便携式等值反磁通瞬变电磁系统及试验应用

doi:10.11720/wtyht.2024.0169

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摘要

为改善浅层工程勘查中小回线瞬变电磁系统存在的设备质量过大、收发互感严重及人力需求高等问题,本研究基于等值反磁通瞬变电磁原理,计算了广义等值反磁通天线装置的磁场分布,设计制作了高效、便携天线并配套了相应系统。后续野外试验表明,该便携式等值反磁通瞬变电磁系统在确保勘探精度的同时,有效削弱了收发天线互感现象,显著减轻了人力需求,提高了勘查效率,初步验证了系统的可行性,为小型化浅层勘查设备的发展提供了新的技术路线。

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	周胜
	陈兴朋
	王俊
	亓庆新
	张志清
	潘纪敏
	席振铢
	羊春华

关键词 ：瞬变电磁, 等值反磁通瞬变电磁装置, 便携式天线

Abstract：

In shallow engineering investigations, the small-loop transient electromagnetic (TEM) system is challenged by limitations such as overweight equipment, significant transmitter-receiver mutual inductance, and high manpower requirements. Hence, this study introduced an improved system. Based on the opposing-coils transient electromagnetic (OCTEM) theory, this study calculated the magnetic field distribution of the generalized opposing-coils antenna device. Furthermore, it designed and developed efficient portable antennas and the supporting system (collectively referred to as the portable OCTEM system). Subsequent field experiments demonstrate that while ensuring exploration accuracy, the portable OCTEM system can enhance the investigation efficiency by effectively mitigating the transmitter-receiver mutual inductance and significantly reducing manpower requirements. This study preliminarily verifies the feasibility of the portable OCTEM system, providing a novel technology route for developing downsized shallow exploration equipment.

Key words： transient electromagnetic (TEM) system opposing-coils transient electromagnetic (OCTEM) device portable antenna

收稿日期: 2024-04-15 修回日期: 2024-07-12 出版日期: 2024-12-20

ZTFLH:

P631

基金资助:中国电建基础研究项目(DJ-HXGG-2023-16);湖南省地质院青年骨干项目(HNGSTP202448)

通讯作者: 陈兴朋(1986-),男,2012年硕士毕业于中南大学,从事电磁法仪器的开发与应用研究工作。Email: bantianfeng@foxmail.com

引用本文:

周胜, 陈兴朋, 王俊, 亓庆新, 张志清, 潘纪敏, 席振铢, 羊春华. 便携式等值反磁通瞬变电磁系统及试验应用[J]. 物探与化探, 2024, 48(6): 1479-1485.
ZHOU Sheng, CHEN Xing-Peng, WANG Jun, QI Qing-Xin, ZHANG Zhi-Qing, PAN Ji-Min, XI Zhen-Zhu, YANG Chun-Hua. Portable opposing-coils transient electromagnetic system and its application tests. Geophysical and Geochemical Exploration, 2024, 48(6): 1479-1485.

链接本文:

https://www.wutanyuhuatan.com/CN/10.11720/wtyht.2024.0169 或 https://www.wutanyuhuatan.com/CN/Y2024/V48/I6/1479

Fig.1 等值反磁通瞬变电磁装置示意

Fig.2 等值反磁通瞬变电磁HPTEM-18系统

Fig.3 广义等值反磁通瞬变电磁α装置(a)和β装置(b)

Fig.4 圆形载流线圈磁场计算柱坐标系

Fig.5 广义α装置轴线切面磁场B_z=0分布(a)和轴线磁场B_z分量(b)

Fig.6 广义β装置轴线切面磁场B_z=0分布(a)和轴线磁场B_z分量(b)

Fig.7 基于广义β装置的便携瞬变电磁天线

Fig.8 便携式等值反磁通瞬变电磁系统结构

Fig.9 便携式等值反磁通瞬变电磁系统实物

Fig.10 便携式等值反磁通瞬变电磁系统野外试验应用
a—现场试验应用;b—某输电塔基测线布置及异常投影;c—L0线38 m测点观测数据;d—探测断面L0;e—探测断面L6;f—探测断面L12

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