基于三维激光扫描技术的桥塔挠度测量  

Pylon Deflection Monitoring Based on Terrestrial Laser Scanning

作　　者：徐进军[1,2,3] 郭鑫伟 张洪波[1] 

机构地区：[1]武汉大学测绘学院,湖北武汉430079 [2]精密工程与工业测量国家测绘地理信息局重点实验室,湖北武汉430079 [3]地球空间信息技术协同创新中心,湖北武汉430079

出　　处：《测绘地理信息》2017年第2期67-70,共4页Journal of Geomatics

基　　金：国家自然科学基金资助项目(41274021)

摘　　要：现有的单点式挠度测量需要安装目标点,由于点数少,难以全面给出大型物体的变形。地面三维激光扫描技术采用了无接触式的测量方式,可以在短时间内获取物体表面高精度和高密度的三维坐标。将该技术应用到桥塔挠度监测方面,针对桥塔特点,提取桥塔棱线处的点云,通过去噪、拟合等处理方法,获取在不同荷载情况下整体桥塔的挠度变化,并进行对比分析。试验证明了该方法在桥塔挠度测量中的可行性。The existent deflection survey about single-pointmode cannot describe the whole deformation of large object because there are only a few points.Terrestrial laser scanning technology can obtain vast amounts of 3Dcoordinates on the object surface with high-precision and high-speed.This paper applies it in the pylon deflection monitoring.Against the characteristics of pylon,the point cloud near the ridge lines is extracted.By de-noising and data fitting process,the deflection change of the pylon under different loadings is achieved,compared and analyzed.The feasibility of this method in pylon deflection measurement is verified through experiment.

关 键 词：点云 桥塔 挠度 变形监测 

分 类 号：P234.5[天文地球—摄影测量与遥感] P258[天文地球—测绘科学与技术]