SATEM: A new drone-based semi-airborne transient electromagnetic receiver system

IF 2.1 3区地球科学 Q2 GEOSCIENCES, MULTIDISCIPLINARY

Journal of Applied Geophysics Pub Date : 2025-06-27 DOI:10.1016/j.jappgeo.2025.105848

Nuoya Zhang , Huaifeng Sun , Yuchao Liu , Ziqiang Zheng , Rui Liu , Shangbin Liu , Xushan Lu

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引用次数: 0

Abstract

Semi-airborne Transient Electromagnetic method (SATEM) stands as a pivotal tool for subsurface mineral resources exploration, geological survey, and groundwater investigation in complex terrains. This study develops a bespoke SATEM receiver system tailored for such explorations, comprising a lightweight recorder and small-size receiving coil. The recorder employs a dual microprogrammed control unit (MCU) hierarchical structure framework, facilitating seamless SATEM data acquisition and storage. Meanwhile, the receiving coil, featuring a shield and multi-turn loop, integrates an embedded signal acquisition module capable of storing electromagnetic signals alongside Global Navigation Satellite System (GNSS), acceleration, and altitude data. Time synchronization between receiver and transmitter relies on the pulse per second (PPS) signal from GNSS, so it can work with any transmitter systems equipped with GNSS based synchronization. The low internal noise of the receiver system is about 0.834 μV and it has a high sampling rate of 256 kbps. We carried out a geophysical survey using the developed SATEM receiver system in Zhaiya Tunnel in Guangxi, China, where the topographical relief is significant and geological data are scarce. The SATEM system detected subsurface karst development area around the tunnel site, providing critical information ahead of tunnel construction. The results are in good agreement with the true karst revealed during the tunnel excavation.

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SATEM：一种新型的基于无人机的半机载瞬变电磁接收系统

半机载瞬变电磁法（SATEM）是复杂地形下地下矿产资源勘探、地质调查和地下水调查的重要工具。该研究为此类勘探开发了一种定制的SATEM接收系统，包括一个轻型记录器和小尺寸接收线圈。记录仪采用双微程序控制单元（MCU）分层结构框架，便于SATEM数据的无缝采集和存储。同时，接收线圈具有屏蔽和多匝环路，集成了一个嵌入式信号采集模块，能够存储电磁信号以及全球导航卫星系统（GNSS）、加速度和高度数据。接收机和发射机之间的时间同步依赖于来自GNSS的每秒脉冲（PPS）信号，因此它可以与任何配备GNSS同步的发射机系统一起工作。接收系统的内部噪声低，约为0.834 μV，采样率高达256 kbps。利用研制的SATEM接收系统对地形起伏较大、地质资料较少的广西寨崖隧道进行了物探。SATEM系统探测隧道现场附近的地下岩溶发育区域，为隧道施工提供关键信息。分析结果与隧道开挖过程中真实的岩溶特征吻合较好。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Journal of Applied Geophysics 地学-地球科学综合

CiteScore

3.60

自引率

10.00%

发文量

274

审稿时长

4 months

期刊介绍： The Journal of Applied Geophysics with its key objective of responding to pertinent and timely needs, places particular emphasis on methodological developments and innovative applications of geophysical techniques for addressing environmental, engineering, and hydrological problems. Related topical research in exploration geophysics and in soil and rock physics is also covered by the Journal of Applied Geophysics.