRICAL HIGH SPEED PRESSURE TRANSDUCERS IS DESCRIBED. SOLE APPLICATIONS ARE ADDED.
Desc.: HIGH-PRESSURE TECHNIQUES; PRESSURE TRANSDUCERS; PULSE GENERATORS
Ident.: 500 MPA; ELECTRICAL HIGH SPEED PRESSURE TRANSDUCERS; APPLICATIONS; TRIANGULAR PRESSURE PULSE GENERATOR
Class Codes: A0735

Y027013 124 
655791 A81024629
METROLOGICAL PROVISIONS FOR HYDROPHYSICAL MEASUREMENTS (WIDEBAND HYDROPHONES)
BELASHCHENKO, G.I.; KABUROV, I.S.; MASLOV, V.K.; TROKHAN, A.M.
IZMER. TEKH. (USSR) 51-2 FEB. 1980 CODEN: IZTEAW
Trans in: MEAS. TECH. (USA) VOL.23, NO.2 166-8 FEB. 1980 CODEN: ?STCAL
Doc. Type: JRNL PAP.
Lang.: ENG. (11 Refs)
ONE OF THE PRESSING TASKS OF APPLIED HYDROACOUSTICS CONSISTS OF LOWERING THE DETECTION THRESHOLD IN MEASURING HYDROACOUSTICAL SIGNALS WITH NONDIRECTIONAL WIDEBAND HYDROPHONES. THE ANALYSIS CARRIED OUT HAS SHOWN THE ADVISABILITY OF USING THIN-WALLED CYLINDRICAL PIEZOELECTRIC ELEMENTS POLARIZED TANGENTIALLY FOR THE PURPOSE OF RAISING THE SYSTEM SENSITIVITY. AT THE SAME TIME MINIATURE LOW-NOISE PREAMPLIFIERS WITH FETS WERE PRODUCED AND STRUCTURALLY INCORPORATED IN TRANSDUCERS. IN DETERMINING THE TRANSDUCER SIZES A COMBINED APPROACH WAS DEVELOPED FOR MEETING THE VARIOUS REQUIREMENTS SPECIFIED OR THE HYDROPHONES (A WIDE FREQUENCY RANGE, MAXIMUM STABILITY WITH TIME, MINIMUM LEVEL OF EQUIVALENT NOISE PRESSURE, AND A MINIMAL VARIATION OF PARAMETERS WITH TEMPERATURE AND DEPTH). A THEORETICAL ANALYSIS OF THE DIRECTIONAL CHARACTERISTICS OF CYLINDRICAL TRANSDUCERS IN THE PLANE COINCIDING WITH THEIR AXIS SERVED TO SOLVE THE PROBLEM OF ELECTING AN OPTIMUM RATIO OF THE CYLINDER HEIGHT TO ITS DIAMETER FOR WHICH THE DIRECTIONAL NONUNIFORMITY IS MINIMAL. AS A RESULT OF THIS NOMOGRAMS WERE PLOTTED FOR FINDING THE REQUIRED ULTRASONIC-HYDROPHONE HEIGHT FOR A GIVEN DIAMETER AND DETERMINING THE UPPER FREQUENCY OF THE WORKING RANGE. A DETAILED EXAMINATION WAS CARRIED OUT WITH RESPECT TO THE SHAPE AND QUANTITY OF ELECTRODES INTENDED FOR TANGENTIAL POLARIZATION, THUS ENSURING MAXIMUM SENSITIVITY FOR A MINIMUM INTERNAL NOISE OF HYDROPHONES. EXTENSIVE INVESTIGATIONS WERE CARRIED OUT REGARDING THE CHARACTERISTIC OF COMPOUNDS USED FOR PROTECTING HYDROPHONES FROM THE EFFECT OF AMBIENT CORROSIVE MEDIA.
Desc.: HYDROPHONES; UNDERWATER SOUND; PIEZOELECTRIC TRANSDUCERS
Ident.: HYDROACOUSTICS; DETECTION THRESHOLD; EQUIVALENT NOISE PRESSURE; CYLINDER EIGHT; NOMOGRAMS; MINIMUM INTERNAL NOISE; LOW NOISE PREAMPLIFIERS; UNDERWATER SOUND; TANGENTIAL POLARISATION; NONDIRECTIONAL WIDEBAND HYDROPHONES; CYLINDRICAL PIEZOELECTRIC ELEMENTS
Class Codes: A4385; A4330; A4388

Y027013 125 
649838 A81021810, B81013287
A NEW MEMBRANE-TYPE PH SENSOR FOR USE IN HIGH TEMPERATURE-HIGH PRESSURE WATER
NIEDRACH, L.W.
RES. AND DEV. CENTER, GENERAL ELECTRIC CO., SCHENECTADY, NY, USA
J. ELECTROCHEM. SOC. (USA) VOL.127, NO.10 2122-30 OCT. 1980 CODEN: JESOAN
Treatment: NEW DEVELOPMENTS; PRACTICAL; EXPERIMENTAL
Doc. Type: JRNL PAP.
Lang.: ENG. (28 Refs)
THE NEW SENSOR PROVIDES FOR THE DIRECT MEASUREMENT OF THE PH OF GEOTHERMAL BRINES, WATER IN NUCLEAR REACTORS, AND OTHER HIGH TEMPERATURE SOLUTIONS. THE HEART OF THE UNIT IS AN OXYGEN ION CONDUCTING CERAMIC THAT SERVES AS THE MEMBRANE IN A STRUCTURE SOMEWHAT AKIN TO THAT OF THE CONVENTIONAL GLASS ELECTRODE. YTTRIA STABILIZED ZIRCONIAS WITH BOTH AQUEOUS INTERNAL JUNCTIONS AND DRY, METAL-METAL OXIDE INTERNAL JUNCTIONS WERE EMPLOYED. TEST UNITS WERE RUN CONTINUOUSLY WITHOUT FAILURE FOR PERIODS AS LONG AS 13 DAYS AT TEMPERATURES OF 285 DEGREESC AND AT PRESSURES OF 1200 PSI. UNDER THESE CONDITIONS THE RESPONSE OVER THE PH RANGE 3-8 (AT 285 DEGREES) WAS LINEAR WITH A SLOPE UP TO 97PERCENT OF THEORETICAL. THE MEMBRANE IS INSENSITIVE TO CHANGES IN THE REDOX ENVIRONMENT, AND EXERTS NO INFLUENCE ON THE ENVIRONMENT. ALTHOUGH PRIMARY EMPHASIS WAS PLACED ON HIGH TEMPERATURE PERFORMANCE, THE CERAMIC MEMBRANES WERE ALSO SHOWN TO FUNCTION AS PH SENSORS OVER THE TEMPERATURE RANGE FROM 25 DEGREES TO 285 DEGREESC.
Desc.: PH MEASUREMENT; MEMBRANES; CERAMICS; ZIRCOMIUM COMPOUNDS; YTTRIUM COMPOUNDS; HIGH-TEMPERATURE TECHNIQUES; HIGH-PRESSURE TECHNIQUES; ELECTRIC SENSING DEVICES 
Ident.: HIGH TEMPERATURE SOLUTIONS; OXYGEN ION CONDUCTING CERAMIC; REDOX ENVIRONMENT; MEMBRANE TYPE PH SENSOR; Y/SUB 2/O/SUB 3/ STABILISED MEMBRANE; HIGH PRESSURE; ZRO/SUB 2/-Y/SUB 2/O/SUB 3/
Class Codes: A8280; A073?; A0720K; A0670D; B7320T; B7230

Y027013 126 
649667 B81013077
AGE STABILITY OF A SEMICONDUCTOR STRESS TRANSDUCER
FANCIS, E.C.; THOMPSON, R.E.
UNITED TECHNOLOGIES CORP., SUNNYVALE, CA, USA
INSTRUMENTATION IN THE AEROSPACE INDUSTRY, VOL. 26. ADVANCES IN TEST MEASUREMENT, VOL.17. PROCEEDINGS OF THE 26TH INTERNATIONAL INSTRUMENTATION SYMPOSIUM 623-35 1980
Part II 5-8 MAY 1980 SEATTLE, WA, USA
Publ: ISA, RESEARCH TRIANGLE PARK, NC, US
390 pp.
Treatment: EXPERIMENTAL
Doc. Type: CONF. PAP.
Lang.: ENG. (7 Refs)
A MINIATURE PRESSURE TRANSDUCER WITH LOW DEFLECTION AND HIGH SPRING CONSTANT, HAS BEEN DEVELOPED FOR USE IN MEASURING STRESS IN SOLID GRAIN ROCKET MOTORS. THE REQUIREMENTS FOR SURVIVAL AND PERFORMANCE ARE SUCH THAT THE SENSOR HAS DIRECT USE AS A GENERAL PRESSURE TRANSDUCER ESPECIALLY WHERE SMALL SIZE AND HIGH RELIABILITY ARE A REQUIREMENT. THIS PAPER SUMMARIZES THE DESIGN WORK TO DATE AND PRESENTS SOME LONG TERM PERFORMANCE RESULTS AS WELL AS OTHER TEST DATA. EXPERIMENTAL WORK WHICH SHOULD LEAD TO FURTHER IMPROVEMENT IN PERFORMANCE DEFINITION IS CONTINUING.
Desc.: TRANSDUCERS; STRESS MEASUREMENT
Ident.: SEMICONDUCTOR STRESS TRANSDUCER; MINIATURE PRESSURE TRANSDUCER; SOLID GRAIN ROCKET MOTORS; SOLID PROPELLANT BOND STRESS
Class Codes: B7230; B7320G

Y027013 127 
639493 A81014131
LIGHT SCATTERING CELL FOR STUDYING CRYSTALS UNDER UNIAXIAL STRESS
COPIC, M.; ZGONIK, M.; LAVRENCIC, B.B.
DEPT. OF PHYS., K. KARDELJ UNIV., LJUBLJANA, YUGOSLAVIA
REV. SCI. INSTRUM. (USA) VOL.51, NO.10 1323-5 OCT 1980 CODEN: RSINAK
Treatment: EXPERIMENTAL
Doc. Type: JRNL PAP.
Lang.: ENG. (7 Refs)
THE AUTHORS DESCRIBE THE CONSTRUCTION OF AN OPTICAL SCATTERING CELL WHICH HAS BEEN USED FOR THE BRILLOUIN SPECTROSCOPY OF FERROELASTIC KH/SUB 3/ (SEO/SUB 3/)/SUB 2/. USING A PNEUMATIC TRANSDUCER, THE AUTHORS WERE ABLE TO OBTAIN UNIAXIAL STRESS UP TO 18 MPA IN A 4 MM CUBE SAMPLE. TEMPERATURES DOWN TO LIQUID N/SUB 2/ AND UP TO 60 DEGREESC ARE OBTAINABLE WITH THE STABILITY OF 2 MK. THE CELL IS CONSTRUCTED FOR 90 DEGREES SCATTERING GEOMETRY AND ALLOWS THE USE OF INDEX MATCHING LIQUID.
Desc.: HIGH-PRESSURE SOLID-STATE PHASE TRANSFORMATIONS; POTASSIUM COMPOUNDS; FERROELASTICITY; PIEZO-OPTICAL EFFECTS; BRILLOUIN SPECTRA
Ident.: OPTICAL SCATTERING CELL; BRILLOUIN SPECTROSCOPY; KH/SUB/ (SEO/SUB 3/)/SUB 2/; PNEUMATIC TRANSDUCER; UNIAXIAL STRESS; INDEX MATCHING LIQUID; FERROELASTIC TRANSITION; PIEZO OPTICAL EFFECTS
Class Codes: A0735; A0760; A6250; A6470K; A7835; A7820H

Y027013 128 
635498 A81013359, B81008628 
A STABLE HIGHLY SENSITIVE IMPLANTABLE PRESSURE TRANSDUCER FOR ARTIFICIAL HEART
SKALA, L.; GOLDOWSKY, M.
PHILIPS LABS., NORTH AMERICAN PHILIPS CORP., BRIARCLIFF MANOR, NY, USA
Sponsor: IEEE
EIGHTH ANNUAL NORTHEAST BIOENG.RING CONFERENCE 289-92 1980
27-28 MARCH 1980 CAMBRIDGE, MA, USA
Publ: IEEE, NEW YORK, USA
552 pp.
Treatment: PRACTICAL
Doc. Type: CONF. PAP.
Lang.: ENG. (1 Refs)
A MINIATURE PRESSURE TRANSDUCER FOR CONTROLLING A VANE PUMP TYPE ARTIFICIAL HEART WAS DEVELOPED BY PHILIPS LABORATORIES. THIS PRESSURE TRANSDUCER MEETS THE RIGID STANDARDS OF LONG LIFE, HIGH STABILITY, AND HIGH OVERPRESSURES DEMANDED BY ITS USE IN AN ARTIFICIAL HEART SYSTEM. THE PRESSURE TRANSDUCER IS SENSITIVE ENOUGH TO MEASURE BOTH POSITIVE AND NEGATIVE PRESSURES AS LOW AS 1 MM MERCURY, YET STRONG ENOUGH TO MEASURE AND WITHSTAND PRESSURES AS HIGH AS 500 MM MERCURY. A THIN CAPILLARY TUBE COUPLED TO THE INSIDE CHAMBER OF THE TRANSDUCER MAINTAINS ATMOSPHERIC PRESSURE BEHIND THE DIAPHRAGM. THE OUTPUT OF THE EDDY-CURRENT SENSOR IS COUPLED TO A MICROPROCESSOR WHICH, IN TURN, CONTROLS THE MOTOR SPEED AND FILLING PRESSURE OF THE VANE PUMP.
Desc.: CARDIOLOGY; ARTIFICIAL ORGANS; PRESSURE TRANSDUCERS
Ident.: IMPLANTABLE PRESSURE TRANSDUCER; VANE PUMP TYPE ARTIFICIAL HEART; CAPILLARY TUBE; MICROPROCESSOR; EDDY CURRENT SENSOR
Class Codes: A8770J; B7520E; B7230

Y027013 129 
635224 A81005371, B8100829, C81001021
INTERFEROMETRIC MEASUREMENT OF THE BENDING BEHAVIOR OF SILICON PRESSURE-MEASURING DIAPHRAGMS
KRAUSE, R.
SIEMENS AG, SYSTEMTECHNISCHE ENTWICKLUNG KARLSRUHE, GERMANY
SIEMENS FORSCH.- AND ENTWICKLUNGSBER. (GERMANY) VOL.9, NO.5 253-6 1980 CODEN: SFEBBL
Treatment: EXPERIMENTAL
Doc. Type: JRNL PAP.
Lang.: GERMAN (3 Refs)
THE BENDING BEHAVIOR OF SMALL SILICON PRESSURE DIAPHRAGMS, WHICH CANNOT BE DESCRIBED BY THEORY, WAS INVESTIGATED EXPERIMENTALLY BY MEANS OF LASER INTERFERENCE. THE VALIDITY LIMIT OF KIRCSHOFF'S SIMPLIFYING THEORY OF PLATES CAN EASILY BE DETERMINED WITH THE AID OF A SMALL NUMBER OF MEASUREMENTS. OUTSIDE THIS LIMIT, THE ACTUAL DEFLECTION IS LESS THAN THE COMPUTABLE DEFLECTION, AND THERE IS ALSO A DEFORMATION OF THE BENDING LINE. NO DRIFT OF THE DIAPHRAGM RADIUS AT HIGH PRESSURE WAS OBSERVED. GUIDANCE IS GIVEN ON THE USE OF THE PROCESS WITH ANY DESIRED DIAPHRAGM SHAPE.
Desc.: DIAPHRAGMS; PRESSURE MEASUREMENT; PRESSURE TRANSDUCERS; LIGHT INTERFEROMETRY
Ident.: BENDING BEHAVIOR; LASER INTERFERENCE; VALIDITY LIMIT; SI PRESSURE MEASURING DIAPHRAGMS; PRESSURE TRANSDUCERS; INTERFEROMETRIC MEASUREMENT
Class Codes: A0760L; B7230; B7320V; C3240F

