小回线瞬变电磁探测线圈的耦合影响因素分析  

Analysis of Influence Factors on Coupling of Small-loop Transient Electromagnetic Detection Coil

作　　者：万玲[1,2] 高升 林小雪[1] 王华梁 WAN Ling;GAO Sheng;LIN Xiaoxue;WANG Hualiang(College of Instrumentation&Electrical Engineering,Jilin University,Changchun 130026,China;Key Laboratory of Geophysical Exploration Equipment Ministry of Education of China(Jilin University),Jilin University,Changchun 130026,China)

机构地区：[1]吉林大学仪器科学与电气工程学院,长春130026 [2]吉林大学地球信息探测仪器教育部重点实验室,长春130026

出　　处：《实验室研究与探索》2023年第5期84-87,148,共5页Research and Exploration In Laboratory

基　　金：吉林省教育厅科学技术研究项目(JJKH20211110KJ)。

摘　　要：为减小浅层探测盲区,研究了小回线瞬变电磁探测线圈的主要参数对发射、探测线圈之间的耦合效果和自感的影响规律。构建了不同的探测线圈模型,对导线半径、绝缘层厚度、线圈半径、匝数、相对位置等关键参数进行扫描,获取了参数变化时互感和自感的情况。通过对仿真数据的分析,发现增加导线半径和绝缘层厚度可以在几乎不影响互感的同时有效降低自感,线圈半径、匝数的增大则会使自感、互感急剧上升;将发射线圈和探测线圈调整至合适的相对位置可以使互感趋近于零。该研究可为设计低自感线圈、实现弱耦合提供技术参考。In order to study the influence of the main parameters of small-loop transient electromagnetic detection coil on the coupling effect and self-induction between the launch and detection coils,we build coil models with different parameters,scan key parameters such as wire radius,insulation layer thickness,coil radius,turns and relative position to obtain the mutual inductance and self-inductance under different conditions.Through the analysis of simulation data,we find that increasing the radius of the conductor and the thickness of the insulation layer can effectively reduce the self-inductance without affecting the mutual inductance,the increase of coil radius and turns cause sharp rise of self-inductance and mutual inductance.The mutual inductance can approach zero by adjusting the transmitting coil and the detecting coil to appropriate relative positions.The research can provide technical basis for designing low self-inductance coil and realizing weak coupling.

关 键 词：瞬变电磁 线圈自感 线圈互感 耦合分析 

分 类 号：TH762[机械工程—仪器科学与技术]