Wireless pressure sensor using laser targeting of silicon carbide

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Date
2007-01-01
Authors
Riza, Nabeel A.
Ghauri, Farzan N.
Perez, Frank
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Society of Photo-optical Instrumentation Engineers (SPIE)
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Abstract
To the best of our knowledge, proposed is the first extreme-environment wireless pressure sensor design using a remoted single-crystal SiC chip within a pressurized capsule. A detailed theoretical analysis of the sensor system is performed, including the SiC chip's mechanical response within the pressure capsule and the pressure measurement technique's optical response based on image demagnification. The remote sensor was experimentally tested at room temperature for pressures up to 41 atm, and the sensor response is consistent with the theoretical analysis. The demonstrated sensor has a current experimental resolution of 1.17 atm with a designed maximum pressure range of 140 atm. Improved sensing resolution and range can be achieved via optimal selection of the SiC chip's dimensions and its seating in the pressure capsule. Applications for this sensor include extreme environments involving hot gases and corrosive fluids, as in power generation systems, oil field operations, and aerospace systems.
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Keywords
Optical sensors , Pressure sensor , Extreme environments , Silicon carbide , Sensors , Charge-coupled devices , Environmental sensing , Optical engineering , Mirrors
Citation
Riza, N. A., Ghauri, F. N. and Perez, F. (2007) 'Wireless pressure sensor using laser targeting of silicon carbide', Optical Engineering 46(1), 014401 (9 pp). doi: 10.1117/1.2432885
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© 2007 Society of Photo-Optical Instrumentation Engineers (SPIE). One print or electronic copy may be made for personal use only. Systematic reproduction and distribution, duplication of any material in this paper for a fee or for commercial purposes, or modification of the content of the paper are prohibited.