无人船辅助激光雷达在跨河测量中的应用

Application of USV and LiDAR Technology in the Cross-river Measurement

为解决跨河测量工序相对繁琐、生产周期长、无法获取河底地形等问题,提出一种利用无人船辅助机载激光雷达技术完成跨河地形测量的方法,即通过航摄手段同时获取测区数码影像、激光点云,利用无人船采集河底离散点,再基于分类后地面点云集与河底离散点集自动生成铁路纵断面、横断面及等高线等地形表示成果。该方法实现了以上地形表示成果的快速生成,经验证,超过90%的断面节点满足断面测量距离限差±0.3 m、高程限差±0.35 m的精度要求。

In order to solve problems including cumbersome procedures,long production cycles,and inability when obtaining river bottom terrain,this paper proposed a method of using USV and LIDAR technology to complete cross-river measurement.The method automatically generated terrain representation results such as railway sections and contour lines based on sorted ground point clouds and discrete points at river bottom.The method realized the rapid generation of terrain representation results,more than 90%of the section nodes were verified to meet the accuracy requirements.Section measurement distance tolerance was±0.3 m and elevation tolerance was±0.35 m,which suggested that the method can be used for railway surveys.