Download or read book Evaluation of a high temperature pressure transducer for use as a force transducer written by J. A. Aikin and published by . This book was released on 1983 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Pressure Transducer Performance and Measurement Trade Offs in a Transient High Temperature Combustion Environment written by and published by . This book was released on 1995 with total page 54 pages. Available in PDF, EPUB and Kindle. Book excerpt: At the U.S. Army Research Laboratory (ARL), a series of tests were performed in a 120mm cannon to characterize the effects of transducer type, transducer port configuration, thermal protection media, and severe mechanical forces on the amplitude and frequency response of the pressure measurement. A ring of five pressure transducer ports (72 deg apart)) was machined 2.6 m from the rear face of a 12Omm gun trade. The physical configuration of the transducer ports consisted of three single-diameter ports with varying standoff distances, a conventional two-diameter port, and blind port. As the projectile passed the longitudinal position the pressure transducers were exposed to a transient, high temperature environment which allowed the investigators to study the fidelity of the pressure measurement under transient, high temperature, mechanically adverse gun conditions. These tests demonstrated that the use of single-diameter pressure ports with cavity depths of 0.254 mm (0.010 in) and 0.711 mm (0.028 in) win more accurately characterize the oscillatory nature of the pressure measurement than would the use of a single-diameter port with a cavity depth of 1.6O0mm (0.063 in). In addition, the combustion chamber of the weapon was also highly instrumented with pressure transducers in an attempt to evaluate the effects of various transducer types and thermal protection greases on the magnitude of the pressure measurement. This study showed that the Kistler 6211 pressure transducer (quartz) reads about 5% higher than the E30MA pressure transducer (normaline) in both the forward and rear of the chamber. No conclusion could be reached as to which gage gives the more correct quasi-steady-state pressure level.
Download or read book High Temperature Pressure Transmitter Evaluation written by W. R. Miller and published by . This book was released on 1958 with total page 46 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book The Effects of Extended High temperature Storage on the Performance Characteristics of Several Strain Gage Pressure Transducers written by Randolph Williams and published by . This book was released on 1969 with total page 28 pages. Available in PDF, EPUB and Kindle. Book excerpt: This publication reports the results of a test program to evaluate the effects of high-temperature storage in the performance characteristics of several types of commercial strain gage pressure transducers. The results obtained indicate shifts in the zero pressure output and the sensitivity, some of which are permanent. The equipment used and the procedure followed are described.
Download or read book Indwelling and Implantable Pressure Transducers written by D.G. Flemming and published by CRC Press. This book was released on 2018-01-18 with total page 224 pages. Available in PDF, EPUB and Kindle. Book excerpt: In the first two chapters of this book there is information about the needs and potential applications of indwelling transducers both present and past, and will go into detail about many topics such as the fundaments of blood pressure transducers, studies of the intestinal motility and clinical aspects of cardiovascular pressure measurements. Chapters 3, 4 & 5 explain and give information on manufacturers considerations of indwelling pressure transducer, specifications of commercial pressure transducers. Research and development of indwelling pressure transducer, explaining the principles of pressure transducer, biomedical applications. And then they move onto future directions for implant pressure transducers and the users point of view. This book covers a wide spectrum on indwelling pressure transducers.
Download or read book Experimental Evaluation of a Dual element Transducer for High temperature gas Measurements written by J. T. Chambers and published by . This book was released on 1963 with total page 47 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book High Temperature Pressure Transducer Mk I written by L. H. Thacker and published by . This book was released on 1962 with total page 56 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Analysis and Design of a High Temperature Differential Capacitive Pressure Transducer written by Charles Oster and published by . This book was released on 1981 with total page 82 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Development of Pressure Transducer Instrumentation for Evaluation of Eruptive Forces written by Terry V. Gruelle and published by . This book was released on 1977 with total page 168 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Development of a Pressure Transducer for Usage in High temperature and Vibration Environments written by H. T. Liu and published by . This book was released on 1984 with total page 61 pages. Available in PDF, EPUB and Kindle. Book excerpt: The objective of the Phase I project is to determine the feasibility of developing a highly accurate, low-range pressure transducer that is suitable for measurement in environments where high vibrations, high temperatures and varying line pressures create problems for presently available transducers. The primary sensor is an elastic metal diaphragm that forms one plate of a capacitor; the other plate is fixed with respect to the diaphragm. An electronic circuit converts the diaphragm deflections, induced by a pressure force, into voltage variations that are then sampled by a microprocessor, which is to be developed in Phase II. Because of the small oscillating mass of the diaphragm, the transducer has a high natural frequency and is largely insensitive to externally induced vibrations. The simple configuration of the capacitive transducer is potentially very large overloads with appropriate installation of an overload stop between the two plates. In comparison with other types of pressure sensors, the capacitive transducer concept offers an unusual amount of design flexibility for a wide range of operational conditions. Phase I research demonstrated the feasibility of the capacitive transducer concepts, as well as its capability to meet and potentially exceed all DoD requirements for transducer performance. (Author).
