The working principle, characteristics and technical performance of the optical fiber valve position feedback device developed by optical fiber sensing technology are introduced. The GFH series optical fiber valve position feedback device developed and produced by Wuhan University of Technology Optical Fiber Sensing Technology Co., Ltd. passed the achievement appraisal of China Petrochemical Corporation in 1999. It has been widely used in steel, petrochemical and other industries. The longest service life has reached 5 years. It is a new type of valve position feedback device with relatively high performance and price and is promising. Keywords: optical fiber sensor; valve position feedback device; measurement; principle; characteristics Abstract: The Principal, Character and Specification of GFH optical fiber valve position put forward by application ofOptic Fiber sensing technology is introduced.Keywords: FOS; valve position; measurement; principal; character
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