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Book Cryogenic Pressure Calibrator for Wide Temperature Electronically Scanned ESP Pressure Modules

Download or read book Cryogenic Pressure Calibrator for Wide Temperature Electronically Scanned ESP Pressure Modules written by Nettie D. Faulcon and published by . This book was released on 2001 with total page 24 pages. Available in PDF, EPUB and Kindle. Book excerpt: Electronically scanned pressure modules have been developed that can operate in ambient and in cryogenic environments, particularly Langley's National Transonic Facility (NTF). Because they can operate directly in a cryogenic environment, their use eliminates many of the operational problems associated with using conventional modules at low temperature. To ensure the accuracy of these new instruments, calibration process by means of the simulation laboratory, the system inputs and outputs and the analysis of the calibration data. Calibration results of module M4, a wide temperature ESP module with 16 porst and a pressure range of +4 psid are given.

Book Development of an Electronically Scanned Pressure Module for Operation at Cryogenic Temperatures

Download or read book Development of an Electronically Scanned Pressure Module for Operation at Cryogenic Temperatures written by National Aeronautics and Space Administration (NASA) and published by Createspace Independent Publishing Platform. This book was released on 2018-08-20 with total page 32 pages. Available in PDF, EPUB and Kindle. Book excerpt: Pressure and temperature characteristics were measured for a number of multichannel electronically scanned pressure sensors. The tests were made on commercially available units designed to operate in a controlled temperature environment. Measurements of zero shift, sensitivity, and nonlinearity for each transducer were taken over a temperature range from 100 K to 340 K using a computer controlled data acquisition system. The units tested failed to meet accuracy specifications over the complete temperature range, which was expected. However, the sensors showed acceptable and predictable behavior over the temperature range from approximately -40 C (233 K) to 70 C (343 K). It was determined that a combination of local heating and accurate temperature monitoring can result in a device that can be compensated for temperature as well as its other physical properties. The design of a prototype for operation in a cryogenic environment is proposed, and a method for compensation is developed. Johnson, Preston B. and Ash, Robert L. Unspecified Center NAS1-17993; RTOP 505-61-01-05...

Book Cryogenic Pressure Calibrator for Wide Temperature Electronically Scanned Esp Pressure Modules

Download or read book Cryogenic Pressure Calibrator for Wide Temperature Electronically Scanned Esp Pressure Modules written by National Aeronautics and Space Adm Nasa and published by Independently Published. This book was released on 2018-10-02 with total page 36 pages. Available in PDF, EPUB and Kindle. Book excerpt: Electronically scanned pressure (ESP) modules have been developed that can operate in ambient and in cryogenic environments, particularly Langley's National Transonic Facility (NTF). Because they can operate directly in a cryogenic environment, their use eliminates many of the operational problems associated with using conventional modules at low temperatures. To ensure the accuracy of these new instruments, calibration was conducted in a laboratory simulating the environmental conditions of NTF. This paper discusses the calibration process by means of the simulation laboratory, the system inputs and outputs and the analysis of the calibration data. Calibration results of module M4, a wide temperature ESP module with 16 ports and a pressure range of +/- 4 psid are given. Faulcon, Nettie D. Langley Research Center NASA/TM-2001-211031, L-18098, NAS 1.15:211031

Book Scientific and Technical Aerospace Reports

Download or read book Scientific and Technical Aerospace Reports written by and published by . This book was released on 1995 with total page 652 pages. Available in PDF, EPUB and Kindle. Book excerpt: Lists citations with abstracts for aerospace related reports obtained from world wide sources and announces documents that have recently been entered into the NASA Scientific and Technical Information Database.

Book A Hybrid Electronically Scanned Pressure Module for Cryogenic Environments

Download or read book A Hybrid Electronically Scanned Pressure Module for Cryogenic Environments written by and published by . This book was released on 1995 with total page 16 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Book NASA Langley Scientific and Technical Information Output 2000

Download or read book NASA Langley Scientific and Technical Information Output 2000 written by and published by . This book was released on 2001 with total page 162 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Book NASA Technical Memorandum

Download or read book NASA Technical Memorandum written by and published by . This book was released on 1982 with total page 122 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Book Government Reports Announcements Index

Download or read book Government Reports Announcements Index written by and published by . This book was released on 1988 with total page 1132 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Book Airborne Lidar Experiments at the Savannah River Plant

Download or read book Airborne Lidar Experiments at the Savannah River Plant written by William B. Krabill and published by . This book was released on 1987 with total page 776 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Book NASA Tech Briefs

Download or read book NASA Tech Briefs written by and published by . This book was released on 1999 with total page 1004 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Book Multi channel Electronically Scanned Cryogenic Pressure Sensor

Download or read book Multi channel Electronically Scanned Cryogenic Pressure Sensor written by John J. Chapman and published by . This book was released on 1995 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: "There are currently 17 cryogenic wind tunnels in operation worldwide, most operate in a temperature range of - 190°C to + 70°C. The coldest temperature falls approximately 140°C below the lowest mil-spec temperature for the performance rating of electronic components. Cryogenics is used to lower flow temperatures to achieve high Reynolds numbers by increasing flow density. These low temperatures present problems with instrumentation hardware designed to measure pressure when subjected to this cold environment. A miniature, multi-channel, electronically scanned pressure measuring device uses electrostatically bonded silicon dies in a multi-element array. These dies are bonded at specific sites on a Pyrex 7740 glass substrate pre-patterned with gold circuit traces. In addition, thermal data is multiplexed and recorded on each individual pressure measuring diaphragm. Novel aspects of the present invention include the ability to function in a cryogenic environment without the need of heaters to keep the sensor at constant temperatures. The fabrication technique and materials used produce an instrument that will deliver repeatable data each time it is thermal cycled without recalibration. In addition, each pressure measuring component has its own temperature sensor, thereby eliminating thermal offset errors due to changing temperatures."--Page i.