摘要
针对频率域激电应用中的电磁耦合问题,提出了一种矩形波经低通滤波后放大输出并对大地供电的发送端去耦方法;建立了数学物理模型,通过调节低通滤波时间常数进行的仿真实验结果表明,本方法可以显著衰减接收回路耦合尖峰幅值,且时间常数越大耦合尖峰幅值越小,大于10 ms后衰减量增长缓慢.进一步以5 m收发距为例的仿真结果表明,本方法去耦效果良好,对压制频率域激电法应用中的电磁耦效应或设计抗耦激电观测装置均具有指导意义.
In order to solve the problem of electromagnetic coupling in the frequency domain IP application,this paper proposes a directly decoupling method from transmitter,whose implementation ways is to directly output the rectangular wave current after low-pass processing through power amplification.The mathematical physical model of electromagnetic coupling were established.The simulation experiments results by adjusting the time constant of low-pass filter show that:(1)the low-pass filtered rectangular wave output current can significantly attenuate the amplitude of the coupling peak of the receiving loop.(2)the amplitude of coupling spike decrease with time constant increases,and the attenuation increases slowly after 10 ms.Further simulation results taking the 5 m transmission and reception distance as an example show that the decoupling effect of this method is good.It is of guiding significance for suppressing the electromagnetic coupling effect in the application of frequency domain IP method,or designing anti-coupling IP observation device.
作者
钟湘琴
付国红
程辉
崔峻卿
傅崧原
ZHONG XiangQin;FU GuoHong;CHENG Hui;CUI JunQing;FU SongYuan(Engineering Research Center of Advanced Mining Equipment,Ministry of Education,Hunan University of Science and Technology,Xiangtan 411201,China;Guangxi Key Laboratory of Exploration For Hidden Metallic Ore Deposits,Guilin University of Technology,Guilin 541006,China)
出处
《地球物理学进展》
CSCD
北大核心
2021年第2期848-854,共7页
Progress in Geophysics
基金
国家自然科学基金(42074219,41674075)
国家重点研发计划项目(2018YFC0603900)
广西隐伏金属矿产勘查重点实验室(1207120K01)
湖南省研究生科研创新项目(CX2018B663)联合资助.
关键词
电磁耦合
发送端去耦
时间常数
建模仿真
Electromagnetic coupling
Decoupling from transmitter
Time constant
Modeling and simulation
