Fiber Bragg grating accelerometer based on rotating beam for low-frequency vibration

被引：0
|
作者：
Li J. [1 ]
Shen B. [2 ]
Zhang W. [2 ]
Sun B. [1 ]
机构：
[1] Key Laboratory of Structure Health Monitoring and Control, Shijiazhuang Tiedao University, Shijiazhuang
[2] School of Mechanical Engineering, Shijiazhuang Tiedao University, Shijiazhuang
来源：
Yi Qi Yi Biao Xue Bao/Chinese Journal of Scientific Instrument | 2021年 / 42卷 / 12期
关键词：
Accelerometer; Bearing sensors; Fiber Bragg grating; High sensitivity; Low frequency; Rotating beam; Vibration measurement;
D O I：
10.19650/j.cnki.cjsi.J2108473
中图分类号：
学科分类号：
摘要：
A fiber Bragg grating accelerometer based on the rotating beam is designed to attain high accelerated sensitivity in low-frequency vibration. By analyzing its vibration model and MATLAB numerical calculation, the optimized structural parameters of the sensor are achieved. Its theoretical sensitivity and natural frequency are 1 725 pm/g and 68.4 Hz, respectively. Meanwhile, its sensitivity response characteristics are simulated by COMSOL, and the simulation results are closely consistent with the theoretical analysis. Experimental results of frequency response and amplitude characteristics indicate that when the acceleration changes from 0~2 g and working frequency in a range from 0.5~20 Hz, their central wavelength of FBGs is linearly related to the vibration acceleration. In addition, a high sensitivity up to 1 495.2 pm/g and a good repeatability is achieved. The sensor has a simple and compact structure, in which the elastic energy consumption is decreased by bearing during the vibration of the cantilever beam. Therefore, its sensitivity is significantly improved. And the low-frequency vibration signals are detectable. © 2021, Science Press. All right reserved.
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页码：74 / 82
页数：8
相关论文
共 18 条
  • [1] GAGLIARDI G, SALZA M, FERRARO P, Et al., Design and test of a laser-based optical-fiber Bragg-grating accelerometer for seismic applications, Measurement Science & Technology, 19, 8, (2008)
  • [2] DI S R., Fibre optic sensors for structural health monitoring of aircraft composite structures: Recent advances and applications, Sensors (Basel, Switzerland), 15, 8, pp. 18666-18713, (2015)
  • [3] DENG CH J, CHEN D Y, ZHANG H, Et al., Research on wireless vibration measurement redundancy filter arithmetic for equipment of NPPs, Journal of Electronic Measurement and Instrumentation, 27, 5, pp. 429-435, (2013)
  • [4] GUO Y X, ZHANG D SH, LI J Y, Et al., Two dimensional fiber Bragg grating accelerometer, Chinese Journal of Lasers, 39, 12, pp. 198-204, (2012)
  • [5] WANG C, LU Q, CHENG L., Novel type of temperature self-compensating acceleration transducer based on OFBG, IEEE Sensors Journal, 13, 8, pp. 3012-3013, (2013)
  • [6] YE T, LIANG D K, ZENG J, Et al., Study on optical fiber grating vibration sensor based on bow beam sensitive characteristic, Chinese Journal of Scientific Instrument, 33, 1, pp. 139-145, (2012)
  • [7] HE K, ZENG J, LIN Q H, Et al., Research on spatial deployable structure deformation and vibration monitoring with distributed optical fiber, Chinese Journal of Scientific Instrument, 39, 2, pp. 56-65, (2018)
  • [8] LIU Q, JIA Z, FU H, Et al., Double cantilever beams accelerometer using short fiber Bragg grating for eliminating chirp, IEEE Sensors Journal, 16, 17, pp. 6611-6616, (2016)
  • [9] WANG J, HU B, LI W, Et al., Design and application of fiber Bragg grating (FBG) geophone for higher sensitivity and wider frequency range, Measurement, 79, pp. 228-235, (2016)
  • [10] WANG Y, DAI Y T, LIU W M, Et al., Optimization design of fiber bragg grating two-dimensional accelerometer based on flexure hinge, Acta Photonica Sinica, 48, 8, pp. 82-88, (2019)
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