光纤布喇格光栅应变传感器结构优化研究  

Structure Optimization of Fiber Bragg Grating Strain Sensors

作　　者：袁子琳[1] 龚元[1] 马耀远[1] 杜磊[1] 吴宇[1] 饶云江[1] 吴慧娟[1] 王浚璞 万夫[2] 

机构地区：[1]电子科技大学光纤传感与通信教育部重点实验室,成都611731 [2]川庆钻探工程有限公司安全环保质量监督检测研究院,四川广汉618300

出　　处：《光子学报》2012年第11期1261-1266,共6页Acta Photonica Sinica

基　　金：国家自然科学基金(No.61107073;No.61107072;No.61106045);中央高校基本科研业务费专项资金(No.ZYGX2011J002);高等学校博士学科点专项科研基金(No.20110185120020);瞬态光学与光子技术国家重点实验室开放基金(No.SKLST201005)资助

摘　　要：提出了一种改进的光纤光栅应变传感器结构,用有限元分析软件对其进行建模和静力仿真,得到其应力分布和光栅区域的应变情况.在整体宽度与厚度相等的情况下,此结构的灵敏度约为传统"工"字型结构的600倍.进一步分析了其关键区域的6个结构参量对应变灵敏度及量程的影响.筛选、设计并加工出不同尺寸的两种应变片,分别用UV胶与玻璃焊料对光栅进行封装,得到灵敏度分别为:249pm/N、330pm/N和1.1pm/N.比较分析表明,本文提供的分析方法与数据,可为不同工程应用场合的最优结构设计提供依据.The dependence of a fiber Bragg grating strain sensor on the improved structure parameters was investigated both numerically and experimentally.The stress distribution and the strain of the grating region was obtained.In the case of the overall width and thickness are equal,the sensitivity of this structure is about 600 times higher than the traditional I-shaped structure.The influence of the 6 key structure parameters on the strain sensitivity and the measurement range was analyzed in detail.Experimental results were also given compared with the numerical simulated results.The gratings were packaged respectively with UV glue and glass solder to get the sensitivities were: 249 pm/N,330 pm/N and 1.1 pm/N.The analysis method and data provided a basis for structural optimum design of fiber Bragg grating strain sensors in different applications.

关 键 词：光纤布喇格光栅 光纤应变传感器 灵敏度 结构优化 

分 类 号：TP212[自动化与计算机技术—检测技术与自动化装置] TB125[自动化与计算机技术—控制科学与工程]