基于直升机激光点云的分裂导线重建研究

电力线三维模型是输电线路安全和增容分析的基础,机载/直升机激光雷达技术已经成为电力三维模型重建的重要技术手段,但少有研究涉及分裂导线的高精度建模。通过分析分裂导线点云数据的特点,提出一种基于点云分段、聚类分析和曲线拟合的分裂导线精细三维重建方法。最后利用获取的四分裂导线点云数据,考虑实际作业中可能遇到的点云缺失、密度偏低等情况,对算法进行了测试和分析。结果表明:该算法能够自适应地识别点云中分裂导线的数目,分离不同分裂导线的点云,建模结果可以满足输电线路安全分析的要求。

Study on Reconstruction of Bundled Conductors from Helicopter-borne LiDAR Data

Detecting power transmission lines is useful in the management of power line network.With the increasing applications of LiDAR (Light Detection And Ranging) in the helicopter-based inspection,many studies have focused on the three dimension model of the transmission lines.However,reconstructing the bundled conductors from points cloud is more complex than the non-bundled ones.In this paper,we proposed an automatic algorithm to reconstruct the bundled conductors from the helicopter-borne LiDAR points cloud.The power line is divided into sections along its orientation at first.Secondly,the points in each section are projected onto a principle plane,the clustering is applied in that plane.Thridly,with a clusters merging process,the points from the same bundled conductors in the sections are combined.Finally,the power lines are reconstructed with curve fitting.The algorithm is validated by the points cloud of four-bundled conductors.The results indicated that the proposed method is self-adaptable and effective in bundled conductors reconstruction and the quality of data has low impact on the final results.