摘要
提出一种可用于航天系统温度监测的光纤布拉格光栅(FBG)温度传感器及其封装方式。通过对FBG温度传感器结构进行力学仿真,分析了FBG的预拉伸幅度、低熔点玻璃厚度对传感器稳定性的影响;提出了优化传感器封装性能的方法,并通过实验进行了验证;对封装的FBG传感器进行四次稳定性实验,每次实验相隔二十天。实验结果表明:FBG传感器在各个温度点(-70℃,-60℃,……,30℃)波长的标准差小于0.57pm;FBG传感器温度灵敏度为8.4pm/℃,温度测量标准差小于0.067℃;在液氮环境中,FBG传感器波长的标准差为0.43pm,具有良好的低温稳定性。
In this paper,a fiber Bragg grating （FBG） temperature sensor and its packaging method for monitoring temperature of aerospace systems is presented. The mechanical structure of FBG temperature sensors is analyzed by mechanics simulation. On the basis of mechanics simulation and theoretical analy- sis, the influence of FBG pre-stretchiug amplitude and low melted point glass thickness on the stability of the FBG temperature sensors is discussed. The packaging method of the FBG temperature sensors is op- timized, and the characteristic of FBG temperature sensors is verified through the experiments. Four sta- bility experiments are conclucted for the encapsulated FBG sensor,which are separated by twenty days. The experimental results show that the standard deviation of the FBG sensor wavelength at all tempera- ture points （including --70 ℃,--60 ℃, ……20 ℃ and 30℃） is less than 0. 57 pro,the temperature sen- sitivity is 8. 4 pm/℃, and the standard deviation of temperature measurement is less than 0. 067℃. When the FBG temperature sensor is placed in the liquid nitrogen, the standard deviation of the FBG temperature sensor wavelength is 0. 43 pm in six days. In conclusion, the FBG temperature sensors pos- sess excellent low-temperature stability.
作者
谢仁伟
张学智
王双
江俊峰
刘琨
臧传军
楚奇梁
刘铁根
XIE Ren-wei;ZHANG Xue-zhi;WANG Shuang;JIANG Jun-feng;LIU Kun;ZANG Chuan-jun;CHU Qi-liang;LIU Tie-gen(Optical Fiber Sensing Research Institute,Key Laboratory of Opto-electronic Information Technology, Ministry of Education,College of Precision Instrument and Optoelectronics Engineering, Tianjin University, Tianjin 300072, Chin)
出处
《光电子．激光》
EI
CAS
CSCD
北大核心
2018年第4期363-369,共7页
Journal of Optoelectronics·Laser
基金
国家重大科学仪器设备开发专项(2013YQ030915)、国家自然科学基金(61475114、61378043、61405138、61505139、61227011)资助项目
关键词
光纤布拉格光栅
航天应用
低温传感
稳定性
fiber Bragg grating （FBG）
aerospace application
low-temperature sensing
stability
