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
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.
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.