Imaging detection and recognition technology of underground cable based on ground penetrating radar
LI Jing-Xiang1(), ZHAO Ming1, LAI Hao1, XIONG Shuang-Cheng1, TANG Yang2
1. GZ Bureau, EHV Power Transmission Company of China Southern Power Gird, Guangzhou 510000, China 2. College of Electrical Engineering & New Energy, China Three Gorges University, Yichang 443002, China
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.
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