Fiber optical liquid level sensor under cryogenic environment

Chengning Yang; Steve Chen; Alex A. Kazemi

doi:10.1117/12.417426

1 March 2001 Fiber optical liquid level sensor under cryogenic environment

Chengning Yang, Steve Chen, Alex A. Kazemi

Proceedings Volume 4204, Fiber Optic Sensor Technology II; (2001) https://doi.org/10.1117/12.417426
Event: Environmental and Industrial Sensing, 2000, Boston, MA, United States

Abstract

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.

Citation Download Citation

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); https://doi.org/10.1117/12.417426

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