China Mining Products Safety Approval and Certification Center

裸露断面拾取技术是实现机载探地雷达空耦天线悬空高度智能调控的基础。井工煤矿低频空耦雷达远距离勘探时,裸露断面表现为近似水平直线特征,目前以人工解译为主,无法满足工业化实时、智能、高效的应用需求。针对上述问题,提出了一种基于探地雷达数据而非B-Scan图像的微粗糙裸露断面拾取方法;提出限定时间窗口的道平均直达波滤波方法,可以保留目标界面的细节响应特征。采用时变反褶积方法,解析电磁波干涉效应导致的重叠波形中脉冲,提高波形质量;提出以A-Scan数据序列波峰点为潜在目标曲线特征点,并采用峰值检测算法提取其位置信息,以提高检测效率;提出基于栅格化二次线性拟合方法的曲线生长及合并方法,提高对电磁波干涉效应的鲁棒性。最后,利用工程试验验证了该方法的适用性。

The automatic detection technology of exposed cross-sections is the basis for intelligent control of the suspension height of airborne-coupled ground-penetrating radar antennas. When low-frequency airborne-coupled ground-penetrating radar is used for long-distance exploration in underground coal mines, the exposed cross-sections exhibit characteristics of approximately horizontal straight lines. Currently, it mainly relies on expert manual interpretation, which cannot meet the industrialized requirements of real - time, intelligent, and efficient applications. Therefore, a micro - rough exposed cross - section automatic detection method is proposed based on peak detection algorithm and grid - based quadratic linear fitting method. A window-constrained average method is proposed to effectively filter out direct waves while preserving the detailed response characteristics of the target interface. The time-varying deconvolution method is used to suppress the convolution effect caused by overlapping waveforms to improve waveform quality. A peak detection algorithm based on the idea of local extremes is proposed to automatically extract the peak position information in the A-scan graph of ground-penetrating radar. A grid-based quadratic linear fitting method is proposed to map the peaks to a two-dimensional grid and perform linear fitting. Based on the correlation coefficient and first-order derivative of the fitting curve, the curves are classified, and secondary linear fitting is performed to automatically extract the position labeling and coordinate information of layered target interfaces. Engineering experimental methods are used to verify the applicability of this method.

中国煤炭科工集团有限公司科技创新创业资金专项“煤矿巡检机器人系统安全策略及检验技术研究”(2022-2-MS008)

吴钰晶.基于峰值检测与栅格化二次拟合算法的微粗糙裸露断面拾取方法[J].煤炭工程,2024,56(12):155-160.