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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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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. -
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