高温光纤EFPI应变传感技术研究及应用  

Study on Fiber EFPI Strain Sensor for High Temperature and Its Application

作　　者：李金洋 毛国培 李龙[2] 宁佳晨 张伟航 史青 LI Jinyang;MAO Guopei;LI Long;NING Jiachen;ZHANG Weihang;SHI Qing(Beijing Institute of Telemetry,Beijing 100076,China;Beijing Aerospace Propulsion Institute,Beijing 100076,China)

机构地区：[1]北京遥测技术研究所,北京100076 [2]北京航天动力研究所,北京100076

出　　处：《载人航天》2021年第5期633-638,共6页Manned Spaceflight

基　　金：载人航天领域预先研究项目(20184112043);民用航天“十三五”第三批预先研究项目(B0104);中国科协青年人才托举工程(2018QNRC001)。

摘　　要：针对航天动力系统的高温极端工况结构应变测量问题,采用光学干涉精密测量技术,基于耐高温镀金光纤,设计了一种耐850℃高温的光纤EFPI应变传感器。通过仿真计算,对应变传递模型进行了分析和研究,提出了传感器灵敏度优化设计方法,并在此基础上完成了样机制备和试验测试。结果表明:该传感器具有良好的应变与温度响应重复性,通过搭载运载火箭发动机试车,获取了试车过程涡轮泵表面的应变信息,表明该传感器已具备工程应用能力。Focusing on the strain measurement of space propulsion system in high temperature,a fi-ber strain sensor for 850℃application was designed using the optical interferometry and the Au-coated fiber.The strain transfer model and the method for sensitivity enhancement were investigated,and the prototype sensor was fabricated.Experimental results showed that the sensor demonstrated good repeatability in strain and temperature response.Furthermore,the sensor was applied in the surface strain measurement of the turbopump in the ground testing of a rocket engine which validated its engineering application ability.

关 键 词：光纤传感器 法布里-珀罗干涉 高温应变测量 运载火箭发动机 

分 类 号：O439[机械工程—光学工程] V44[理学—光学]