Chinese Optics Letters, 2018, 16 (7): 070604, Published Online: Jul. 19, 2018   

Hybrid fiber Bragg grating sensor for vibration and temperature monitoring of a train bearing Download: 620次

Author Affiliations
1 School of Communication, Shenzhen University, Shenzhen 518060, China
2 School of Political Science and Public Management, Wuhan University, Wuhan 430072, China
3 Key Laboratory of Metallurgical Equipment and Control Technology, Ministry of Education, Wuhan University of Science and Technology, Wuhan 430081, China
4 Hubei Key Laboratory of Mechanical Transmission and Manufacturing Engineering, Wuhan University of Science and Technology, Wuhan 430081, China
Abstract
We report a fiber Bragg grating (FBG)-based sensor for the simultaneous measurement of a train bearing’s vibration and temperature. A pre-stretched optical fiber with an FBG and a mass is designed for axial vibration sensing. Another multiplexed FBG is embedded in a selected copper-based alloy with a high thermal expansion to detect temperature. Experiments show that the sensor possesses a high resonant frequency of 970 Hz, an acceleration sensitivity of 27.28 pm/g, and a high temperature sensitivity of 35.165 pm/°C. A resonant excitation test is also carried out that demonstrates the robustness and reliability of the sensor.

Xiaofeng Wang, Yongxing Guo, Li Xiong. Hybrid fiber Bragg grating sensor for vibration and temperature monitoring of a train bearing[J]. Chinese Optics Letters, 2018, 16(7): 070604.

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