基于分布式反馈DFB激光器的窄线宽特性及可调谐特性,设计了自温度补偿的光纤Bragg光栅(FBG)加速度检测系统。采用简支梁结构,设计了FBG低频加速度传感器。通过增加温度补偿光路,对DFB激光器的中心波长进行实时反馈控制,实现了系统对温度影响的自补偿。实验结果表明,系统对冲击激励信号和加速度的连续激励信号均有良好的动态响应,系统的固有频率为25.1Hz,频率响应范围为0~400.0Hz,加速度的最大灵敏度约为1.89V/m·s2,并且系统具有良好的温度稳定性。 Based on the narrow bandwidth characteristics and tunable characteristics of distributed feedback DFB lasers, a fiber Bragg grating (FBG) acceleration detection system based on temperature compensation is designed. Using simple beam structure, designed FBG low-frequency acceleration sensor. By increasing the temperature compensation optical path, the DFB laser center wavelength real-time feedback control, to achieve the system of temperature self-compensation. The experimental results show that the system has a good dynamic response to the continuous excitation signal of shock excitation and acceleration. The natural frequency of the system is 25.1Hz, the frequency response range is 0 ~ 400.0Hz, and the maximum sensitivity of acceleration is about 1.89V / m · s2, and the system has good temperature stability.