Algorithm for beam deformation modeling from LiDAR data

作     者：Cabaleiro, M. Riveiro, B. Arias, P. Caamano, J. C. 

作者机构：Univ Vigo Sch Ind Engn Dept Mat Engn Appl Mech & Construct Vigo 36208 Spain Univ Vigo Sch Min Engn Dept Nat Resources & Environm Engn Vigo 36310 Spain 

出 版 物：《MEASUREMENT》 (测量)

年 卷 期：2015年第76卷

页      面：20-31页

核心收录：

学科分类：08[工学] 080401[工学-精密仪器及机械] 0804[工学-仪器科学与技术] 081102[工学-检测技术与自动化装置] 0811[工学-控制科学与工程] 

基　　金：Spanish Ministry of Economy and Competitiveness through the project HERMES - Healthy and Efficient Routes in Massive Open-Data based Smart Cities [TIN2013-46801-C4] Xunta de Galicia [CN2012/269] 

主　　题：Terrestrial laser scanning Point cloud Measurements Automatic 3D modeling Extrusion 

摘      要：This paper presents an approach for 3D modeling of beams in structures using laser scanning after identifying several deficiencies in current methodologies of model extrusion. It highlights the errors due to the actual deformation of beams, which does not correspond with the idealized straight line. To avoid these errors, a novel algorithm has been developed. This algorithm performed the segmentation of a beam point cloud by means of a 2.5D approach based on digital image processing. Thereafter, a polynomial surface fitting of flange points is performed in order to model the deformations of beams based on the combined effects of bending moment and torsions deflections. The tool automatically compares the idealized straight plane of flanges with a 3D curved surface reconstructed from the scanned data and analyzes whether it is above the maximum limits established by structural codes. Finally, the end product is a 3D model of the deformed beam. (C) 2015 Elsevier Ltd. All rights reserved.