Y027013 130 
630431 A81011279
THE AIR GUN IMPULSIVE UNDERWATER TRANSDUCER
BARGER, J.E.; HAMBLEN, W.R.
BOLT BRANEK AND NEWMAN INC., CAMBRIDGE, MA, USA
J. ACOUST. SOC. AM. (USA) VOL.68, NO.4 1038-45 OCT. 1980 CODEN: JASMAN
Treatment: EXPERIMENTAL
Doc. Type: JRNL PAP.
Lang.: ENG. (7 Refs)
THE AUTHOR REPORTS THEIR EXPERIENCE WITH THE USE OF HIGH-PRESSURE GUNS AT MANY DEPTHS TO GENERATE IMPULSIVE UNDERWATER SOUND IN THE FUNDAMENTAL FREQUENCY RANGE FROM 10 TO 200 HZ. AIR GUNS ARE NOT OFTEN USED OUTSIDE OF SEISMIC EXPLORATION, BUT THEY HAVE POTENTIAL AS CHEAP, ENERGETIC, IMPULSIVE SOURCES OF LOW-FREQUENCY SOUND. A SIMPLE ANALYSIS SHOWS THAT THE FUNDAMENTAL FREQUENCY OF WAVEFORMS INCREASES FASTER WITH INCREASING DEPTH THAN PREDICTED BY THE RAYLEIGH-WILLIS EQUATION. IN ADDITION, THE ACOUSTICAL EFFICIENCY OF AIR GUN SOURCES IS FOUND TO DECREASE WITH INCREASING DEPTH, FALLING SHARPLY AS THE AMBIENT PRESSURE BECOMES A SIGNIFICANT FRACTION OF THE INITIAL GUN PRESSURE. EXPERIMENTAL WAVEFORM AND ENERGY SOURCE LEVEL DATA VERIFY THESE ANALYTICAL RESULTS. FINALLY, DATA OBTAINED FROM ARRAYS OF AIR GUNS ARE PRESENTED. THESE DATA DEMONSTRATE THAT AIR GUNS MAY BE SUCCESSFULLY ARRAYED AND THAT THE INTERNAL IMPEDANCE OF THE AIR GUN SOURCE IS HIGH ENOUGH THAT EACH AIR GUN RESEMBLES A CONSTANT SOURCE STRENG.VOLUME VELOCITY) SOURCE, RESULTING IN MORE RADIATED ENERGY THAN EXPECTED FROM CONSTANT ENERGY SOURCES FROM SOME SPACINGS.
Desc.: ACOUSTIC TRANSDUCERS; UNDERWATER SOUND
Ident.: AIR GUN; IMPULSIVE UNDERWATER TRANSDUCER; IMPULSIVE UNDERWATER SOUND; UNDERWATER SOUND SOURCE
Class Codes: A4388; A4330

Y027013 131 
616010 A81002614
PHASE RELATIONS OF ICE UNDER PRESSURE
MISHIMA, O.; ENDO, S.
HIGH PRESSURE RES. LAB., OSAKA UNIV., TOYONAKA, JAPAN
J. CHEM. PHYS. (USA) VOL.73, NO.5 2454-6 1 SEPT. 1980 CODEN: JCPSA6
Treatment: EXPERIMENTAL
Doc. Type: JRNL PAP.
Lang.: ENG. (13 Refs)
IN ORDER TO CLARIFY THE PHASE RELATIONS OF ICE AT LOW TEMPERATURES, THE TRANSITIONS BETWEEN VARIOUS ICE POLYMORPHS WERE OBSERVED WITH A MANGANIN SENSOR UNDER PRESSURE. THE STABLE REGION OF ICE V DISAPPEARED AT LOW TEMPERATURE AND THE DIRECT TRANSITION FROM ICE II TO ICE VI WAS OBSERVED. THE TRIPLE POINT OF ICE II, V, AND VI EXISTS IN THE NEIGHBORHOOD OF -60 DEGREESC AND 6 KBAR. THE P-T PHASE DIAGRAM OF H/SUB 2/O WAS COMPILED FROM THE PRESENT DATA TOGETHER WITH THE LITERATURE DATA.
Desc.: ICE; PHASE DIAGRAMS; HIGH-PRESSURE SOLID-STATE PHASE TRANSFORMATIONS; CRITICAL POINTS; POLYMORPHIC TRANSFORMATIONS
Ident.: ICE; PRESSURE; PHASE RELATIONS; POLYMORPHS; MANGANIN SENSOR ICE V; ICE II; ICE VI; TRIPLE POINT; P-T PHASE DIAGRAM; H/SUB 2/O 
Class Codes: A6470K; A6460K; A6250

Y027013 132 
614534 A81000736
BEHAVIOR OF DRAG DISC TURBINE TRANSDUCERS IN STEADY-STATE TWO-PHASE FLOW
SOLBRIG, C.W.; REIMANN, J.
COMMONWEALTH EDISON CO., CHICAGO, IL, USA
IEEE TRANS. NUCL. SCI. (USA) VOL.NS-27, NO.4 1321-8 AUG. 1980 CODEN: IETNAE
Treatment: EXPERIMENTAL
Doc. Type: JRNL PAP.
Lang.: ENG. (5 Refs)
MANY EXPERIMENTS BEING CONDUCTED TO INVESTIGATE THE HYPOTHESIZED LOSS-OF-COOLANT ACCIDENT (LOCA) IN NUCLEAR POWER PLANTS INVOLVE THE MEASUREMENT OF TWO-PHASE FLOW. DESCRIBES AN EXPERIMENT CONDUCTED TO DETERMINE THE BEHAVIOR OF A DRAG-DISC TURBINE TRANSDUCER (DTT) IN A HIGH PRESSURE, HIGH TEMPERATURE, STEAM-WATER STEADY STATE ENVIRONMENT. DTTS HAVE BEEN USED EXTENSIVELY TO MEASURE MASS FLOW RATES IN THE LOSS-OF-FLUID-TEST (LOFT) EXPERIMENTS.
Desc.: FISSION REACTOR SAFETY; FISSION REACTOR COOLING AND HEAT RECOVERY; TWO-PHASE FLOW
Ident.: DRAG DISC TURBINE TRANSDUCERS; LOCA; STEADY STATE TWO PHASE FLOW; LOSS OF COOLANT ACCIDENT
Class Codes: A2840K; A2845E; A4755K

