| 基于空间圆模型的隧道全局中轴线提取方法 |
| |
| 引用本文： | 林景峰,徐飞,周茂伦.基于空间圆模型的隧道全局中轴线提取方法[J].北京测绘,2021,35(2):250-255. |
| |
| 作者姓名： | 林景峰 徐飞 周茂伦 |
| |
| 作者单位： | 山东科技大学测绘科学与工程学院,山东青岛266590;青岛秀山移动测量有限公司,山东青岛266590 |
| |
| 摘 要： | 隧道中轴线不仅能够检核隧道竣工测量,而且在隧道变形监测中其精度直接影响横断面提取的准确性。本文提出一种精确提取隧道全局中轴线的方法:首先将隧道三维点云投影至水平面形成平面点云,并采用Delaunay三角网算法获取点云边界;其次利用点云边界中转折点间的距离与隧道直径的关系提取出隧道边界线;然后依据隧道边界和中心的几何关系提取出水平中轴线,并以此提取隧道横断面;最后对隧道横断面进行空间圆模型拟合生成隧道中轴线。通过实验分析,本文方法能够适应于长距离、弯曲型隧道,为隧道中轴线提取研究提供借鉴依据。
|
| 关 键 词： | 隧道工程 三维激光扫描 中轴线 空间圆模型 |
The Method of Extracting Global Central Axis of Tunnel Based on Spatial Circle Model |
| |
| LIN Jingfeng,XU Fei,ZHOU Maolun.The Method of Extracting Global Central Axis of Tunnel Based on Spatial Circle Model[J].Beijing Surveying and Mapping,2021,35(2):250-255. |
| |
| Authors: | LIN Jingfeng XU Fei ZHOU Maolun |
| |
| Institution: | (College of Geomatics,Shandong University of Science and Technology,Qingdao Shandong 266590,China;Qingdao Xiushan Mobile Survey,Qingdao Shandong 266590,China) |
| |
| Abstract: | The central axis of the tunnel can not only check the completion measurement of the tunnel,but also its accuracy directly affects the accuracy of cross-section extraction in tunnel deformation monitoring.This paper proposes a method for accurately extracting the global central axis of the tunnel:first project the three-dimensional point cloud of the tunnel onto the horizontal plane to form a plane point cloud,and use the Delaunay triangulation algorithm to obtain the point cloud boundary;Secondly,use the relationship between the distance between the turning points in the point cloud boundary and the tunnel diameter to extract the tunnel boundary line;Then extract the horizontal central axis according to the geometric relationship between the tunnel boundary and the center,and use this to extract the cross section of the tunnel;Finally,a space circle model was fitted to the cross section of the tunnel to generate the central axis of the tunnel.Through experimental analysis,the method in this paper could be adapted to long-distance,curved tunnels,which could provide reference for the study of tunnel central axis extraction. |
| |
| Keywords: | tunneling engineering three dimensional(3D)laser scanning central axis space circle model |
| 本文献已被 CNKI 维普 万方数据 等数据库收录！ |
|
