Mach-Zehnder干涉仪差分检测布里渊温度和应变同时传感系统  

Simultaneous sensing system of temperature and strain based on Mach-Zehnder interferometer differential detection of Brillouin scattering

作　　者：李永倩[1] 李卓明[1] 何玉钧[1] 宋文妙[1] 

机构地区：[1]华北电力大学电气与电子工程学院,河北保定071003

出　　处：《华北电力大学学报（自然科学版）》2007年第3期27-30,共4页Journal of North China Electric Power University：Natural Science Edition

摘　　要：分析了基于自发布里渊散射的温度和应变分布同时测量原理,针对已报导的外差检测和直接检测系统中存在的问题,提出了一种基于单通光纤Mach-Zehnder干涉仪(MZI)的双端差分检测布里渊温度和应变同时传感系统,通过理论分析证明了系统的可行性。该系统具有成本低,实现简单,可消除光源频率不稳定性干扰等特点,在分布式光纤温度和应变同时测量中具有广阔的应用前景。The theory of simultaneous measurement of temperature and strain based on Brillouin scattering is analyzed. By analyzing the problems of the present methods, an all fiber Mach-Zehnder interferometer differential detection system is proposed, which can measure temperature and strain simultaneously. Through analyzing the theory of the system, the feasibility of the system is proved. It has lots of merits, such as low cost, simple, stable and so on. These merits make it a prospective way to implement simultaneous measurement of temperature and strain.

关 键 词：光纤传感 温度 应变 布里渊散射 

分 类 号：TP212[自动化与计算机技术—检测技术与自动化装置] TN256[自动化与计算机技术—控制科学与工程]