光纤传感器实现天线调整索应变测试的研究  

Study on the Strain Measurement of Adjustable Cable of Large Antenna by Fiber Optic Sensors

作　　者：王庆敏[1] 杨要恩[2] 刘明治[2] 王娟[2] 

机构地区：[1]石家庄铁道学院,石家庄050043 [2]西安电子科技大学,西安710071

出　　处：《中国机械工程》2007年第23期2874-2877,共4页China Mechanical Engineering

基　　金：国家自然科学基金资助项目(59775052);陕西省自然科学研究计划项目

摘　　要：分析了光纤珐珀应变传感器在传感过程中所受到的外界应力引起的应变与传感器自身的结构参数(腔长和标距)以及由于腔长的变化导致导波光程改变量之间的函数关系,在结构参数一定(原始腔长和标距)的情况下,通过监测导波光程的改变量即可得知基体的应变。在此理论分析的基础上,将光纤珐珀应变传感器应用于大型可展开天线纵向调整索的应变测试中,并采用电阻应变片(其很难应用到条件非常恶劣的太空环境中)试验进行对比,结果表明,二者的监测数据基本吻合。从而表明,给出的函数关系正确,为太空应变测量提供了新的方法。The function relationship among strains aroused by outer stress, structure parameters （cavity length and gauge） and light wave change caused by the change of cavity of fiber optic Fabry-- Perot （F--P） strain sensor was analyzed. The strain of body can be gained by monitoring the change of transmitting distance of light wave on condition that the structure parameters （initial cavity and gauge） were kept certain. Based on this theory, fiber optic Fabry--Perot （F--P） strain sensor can be applied to the strain measurement of vertical adjustable cable of large deployable antenna. An experiment was carried out to prove this theory comparing fiber optic F--P sensors with resistance strain gauge. Both of the results are almost identical, while the resistance strain gauge can not be applied to the space environment,and a new method to measure space strain is provided.

关 键 词：光纤珐珀传感器 应变 大型天线 调整索 

分 类 号：O327[理学—一般力学与力学基础]