【摘要】 由矿震引发的灾害严重制约着矿产资源合理开发与利用。为实现对矿山动力灾害活动规律的预警,将光纤光栅加速度传感器引入微震监测。基于传统的单维测量手段,设计了一种三维加速度传感器,并通过理论计算得出该系统固有频率为2800.6Hz,工作频率为0~840Hz和3640~4200Hz,灵敏度系数为0.32pm/m/s2。室内试验结果表明该传感器达到了同时测量加速度三分量的目的。采用FFT变换将中心波长变化曲线转化成了频率强度曲线,可以同时测定振动的加速度大小和方向。更多还原

【Abstract】 The rational development and utilization of mineral resources are seriously restricted by the disaster caused by the mining vibration.To realize the pre-warning on the mining dynamic disaster activity regulation,the optical fiber and grating acceleration sensor is introduced into the microseismic monitoring.A3 Dacceleration sensor is designed based on the traditional onedimensional measurements.The theoretical calculation shows that the natural frequency of the system was 2800.6Hz,the operating frequency was 0~840Hz and 3640~4200 Hz,and the sensitivity coefficient was 0.32pm/m/s2.The results of laboratory tests showed that the sensor could measure the three-component acceleration simultaneously.The center wave-length changing curve can be converted to frequency-intensity curve by using FFT transform.In this way,the magnitude and direction of the vibration acceleration can be measured simultaneously.更多还原