矿井瞬变电磁仪的设计  

Design of transient electromagnetic instrument for mining

作　　者：覃海明 QIN Haiming(China Coal Technology and Engineering Group Chongqing Research Institute,Chongqing 400037,China)

机构地区：[1]中煤科工集团重庆研究院有限公司,重庆400039

出　　处：《自动化与仪器仪表》2024年第7期40-42,47,共4页Automation & Instrumentation

基　　金：重庆市自然科学基金:采煤工作面瞬变电磁法透视探测的波场特征与成像方法研究(项目编号:cstc2020jcyj-msxmX0676)。

摘　　要：介绍了新型矿用瞬变电磁仪的设计,发射机在发射一次场关闭期间,发射线圈内部感性负载电量,经快速放电回路极速放电,缩短一次场关断时间,浅层探测盲区缩短;接收机采用双通道采集二次场信号,通过数据拼接处理,信号接收动态范围可达180 db以上。瞬变电磁仪主控器为Linux操作系统的低功耗工控机,通过抽道算法程序处理后,实现视电阻率快速成像。This paper designed a new downhole dynamic imaging transient electromagnetic instrument.During the primary field shutdown period of the transmitter,the inductive load electric quantity inside the transmitting coil is rapidly discharged through the fast discharge circuit,shortening the primary field shutdown time and the shallow detection blind area;The receiver adopts dual channels to collect secondary field signals,and through data splicing processing,the dynamic range of signal reception can reach over 180 db.The main controller of the transient electromagnetic instrument is a low-power micro industrial computer,which is processed by a pumping algorithm program under the Linux operating system to achieve rapid imaging of apparent resistivity.

关 键 词：瞬变电磁仪 快速放电 双通道采集 动态成像 

分 类 号：TP273[自动化与计算机技术—检测技术与自动化装置]