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.
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)
出处
《煤矿安全》
CAS
北大核心
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)。
关键词
瞬变电磁仪
数据合成
噪声抑制
双极性方波
STM32
transient electromagnetic instrument
data synthesis
noise suppression
bipolar square wave
STM32