三维激光扫描技术作为一种新的测绘技术手段改变了传统的测量模式,利用三维激光扫描技术可以快速、高效、连续地获取海量的点云数据,通过处理可以快速得到被测目标的三维模型。本文主要结合徕卡Scan Station P40三维激光扫描系统介绍其...三维激光扫描技术作为一种新的测绘技术手段改变了传统的测量模式,利用三维激光扫描技术可以快速、高效、连续地获取海量的点云数据,通过处理可以快速得到被测目标的三维模型。本文主要结合徕卡Scan Station P40三维激光扫描系统介绍其在复杂建筑物精细建模中的应用,通过对点云数据及建模精度分析,得出了有益的结论。展开更多
Deformation monitoring is vital for tunnel engineering.Traditional monitoring techniques measure only a few data points,which is insufficient to understand the deformation of the entire tunnel.Terrestrial Laser Scanni...Deformation monitoring is vital for tunnel engineering.Traditional monitoring techniques measure only a few data points,which is insufficient to understand the deformation of the entire tunnel.Terrestrial Laser Scanning(TLS)is a newly developed technique that can collect thousands of data points in a few minutes,with promising applications to tunnel deformation monitoring.The raw point cloud collected from TLS cannot display tunnel deformation;therefore,a new 3D modeling algorithm was developed for this purpose.The 3D modeling algorithm includes modules for preprocessing the point cloud,extracting the tunnel axis,performing coordinate transformations,performing noise reduction and generating the 3D model.Measurement results from TLS were compared to the results of total station and numerical simulation,confirming the reliability of TLS for tunnel deformation monitoring.Finally,a case study of the Shanghai West Changjiang Road tunnel is introduced,where TLS was applied to measure shield tunnel deformation over multiple sections.Settlement,segment dislocation and cross section convergence were measured and visualized using the proposed 3D modeling algorithm.展开更多
文摘三维激光扫描技术作为一种新的测绘技术手段改变了传统的测量模式,利用三维激光扫描技术可以快速、高效、连续地获取海量的点云数据,通过处理可以快速得到被测目标的三维模型。本文主要结合徕卡Scan Station P40三维激光扫描系统介绍其在复杂建筑物精细建模中的应用,通过对点云数据及建模精度分析,得出了有益的结论。
基金The authors gratefully acknowledge the financial support provided by National Basic Research Program of China-China(973 Program grants:2011CB013800)National Natural Science Foundation of China-China(41372273)Shanghai Science and Technology Development Funds-China(14231200600,15DZ1203900,16DZ1200400).
文摘Deformation monitoring is vital for tunnel engineering.Traditional monitoring techniques measure only a few data points,which is insufficient to understand the deformation of the entire tunnel.Terrestrial Laser Scanning(TLS)is a newly developed technique that can collect thousands of data points in a few minutes,with promising applications to tunnel deformation monitoring.The raw point cloud collected from TLS cannot display tunnel deformation;therefore,a new 3D modeling algorithm was developed for this purpose.The 3D modeling algorithm includes modules for preprocessing the point cloud,extracting the tunnel axis,performing coordinate transformations,performing noise reduction and generating the 3D model.Measurement results from TLS were compared to the results of total station and numerical simulation,confirming the reliability of TLS for tunnel deformation monitoring.Finally,a case study of the Shanghai West Changjiang Road tunnel is introduced,where TLS was applied to measure shield tunnel deformation over multiple sections.Settlement,segment dislocation and cross section convergence were measured and visualized using the proposed 3D modeling algorithm.
