测绘通报 ›› 2023, Vol. 0 ›› Issue (11): 177-181.doi: 10.13474/j.cnki.11-2246.2023.0349

• 测绘地理信息应用案例 • 上一篇    

基于多源点云数据的铁路线路信息化

杨志坚   

  1. 甘肃铁道综合工程勘察院有限公司, 甘肃 兰州 730000
  • 收稿日期:2023-07-07 出版日期:2023-11-25 发布日期:2023-12-07
  • 作者简介:杨志坚(1985—),男,高级工程师,主要从事工程测量方面的工作。E-mail:gkyyzj@vip.qq.com

Railway line informatization based on multi-source point cloud data

YANG Zhijian   

  1. Gansu Railway Survey Institute Co., Ltd., Lanzhou 730000, China
  • Received:2023-07-07 Online:2023-11-25 Published:2023-12-07

摘要: 相比于传统测量手段,移动扫描技术能够提高测量效率,但点云数据具有体积大、密度高、冗余数据多等特点,测量过程中扫描仪覆盖范围大,大量无效点云被获取。针对该问题,本文提出了一种基于多源点云数据提取铁路线路信息的方法。首先,根据钢轨点云的反射强度和几何特征预处理,采用微分的思想提取线路中心线;其次,对钢轨点云模型降维处理,参考高速铁路路用钢轨轨头宽度允许误差设定收敛条件建立钢轨模型,提取线路平面线和纵横断面;然后,利用主成分分析法和移动激光点聚类法提取接触线和站内附属设备;最后,基于反射强度快速分割钢轨,采用Dynamo编程语言对Revit进行二次开发,快速建模,对推动铁路设计智能化、可视化水平具有十分重要的作用。

关键词: 多源点云, 线路中心线, 钢轨模型, Dynamo, BIM

Abstract: Compared with traditional measurement methods, mobile scanning technology can improve the efficiency of measurement. However, point cloud data has the characteristics of large volume, high density and redundant data. During the measurement process, the scanner coverage is large and a large number of invalid point clouds are obtained. To solve this problem, a method of extracting railway line information based on multi-source point cloud data is proposed. According to the reflection intensity and geometric features of the rail point cloud, the center line of the line is extracted by the idea of differential. The dimension reduction of the rail point cloud model is processed, and the rail model is established according to the allowable error of the rail head width of the high-speed railway road rail as the convergence condition, and the plane line and longitudinal and transverse sections of the line are extracted. Based on the reflection intensity, the rail is quickly segmented, and the Dynamo programming language is used for secondary development of Revit to quickly model, which plays an important role in promoting the intelligent and visual level of railway design.

Key words: multi-source point cloud, track centerline, rail model, Dynamo, BIM

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