无人机LiDAR在道路勘测设计中的应用

Application of UAV LiDAR in Road Survey and Design

随着我国道路建设逐步开始向地形复杂多变地区推进,采用传统的RTK技术已经无法完成道路勘测任务,无人机机载激光雷达(LiDAR)测量技术凭借穿透性的优势在道路勘测方面得到了广泛应用。本文结合道路勘测项目,采用渐进三角网滤波算法提取地面点,再通过最邻近点搜索算法获取道路的纵横断面图。实验结果表明,在地形复杂的山区,利用无人机LiDAR测量技术能够快速生成勘测设计所需的1∶2 000地形图和道路纵横断面,与检查点结果对比,平面误差控制在10 cm范围内,高程误差控制在30 cm范围内。

As road construction has gradually begun to advance to areas with complex and changeable terrain, it is no longer possible to complete road survey tasks with traditional RTK technology. UAV airborne lidar(LiDAR) measurement technology has been widely used relies on its high efficiency and high precision advantages in road surveying. In this paper, combined with a highway survey project, the progressive triangulation filtering algorithm is used to extract ground points and obtain the vertical and horizontal sections of the planned route in the survey area. Experimental results show that in mountainous areas with complex terrain, the use of UAV LiDAR measurement technology can quickly generate 1∶2000 topographic maps and road cross-sections required for survey and design. Compared with the results of checkpoints, the plane error is controlled within 10 cm, and the elevation error is controlled within 30 cm.