等值反磁通瞬变电磁法天线零磁通面位置的确定方法

doi:10.11720/wtyht.2022.1599

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Abstract

Determining the geometric position of the zero magnetic flux plane is the key to the detection system of the opposing-coils transient electromagnetic method (opposing-coils TEM). Given this, a zeroing method was proposed in this study. First, an opposing-coils transient electromagnetometer was used to continuously send the bipolar square wave of fixed frequency. Then, the receiver collected the time domain signals of the receiving antenna in real time, and the discrete Fourier transform was used to calculate the minimum power spectral density (A1, A2 and A3) at the roughly-, finely-, and micro-tuned receiving antenna positions. When A1>A2>A3, the receiving antenna was in the zero magnetic flux plane. Finally, the test results of transmitting 20 kHz bipolar square wave showed that the transition process of the attenuation signals of the secondary field can be significantly improved under the condition of A1>A2>A3.

Key words： opposing coils TEM zero magnetic flux plane power spectral density

Received: 10 November 2021 Published: 03 January 2023

ZTFLH:

P631

Corresponding Authors: XU Yu E-mail: 249310111@qq.com;xuyu19952020@163.com

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	Qing-Xin QI
	Zhen-Zhu XI
	Yu XU
	Ren MU

Cite this article:

Qing-Xin QI,Zhen-Zhu XI,Yu XU, et al. A method for determining the position of zero magnetic flux plane of antennae using the opposing-coils transient electromagnetic method[J]. Geophysical and Geochemical Exploration, 2022, 46(6): 1540-1544.

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https://www.wutanyuhuatan.com/EN/10.11720/wtyht.2022.1599 OR https://www.wutanyuhuatan.com/EN/Y2022/V46/I6/1540

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