Design and experimental research on cantilever accelerometer based on fiber Bragg grating

作者：Xiang, Longhai; Jiang, Qi^*; Li, Yibin; Song, Rui

来源：Optical Engineering, 2016, 55(6): 066113.

DOI：10.1117/1.OE.55.6.066113

• fiber Bragg grating
• accelerometer
• cantilever
• vibration

Currently, an acceleration sensor based on fiber Bragg grating (FBG) has been widely used. A cantilever FBG accelerometer is designed. The simulation of this structure was implemented by finite element software (ANSYS) to analyze its sensing performance parameters. And then the optimized structure was produced and calibration experiments were conducted. On the basis of simulation, optical fiber is embedded in the inner tank of the vibrating mass, and Bragg grating is suspended above the cantilever structure, which can effectively avoid the phenomenon of center wavelength chirp or broadening, and greatly improve the sensitivity of the sensor. The experimental results show that the FBG accelerometer exhibits a sensitivity of 75 pm/(m/s(2)) (100 Hz) and dynamic range of 60 dB. Its linearity error is <2.31% and repeatability error is <2.76%. And the resonant frequency is similar to 125 Hz. The simulation results match the experimental results to demonstrate the good performance of FBG accelerometer, which is expected to be used in the actual project.

• 出版日期2016-6
• 单位山东大学