论文部分内容阅读
为了适应光纤传感器在采煤机中的应用,提出了一种基于柔性铰链的光纤布拉格光栅(FBG)加速度传感器,其质量块通过柔性铰链和基座连接。基于传感器的结构模型,从理论给出了传感器的灵敏度和谐振频率公式,并讨论了结构参数对传感器灵敏度和谐振频率的影响,还利用有限元法分析了传感器的静态和动态特性。实验表明,本文传感器的谐振频率为2kHz,峰-峰值灵敏度为22pm/g,横向抗干扰度小于10%,适用于1kHz以下加速度的测量。
In order to adapt to the application of optical fiber sensor in shearer, a flexible fiber optic Bragg grating (FBG) accelerometer based on flexible hinge is proposed. Its mass is connected to the base via a flexible hinge. Based on the structural model of the sensor, the sensitivity and resonant frequency formula of the sensor are given theoretically. The influence of structural parameters on the sensitivity and resonant frequency of the sensor is discussed. The static and dynamic characteristics of the sensor are also analyzed by using the finite element method. Experiments show that the sensor resonant frequency of 2kHz, the peak-peak sensitivity of 22 pm / g, horizontal anti-interference less than 10% for acceleration below 1kHz measurement.