Y027013 133 
590646 A80096641
PHASE TRANSITIONS IN BARIUM AND BISMUTH UNDER HIGH PRESSURE
YONEDA, A.; ENDO, S.
FACULTY OF ENG.SCI., OSAKA UNIV., TOYONAKA, JAPAN
J. APPL. PHYS. (USA) VOL.51, NO.6 3216-21 JUNE 1980 CODEN: JAPIAU
Treatment: EXPERIMENTAL
Doc. Type: JRNL PAP.
Lang.: ENG. (30 Refs)
THE CONTROVERSIAL PHASE TRANSITIONS IN BARIUM AND BISMUTH WERE STUDIED WITH MANGANIN COIL SENSOR. THE TRANSITION IN BARIUM PROPOSED AT 80 KBARS BY BASTIDE ET AL. WAS CONFIRMED AT 95 KBARS. FOR BISMUTH, THE TRANSITION REPORTED FIRST BY BRIDGMAN AROUND 45 KBARS WAS CONFIRMED AT 40 KBARS, BUT THAT AROUND 65 KBARS COULD NOT BE DETECTED. TO MAKE UP THE P-T DIAGRAM OF BARIUM, THE CONFIRMED TRANSITION AND THE SO-CALLED HIGH-BA TRANSITION WERE TRACED AT ELEVATED TEMPERATURES BY THE RESISTANCE ANOMALY OF BARIUM, AND THE MELTING POINTS ABOVE 90 KBARS WERE DETERMINED WITH A MANGANIN RIBBON SENSOR. THE MECHANISM OF THE MANGANIN SENSOR IS DISCUSSED WITH REGARD TO THE VOLUME CHANGE ASSOCIATED WITH A TRANSITION.
Desc.: BARIUM; HIGH-PRESSURE SOLID-STATE PHASE TRANSFORMATIONS; MELTING POINT; PHASE DIAGRAMS; BISMUTH; HIGH-PRESSURE SOLID-STATE PHASE TRANSFORMATIONS
Ident.: HIGH PRESSURE; PHASE TRANSITIONS; P-T DIAGRAM; RESISTANCE ANOMALY; MELTING POINTS ABOVE 90 KBARS; BA; BI
Class Codes: A6470K; A6470D; A8130B; A6250

Y027013 134 
581517 B80045768
MINIATURE MICROPHONE USING AN INTEGRATED PIEZORESISTIVE PRESSURE TRANSDUCER
SANK, J.R.
CROSS COUNTRY CONSULTANTS, HADDONFIELD, NJ, USA
J. AUDIO ENG.C. (USA) VOL.28, NO.6 433-6 JUNE 1980 CODEN: ADIOA3
Treatment: PRACTICAL
Doc. Type: JRNL PAP.
Lang.: ENG. (5 Refs)
AN EXPERIMENTAL PRESSURE MICROPHONE HAS BEEN CONSTRUCTED UTILIZING A CHIP FROM AN INTEGRATED-CIRCUIT PRESSURE TRANSDUCER. THE FREQUENCY RESPONSE IS UNIFORM FROM 20 TO 20000 HZ. THE MICROPHONE HAS BEEN SUCCESSFULLY USED FOR REAL-EAR TESTING OF STEREOPHONES, WHERE IT IS PLACED UNDER THE EAR CAP. THE BALANCED LOW-IMPEDANCE OUTPUT OF THE TRANSDUCER POTENTIALLY AFFORDS GOOD ELECTROMAGNETIC-INTERFERENCE (EMI) REJECTION. PRESSURE GRADIENT CONFIGURATIONS ARE REALIZABLE. AT PRESENT LOW ELECTROACOUSTIC SENSITIVITY LIMITS POTENTIAL AUDIO APPLICATIONS OF THE TRANSDUCER TO HIGH-LEVEL SOUND PICKUP, INCLUDING CLOSE-TALKING MICROPHONE OR MUSICAL INSTRUMENT SOUND PICKUPS.
Desc.: PIEZOELECTRIC TRANSDUCERS; MICROPHONES; PRESSURE TRANSDUCERS
Ident.: INTEGRATED PIEZORESISTIVE PRESSURE TRANSDUCER; MINIATURE PRESSURE MICROPHONE; HIGH LEVEL SOUND PICKUP EMI REJECTION
Class Codes: B6450; B7230; B2860

Y027013 135 
573856 B80041480, C80026024
PRESSURE MEASUREMENT
LANCASTER, R.T.
BELL AND HOWELL LTD., WEMBLEY, ENG.
AUTOMATION (GB) VOL.15, NO.2 17, 19, 21, 23 MARCH 1980 CODEN: ATMNBV
Treatment: GENERAL, REVIEW; PRACTICAL
Doc. Type: JRNL PAP.
Lang.: ENG.
THE MEASUREMENT OF PRESSURE, AT FIRST SIGHT, SEEMS A STRAIGHTFORWARD SIMPLE TASK, BUT AS WITH MOST INDUSTRIAL APPLICATIONS IT IS THE PHYSICAL CONSTRAINTS OF THE OPERATING ENVIRONMENT THAT CAN POSE THE BIGGEST PROBLEMS. HOWEVER, WHEN PROPERLY DEFINED, THE TRANSDUCER MANUFACTURER IS ABLE TO PROVIDE THE MOST COST-EFFECTIVE SOLUTION TO GIVE THE REQUIRED PERFORMANCE AT MINIMUM PRICE. THE PURPOSE OF THIS ARTICLE IS TO OUTLINE THE BASIC PRINCIPLES AND PROBLEMS OF RELIABLE PRESSURE MEASUREMENT USING TRANSDUCERS.
Desc.: PRESSURE MEASUREMENT; PRESSURE TRANSDUCERS
Ident.: TRANSDUCER; PRESSURE MEASUREMENT; PRESSURE TRANSDUCERS
Class Codes: B7230; B7320V; C3240

Y027013 136 
567891 B80040576
UHF SIGNAL TRANSMISSION ANALYSER
STOLZENBERG, P.
FUNKSCHAU (GERMANY) VOL 52, NO.10 75-7 9 MAY 1980 CODEN: FUSHA2
Treatment: APPLIC; PRACTICAL
Doc. Type: JRNL PAP.
Lang.: GERMAN (3 Refs)
RESEARCH TO RELATE UHF TRANSMISSION RANGES TO THE STANDARD WEATHER FORECASTS BY AIRPORT AUTHORITIES IS DESCRIBED, WITH SPECIAL REFERENCE TO THE CORRELATION OF RANGE WITH HIGH PRESSURE REGIONS. A CIRCUIT IS DESCRIBED WHICH OPERATES A RELAY WHEN THE ATMOSPHERIC PRESSURE RISES ABOVE A PRESET LEVEL, TO INDICATE THAT TRANSMISSION CONDITIONS ARE FAVOURABLE. THE TRANSDUCER IS A BAROMETER CAPSULE WHICH DRIVES A VARIABLE INDUCTANCE ELEMENT.
Desc.: RADIOWAVE PROPAGATION; METEOROLOGICAL INSTRUMENTS; PRESSURE TRANSDUCERS
Ident.: UHF SIGNAL TRANSMISSION ANALYSER; RELAY; ATMOSPHERIC PRESSURE; VARIABLE INDUCTANCE ELEMENT; WEATHER FORECASTS; HIGH PRESSURE/RANGE CORRELATION; BAROMETRIC PRESSURE TRANSDUCER
Class Codes: B5210C; B7710B; B7230