Download or read book Digital Pressure Transducer for Use at High Temperatures written by and published by . This book was released on 1981 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: A digital pressure sensor for measuring fluid pressures at relatively high temperatures includes an electrically conducting fiber coupled to the fluid by a force disc that causes tension in the fiber to be a function of fluid pressure. The tension causes changes in the mechanical resonant frequency of the fiber, which is caused to vibrate in a magnetic field to produce an electrical signal from a positive-feedback amplifier at the resonant frequency. A count of this frequency provides a measure of the fluid pressure.
Download or read book Technical Abstract Bulletin written by and published by . This book was released on with total page 908 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Scientific and Technical Aerospace Reports written by and published by . This book was released on 1995 with total page 704 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book A High Temperature Assessment of Air cooled Unsteady Pressure Transducers written by Derek G. Ferguson and published by . This book was released on 1997 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: Presented at the International Gas Turbine & Aeroengine Congress & Exhibition, Orlando, FL, Jun 2-Jun 5, 1997.
Download or read book High Temperature Pressure Transducers written by David J. First and published by . This book was released on 1969 with total page 55 pages. Available in PDF, EPUB and Kindle. Book excerpt: This report describes work which was carried out toward the design and evaluation of a solid state transducer intended to operate from -50 to +350C and to sustain exposure to 450C. A flaw, partly affecting the fabrication and partly affecting the operation of the device was discovered in the use of silicon as both diaphragm and gauges. Another design approach is presented in which silicon gauges are bonded to a thin beam which is deflected by a metal diaphragm. Means of making high temperature electrical contacts to silicon are presented, as well as methods to join silicon to the structure. Data for the stability of the gauging system and contacts at elevated temperatures are given. (Author).
Download or read book Conception and Optimization of a Piezo optic Pressure Transducer written by Mathieu Guilhem and published by . This book was released on 2010 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: The measurement of pressure is a field that has been studied for centuries due to its important technological implications. Our goal is to propose an original method to measure high hydrostatic pressures using a low cost optical sensor. A number of pressure sensors have been developed over the years, and the first part of this work presents an overview of the main ones. We then focus on optical pressure sensors, discuss the advantages and inconveniences of each method with regards to our constraints, and decide to develop the concept of a sensor based on the piezo-optic effect, i.e. the stress-induced birefringence in a transparent dielectric subjected to a force. We presents the tools that will be used to modelize the piezo-optic pressure sensor: we first review the theory of polarization of light, from its physical origin to the Mueller-Stokes formalism; we then focus on the interaction of polarized light with matter: we discuss the theory of the piezooptic effect and the polarization effects of total and partial reflections at an interface. Both effects are modelized in terms of their Mueller matrices. We then propose an original concept for a pressure sensor, using an approach different from the one usually seen in polarimetric sensors. First the concept of a piezo-optic pressure sensor is presented where polarized light interacts with a dielectric material subjected to a pressure; the resulting state of polarization is analyzed by a second polarizer and a photodetector. Some aspects of the sensor are optimized while its shortcomings are listed. In light of this analysis we propose a revised concept to addresses these issues. The new proposal uses carefully oriented reflections to replace all polarizing elements, enabling simpler and cheaper production. We modelize this device, analyze its optical behavior, and then present the different sources of measurement error. Most of them are negligible, and we present methods to mitigate the influence of these that are not. Part IV focuses on the experimental validation of the concepts presented so far. We describe the conception, calibration and validation of a Fourier Transform Mueller polarimeter that we intend to use to study the temperature dependence of the piezo-optic effect. We build a prototype based on the initial concept of the piezo-optic pressure sensor presented in Part III, and test its response to pressure. Its behaviour is found to be coherent with theoretical predictions, and these measurement serve to validate the concept of the sensor that was developed during this work.
Download or read book Energy Research Abstracts written by and published by . This book was released on 1989 with total page 760 pages. Available in PDF, EPUB and Kindle. Book excerpt:
