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

被引：3
|
作者：
Li S. [1 ]
Liu X. [1 ]
Li Y. [2 ]
Yang S. [1 ]
Liu C. [1 ]
机构：
[1] College of Optoelectronic Science and Engineering, Huazhong University of Science and Technology, Wuhan
[2] School of Foreign Languages, Wuhan University of Technology, Wuhan
来源：
Frontiers of Optoelectronics in China | 2009年 / 2卷 / 2期
关键词：
crosssensitivity effect; fiber-optic gratings; oil/gas down-hole; sensor; temperature measurement;
D O I：
10.1007/s12200-009-0042-8
中图分类号：
学科分类号：
摘要：
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 cross-sensitivity 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. © 2009 Higher Education Press and Springer-Verlag GmbH.
引用
收藏
页码：233 / 238
页数：5
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