基于轴承和柔性铰链的布拉格光纤光栅加速度计  

Fiber bragg grating accelerometer based on flexure hinge and bearing

作　　者：宋颖[1,2] 张浩然 李剑芝 申博豪[3,4] 刘占剑 SONG Ying;ZHANG Hao-ran;LI Jian-zhi;SHEN Bo-hao;LIU Zhan-jian(Key Laboratory of Traffic Safety and Control of Hebei Province,Shijiazhuang Tiedao University,Shijiazhuang 050043,China;School of Traffic and Transportation,Shijiazhuang Tiedao University,Shijiazhuang 050043,China;Structural Health Monitoring and Control Institute,Shijiazhuang Tiedao University,Shijiazhuang 050043,China;School of Mechanical Engineering,Shijiazhuang Tiedao University,Shijiazhuang 050043,China;School of Materials Science and Engineering,Shijiazhuang Tiedao University,Shijiazhuang 050043,China)

机构地区：[1]石家庄铁道大学河北省交通安全与控制重点实验室,河北石家庄050043 [2]石家庄铁道大学交通运输学院,河北石家庄050043 [3]石家庄铁道大学河北省大型结构健康诊断与控制实验室,河北石家庄050043 [4]石家庄铁道大学机械工程学院,河北石家庄050043 [5]石家庄铁道大学材料科学与工程学院,河北石家庄050043

出　　处：《中国光学（中英文）》2023年第5期1109-1120,共12页Chinese Optics

基　　金：国家重点研发计划(No.2021YFB2601000);中央引导地方科技发展基金(No.226Z0801G,No.216Z3901G)。

摘　　要：为实现中高频振动信号的测量,本文设计了一种基于轴承和柔性铰链结构的光纤布拉格光栅加速度传感器。首先,基于理论力学模型推导出其固有频率、灵敏度与结构参数的数学模型,然后进行结构优化设计,并制作了传感器实物。在此基础上,对所设计传感器动态特性进行有限元仿真和实验测试。研究结果表明:传感器工作频率为10~1200 Hz,加速度灵敏度达17.25 pm/g,测量误差小于0.3 g,线性度大于0.99,重复性误差为2.33%,且能实现温度补偿。We develop a fiber Bragg grating accelerometer based on a bearing and flexure hinge for the measurement of medium-high frequency vibration signals.The mathematical model between its natural frequency and sensitivity and structural parameters is derived based on a mechanical model,and the structural design is optimized based on the theoretical analysis results.With these prerequisites,the sensor was fabricated.Ultimately,its dynamic characteristics are validated using a finite element simulation and vibration experiment.The results show that both its operating frequency range and acceleration sensitivity are 10−1200 Hz and 17.25 pm/g.In addition,this proposed sensor has some advantages such as an error of less than 0.3 g,a good linearity of greater than 0.99,a repeatability error of 2.33%,and it is free of temperature.

关 键 词：传感器 加速度传感器 光纤布拉格光栅 中高频 轴承 柔性铰链 

分 类 号：TN253[电子电信—物理电子学]