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Electromagnetic Detection System with Magnetic Dipole Source for Near-Surface Detection.
Xian Liao1, Zhengyu Xu1, Wei Liu2
1School of Electrical Engineering, Chongqing University, Chongqing 400044, China.
Sensors (Basel, Switzerland)
|December 23, 2023
Summary
This study introduces a new electromagnetic system for near-surface detection using separate transmitter-receiver coils. This design enhances measurement efficiency and portability for shallow subsurface exploration.
Area of Science:
- Geophysics
- Electromagnetism
- Nondestructive Testing
Background:
- Traditional electromagnetic systems often use integrated transmitter-receiver coils, limiting portability and efficiency.
- Near-surface detection requires robust systems capable of generating strong primary fields for reliable secondary field detection.
Purpose of the Study:
- To propose a novel nondestructive, separate transmitter-receiver (TX-RX) electromagnetic measurement system for enhanced near-surface detection.
- To improve the efficiency and portability of transient electromagnetic (TEM) systems for shallow subsurface exploration.
Main Methods:
- Development of a separate transmitter-receiver (TX-RX) coil configuration for transient electromagnetic (TEM) surveys.
- Implementation of a bipolar current-pulsed power supply (BCPPS) with a late resonant charging strategy.
- Design of a lightweight magnetic dipole source (MDS) for improved field mobility.
Main Results:
- The separate TX-RX configuration enables the generation of a large primary field necessary for detecting weak secondary fields.
- The BCPPS and resonant charging strategy effectively produce a large magnetic moment with reduced source interference.
- Laboratory tests and field experiments confirmed the system's effectiveness for efficient shallow subsurface detection within a 200 m range.
Conclusions:
- The proposed separate TX-RX electromagnetic system offers a significant advancement in near-surface detection technology.
- The system's lightweight design and improved efficiency make it highly suitable for practical field applications.
- This technology facilitates highly efficient and shallow surface detection, expanding the capabilities of geophysical exploration.
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