光纤布拉格光栅传感器应变传递双向耦合分析  

Two-way Coupled Analysis of Strain Transfer of Fiber Bragg Grating Sensor

作　　者：吴入军[1] 张晓峰[1] 郑百林[2] 陈田[1] WU Ru-jun;ZHANG Xiao-feng;ZHENG Bai-lin;CHEN Tian(School of Mechanical Engineering,Shanghai Dianji University,Shanghai 201318,China;School of Aerospace Engineering and Applied Mechanics,Tongji University,Shanghai 200092,China)

机构地区：[1]上海电机学院机械学院,上海201318 [2]同济大学航空航天与力学学院,上海200092

出　　处：《光子学报》2020年第8期58-67,共10页Acta Photonica Sinica

基　　金：国家高技术发展计划(No.2012AA040106);上海市高峰高原学科项目(No.A1-5701-18-007-03);上海市自然科学基金(No.15ZR1417200)。

摘　　要：粘贴于受弯基体表面的光纤布拉格光栅传感器测量应变与基体真实应变之间存在误差,因此研究光纤布拉格光栅传感器的变形机理、分析测量应变与真实应变之间的关系是目前的研究热点.首先研究光纤布拉格光栅传感器与基体之间的相互作用机理,然后,利用有限元解、实验值和理论解进行对比验证,并分析产生误差的原因.最后,通过参数分析研究弹性模量、厚度、粘结长度等参数对光纤布拉格光栅传感器测量效果的影响.结果表明有限元解、实验值和理论解具有相同的变化趋势,有限元解与理论解的误差在2%以内,测量值与理论解的误差在7%以内.平均应变传递率随着基体弹性模量的增大、粘结长度的增长而逐渐增大,随粘结层弹性模量的减小、粘结层厚度的增大而逐渐减小.该理论对应用于受弯基体应变测量的光纤布拉格光栅传感器的设计具有一定的指导意义.There is an error between the measured strain of the fiber Bragg grating sensor bonded on the surface of bending host material and the real strain of the host material.As a result,the issues of the deformation mechanism and the relationship between measured strain and real strain of the fiber Bragg grating sensor received considerable critical attention.First of all,the interaction mechanism between the fiber Bragg grating sensor and the host material was studied.Then,finite element solution,experimental value and theoretical solution were used for comparison and verification.Also,the causes of the errors were analyzed.Finally,the influence of the parameters(e.g.,Young’s modulus,thickness,bonding length)on the measurement effect of fiber Bragg grating sensor was studied.The results reveal that finite element solution,experimental value and theoretical solution exhibit the same variation trend.The error between finite element solution and theoretical solution is controlled within 2%,while the error between experimental value and theoretical solution is controlled within 7%.The average strain transfer rate increase with an increase of both the Young’s modulus of the host material and the bonding length.Opposite conclusion held for the decreasing elastic modulus of the adhesive and increasing thickness of the adhesive.This theory has a certain guiding significance for the design of fiber Bragg grating sensors used for the strain measurement of the bending host material.

关 键 词：光学工程 应变测量 力学分析 光纤布拉格光栅传感器 

分 类 号：TN253[电子电信—物理电子学]