地下电缆的探地雷达图像特征与识别技术

doi:10.11720/wtyht.2020.1339

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Abstract

In order to realize the rapid detection and identification of underground power cables, this paper proposed a method based on ground penetrating radar for imaging and identification of underground cables. Firstly, the characteristics of the detection waveforms of the underground charging cable and the non-charged medium under the action of ground penetrating radar were analyzed by forward modeling experiments, which highlighted the particularity of the reflected waveform of the charged cable, and then the magnetic field radiation of the cable under the common wiring mode was established based on the principle of magnetic field superposition. The calculation model explained the cause and particularity of cable detection waveform from the perspective of cable structure and magnetic field distribution, and further highlighted the difference between the cable and other non-charged formation media. A method for detecting and identifying underground cable based on ground penetrating radar was proposed. Finally, the proposed method was verified by inversion experiments. The experimental results show that the proposed method has a good application effect in cable detection and identification.

Key words： ground penetrating radar underground cable forward modeling rapid detection

Received: 28 June 2019 Published: 29 December 2020

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	Articles by authors
	Jing-Xiang LI
	Ming ZHAO
	Hao LAI
	Shuang-Cheng XIONG
	Yang TANG

Cite this article:

Jing-Xiang LI,Ming ZHAO,Hao LAI, et al. Imaging detection and recognition technology of underground cable based on ground penetrating radar[J]. Geophysical and Geochemical Exploration, 2020, 44(6): 1482-1489.

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https://www.wutanyuhuatan.com/EN/10.11720/wtyht.2020.1339 OR https://www.wutanyuhuatan.com/EN/Y2020/V44/I6/1482

The radar detection images of different medium

The schematic diagram of cable structure

The schematic diagram of cable magnetic field radiation

The distribution curve of cable magnetic field strength

The schematic diagram of GPR electromagnetic wave radiation cable

The single channel waveform of a typical medium

The detection site map of the cell

The detection waveform of power cable of survey area 1

The verification diagram of site excavation of survey area 1

The detection waveform of non-charged medium of survey area 1

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