双金属
光纤布拉格光栅
双金属片
材料科学
灵敏度(控制系统)
线性
温度测量
光纤传感器
光纤
光电子学
纤维
光学
电子工程
复合材料
工程类
物理
冶金
波长
量子力学
金属
作者
Zhongchao Qiu,Kai Su,X. Wang,Yuntian Teng
摘要
Temperature is one of the most important physical quantities in the field of earthquake precursor observation. Aiming at the problem of low sensitivity in the Fiber Bragg Grating (FBG) temperature sensor, the sensitized FBG temperature sensor based on bimetal three-substrates is proposed. Through theoretical analysis of the bimetallic model, the structural parameters of the sensor are optimized, and the sensor is simulated and analyzed with ANSYS. Then, the sensor is developed according to the simulation results, and the temperature test system is built to test the performance of the sensor. The results show that the sensitivity of the temperature sensor is 49.3 pm/°C, which is about 4.9 times that of the bare FBG sensor, and the linearity is over 0.999. The research results provide a reference for developing the same type of sensors and further improving the sensitivity of FBG temperature sensors.
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