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1 March 2001 Fiber optical liquid level sensor under cryogenic environment
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Proceedings Volume 4204, Fiber Optic Sensor Technology II; (2001)
Event: Environmental and Industrial Sensing, 2000, Boston, MA, United States
This paper reports a preliminary experimental investigation and characterization of an optical fiber based liquid level detection system for applications in aerospace industry. The sensor system is composed of a multiplexed array of point liquid probes. Two different designs of the probe were fabricated and tested. Probe tests were conducted in water/air and liquidlgas nitrogen environments. Response speed of the liquid probe was measured and compared experimentally with a Linear Variable Differential Transducer (LVDT). In addition, the multiplexing of multiple liquid probes using an OTDR device was successfully demonstrated. Finally, a novel liquid probe made by direct polishing the fiber tip is proposed, which may provide further miniaturization and performance improvements.
© (2001) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Chengning Yang, Steve Chen, and Alex A. Kazemi "Fiber optical liquid level sensor under cryogenic environment", Proc. SPIE 4204, Fiber Optic Sensor Technology II, (1 March 2001);

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