第22卷第1期 2014年1月
文章编号
1004-924X(2014)01-0024-07
光学精密工程
Optics and Precision Engineering
Vol, 22No.1
Jan.2014
埋入式光纤布拉格光栅传感器封装结构
对测量应变的影响昊入军1，郑百林，，贺鹏飞，谭跃刚”
（1.同济大学航空航天与力学学院，上海200092： 2.武汉理工大学机电工程学院，湖北武汉430070）
摘要：考虑在实际应变测量中传感器封装形式会影响光纤Bragg光栅测得的应变响应，本文研究了测量应变与实际应变之间的关系。针对埋人式光纤Brag光栅传感器，建立了应变传递函数，并对传递函数的正确性和各个参数对测量应变的影响进行了研究，首先，根据埋入式光纤Brag光栅传感器的受力特点，提出了多项式形式的剪应力分布，进一步建立了应变传递函数。然后，利用数值方法和实验对该应变传递函数进行验证。最后，分析了传感器长度、胶结层弹性模量、胶结层厚度对测量应变的影响。计算结果表明：该应变传递函数正确；胶结层厚度糖薄，弹性模量越大，越有利于应变传递。该应变传递函数计算误差控制在5%以内，完全满足埋人式光纤Bragg光栅测量精度要求，对其实际应用具有指导意义。
关键调：光纤布拉格光栅；光纤传感署；应交测量；应变传递；剪应力
中图分类号：TN253
文献标识码：A
doi;10.3788/OPE.20142201.0024
Influenceofencapsulationstructuresforembeddedfiber-optic
Bragggratingsensorsonstrainmeasurement WU Ru-jun', ZHENG Bai-lin'', HE Peng-fei', TAN Yue-gang
(l.School of AerospaceEngineering and Applied Mechanics,Tongji University
Shanghai 200092,China;
2.School of Mechanical and Electronic Engineering,Wuhan University of
Technology,Wuhan 430070,China)
+Corresponding author,E-mail :blzheng@tongji.edu.cn
Abstract: As the package structures of a sensor seriously interfere the strain responses measured by a Fiber-optic Bragg Grating(FBG), this paper focuses on the relationship of measured strain and truc strain in the actual measurement, It establishes a strain transfer function for embedded FBG sensors and verifies the validity of the transfer function and the influence of different parameters on the meas-ured strain. Firstly, based on mechanical characteristics of embedded FBG sensors, the shear stress distribution with a form of polynomial is presented, then the strain transfer function is established and verified by taking a numerical method and an experiment. Finally the influence of sensor length, ce
收稿日期：2013-05-20；修订日期：2013-06-26.
基金项目：国家863高技术研究发展计划资助项目（No.2012AA040106）