植入式光纤光栅应变传感器的湿度影响  

Humidity influence on embedded fiber Bragg grating strain sensors

作　　者：阚宝玺 杨超[1] 卞贺明[2,3] 唐才杰 黄建业[2,3] 王学锋 孟庆平[4] 孙维 高行素[4] Kan Baoxi;Yang Chao;Bian Heming;Tang Caijie;Huang Jianye;Wang Xuefeng;Meng qingping;Sun Wei;Gao Xingsu(School of Aeronautic Science and Engineering,Beihang University,Beuing 100083,China;Beuing Institute of Aerospace Control Device,Beuing 100094,China;Beijing Optical Fiber Sensing System Engineering Technology Research Center,Beijing 100094,China;China Academy of Space Technology,Beijing 100094,China)

机构地区：[1]北京航空航天大学航空科学与工程学院,北京100083 [2]北京航天控制仪器研究所,北京100094 [3]北京市光纤传感系统工程技术研究中心,北京100094 [4]中国空间技术研究院总体部,北京100094

出　　处：《红外与激光工程》2018年第A01期92-98,共7页Infrared and Laser Engineering

基　　金：国防基础科研计划（JCKY20162038107）

摘　　要：植入复合材料的光纤光栅应变传感器通常涂覆了工作温度高、抗拉强度大的聚酰亚胺。然而，聚酰亚胺涂覆层的体积受湿度影响。采用理论分析、有限元仿真和实验的方法，研究了湿度对植入碳纤维复合材料的光纤光栅应变传感器的影响。优化网格划分以提高仿真精度，湿度变化导致的光纤光栅应变传感器应变变化的仿真值小于4μs。湿度实验进行了10天连续测量，经过温度补偿后，植入复合材料的光纤光栅应变传感器测量值变化小于8μs。分析和实验结果表明，湿度变化对聚酰亚胺涂覆的植入式光纤光栅应变传感器没有显著影响。通过拉伸试验对植入式光纤光栅应变传感器的重复性、线性度等指标进行了测试和分析，结果表明传感器具有良好的重复性和线性度。Fiber Bragg grating strain sensors embedded in composite material are generally coated with polyimide which can operate at high temperature environment with large tensile stress. However, the volume of polyimide coating is influenced by humidity. The humidity influence on fiber Bragg grating strain sensors which were embedded in carbon fiber reinforced composite material was investigated by theoretical analysis, finite element simulation and experimental method. The partition of mesh was optimized to improve the precision of the simulation, and the simulated strain variation of fiber Bragg grating strain sensor caused by relative humidity change was less than 4 i^s. The humidity experiment results were obtained from 10 days continuous tests, and the measured strain variation of fiber Bragg grating strain sensor in carbon composite material was less than 8 I^E with temperature compensation. The simulation and experiment results reveal that the embedded fiber Bragg grating strain sensors coated with polyimide are not significantly influenced by humidity change. The characterizations of embedded fiber Bragg grating strain sensor, including repeatability and linearity were tested and analyzed in tension test. The embedded fiber Bragg grating strain sensors possess good repeatability and linearity.

关 键 词：光纤BRAGG光栅 应变传感器 湿度 复合材料 植入式 

分 类 号：TP212.14[自动化与计算机技术—检测技术与自动化装置] TN253[自动化与计算机技术—控制科学与工程]