基于车载式激光雷达的隧道变形动态巡检技术研究

Dynamic Inspection Technology of Tunnel Deformation Based on Onboard LIDAR

[目的]针对我国隧道变形监测手段实时性差、成本高、效率低的现状,须有效提升隧道变形监测效率,对此提出基于车载式激光雷达的隧道变形监控量测方法。[方法]利用激光雷达传感器扫描收集隧道全断面三维数据,通过整体最小二乘法对隧道点云数据进行平差及曲面拟合,根据拟合的隧道断面椭圆参数进行形变分析,实现隧道变形情况的快速动态巡检。[结果及结论]试验结果表明,该方法能够快速准确地获取隧道全断面数据,结合整体最小二乘法对数据进行处理分析可有效获取隧道变形情况,基本实现在不影响隧道正常交通的情况下有效完成隧道变形动态实时监测。

[Objective]In view of the poor real-time per-formance,high cost and low efficiency of tunnel deformation monitoring methods in China,it is necessary to effectively im-prove the efficiency of tunnel deformation monitoring.Hence,a monitoring and measuring method of tunnel deformation based on onboard LIDAR(lightlaser detection&ranging)is proposed.[Method]The LIDAR sensor is used to scan and collect the three dimensional data of the whole tunnel section,and the total least squares is used to adjust the cloud data of the tunnel points and fit the surface.The deformation of tunnel section is analyzed according to the fitted ellipse parameters to realize rapid dynamic inspection of the tunnel deformation.[Result&Conclusion]The experimental results show that with this method the tunnel full section data can be obtained quickly and accurately.The tunnel deformation condition can be effectively obtained through the data processing and analysis with total least squares,basically realizing the dynamic real-time monitoring of the tunnel deformation without affecting the normal traffic in the tunnel.