基于一种高精度解调法的布里渊温度传感系统  

Brillouin Temperature Sensing System Based on a High-precision Demodulation Method

作　　者：欧中华[1] 李应辉[2] 张利勋[1] 刘永智[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 [2]重庆光电技术研究所,重庆400060

出　　处：《半导体光电》2009年第4期610-613,共4页Semiconductor Optoelectronics

基　　金：电子科技大学青年基金资助项目

摘　　要：针对采用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存在的系统温漂及光纤应力等噪声因素影响,提出了采用多个已知分段温度分布曲线来解调待测温度分布曲线,取其平均值作为测量值的新方法。系统实验表明,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,降低系统成本,系统的测温精度达到±0.07 K。In order to restrain the influences caused by the factors of temperature shift and the strain of optical fiber in distributed optical fiber Brillouin temperature sensing system, which applies the scattering intensity demodulation method of Rayleigh scattering and Brillouin scattering, proposed is a high-precision demodulation method which uses the known temperature curves in several regions to demodulate the test temperature curves and takes the average value as the test value. System experimental results indicate that applying this new Brillouin temperature sensing system, the temperature testing precision is highly improved to 0.07 K, as well as the stability and the cost of the system is reduced efficiently.

关 键 词：高精度解调法 瑞利散射 布里渊散射 分布式光纤温度传感器 

分 类 号：TP212.11[自动化与计算机技术—检测技术与自动化装置]