光纤高温应变测量准确性评价研究  

Research on Accuracy Evaluation of High Temperature Fiber OpticalStrain Sensor

作　　者：王则力[1] 孝春成[1] 王晓晖[1] WANG Zeli;XIAO Chuncheng;WANG Xiaohui(Beijing Institute of Structure and Environment Engineering,Beijing 100076,China)

机构地区：[1]北京强度环境研究所,北京100076

出　　处：《强度与环境》2023年第5期60-64,共5页Structure & Environment Engineering

基　　金：国家自然科学联合基金项目(U20B2002)。

摘　　要：本文提出了一种用以评价光纤法布里-珀罗干涉仪结构高温应变传感器测量准确性的试验方法。在提出的试验方法中,光纤高温应变传感器及其所安装的复合材料结构处于高温环境,产生基准应变的千分尺滑台处于常温环境。该方法实现了常温下基准应变量与高温下光纤测量应变的空间分隔和线性传递。对光纤高温应变传感器在常温至最高1100℃下的应变灵敏度系数和应变测量准确性进行了分析。试验结果表明,基准应变为6315με时的平均相对误差为1.773%,为复合材料结构高温应变测量准确性以及进一步工程应用提供了依据。In this paper,an experiment method to evaluate the accuracy of high temperature fiber optical strain sensor based on Fabry-Perot interferometry is presented.In this experiment method,fiber optical sensor and composite material structure are under high temperature circumstance,and the instruments to set benchmark strain value are under room temperature circumstance.A spatial partition of high temperature part and room temperature part of the experiment system is achieved and a linear transfer of the strain between the two parts is guaranteed at the same time.Experiments are conducted by the experimental system presented in this paper at room temperature and up to 1100℃.The strain factor and accuracy of fiber optical strain sensor are analyzed.Results show that the mean relative error between the value obtained by fiber optical strain sensor and benchmark strain value is 1.773%where the benchmark strain value is 6315με.The experiment method provides the basis of application of high temperature fiber optical strain sensor in engineering.

关 键 词：高温应变 光纤传感 准确性评价 复材结构 

分 类 号：V414.8[航空宇航科学与技术—航空宇航推进理论与工程] V416.8