Y027013 137 
555300 A8003378
SENSING ELEMENT FOR NORMAL STRESSES IN A SOLID MEDIUM AT HIGH PRESSURES
SHUL'PYAKOV, YU.F.; KOLOMIITSEV, A.I.; SOLOV'EVA, T.N.; OLYUNINA, T.V.
ALL-UNION SCI.-RES. AND STRUCTURAL TECHNOL. INST. FOR NATURAL DIAMONDS AND INSTRUMENTS, MOSCOW, USSR
PRIB. TEKH. EKSP. (USSR) VOL.22, NO.3 194-5 MAY-JUNE 1979 CODEN: PRTEAJ
Trans in: INSTRUM. AND EXP. TECH. (USA) VOL.22, NO.3, PT.2 822-4 MAY-JUNE 1979 CODEN: INETAK
Treatment: NEW DEVELOPMENTS
Doc. Type: JRNL PAP.
Lang.: ENG. (3 Refs)
A SENSING ELEMENT OF BISMUTH FOIL FOR DETERMINING THE NORMAL STRESS COMPONENTS IN A SOLID-STATE VERY-HIGH-PRESSURE TEST CELL IS DESCRIBED. THE NORMAL STRESS COMPONENTS ARE MEASURED IN THE DIRECTIONS ALONG AND PERPENDICULAR TO THE COMPRESSION AXES IN MEDIA WITH DIFFERENT STABILITIES AGAINST SHEAR.
Desc.: PRESSURE TRANSDUCERS; BISMUTH; HIGH-PRESSURE TECHNIQUES
Ident.: SOLID MEDIUM; HIGH PRESSURES; SENSING ELEMENT; FOIL; NORMAL STRESS; TEST CELL; COMPRESSION; SHEAR; BI
Class Codes: A0735; A0670D

Y027013 138 
554060 B80037302
PRESSURE MEASUREMENTS ON A SPINNING WIND-TUNNEL MODEL BY MEANS OF TELEMETRY
MARK, A.
US ARMY BALLISTIC RES. LAB., ABERDEEN, MD, USA
ISA TRANS. (USA) VOL.8, NO.3 3-11 1979 CODEN: ISATAZ
Treatment: PRACTICAL; EXPERIMENTAL
Doc. Type: JRNL PAP.
Lang.: ENG.
THE MAGNUS FORCE IS A SIDE FORCE WHICH EXISTS ON SPIN STABILIZED PROJECTILES AT ANGLE OF ATTACK. A LARGE PART OF THE MAGNUS FORCE ARISES FROM AN ASYMMETRIC PRESSURE DISTRIBUTION CAUSED BY THE DISTORTED BOUNDARY LAYER. A POSSIBLE TECHNIQUE FOR MEASURING THE PRESSURE DISTRIBUTION ABOUT A SPINNING BODY AND OBTAINING THE FORCE BY INTEGRATION IS DISCUSSED. IT ALSO WOULD SERVE AS A CHECK FOR THREE DIMENSIONAL BOUNDARY LAYER CALCULATIONS. THE TECHNIQUE INVOLVES IMBEDDING PRESSURE TRANSDUCERS INTO THE MODEL SURFACE AND THE USE OF A MINIATURE, SELF-CONTAINED TELEMETRY SYSTEM TO TRANSMIT THE PRESSURE DATA OUT OF THE TUNNEL. DATA WITH SPIN AND WITHOUT SPIN HAVE BEEN OBTAINED AT A SINGLE AXIAL LOCATION ON A TANGENT-OGIVE-CYLINDER. THE DATA WITHOUT SPIN COMPARED FAVORABLY WITH THEORETICAL CALCULATION. DATA WITH SPIN INDICATED AN ANOMALY IN THE PRESSURE DISTRIBUTION.
Desc.: PRESSURE MEASUREMENT; TELEMETERING SYSTEMS; WIND TUNNELS; PROJECTILES
Ident.: MAGNUS FORCE; ASYMMETRIC PRESSURE DISTRIBUTION; SPIN STABILISED PROJECTILES; WIND TUNNEL MODEL; THREE DIMENSIONAL BOUNDARY LAYER
Class Codes: B7620; B6210J; B7320V; B7210F

Y027013 139 
553747 A80068205, B80036848
THE MEASUREMENT OF PRESSURE WITH AN ELASTOMAGNETIC PRESSDUCTOR
MOJZIS, M.
KATEDRA TEORETICKEJ A EXPERIMENTALNEJ ELEKTROTECH., ELECTROTECH. FAKULTA VST, KOSICE, CZECHOSLOVAKIA
ELEKTROTECH. CAS. (CZECHOSLOVAKIA) VOL.31, NO.3 224-33 1980 CODEN: ELKCA9
Treatment: APPLIC; PRACTICAL; EXPERIMENTAL
Doc. Type: JRNL PAP.
Lang.: CZECH (6 Refs)
DESCRIBES THE DESIGN OF A PRESSDUCTOR, WHICH OPERATES ON THE PRINCIPLE OF THE VILLARY PHENOMENA. IN THE THEORETICAL PART, THE TERM FOR THE OUTPUT CHARACTERISTIC OF THE PRESSDUCTOR IS DERIVED. SOME CHARACTERISTICS OF PRESSDUCTORS MADE OF CZECHOSLOVAK FERROMAGNETIC MATERIALS ARE SHOWN IN THE DIAGRAM. THE OBTAINED RESULTS ARE AS FOLLOWS: MEASUREMENT RANGE 20-120 MPA, TOLERATED ERROR 1.5PERCENT, WORKING TEMPERATURE 293-333K.
Desc.: PRESSURE MEASUREMENT; PRESSURE TRANSDUCERS
Ident.: ELASTOMAGNETIC PRESSDUCTOR; VILLARY PHENOMENA; OUTPUT CHARACTERISTIC; CHARACTERISTICS; CZECHOSLOVAK FERROMAGNETIC MATERIALS; MEASUREMENT RANGE; TOLERATED ERROR; WORKING TEMPERATURE; PRESSURE MEASUREMENT; PRESSURE TRANSDUCERS
Class Codes: A0730K; B7230; B7320V

Y027013 140 
523362 A80052246
METHOD OR THE DETERMINATION OF THE SPECIFIC HEAT OF METALS AT LOW TEMPERATURES UNDER HIGH PRESSURES
EICHLER, A.; GEY, W.
INST. FUR TECH. PHYS., TECH. UNIV., BRAUNSCHWEIG, GERMANY
REV. SCI. INSTRUM. (USA) VOL.50, NO.11 1445-52 NOV. 1979 CODEN: RSINAK
Treatment: PRACTICAL
Doc. Type: JRNL PAP.
Lang.: ENG. (33 Refs)
EFFORTS ARE MADE TO DETERMINE THE ABSOLUTE SPECIFIC HEAT OF METALS AS A FUNCTION OF PRESSURE WITH AN ACCURACY, WHICH, FOR THE FIRST TIME, WILL PERMIT A DIRECT EVALUATION OF THE PRESSURE VARIATION OF THE ELECTRONIC AND PHONON PARAMETERS GAMMA AND THETA/SUB D/, RESPECTIVELY. THIS IS ACHIEVED BY EMPLOYING THE AC METHOD OF SULLIVAN AND SEIDEL (1968), AND CHOOSING A SUITABLE SAMPLE CONFIGURATION WITHIN A PISTON-CYLINDER PRESSURE CELL. ESSENTIAL IS THE USE OF DIAMOND POWDER AS A PRESSURE TRANSMITTING MEDIUM, WHICH BECAUSE OF ITS LOW HEAT CAPACITY AND HIGH THERMAL RESISTANCE, COUPLES THE SAMPLE LOOSELY TO THE TEMPERATURE BATH, REPRESENTED BY THE PRESSURE CYLINDER. THUS, THE THERMAL REQUIREMENTS OF THE AC METHOD ARE MET, AND CORRECTIONS-IF NECESSARY-ARE FULLY TRACTABLE. HIGH SENSITIVITY EVEN AT THE LOWEST TEMPERATURES IS OBTAINED BY THE USE OF THIN SLICES, PREPARED FROM STANDARD CARBON RESISTORS, FOR THERMOMETERS. ALTHOUGH DELICATE, THESE SENSORS WITHSTAND PRESSURES OF MORE THAN 20 KBARS AND REMAIN SENSITIVE. A THOROUGH COMPARISON OF RESULTS ON INDIUM WITH THE LITERATURE DATA AT ZERO PRESSURE IS UNDERTAKEN. IT SHOWS THAT THE ACCURACY OF THE PRESENT RESULTS IS COMPARABLE WITH THAT FROM LITERATURE DATA. PRELIMINARY RESULTS AT PRESSURES UP TO 8 KBAR ARE SHOWN; THEY WILL BE DISCUSSED IN A SEPARATE PAPER.
Desc.: SPECIFIC HEAT OF SOLIDS; HIGH-PRESSURE EFFECTS IN SOLIDS; METALS; LOW-TEMPERATURE TECHNIQUES; HIGH-PRESSURE TECHNIQUES; THERMAL VARIABLES MEASUREMENT
Ident.: LOW TEMPERATURES; HIGH PRESSURES; METALS; PRESSURE VARIATION ; PHONON PARAMETERS; SPECIFIC HEAT DETERMINATION; ELECTRONIC PARAMETERS; AC METHOD; PISTON CYLINDER PRESSURE CELL
Class Codes: A0720M; A?250; A6540; A0735

