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Design of fiber optic F-P cavity pressure sensor based on corrugated diaphragm
Author(s): Qingchao Zhao; Xiaohui Liu; Long Ma; Wenan Zhao; Hongzhong Wang
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Paper Abstract

To meet the need of the measurement in high temperature and high pressure in oil and gas well, an optical fiber extrinsic Fabry Perot(F-P) cavity pressure sensor based on corrugated diaphragm is developed. The measured medium is isolated from the fiber F-P cavity by corrugated diaphragm which can transmit pressure simultaneously. The probe of the sensor is fabricated by hydrogen and oxygen flame thermal bonding in high temperature technique, and the change of the senor’s cavity length is compensated in temperature changing with cascading fiber bragg grating, and the sensor has characteristics of large dynamic range, high resolution, high repeatability, long term operation stability and high temperature resistance. The pressure measuring range is 0~69MPa, the repeatability is 0.01% F·S, the hysteresis is less than 0.01% F·S, the long term stability is less than 0.02MPa/y, and the sensor can satisfy the requirement of the measurement in the oil and gas well.

Paper Details

Date Published: 25 October 2017
PDF: 6 pages
Proc. SPIE 10464, AOPC 2017: Optical Information and Network (Optical Fiber Sensors), 104641M (25 October 2017); doi: 10.1117/12.2285300
Show Author Affiliations
Qingchao Zhao, Shandong Academy of Sciences (China)
Xiaohui Liu, Shandong Academy of Sciences (China)
Long Ma, Shandong Academy of Sciences (China)
Wenan Zhao, Shandong Academy of Sciences (China)
Hongzhong Wang, Xinsheng Petroleum Exploration Technical Service Co., Ltd. (China)


Published in SPIE Proceedings Vol. 10464:
AOPC 2017: Optical Information and Network (Optical Fiber Sensors)
Zi-Sen Zhao; Leping Wei; Yanbiao Liao; Weixu Zhang; Desheng Jiang; Wei Wang; Kenneth T. V. Grattan, Editor(s)

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