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546pm/g，在0~100Hz之间，灵敏度动态响应特性良好。

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 546pm/g, and it obtains favourable dynamic response character at 0~100Hz.