基于激光扫描点云的脚手架杆件角度获取  

Angle Acquisition of Scaffold Rod Based on Laser Scanning Point Cloud

作　　者：张雨鸣 管东芝[1] 刘家彬[1] ZHANG Yuming;GUAN Dongzhi;LIU Jiabin(School of Civil Engineering,Southeast University,Nanjing,Jiangsu211189,China)

机构地区：[1]东南大学土木工程学院,江苏南京211189

出　　处：《施工技术（中英文）》2024年第2期103-109,共7页Construction Technology

基　　金：国家自然科学基金(52278154);江苏省自然科学基金(BK20231429)

摘　　要：脚手架变形监测是脚手架安全的基础,施工现场一般采用传感器或全站仪进行点式监测,监测效率和准确性均较低。因此,提出一种基于点云的脚手架杆件角度获取方法。首先采用激光扫描仪对搭设好的脚手架进行扫描,对收集到的脚手架点云数据进行预处理后,基于RANSAC算法拟合脚手架杆件圆柱体,提取不同杆件圆柱体方程与轴线方向向量,计算方向向量间的角度。为验证所提方法的有效性,将脚手架点云模型分别围绕某一轴或某一点旋转不同的理论角度,得到新点云模型,然后采用上述方法计算其与原模型间的角度,与理论角度进行比较。结果显示,计算角度与理论角度间的最大相对误差为125%,平均相对误差为075%,验证了该方法的可靠性,为脚手架变形监测提供新的思路。Scaffold deformation monitoring is the basis of scaffold safety,and construction sites generally use sensors or total stations for point monitoring,with low monitoring efficiency and accuracy.Therefore,a scaffold rod angle acquisition method based on point cloud is proposed.Firstly,a laser scanner is used to scan the erected scaffold,and after the pre⁃processing of the collected scaffold point cloud data,the scaffold rod cylinders are fitted based on the RANSAC algorithm,and different rod cylinder equations are extracted from the axial direction vectors,and the angles between the direction vectors are calculated.In order to verify the effectiveness of the proposed method,the scaffold point cloud model is rotated around an axis or a point at different theoretical angles to obtain a new point cloud model,and then the above method is used to calculate the angle between it and the original model,and compared with the theoretical angle.The results show that the maximum relative error between the calculated angle and the theoretical angle is 125%,and the average relative error is 075%,which verifies the reliability of the method and provides new ideas for scaffold deformation monitoring.

关 键 词：信息化 脚手架 点云 圆柱体 拟合 角度 监测 变形 

分 类 号：TU17[建筑科学—建筑理论]