Passive Wireless Cryogenic Liquid Level Sensors Using Orthogonal Frequency Coded Acoustic Wave Devices, Phase I

Metadata Updated: August 1, 2018

This proposal describes the development of passive wireless surface acoustic wave (SAW) based liquid level sensors for NASA application to cryogenic liquid level sensing. Orthogonal Frequency Coded (OFC) SAW devices have been demonstrated as passive wireless temperature sensors in NASA Contract NNK04OA28C, and are being further developed under NNK05OB31C. The proposed liquid level sensors will use damping of the acoustic wave caused by mass loading of the liquid to produce fast, reversible liquid level sensors. The proposed research will apply the results of ongoing work on OFC sensors and will evaluate their operation as liquid level sensors in selected liquids of interest at cryogenic temperatures. Issues to be investigated include the stability of various SAW substrates when exposed to various (extreme and gradual) temperature changes, the effects on device integrity and performance of thermal cycling to cryogenic temperatures, and the effects of device exposure to various liquids and the reversibility thereof. The result of the proposed research will be an understanding of potential failure mechanisms in SAW sensors used at cryogenic temperatures, knowledge of the required operating parameters to ensure device reliability under likely operating conditions, and demonstration of the use of OFC SAW sensors for liquid level detection.

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Public: This dataset is intended for public access and use. License: U.S. Government Work

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Metadata Created Date August 1, 2018
Metadata Updated Date August 1, 2018

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Harvested from NASA Data.json

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Resource Type Dataset
Metadata Created Date August 1, 2018
Metadata Updated Date August 1, 2018
Publisher Space Technology Mission Directorate
Unique Identifier TECHPORT_10081
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TECHPORT SUPPORT
Maintainer Email
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Harvest Source Title NASA Data.json
Data First Published 2007-01-01T08:00:00.000Z
Homepage URL https://techport.nasa.gov/view/10081
Language en-US
License http://www.usa.gov/publicdomain/label/1.0/
Data Last Modified 2017-09-16T00:00:00.000Z
Program Code 026:027
Publisher Hierarchy National Aeronautics and Space Administration > Space Technology Mission Directorate
Source Datajson Identifier True
Source Hash 4aa4968614dcd38e37ca79333bf39b40531b8e00
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