瞬变电磁发送机阻尼精确匹配方法  

Research on precise damping matching for transient electromagnetic transmitter

作　　者：鲍明晖 张民明 李波 李军强 周密 付志红[2] BAO Minghui;ZHANG Minming;LI Bo;LI Junqiang;ZHOU Mi;FU Zhihong(Electric Power Research Institute,Chongqing Electric Power Company,Chongqing 401123,China;School of Electrical Engineering,Chongqing University,Chongqing 400044,China;Electric Power Research Institute,Yunnan Power Grid Co.,Ltd.,Kunming 650217,China;Chongqing Triloop Prospecting Technology Co.,Ltd.,Chongqing 402660,China)

机构地区：[1]重庆电力公司电力科学研究院,重庆401123 [2]重庆大学电气工程学院,重庆400044 [3]云南电网有限责任公司电力科学研究院,云南昆明650217 [4]重庆璀陆探测技术有限公司,重庆402660

出　　处：《合肥工业大学学报（自然科学版）》2020年第2期211-215,共5页Journal of Hefei University of Technology：Natural Science

基　　金：国家重点研发计划资助项目(2017YFC0601804);国家自然科学基金资助项目(51777017)

摘　　要：文章针对现有瞬变电磁发送机精确匹配阻尼电阻技术的不足,分析了发射线圈分布参数模型;得到了达到临界阻尼响应时所需阻尼电阻阻值与发射线圈自感、内阻及分布电容的关系式;提出了一种通过瞬变电磁发送机输出端口对不同发射线圈进行阻尼电阻精确匹配与调节的方法;并对该方法进行了实验测试,实验结果显示,采用该方法可以明显改善发射电流关断末期过冲与震荡现象。In view of the deficiencies in precise damping matching for transient electromagnetic transmitter, a method is introduced to precisely match the damping resistance of different transmitting coils via the output port of the transient electromagnetic transmitter. Theoretical analysis of the distributed parameter model of the transmitting coil is described. Equations calculating the critical damping resistance are derived from the self-inductance, internal resistance and the distributed capacitance of the transmitting coil, accordingly. Extensive experiments demonstrate that the proposed method can rectify the overshoot and oscillation phenomenon of the emission current during the late period of the turn-off.

关 键 词：瞬变电磁法(TEM) 发射电流 阻尼系数 多匝线圈 阻尼匹配 

分 类 号：TP23[自动化与计算机技术—检测技术与自动化装置]