光纤布里渊温度和应变分布同时传感方法研究  

Study on the simultaneous distributed measurement of temperature and strain based on Brillouin scattering in optical fiber

作　　者：张吉生[1] 李永倩[1] 

机构地区：[1]华北电力大学电子与通信工程系,河北保定071003

出　　处：《光通信研究》2008年第5期53-56,共4页Study on Optical Communications

基　　金：国家"八六三"计划资助课题(2006AA09Z141);教育部留学回国人员科研启动基金资助课题(教外司留[2005]383号);华北电力大学留学回国人员科研基金资助课题(20041401)

摘　　要：布里渊分布型光纤温度和应变同时传感的方法主要有3种:布里渊散射谱双参量同时测量的方法、双布里渊频移同时测量的方法及联合拉曼散射和布里渊散射效应法。文章对这3种方法进行了深入的研究,阐述了实现各种方法的具体方案,并对其性能及成本进行了比较,给出了一种可实现温度和应变高精度同时测量的传感方案。For simultaneous distributed measurement of temperature and strain based on Brillouin scattering in optical fibers, there are mainly three effective ways： measuring the Brillouin intensity and Brillouin shift simultaneously, measuring two different Brillouin shifts and monitoring the temperature and strain based on the Raman scattering and Brillouin scattering. In this paper, the principles of these methods have been discussed thoroughly. Two schemes for Brillouin distributed sensing using direct detection and heterodyne detection are studied and a performance and cost comparison between them is made. Finally, a sensing scheme capable of realizing simultaneous measurement of temperature and strain with high accuracy is presented.

关 键 词：布里渊光时域反射计 温度 应变 朗道比 

分 类 号：TP212[自动化与计算机技术—检测技术与自动化装置]