【摘要】 针对直升机激光雷达电力巡线中电力线三维重建方法研究的不足,文章提出一种长距离架空输电线路直升机激光雷达点云数据的电力线三维重建方法,它包括电力线激光雷达点云聚类、悬挂点检测和电力线三维建模等3个部分:首先运用3D连通成分分析分离出某一电力线的点;然后在XOY平面上对某一电力线的点进行线性拟合和格网索引,通过二阶导数分析分离出某一档某一根电力线的点;最后对单根电力线进行三维建模,且三维模型使用比例因子作为抛物线参数。实验表明,该方法在重建过程中对输电线走廊内线路数目、电力线的根数、电力线类型、电力线的空间配置结构、线路长度、线路曲率等因素不敏感,且具有效率高、重建精度高的优势。更多还原

【Abstract】 Aiming at the insufficiency of studying on reconstructing 3Dpowerlines in the power line patrols using LiDAR systems mounted on helicopters,the paper proposed a 3Dreconstruction method of reconstructing the power lines from the airborne LiDAR point clouds of long overhead power transmission corridor,which was composed of three main steps,including clustering of power line LiDAR points,detection of the suspension points,and modeling of power lines:first,3Dconnected component analysis was proposed to cluster the power line points into many segments,each segment including the points belonging to one powerline;second,on the XOYplane,a line was fitted by the points in a segment,the points in a segment were indexed by a row of grids,and the second derivative was employed to separate the points into several sub-segments,each including the points belonging to one powerline in a span;at last,in the modeling of each powerline in a span,the scale of each point projected on the fitted line was regarded as a parameter of the parabola.Experimental result showed that the proposed method would be robust to many conditions such as number of the routines or power lines,various types of power lines or their arrangement,length of a span,and curvature of the routine with high efficiency and high accuracy of automatically reconstructing 3Dpowerlines.更多还原