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Optical Engineering

Design and experimental research on cantilever accelerometer based on fiber Bragg grating
Author(s): Longhai Xiang; Qi Jiang; Yibin Li; Rui Song
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Paper Abstract

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/s2) (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 ∼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.

Paper Details

Date Published: 20 June 2016
PDF: 6 pages
Opt. Eng. 55(6) 066113 doi: 10.1117/1.OE.55.6.066113
Published in: Optical Engineering Volume 55, Issue 6
Show Author Affiliations
Longhai Xiang, Shandong Univ. (China)
Qi Jiang, Shandong Univ. (China)
Yibin Li, Shandong Univ. (China)
Rui Song, Shandong Univ. (China)

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