一种新型解调法的光纤布里渊温度传感系统  

Distributed Optical Fiber Brillouin Temperature Sensing System Based on a Novel Demodulation Method

作　　者：欧中华[1] 刘永智[1] 张利勋[1] 代志勇[1] 彭增寿[1] 

机构地区：[1]电子科技大学光电信息学院,成都610054

出　　处：《光电工程》2009年第7期136-139,共4页Opto-Electronic Engineering

基　　金：电子科技大学青年基金资助项目

摘　　要：在基于瑞利散射和布里渊散射强度解调的分布式光纤布里渊温度传感系统中,为了抑制系统温漂和光纤中的应力等噪声因素影响,提出了采用最近已知温度分布曲线来解调待测温度分布曲线的新方法,并在设计的传感系统中进行了实验。实验结果表明,采用该解调法的分布式光纤布里渊温度传感系统能有效提高测温精度和稳定性,降低了系统的成本。系统的测温精度达到±0.09 K。In order to restrain the system temperature shift and the strain of optical fiber in the distributed optical fiber BriHouin temperature sensing system which is based on the demodulation method with the intensity of Rayleigh scattering and Briliouin scattering, a novel method, which uses the latest known temperature curve to demodulate the test temperature curve, is proposed and the experimental system is designed. The experimental result shows an excellent agreement with the theory, and it indicates that the Brillouin temperature sensing system based on the new demodulation method can improve the temperature precision, stability, and reduce the cost of the system efficiently. Moreover, the temperature test precision of the system reaches ±0.09 K.

关 键 词：瑞利散射 布里渊散射 分布式光纤温度传感器 解调法 

分 类 号：TP212.11[自动化与计算机技术—检测技术与自动化装置]