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Self-compensating fiber optic flow sensor having an end of a fiber optics element and a reflective surface within a tube

United States Patent

May 16, 2006
View the Complete Patent at the US Patent & Trademark Office
A flow rate fiber optic transducer is made self-compensating for both temperature and pressure by using preferably well-matched integral Fabry-Perot sensors symmetrically located around a cantilever-like structure. Common mode rejection signal processing of the outputs allows substantially all effects of both temperature and pressure to be compensated. Additionally, the integral sensors can individually be made insensitive to temperature.
Peng; Wei (Blacksburg, VA), Qi; Bing (Blacksburg, VA), Wang; Anbo (Blacksburg, VA)
Virginia Tech Intellectual Properties, Inc. (Blacksburg, VA)
10/ 653,920
September 4, 2003
STATEMENT OF GOVERNMENT INTEREST This invention was made with government support under contract Number DE-FT26-98BC15167 awarded by the U.S. Department of Energy. The Government has certain rights in the invention.