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首页> 外文期刊>IEEE sensors journal >High Sensitivity Fiber Bragg Grating Acceleration Sensor Based on Rigid Hinge
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High Sensitivity Fiber Bragg Grating Acceleration Sensor Based on Rigid Hinge

机译：基于刚性铰链的高灵敏度光纤布拉格光栅加速度传感器

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摘要

In order to break through low sensitivity limitation of the existing fiber Bragg grating (FBG) acceleration sensor, a new high sensitivity FBG acceleration sensor based on rigid hinge is proposed. The working principle innovation is that the sensor uses the rigid body rotation motion instead of the existing elastic deformation. The novel structure is that the pendulum rotates around the rigid hinge and the structure is symmetrically designed, which increases the elongation of the fiber grating by twice. The resonance frequency and sensitivity formula of FBG acceleration sensor is theoretically obtained by analysis. The influence of size parameters of the structure on sensor sensitivity and resonance frequency is further analyzed by MATLAB, and finally the structural parameters are optimized. On the basis, the first-order natural frequency of the sensor is simulated by ANSYS Workbench17.0. Experimental studies show that the natural frequency of the acceleration sensor designed in this paper is 39 Hz, the sensitivity of the sensor is 949.2 pm/g at 15 Hz, and the cross-interference is less than 6.49%, which is suitable for precision measurement under low frequency micro-vibration.
机译：为了通过现有光纤布拉格光栅（FBG）加速度传感器的低灵敏度限制，提出了一种基于刚性铰链的新型高灵敏度FBG加速度传感器。工作原理创新是传感器使用刚体旋转运动而不是现有的弹性变形。新颖的结构是摆在刚性铰链周围旋转，并且结构对称设计，这增加了纤维光栅的伸长率两次。 FBG加速度传感器的共振频率和灵敏度公式通过分析理论地获得。 MATLAB进一步分析了对传感器灵敏度和共振频率的结构尺寸参数的影响，最后进行了结构参数。在此基础上，传感器的一阶固有频率由ANSYS Workbench17.0模拟。实验研究表明，本文设计的加速度传感器的自然频率为39Hz，传感器的灵敏度为949.2 pm / g，15 hz，交叉干扰小于6.49％，适用于精密测量在低频微振动下。

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