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Displacement Estimation Error in Laser Scanning Monitoring of Retaining Structures Considering Roughness
- Source :
- Sensors (Basel, Switzerland), Sensors, Vol 21, Iss 7370, p 7370 (2021), Sensors, Volume 21, Issue 21
- Publication Year :
- 2021
- Publisher :
- MDPI, 2021.
-
Abstract
- 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.
- Subjects :
- Surface (mathematics)
Materials science
Laser scanning
Chemical technology
laser scanning
Point cloud
Geometry
Surface finish
TP1-1185
M3C2
Curvature
Biochemistry
Atomic and Molecular Physics, and Optics
Displacement (vector)
Article
Analytical Chemistry
C2C
Azimuth
C2M
Kernel (statistics)
Electrical and Electronic Engineering
Instrumentation
point cloud
retaining structure
Subjects
Details
- Language :
- English
- ISSN :
- 14248220
- Volume :
- 21
- Issue :
- 21
- Database :
- OpenAIRE
- Journal :
- Sensors (Basel, Switzerland)
- Accession number :
- edsair.doi.dedup.....be297213b208368d323af4cbd2cf7c7e