| 引用本文: | 韩佳明， 李冠兵， 马 鑫， 郑 通， 黄 康， 高溢邈. 地下三角形空洞地质雷达成像机理研究[J]. 雷达科学与技术, 2023, 21(2): 175-183.[点击复制] |
| HAN Jiaming, LI Guanbing, MA Xin, ZHENG Tong, HUANG Kang, GAO Yimiao. Study on Imaging Mechanism of Underground Triangle Cavity Geological Radar[J]. Radar Science and Technology, 2023, 21(2): 175-183.[点击复制] |
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| 摘要: |
| 由于地理因素和历史等原因，城市地下空洞现象越来越频繁，空洞形状也越来越复杂，但地质雷达三角形空洞扫描图像解析并不明确。基于地质雷达扫描探测全过程，将雷达紧贴地面扫描地下三角形空洞的全过程细分为三个阶段，建立各阶段水平距离与回波延时之间的关系，代入以雷达水平移动方向为横轴、回波延时为纵轴的坐标系，系统地分析不同埋深、不同边长条件下的三角形空洞地质雷达扫描图像的变化情况，结合探测实例实现地下三角形空洞地质雷达成像机理的科学解释。总结出地下不同三角形空洞第一、三阶段雷达扫描图像为斜率和截距不同的直线，第二阶段为曲率不同的对称双曲线，且随着三角形空洞的高和底边长与埋深的增大，各阶段的扫描曲线和扫描水平距离也随之发生相应的变化。对地下空间探测具有参考价值。 |
| 关键词: 三角形空洞 地质雷达 探测 成像机理 图像解释 |
| DOI：DOI:10.3969/j.issn.1672-2337.2023.02.008 |
| 分类号:TN951；TN958 |
| 基金项目:国家自然科学基金青年科学基金(No.51808444) |
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| Study on Imaging Mechanism of Underground Triangle Cavity Geological Radar |
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HAN Jiaming, LI Guanbing, MA Xin, ZHENG Tong, HUANG Kang, GAO Yimiao
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School of Civil and Architectural Engineering, Xi’an University of Science and Technology, Xi’an 710054, China
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| Abstract: |
| Due to geographical factors and historical reasons, the urban underground cavity phenomenon is becoming more and more frequent, and the cavity shape is becoming more and more complex. However, the analysis of triangle cavity scanning image of geological radar is not clear. Based on the whole process of geological radar scanning and detection, the whole process of radar scanning underground triangular cavity close to the ground is divided into three stages. The relationship between the horizontal distance and the echo delay of each stage is established. The coordinate system with the horizontal movement direction of the radar as the horizontal axis and the echo delay as the longitudinal axis is substituted. The change of the geological radar scanning image of the triangular cavity under different buried depths and different side lengths is systematically analyzed. Combined with the detection example, the scientific explanation of the geological radar imaging mechanism of the underground triangular cavity is realized. It is concluded that the first and third stages of radar scanning images of different triangular cavities are straight lines with different slopes and intercepts, and the second stage is symmetrical hyperbolic with different curvatures. With the increase of the height of the triangular cavity, the bottom length and the buried depth, the scanning curves and the horizontal distance of each stage also change accordingly. It has reference value for underground space exploration. |
| Key words: triangle cavity ground penetrating radar （GPR） probe imaging mechanism image interpretation |
