基于STM32的矿用本安型瞬变电磁仪设计  

Design of mine intrinsically safe transient electromagnetic instrument based on STM32

作　　者：安赛 AN Sai(Safety Branch of China Coal Research Institute,Beijing 100013,China;State Key Laboratory of Coal Mining and Clecm Utilization(China Coal Research Institute),Beijing 100013,China)

机构地区：[1]煤炭科学技术研究院有限公司安全分院,北京100013 [2]煤炭资源高效开采与洁净利用国家重点实验室(煤炭科学研究总院),北京100013

出　　处：《煤矿安全》2021年第5期158-162,共5页Safety in Coal Mines

基　　金：国家自然科学基金资助项目(51704162)。

摘　　要：设计了一款基于STM32的矿用本安型瞬变电磁仪。发射部分通过发射双极性方波抑制工频及其多次谐波干扰;接收部分使用数据叠加、多次迭代实现采集信号的早、中、晚期信号的合成,提高动态范围及信噪比。井下实测表明接收电压由最大43.528 V下降至1.323μV,其接收动态范围>150 d B;与同类设备进行对比测试,结果与现场巷道人文设施以及出水情况相符,能够满足井下巷道超前探测对矿用瞬变电磁仪的要求。A mine-used intrinsically safe transient electromagnetic instrument based on STM32 is designed.The transmitting part suppresses the interference of power frequency and its multiple harmonics by transmitting a bipolar square wave;the receiving part uses data superposition and multiple iterations to realize the synthesis of the early,middle and late signals of the collected signals to improve the dynamic range and signal-to-noise ratio.The underground measurement shows that the receiving voltage drops from the maximum 43.528 V to 1.323μV,and its receiving dynamic range is more than 150 dB;and compared with similar equipment,the results are consistent with the on-site roadway humanities facilities and water output conditions,which can meet the requirements of mine transient electromagnetic instrument for advance detection of underground roadway.

关 键 词：瞬变电磁仪 数据合成 噪声抑制 双极性方波 STM32 

分 类 号：TD679[矿业工程—矿山机电]