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设计了一种竖直式封装结构的分布反馈式(DFB)光纤激光加速度传感器,建立了加速度灵敏度与质量块尺寸参数的理论模型。基于有限元软件,对该加速度传感器的频率响应性能进行了仿真分析,加工制作了传感器原型样品并进行了实验研究。实验结果表明,研制的DFB光纤激光加速度传感器在10~4000Hz频率范围内的平均加速度灵敏度为-119.1dB,且谐振峰值出现在5000Hz附近,与理论和仿真分析结果吻合较好。光纤激光加速度传感器的工作频带在高频方向得到了有效扩宽,能更好地满足DFB光纤激光加速度传感器在高频领域的工程化应用需求。
A DFB optical fiber laser acceleration sensor with vertical package structure was designed and a theoretical model of acceleration sensitivity and mass size parameters was established. Based on the finite element software, the frequency response performance of the accelerometer was simulated and analyzed. Prototype samples of the sensor were fabricated and tested. Experimental results show that the average acceleration sensitivity of DFB fiber laser acceleration sensor in the frequency range from 10 to 4000 Hz is -119.1 dB and the resonance peak appears at around 5000 Hz, which is in good agreement with the theoretical and simulation results. The working frequency band of the fiber laser acceleration sensor is effectively broadened in the high frequency direction to better meet the engineering application requirements of the DFB fiber laser acceleration sensor in the high frequency field.