High-Frequency Optical Fiber Bragg Grating Accelerometer
High-Frequency Optical Fiber Bragg Grating Accelerometer
复制标题
高频光纤布拉格光栅加速度计
DOI：
10.1109/jsen.2018.2833885
复制
发表时间：
2018-06-15
影响因子：
4.3
通讯作者：
Wu, Heng
中科院分区：
文献类型：
--
作者：
Wang, Xiaofeng;Guo, Yongxing;Wu, Heng
基于光纤布拉格光栅（FBG）的加速度计技术受到了各研究领域的广泛关注。本文研究了一种用于机械设备的高谐振频率光纤光栅加速度传感器。设计了一种特殊的内置两个光纤光栅的钢管质量块弹性结构，用于轴向振动传感。钢管通过烧结固定在传感器的质量块和螺纹管上，并预拉伸作为弹簧元件。然后，一个传感器原型已经制造和充分测试。实验结果表明，该传感器具有3806 Hz的高谐振频率和1200 Hz的宽平坦响应区，与理论值3993 Hz一致。传感器的灵敏度为4.01 pm/g，拟合线性相关系数为0.9997。对传感器进行了工作方向和横向沿着方向的温度变化试验和激振试验，证实了传感器具有良好的抗干扰能力和温度补偿能力。
Fiber Bragg grating (FBG)-based accelerometer technology receives much attention from various research communities. In this paper, we investigated an FBG accelerometer with high resonant frequency for mechanical equipment. A special steel tube-mass block elastic structure with two FBGs embedded has been designed for axial vibration sensing. The steel tube was fixed on the mass block and threaded pipe in the sensor by sintering and pre-stretched to serve as a spring element. Then, a sensor prototype has been manufactured and fully tested. Experimental results show that the sensor provides a high resonant frequency of 3806 Hz with a wide flat response region up to 1200 Hz, which is consistent with the theoretical value of 3993 Hz. The sensitivity of the sensor is 4.01 pm/g with a fitting linear correlation coefficient of 0.9997. Temperature change test and excitation test along the working direction and transverse direction have been carried out, which confirmed excellent anti-interference ability and temperature compensation ability of the sensor.