一种全光纤Fabry-Perot型高温应变传感器  

A Fiber Fabry-Perot Type High Temperature Strain Sensor

作　　者：李春辉 宋志强 张博 杨淑辉 武万祥 LI Chunhui;SONG Zhiqiang;ZHANG Bo;YANG Shuhui;WU Wangxiang(Beijing Electro-mechanical Engineering Institute,Beijing 100074,China;Beijing Institute of Metrology and Testing,Beijing 100074,China;Beijing Institute of Control and Electronic Technology,Beijing 100038,China)

机构地区：[1]北京机电工程研究所,北京100074 [2]北京振兴计量测试研究所,北京100074 [3]北京控制与电子技术研究所,北京100038

出　　处：《强度与环境》2024年第3期60-64,共5页Structure & Environment Engineering

摘　　要：本文研制了一种全光纤Fabry-Perot型高温应变传感器,将两根制备好的单模光纤穿入空芯光纤构成非本征Fabry-Perot干涉仪(EFPI),使用白光干涉解调仪测量EFPI腔长,通过求解EFPI腔长相对测点距离的变化得到被测件应变。通过开展等强度梁和高温力学试验机试验验证,该传感器在常温下的应变测量准确度优于3%,耐高温能力不低于1100℃,可满足我国航天飞行器研制、试验、生产和应用等各阶段高温应变测量需求。A high temperature all-fiber Fabry-Perot strain sensor was developed.Two prepared single-mode optical fibers wereinserted into the hollow-core fiber to develop a non-intrinsic Fabry-Perot interferometer(EFPI).The cavity length of EFPI was measured by white light interferometry demodulator.And the strain was obtained by solving thederivativeof the cavity length The test results fromequal strength beam and C/SiC specimen showed that the strain measurement accuracy of the sensor at romm temperature was better than 3%,and strain could be obtained at least under 1100℃ high temperature.The sensor can meet the requirements of high temperature strain measurement for China’s space vehicleduring the development,testing,production and application of.

关 键 词：高温传感 光纤传感器 应变传感器 光纤白光干涉测量技术 

分 类 号：TP212[自动化与计算机技术—检测技术与自动化装置]