南方电网技术2024，Vol.18Issue(12)：10-18,9.DOI:10.13648/j.cnki.issn1674-0629.2024.12.002
基于GprMax正演模拟的直埋电缆探测效果影响因素分析
Influence Factor Analysis on Detection Effect for Directly Buried Cable Based on GprMax Forward Modeling
摘要
Abstract
Geographic location of underground cable is important information in urban construction and power operation and maintenance.Ground penetrating radar is always used in detection for directly buried cable,but the influencing factors of its detection effect for underground cable is unclear.GprMax forward modeling method is used to analyze the ground penetrating radar echo image of underground cable,including buried depth,soil dielectric constant,antenna center frequency,pipeline material and cable channel structure.Furthermore an experiment is carried out to compare the ground penetrating radar image of cable,metal and PVC pipes at 0.4 GHz and 0.9 GHz antenna center frequency.Finally a field test for underground cable is carried out.There is a distinc-tive hyperbola in the ground penetrating radar image.The hyperbola shape is mainly influenced by burial depth and soil dielectric constant.It is difficult to distinguish different material pipeline based on the hyperbola shape.The fine sand and cover plate around underground cable can weaken the echo signal,and lead to hyperbola layering.In order to obtain good detection effect,it needs to detect the whole cable channel instead of the cable with 0.4 GHz center frequency antenna.关键词
直埋电缆/探地雷达/时域有限差分/回波图像Key words
directly buried cable/ground penetrating radar/FDTD/echo image分类
信息技术与安全科学引用本文复制引用
李国伟,王俊波,张殷,唐琪,简淦杨,姬煜轲,何智鹏..基于GprMax正演模拟的直埋电缆探测效果影响因素分析[J].南方电网技术,2024,18(12):10-18,9.基金项目
国家重点研发计划资助项目(2022YFE0205100) （2022YFE0205100）
中国南方电网有限责任公司科技项目(GDKJXM20220265).Supported by the National Key Research and Development Program of China(2022YFE0205100) （GDKJXM20220265）
the Science and Technology Project of China Southern Power Grid Co.,Ltd.(GDKJXM20220265). （GDKJXM20220265）
