三维激光扫描技术在既有轨道检测中的应用

在既有轨道检测中,传统接触式测量的检测方法存在速度慢、影响列车运营、威胁测量人员人身安全等缺陷。该文采用三维激光扫描技术与传统检测方法相结合的形式,利用万能道尺、RTK技术、水准仪和全站仪等仪器对测区内长480 m轨道进行接触式测量;同时结合三维激光扫描技术进行全景扫描,基于三维激光扫描仪获取的目标线路点云数据进行点云处理,对线路进行封装并提取目标线路特征值。经对所有现场采集的数据做后期处理及比对发现,扫描仪获取的点云数据经切片可以得到的轨道特征值均与传统勘测方法获取的数值相差,而且勘测速度、质量都有所提高,降低劳动强度和周期,完全可以满足现代既有轨道检测要求。

In the existing track inspection,the traditional contact measurement detection methods are slow,affect train operation,threaten the personal safety of measuring personnel,and so on.This paper adopts the combination of 3D laser scanning technology and traditional detection methods,and uses universal ruler,RTK technology,level,total station and other instruments to measure the track with a length of 480 m in the survey area;at the same time,based on 3D laser scanning technology for panoramic scanning,point cloud processing based on the point cloud data of the target line obtained by 3D laser scanner,the line is encapsulated and the eigenvalues of the target line are extracted.After post-processing and comparison of all the data collected in the field,it is found that the track characteristic values obtained by slicing the point cloud data obtained by scanner are different from those obtained by traditional survey methods,and the survey speed and quality have been improved,and the labor intensity and cycle have been reduced.It can fully meet the requirements of modern existing track detection.