Y027013 141 
521949 A80050915, B80026001
THE USE OF SILICON MICROELECTRONIC GAS-SENSITIVE ELEMENTS UNDER PULSED ADSORPTION CONDITIONS
TYAGAI, V.A.; SHIRSHOV, YU.M.; OMEL'CHUK, V.V.
ACAD. OF SCI., UKRANIAN SSR
POLUPROVODN. TEKH. AND MIKROELEKTRON. (USSR) NO.30 90-6 1979 CODEN: PTMUAC
Treatment: EXPERIMENTAL
Doc. Type: JRNL PAP.
Lang.: RUSSIAN (11 Refs)
REPORTS THE RESULTS OF AN EXPERIMENT ON TRANSDUCER IN CONNECTION WITH THE DEVELOPMENT OF MINIATURE GAS ANALYSERS FOR USE IN GAS CHROMATOGRAPHY. THE AUTHORS ANALYSE THE VARIATION IN THE CONDUCTIVITY OF P AND N TYPE SILICON MICROTRANSDUCERS WHOSE SURFACES HAVE BEEN TREATED WITH HYDROFLUORIC ACID VAPOUR, WHEN SUBJECTED TO PULSED ADSORPTION OF MOLECULES OF ETHANOL. TYPICAL WAVEFORMS OF THE RESPONSE DURING INTERACTION WITH DELTA PULSES OF ALCOHOL VAPOUR PRESSURE ARE SHOWN. A MODEL IS PROPOSED THAT TAKES ACCOUNT OF THE TUNNELING INTERACTION OF THE ADSORPTION LEVELS WITH LONG TERM PROCESSES AT THE SURFACE OF THE SILICON.
Desc.: SILICON; CHROMATOGRAPHY; ELECTRICAL CONDUCTIVITY OF CRYSTALLINE SEMICONDUCTORS AND INSULATORS; ADSORPTION; TUNNELLING
Ident.: MINIATURE GAS ANALYSERS; GAS CHROMATOGRAPHY; PULSED ADSORPTION OF MOLECULES OF ETHANOL; ADSORPTION LEVELS; LONG TERM PROCESSES TUNNELLING INTERACTION; HF ACID VAPOUR; SI MICROTRANSDUCER
Class Codes: A8280B; A7220F; A6845D; B7230; B7320T

Y027013 142 
516763 A80048751
REFLECTION OF WEAK SHOCK WAVES IN AIR FROM PLANE OBSTACLES MADE OF VARIOUS MATERIALS
ANIK'EV, I.I.
INST. OF MECH., ACAD. OF SCI., KIEV, UKRAINIAN SSR
PRIKL. MEKH. (USSR) VOL.15, NO.6 128-31 JUNE 1979 CODEN: PKMKAL
Trans in: SOV. APPL. MECH. (USA) VOL.15, NO.6 552-4 JUNE 1979 CODEN: SOAMBT
Treatment: EXPERIMENTAL
Doc. Type: JRNL PAP.
Lang.: ENG. (2 Refs)
THE AUTHORS PRESENT RESULTS OF AN INVESTIGATION OF THE NORMAL REFLECTION OF WEAK SHOCK WAVES FROM PLANE PANELS MADE OF VARIOUS MATERIALS WITH THE HELP OF A PIEZOELECTRIC VELOCITY SENSOR, MAKING IT POSSIBLE TO EXPERIMENTALLY DETERMINE THE VELOCITY OF THE WAVE FRONT WITH AN ERROR OF 2PERCENT . EXPERIMENTS WERE CARRIED OUT IN A SHOCK TUBE OF RECTANGULAR CROSS SECTION 140*205 MM, CONSISTING OF A HIGH PRESSURE SECTION (LENG..? M) AND A LOW-PRESSURE SECTION (LENG. M), SEPARATED BY A THIN MEMBRANE OF xDTHICKNESS 0.2 MM THE INVESTIGATIONS SHOW THAT PLANE PANELS WITH DIFFERENT PHYSICAL AND GEOMETRICAL PARAMETERS AT THE INITIAL MOMENT OF INTERACTION WITH WEAK SHOCK WAVE FOR NORMAL INCIDENCE BEHAVE LIKE ABSOLUTELY RIGID OBSTACLES.
Desc.: SHOCK WAVES; REFLECTION
Ident.: PLANE OBSTACLES; REFLECTION; WEAK SHOCK WAVES; PLANE PANELS PIEZOELECTRIC VELOCITY SENSOR; VELOCITY; WAVE; SHOCK TUBE; HIGH PRESSURE SECTION; ABSOLUTELY RIGID OBSTACLES; LOW PRESSURE SECTION
Class Codes: A4740?; A4630M

Y027013 143 
506554 A80037047, B80021079
HIGH PRESSURE CLAMP FOR ELECTRICAL MEASUREMENTS UP TO GPA AND TEMPERATURE DOWN TO 77K
BANDYOPAHHYAY, A.K.; NALINI, A.V.; GOPAL, E.S.R.; SUBRAMANYAM, S.V.
DEPT. OF PHYS., INDIAN INST. OF SCI., BANGALORE, INDIA
REV. SCI. INSTRUM. (USA) VOL.51, NO.1 136-9 JAN. 1980 CODEN: RSINAK
Treatment: PRACTICAL
Doc. Type: JRNL PAP.
Lang.: ENG. (14 Refs)
A COMPACT LAMP-TYPE HIGH PRESSURE CELL FOR CARRYING OUT ELECTRICAL CONDUCTIVITY MEASUREMENTS ON SMALL SOLID SAMPLES OF SIZE 1 MM OR LESS AT PRESSURES UP TO 8 GPA (I.E. 80 KBAR) AND FOR USE DOWN TO 77K HAS BEEN DESIGNED AND FABRICATED. THE PRESSURE GENERATED IN THE SAMPLE REGION HAS BEEN CALIBRATED AT ROOM TEMPERATURE AGAINST THE POLYMORPHIC PHASE TRANSITIONS OF BISMUTH AND YTTERBIUM. THE PRESSURE RELAXATION OF THE CLAMP AT LOW TEMPERATURES HAS BEEN ESTIMATED BY MONITORING THE ELECTRICAL CONDUCTIVITY BEHAVIOR OF LEAD.
Desc.: ELECTRICAL CONDUCTIVITY MEASUREMENT; HIGH-PRESSURE TECHNIQUES; LOW-TEMPERATURE TECHNIQUES; PRESSURE TRANSDUCERS
Ident.: HIGH PRESSURE CELL; ELECTRICAL CONDUCTIVITY; POLYMORPHIC PHASE TRANSITIONS; HIGH PRESSURE CLAMP; BI; Y; PB
Class Codes: A0735; A0750; A0670M; B7230; B7310Z

