摘要
提出了一种用圆形弹膜片和微弯调制机构进行应力传感,用光时域反射探测(OTDR)技术进行测量的分布式光纤应力传感方法。全面阐述了单模光纤微弯应力传感原理及应力传感器的动态范围与分布个数的关系。提出了一种不需要双光路信号就减小了光源波动及环境因素对测量的影响的解调应力方法。建立起了对岩体推力进行监测的试验系统,野外试验表明该传感器具有高灵敏度、高空间分辨率、工程实用性好的特点。
A sort of strain sensor that is made of cycloidal stretch film piece and microbent modulation construction and a method of distributed optical fiber strain sensor by Optical Time-Domain Reflectometer (OTDR) are brought forward. It roundly expatiated theory of microbent single-mode optical fiber's strain sensor and connections of dynamic range and distributing magnitude of strain sensor. A demodulating strain method that avoids light source's fluctuation and environmental factors is put forward. Measure system of rock body thrust is built and field test shows that optical fiber strain sensor has characteristic of high sensitivity and space resolution and finer practicability,
出处
《光电工程》
EI
CAS
CSCD
北大核心
2006年第7期52-56,共5页
Opto-Electronic Engineering
基金
中国地质科学院合作项目
关键词
光纤传感器
应变传感器
光时域反射计
分布式
Optical fiber sensor
Strain sensor
Optical time-domain reflectometer
Distributed
作者简介
张利勋(1968-),男(汉族),四川犍为人.讲师.博士研究生,主要从事光电传感与光信息处理研究。E-mail:zlx@uestc.edu.cn.