三维光纤光栅微震加速度传感器研究
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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。
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.
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.
引文
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[2]和雪松,李世愚,潘科,等.矿山地震与瓦斯突出的相关性及其在震源物理研究中的意义[J].地震学报,2007,29(3):314-327.
[3]董陇军,李夕兵,唐礼忠.影响微震震源定位精度的主要因素分析[J].科技导报,2013,31(24):26-32.
[4]刘晓辉,吴爱祥,王春来,等.云南会泽铅锌矿微震监测系统应用研究[J].金属矿山,2010(1):151-154.
[5]于秀娟,余有龙,张敏,等.光纤光栅传感器在航空航天复合材料/结构健康监测中的应用[J].激光杂志,2006,27(1):1-3.
[6]郭永兴,张东生,周祖德,等.光纤布拉格光栅加速度传感器研究进展[J].激光与光电子学进展,2013(6):5-12.
[7]刘波,牛文成,杨亦飞,等.新型光纤光栅加速度传感器的设计与实现[J].仪器仪表学报,2006,27(1):42-44.
[8]杨光,黄俊斌,顾宏灿,等.光纤Bragg光栅加速度传感器研究进展[J].舰船电子工程,2011,31(7):76-80.
[9]苏小杰,高艳磊.光纤传感技术在黄金矿山中的应用研究[J].矿业研究与开发,2009,29(6):66-68.
[10]徐国权,熊代余.光纤光栅传感技术在工程中的应用[J].中国光学,2013,6(3):306-317.
[11]陆菜平,窦林名,吴兴荣,等.岩体微震监测的频谱分析与信号识别[J].岩土工程学报,2005,27(7):772-775.
[12]曹安业,窦林名,秦玉红,等.高应力区微震监测信号特征分析[J].采矿与安全工程学报,2007,24(2):146-149.
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