Design and test of the parallel ultra-small transmitter loop used in the transient electromagnetic method

WU Bei-Chen; PAN Yang-Run-Yi; CHENG Jiu-Long; WANG Hui; YAO Di; PANG Xiao-Yin

doi:10.11720/wtyht.2022.1424

2022 Vol. 46, No. 4

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Article navigation > Geophysical and Geochemical Exploration > 2022 > 46(4): 934-939

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WU Bei-Chen, PAN Yang-Run-Yi, CHENG Jiu-Long, WANG Hui, YAO Di, PANG Xiao-Yin. 2022. Design and test of the parallel ultra-small transmitter loop used in the transient electromagnetic method. Geophysical and Geochemical Exploration, 46(4): 934-939. doi: 10.11720/wtyht.2022.1424

Citation:

WU Bei-Chen, PAN Yang-Run-Yi, CHENG Jiu-Long, WANG Hui, YAO Di, PANG Xiao-Yin. 2022. Design and test of the parallel ultra-small transmitter loop used in the transient electromagnetic method. Geophysical and Geochemical Exploration, 46(4): 934-939. doi: 10.11720/wtyht.2022.1424

Design and test of the parallel ultra-small transmitter loop used in the transient electromagnetic method

School of Geosciences & Surveying Engineering, Chinese University of Mining and Technology (Beijing), Beijing 100083, China

Received Date: 05 August 2021

Revised Date: 20 August 2022

Publish Date: 17 August 2022

Abstract

Abstract

In the shallow or mine prospecting using the transient electromagnetic method (TEM), the transmitting magnetic moment is limited by the limited supply voltage of the transmitting system, and the stray inductance of the transmitter loop causes a long turn-off time. To solve these problems, this study designed a parallel transmitter loop of ultra-small coils used in TEM. Using these coils, the transmitting magnetic moment can be increased by the parallel connection of the coils, and the turn-off time can be reduced by additional resistance. The equivalent circuit models of the conventional transmitter coils and the parallel transmitter coils were established and analyzed theoretically. Moreover, the comparative test between the parallel transmitter coils and the conventional transmitter coils were carried out. The results show that the parallel transmitter coils can effectively increase the magnetic moment and reduce the turn-off time. Therefore, this design is greatly significant for reducing the blind area and increasing the prospecting depth in shallow or mine prospecting using TEM.
- TEM /
- parallel transmitter loop /
- turn-off time /
- transmitting magnetic moment /
- ultra-small coil

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References

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