非栅区封装光纤布喇格光栅应变传感特性研究  

Strain Sensing Properties of Grating Ends Packaged FBG Sensors

作　　者：吴俊[1,2] 陈伟民[2] 余葵[1] 马希钦[1] 舒岳阶[1] 

机构地区：[1]重庆交通大学西南水运工程科学研究所,重庆400016 [2]重庆大学光电技术及系统教育部重点实验室,重庆400030

出　　处：《光子学报》2016年第2期79-83,共5页Acta Photonica Sinica

基　　金：国家自然科学基金项目(No.51508059);重庆市基础与前沿研究计划项目(No.CSTC2014JCYJA70006);重庆市教委科学技术研究项目(No.KJ1500514)资助~~

摘　　要：针对表面粘贴式非栅区封装结构,依据变形等效原理,推导了该结构的应变传递函数,仿真分析了非栅区封装中间段长度与封装材料弹性模量对应变传递效率的影响.分别采用有机环氧胶与金属锌,将两只光纤布喇格光栅用非栅区封装方式固定在同一根钢丝上,进行拉伸试验,试验结果表明:两种材料的拉伸曲线线性度均达到0.99以上,表明两种封装材料的应变传递一致性较好;金属锌封装结构的应力感知灵敏度平均值为0.142 6nm/KN,环氧有机胶封装结构的应力感知灵敏度平均值为0.130 4nm/KN;各种应变值下,金属锌封装结构的应变传递系数均稳定在0.995左右,而环氧有机胶封装结构的应变传递系数在0.91左右上下波动,金属锌的应变传递效率较有机环氧胶高了近9.34%.试验结果与数值仿真结果较为吻合,可为非栅区封装光纤布喇格光栅传感器的设计提供依据.According to the grating ends packaged struture,based on the principle of equivalence deformation,the strain transfer function was deduced,the change tendency of strain transfer efficiency with length and bond layer elastic modulus was simulated.Two FBGs were fixed to steel wire of？7mm with epoxy and Zn,and the tensile tests were carried out,the test results showed：The linearity of tensile curves of two packaging type are above 0.99.The average strain sensing sensitivity of epoxy is 0.130 4nm/KN,while the average strain sensing sensitivity of Zn was 0.142 6nm/KN.Under various strain values,the strain transfer efficiency of epoxy is about 0.91,while the Strain transfer efficiency of Zn is about 0.995,the latter is nearly 9.34% more than the former.The test results are in accord well with numerical simulation results.

关 键 词：光纤传感 光纤布喇格光栅 表面粘贴式 非栅区封装 栅区封装 弹性模量 应变传递效率 

分 类 号：TN929.11[电子电信—通信与信息系统]