Y027013 144 
500466 A80037552
CALIBRATION OF A DRAG DISC TURBINE TRANSDUCER AND A GAMMA BEAM DENSITOMETER TO MEASURE THE MASS FLOW RATE IN SEPARATED HORIZONTAL TWO-PHASE FLOW
REIMANN, J.; SOLBRIG, C.W.
INST. FUR REAKTORBAUELEMENTE, KERNFORSCHUNGSZENTRUM KARLSRUHE, KARLSRUHE, GERMANY
Sponsor: AMERICAN CHEM. SOC.; IEEE.; AMERICAN NUCLEAR SOC.; ET AL
PROCEEDINGS OF THE 14TH INTERSOCIETY ENERGY CONVERSION ENG.RING CONFERENCE 1538-43 1979
Part II 5-10 AUG. 1979 BOSTON, MA, USA
Publ: IEEE, NEW YORK, USA
IX + 1170 pp.
Treatment: PRACTICAL; EXPERIMENTAL
Doc. Type: CONF. PAP.
Lang.: ENG. (9 Refs)
THE ACCURATE MEASUREMENT OF TWO-PHASE MASS FLOW RATE IS VERY IMPORTANT IN EXPERIMENTS, SUCH AS THE LOFT EXPERIMENT, WHICH INVESTIGATE THE HYPOTHETICAL LOSS-OF-COOLANT ACCIDENT (LOCAL). THE AUTHORS ANALYSE EXPERIMENTS DESIGNED TO DETERMINE THE BEHAVIOR OF A LOFT FREE FIELD DRAG DISC TURBINE TRANSDUCER (DTT) AND A LOFT-TYPE THREE-BEAM GAMMA DENSITOMETER IN A STEADY STATE, HORIZONTAL HIGH PRESSURE STEAM-WATER FLOW. THE EXPERIMENTS WERE CONDUCTED IN A MASS FLOW AND VOID FRACTION RANGE WHERE A VARIETY OF SEPARATED FLOW REGIMES EXISTED WHICH STRONGLY INFLUENCED THE PERFORMANCE OF THE DTT. IT IS SHOWN THAT THE ACCURACY OF THE INSTRUMENTS IS MAINLY A FUNCTION OF THE VOID FRACTION.
Desc.: FISSION REACTOR SAFETY; FISSION REACTOR COOLING AND HEAT RECOVERY; NUCLEAR REACTOR INSTRUMENTATION; FLOW MEASUREMENT; TWO-PHASE FLOW ; TRANSDUCERS; CALIBRATION; FISSION RESEARCH REACTORS; CALIBRATION; DENSITOMETRY
Ident.: DRAG DISC TURBINE TRANSDUCER; GAMMA BEAM DENSITOMETER; MASS FLOW RATE; LOCA STEAM WATER FLOW; SEPARATED HORIZONTAL TWO PHASE FLOW; REACTOR SAFETY; REACTOR COOLING; FLOW MEASUREMENT
Class Codes: A2845E; A4780; A4755K; A0670M; A2840K; A2850D; A2840N; A0620H

Y027013 145 
491472 A80031785, B8001592
PIEZOELECTRIC CONVERTER FOR THE MEASUREMENT OF LARGE VARIABLE PRESSURES
BAULIN, N.N.; PILYUGIN, N.N.; SUNTSOV G.N.; CHERNYAVSKII, S.YU.
MECH. INST., MOSCOW STATE UNIV., MOSCOW, USSR
PRIB. TEKH. EKSP. (USSR) VOL.21, NO.5 47-9 SEPT.-OCT. 1978 CODEN: PRTEAJ
Trans in: INSTRUM. AND EXP. TECH. (USA) VOL.21, NO.5, PT.2 1429-31
SEPT.-OCT. 1978 CODEN: INETAK
Treatment: PRACTICAL
Doc. Type: JRNL PAP.
Lang.: ENG.
DESCRIBES THE CONSTRUCTION OF A QUARTZ PIEZOELECTRIC CONVERTER FOR THE MEASUREMENTS OF VARIABLE PRESSURES UP TO 6*?0/SUP 8/ N/M/SUP 2/ WITH A TIME RESOLUTION 7 MUSEC. A METHOD OF CALIBRATION WITH STATIC PRESSURE, IN WHICH NO HIGH-SPEED PRESSURE VALVES ARE NEEDED, IS DESCRIBED.
Desc.: PIEZOELECTRIC TRANSDUCERS; PRESSURE MEASUREMENT; HIGH-PRESSURE TECHNIQUES
Ident.: QUARTZ PIEZOELECTRIC CONVERTER; CALIBRATION; PIEZOELECTRIC TRANSDUCER; PRESSURE MEASUREMENT; 6 X 10/SUP 8/ N/M/SUP 2/
Class Codes: A0735; B7230; B7320V

Y027013 146 
489757 A80027289, B0015947
A SURVEY OF SECONDARY STANDARD GAUGES FOR ACCURATE PRESSURE MEASUREMENT UP TO ABOUT 1 GPA
PEGGS, G.T.
Issued by: NAT. PHYS. LAB., TEDDINGTON, ENG.;
JAN. 1979
18 pp.
Report No.: NPL-MOM-37
Treatment: PRACTICAL
Doc. Type: REPORT
Lang.: ENG. (40 Refs)
SEVERAL RECENTLY DEVELOPED TYPES OF PRACTICAL GAUGE ARE DISCUSSED AND THEIR PERFORMANCES ASSESSED AND COMPARED. TYPES CONSIDERED INCLUDE RESISTANCE GAUGES, ULTRASONIC GAUGES, AND PERMITTIVITY GAUGES.
Desc.: PRESSURE MEASUREMENT; PRESSURE TRANSDUCERS; HIGH-PRESSURE TECHNIQUES; MEASUREMENT STANDARDS
Ident.: SECONDARY STANDARD GAUGES; PRESSURE MEASUREMENT; RESISTANCE GAUGES; ULTRASONIC GAUGES; PERMITTIVITY GAUGES; PRESSURE GAUGE
Class Codes: A0670M; A0730D; A0620H; A0735; B7230; B7320V; B7130

Y027013 147 
467141 C80004419
AUTOMATIC LOGIC CONTROL SYSTEM FOR A FILTER PRESS
EFINOV, V.T.; ZIBOROV, V.S.; MESHENG.R, M.Y.
MEKH. AND AVTOM. PROIZVOD. (USSR) NO.6 23-4, 32 1979 CODEN: MAVPAC
Treatment: APPLIC; PRACTICAL
Doc. Type: JRNL PAP.
Lang.: RUSSIAN
THE FPKAM BELT PRESS FILLERS, WASHES AND PRESSES THE CAKE FROM SUSPENSIONS WITH 10 TO 50 MG/M/SUP 3/ OF SOLIDS. THE PRESS PLATES ARE HORIZONTAL WITH THE FILTER BELT ZIG-ZAGGING THROUGH THE ASSEMBLY. THE ASSEMBLY IS LOCKED BY AN ELECTRICAL PRESS DRIVE. THE PRESS HAS THREE SUPPLY STREAMS; SUSPENSION, WASH WATER AND COMPRESSED AIR FOR CAKE RELEASE. THE WASH AND DISCHARGE CYCLE INITIATED BY A DIFFERENTIAL PRESSURE TRANSDUCER. CAKE PRESSING IS BY VARIABLE CHAMBER PLATES WITH HIGH-PRESSURE WATER FEED. THE LOCAL CONTROL VALVES ARE PNEUMATICALLY ACTUATED. SEQUENCING IS THROUGH AN ELECTRO-PNEUMATIC REMOTE CONTROL PANEL. THE LOGICAL DESIGN AND OPERATIONS OF THE PANEL ARE PRESENTED.
Desc.: MACHINING; CONTROLLERS
Ident.: BELT PRESS FILTER
Class Codes: C3350E; C3220

