对称推挽式光纤光栅振动传感器设计研究

Study on Fiber Bragg Grating Vibrating Sensors with Symmetry Push-pull Configuration

摘要:

为实现对低频振动信号高品质探测,设计了一种新型光纤光栅振动传感器,采用双光栅对称推挽式探头结构,可以有效抑制温度和应力交叉灵敏特性。通过理论仿真分析,表明传感器具有高灵敏度和良好的低频探测性能,经优化设计,灵敏度可达546 pm/g,在0~100 Hz之间,灵敏度动态响应特性良好。

Abstract:

To realize high-precision detection of low-frequency vibrating signals,a novel kind of FBG-based accelerometer is designed with two Bragg gratings symmetry push-pull configuration.The simulated results show that the new sensor possesses high sensitivity and good low-frequency detecting characteristic.After optimizations,the sensitivity of the sensor can reach up to 546 pm/g,and it obtains favourable dynamic response character at 0~100 Hz.