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基于光时域反射法的分布式光纤应力传感器
引用本文:刘长华,徐亚军.基于光时域反射法的分布式光纤应力传感器[J].仪表技术与传感器,2005(6):3-5.
作者姓名:刘长华  徐亚军
作者单位:中国民航飞行学院科研处,四川,广汉,618307
摘    要:研究了光纤时域反射仪的基本原理和光纤的微弯损耗机理,在此基础上开发了一种用光时域反射仪(OTDR)进行探测的分布式光纤应力传感器。对光纤微弯调制机构和传感器系统进行了设计与实验,分析了系统的灵敏度和空间分辨率的影响因素,实现了空间分辨率3m,测量范围1km的测量精度。现场实验表明:对山体滑坡等事故的发生能实现及时准确的灾害预报。

关 键 词:应力  光纤微弯  光时域反射仪  分布式光纤传感器
文章编号:1002-1841(2005)06-0003-03
修稿时间:2004年7月28日

Distributed Fiber Stress Sensor Based on Optical Time-domain Reflectometry
LIU Chang-hua,XU Ya-jun.Distributed Fiber Stress Sensor Based on Optical Time-domain Reflectometry[J].Instrument Technique and Sensor,2005(6):3-5.
Authors:LIU Chang-hua  XU Ya-jun
Abstract:The principle of the optical time-domain reflectometry(OTDR)and the principle of microbend losses of fiber were studied,based on those principles a distributed fiber stress sensor detected by OTDR was designed.The structure of microbended fiber modulation and the system of sensor were designed and tested.The influence factors of system's sensitivity and spacial resolution were also analyzed.The conclusions were drawn as follows:the spacial resolution is rich to 3 m and the range of stress measuring is 1 km.It has been proved by experiments:enables to provide the forecast of disasters such as landslips precisely and in time.
Keywords:Stress  Fiber Microbend  OTDR  Distributed Fiber Sensor
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