Displacement Estimation Error in Laser Scanning Monitoring of Retaining Structures Considering Roughness

Sensors

卷:21

Hyungjoon Seo¹  Yang Zhao²  Cheng Chen² 

[1] Department of Civil Engineering and Industrial Design, University of Liverpool, Liverpool L69 3BX, UK;

[2] Department of Civil Engineering, Xi’an Jiaotong Liverpool University, Suzhou 215000, China;

关键词: point cloud;    laser scanning;    retaining structure;    C2C;    C2M;    M3C2;   

DOI  :  10.3390/s21217370

来源: DOAJ

【 摘 要 】

Point clouds were obtained after laser scanning of the concrete panel, SMW, and sheet pile which is most widely used in retaining structures. The surface condition of the point cloud affects the displacement calculation, and hence both local roughness and global curvature of each point cloud were analyzed using the different sizes of the kernel. The curvature of the three retaining structures was also analyzed by the azimuth angle. In this paper, artificial displacements are generated for the point clouds of 100%, 80%, 60%, 40%, and 20% of the retaining structures, and displacement and analysis errors were calculated using the C2C, C2M, and M3C2 methods. C2C method is affected by the resolution of the point cloud, and the C2M method underestimates the displacement by the location of the points in the curvature of the retaining structures. M3C2 method had the lowest error, and the optimized M3C2 parameters for analyzing the displacement were presented.

【 授权许可】

Unknown