Multi-point fiber optic hydrogen sensor system for detection of cryogenic leaks in aerospace applications

Edgar A. Mendoza; Lothar U. Kempen; Anil Menon; Eugene Durets; Steve Pflanze; Robert A. Lieberman; Alex A. Kazemi

doi:10.1117/12.417403

1 March 2001 Multi-point fiber optic hydrogen sensor system for detection of cryogenic leaks in aerospace applications

Edgar A. Mendoza, Lothar U. Kempen, Anil Menon, Eugene Durets, Steve Pflanze, Robert A. Lieberman, Alex A. Kazemi

Proceedings Volume 4204, Fiber Optic Sensor Technology II; (2001) https://doi.org/10.1117/12.417403
Event: Environmental and Industrial Sensing, 2000, Boston, MA, United States

Abstract

This paper describes progress in the development of a multi-point fiber optic micro sensor (optrode) based on a hydrogen gas sensitive chemistry immobilized in an optically transparent porous substrate. The hydrogen sensitive chemistry is fully reversible and has demonstrated a response to hydrogen gas in the range of 0% to 10% with a resolution of 0. 1 % and a response time of ?5 seconds measured at a gas flow rate of 1 cc/mm. The optical signature of the optrode in the visible spectrum varies proportionally to the local hydrogen gas concentration. The multi-point hydrogen sensing system uses temperature compensated hydrogen optrodes mounted at the tip of optical fibers. The hydrogen optrodes are distributed at multiple locations along a fiber optic cable-based network. A multi-channel optoelectronic sensor readout unit monitors the hydrogen and temperature response of the individual optrodes in real time and communicates this information via a serial communication port to a remote laptop computer.

Citation Download Citation

Edgar A. Mendoza, Lothar U. Kempen, Anil Menon, Eugene Durets, Steve Pflanze, Robert A. Lieberman, and Alex A. Kazemi "Multi-point fiber optic hydrogen sensor system for detection of cryogenic leaks in aerospace applications", Proc. SPIE 4204, Fiber Optic Sensor Technology II, (1 March 2001); https://doi.org/10.1117/12.417403

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