Y027013 148 
463010 A80014527, B80007076
ACOUSTIC-VELOCITY MEASUREMENT ACROSS THE DIAMETER OF A LIQUID-METAL COLUMN
CALDER, C.A.; WILCOX, T.W.
DEPT. OF MECH. ENG. OREGON STATE UNIV., CORVALLIS, OR, USA
EXP. MECH. (USA) VOL.19, NO.5 171-4 MAY 1979 CODEN: EXMCAZ
Treatment: EXPERIMENTAL
Doc. Type: JRNL PAP.
Lang.: ENG. (6 Refs)
PRESENT TECHNIQUES FOR MEASURING SOUND VELOCITY IN LIQUID METALS HAVE BEEN LIMITED BY THE USE OF TRANSDUCERS WHICH CANNOT SURVIVE IN EXTREME-TEMPERATURE CONDITIONS. THESE METHODS ALSO REQUIRE RELATIVELY LONG MEASUREMENT TIMES. AN OPTICAL NONCONTACTING METHOD USING A MICHELSON DISPLACEMENT INTERFEROMETER HAS BEEN DEVELOPED WHICH MAY BE USED FOR EXTREMELY SHORT EXPERIMENTAL TIMES AND VERY HIGH TEMPERATURE AND PRESSURES. THIS TECHNIQUE IS BEING INCORPORATED INTO AN ISOBARIC-EXPANSION APPARATUS IN WHICH A 1-MM-DIAM WIRE SAMPLE IN A HIGH-PRESSURE ARGON-GAS ENVIRONMENT IS RESISTIVELY HEATED TO MELT WITHIN A TIME PERIOD OF ONLY A FEW MICROSECONDS. BEFORE INSTABILITY OF THE LIQUID COLUMN OCCURS. THERMAL EXPANSION, ENTHALPY AND TEMPERATURE ARE MEASURED. THE ADDITION OF THE SOUND-VELOCITY MEASUREMENT PERMITS A MORE COMPLETE DETERMINATION OF THE THERMOPHYSICAL PROPERTIES OF THE LIQUID METAL.
Desc.: ACOUSTIC WAVE VELOCITY MEASUREMENT; LIQUID METALS; LIGHT INTERFEROMETRY
Ident.: OPTICAL NONCONTACTING METHOD; MICHELSON DISPLACEMENT INTERFEROMETER; ENTHALPY; ACOUSTIC VELOCITY MEASUREMENT; ISOBARIC EXPANSION APPARATUS; LIQUID METAL COLUMN; THERMAL EXPANSION
Class Codes: A4385; A0760L; B7320Z

Y027013 149 
460443 A80011606
NEW TECHNIQUE TO STUDY EFFECTS OF INTERNAL AND EXTERNAL GAS PRESSURE IN CERAMICS
ABBOTT, R.C.; SOLOMON, A.A.
PURDUE UNIV., WEST LAFAYETTE, IN, USA
AM. CERAM. SOC. BULL. (USA) VOL.58, NO.4 470-2 APRIL 1979 CODEN: ACSBA7
Treatment: EXPERIMENTAL
Doc. Type: JRNL PAP.
Lang.: ENG. (12 Refs)
A NEW TECHNIQUE WAS DEVELOPED TO STUDY THE EFFECTS OF INTERNAL AND EXTERNAL GAS PRESSURE ON THE DIMENSIONAL STABILITY OF CERAMICS. SPECIMENS ARE SINTERED IN A PLATINUM-LINED REFRACTORY METAL PRESSURE VESSEL UNDER VARIABLE AMBIENT PRESSURES FROM 15 MUM VACUUM TO 700 KG/CM/SUP 2/ AND TEMPERATURES TO 1300 DEGREESC. A SPECIAL HIGH PRESSURE TRANSDUCER CONTINUOUSLY MONITORS SPECIMEN LENG.PRESSURES CAN BE CHANGED AFTER PORE CLOSURE TO ACCURATELY MEASURE EITHER SWELLING OR HOT PRESSING UNDER KNOWN DRIVING FORCES.
Desc.: HOT PRESSING; SWELLING; CERAMICS; SINTERING
Ident.: EXTERNAL GAS PRESSURE; CERAMICS; DIMENSIONAL STABILITY; SWELLING; HOT PRESSING; INTERNAL GAS PRESSURE
Class Codes: A8120L; A8120E

Y027013 150 
459362 A80010338
MEASUREMENTS OF THE COHERENT STRUCTURE OF BOUNDARY LAYER TURBULENCE AT A HIGH SUBSONIC SPEED
BARRA, V.; HOZUMI, K.
ANTONIO FERRI LAB., NEW YORK UNIV., WESTBURY, NY, USA
Sponsor: IEEE
ICIASF '79 RECORD. INTERNATIONAL CONGRESS ON INSTRUMENTATION IN AEROSPACE SIMULATION FACILITIES 257-65 1979
24-26 SEPT. 1979 MONTEREY, CA, USA
Publ: IEEE, NEW YORK, USA
327 pp.
Treatment: PRACTICAL
Doc. Type: CONF. PAP.
Lang.: ENG. (30 Refs)
THE INSTRUMENTATION AND DATA ANALYSIS PROCEDURES UTILIZED TO STUDY THE ORGANIZED NATURE OF BOUNDARY LAYER TURBULENCE ARE DESCRIBED. MEASUREMENTS IN THE BOUNDARY LAYER CONSIST OF THE STREAMWISE VELOCITY AND WALL-SHEAR USING MINIATURE HOTFILM SENSORS AND CONSTANT TEMPERATURE ANEMOMETERS, AND WALL-PRESSURE USING PIEZORESISTANCE TRANSDUCERS AND LOW-NOISE DIFFERENTIAL AMPLIFIERS. PROCEDURES FOR RECORDING, DIGITIZING, AND ANALYZING THE FLUCTUATING COMPONENTS OF THESE MEASUREMENTS WITH THE AID OF A MINI-COMPUTER SYSTEM ARE OUTLINED. THE DIGITAL ANALYSES PERFORMED INCLUDE CONVENTIONAL FOURIER TRANSFORM AND TIME-AVERAGED CORRELATION, AS WELL AS CONDITIONAL SAMPLING TO OBTAIN ENSEMBLE AVERAGED TIME SIGNATURES AND CORRELATIONS OF THE FLUCTUATIONS FOR COHERENT EVENTS IN THE FLOW. REPRESENTATIVE RESULTS OBTAINED FROM THESE ANALYSES FOR THREE FREE STREAM CONDITIONS ARE PRESENTED.
Desc.: FLOW MEASUREMENT; BOUNDARY LAYER TURBULENCE
Ident.: COHERENT STRUCTURE; HIGH SUBSONIC SPEED; INSTRUMENTATION; DATA ANALYSIS; BOUNDARY LAYER TURBULENCE; CONSTANT TEMPERATURE ANEMOMETERS PIEZORESISTANCE TRANSDUCERS; FOURIER TRANSFORM; STREAMWISE VELOCITY; WALL SHEAR; WALL PRESSURE; LOW NOISE DIFFERENTIAL AMPLIFIERS; TIME AVERAGED CORRELATION
Class Codes: A4780; A4725F; A4740