Frontiers of Optoelectronics, 2009, 2 (2): 233, 网络出版: 2012-10-08   

FBG sensing temperature characteristic and application in oil/gas down-hole measurement

FBG sensing temperature characteristic and application in oil/gas down-hole measurement
作者单位
1 College of Optoelectronic Science and Engineering, Huazhong University of Science and Technology, Wuhan 430074, China
2 School of Foreign Languages, Wuhan University of Technology, Wuhan 430079, China
摘要
Abstract
Fiber Bragg gratings (FBGs) have been used to sense numerous parameters such as strain, temperature, and pressure. Cost-effective multipoint measurements have been achieved by connecting FBGs in parallel, serial, and other topologies as well as by using spatial, wavelength, and time-domain multiplexing techniques. This paper presents a method of measuring temperature of the oil/gas down-hole. Detailed contents include the basic theory and characteristics of fiber gratings, analysis of the sensing mechanism of fiber-optic gratings, and the crosssensitivity effect between temperature and strain; the method of making the light-source of the fiber-optic gratings and the technology of measuring wavelength shift, building an experimental system of the temperature measurement, and dealing with the experimental data. The paper makes a comparison of several kinds of FBG sensing systems used in oil/gas down-hole to measure temperature and the analysis of the experimental results of building the temperature measurement experimental system. It demonstrates that the fiber-optic grating sensing method is the best choice in all methods of measuring temperature in oil/gas down-hole, which has a brilliant applied prospect.
参考文献

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Shaomin LI, Xiaoying LIU, You LI, Shenlong YANG, Chong LIU. FBG sensing temperature characteristic and application in oil/gas down-hole measurement[J]. Frontiers of Optoelectronics, 2009, 2(2): 233. Shaomin LI, Xiaoying LIU, You LI, Shenlong YANG, Chong LIU. FBG sensing temperature characteristic and application in oil/gas down-hole measurement[J]. Frontiers of Optoelectronics, 2009, 2(2): 233.

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