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Distribution Characteristics of Tunnel Point Cloud Obtained by Terrestrial Laser Scanning
https://orcid.org/http://orcid.org/0000-0003-2243-1584
Clarifying the point cloud distribution is the basis for the correct use of point clouds. A method is proposed to characterize the point cloud distribution using point cloud spacing and thickness. The point cloud spacing is decomposed into point spacing and ring spacing. The point cloud coordinate, spacing, and thickness formula are derived sequentially from Terrestrial laser scanning (TLS) rotation mode, tunnel geometry, and measurement error. And the effect of measurement conditions, such as TLS resolution, linearity error, and tunnel diameter, on the point cloud distribution is discussed. The resolution is positively correlated with the point cloud spacing and enhanced with the increase of scanning range, but not with the point cloud thickness; the linearity error is positively correlated with the point cloud thickness but weakened with the increase of scanning range and not with the point cloud spacing. The effect of tunnel diameter on point cloud spacing is similar to that of resolution, while the effect on point cloud thickness is close to that of linear error. Theoretical methods are used to quantitatively describe the point cloud distribution so that the point cloud can be understood and applied from the perspective of the point cloud generation principle. The effect of measurement conditions on the point cloud distribution provides a reference for the design of tunnel monitoring schemes.
Distribution Characteristics of Tunnel Point Cloud Obtained by Terrestrial Laser Scanning
https://orcid.org/http://orcid.org/0000-0003-2243-1584
Clarifying the point cloud distribution is the basis for the correct use of point clouds. A method is proposed to characterize the point cloud distribution using point cloud spacing and thickness. The point cloud spacing is decomposed into point spacing and ring spacing. The point cloud coordinate, spacing, and thickness formula are derived sequentially from Terrestrial laser scanning (TLS) rotation mode, tunnel geometry, and measurement error. And the effect of measurement conditions, such as TLS resolution, linearity error, and tunnel diameter, on the point cloud distribution is discussed. The resolution is positively correlated with the point cloud spacing and enhanced with the increase of scanning range, but not with the point cloud thickness; the linearity error is positively correlated with the point cloud thickness but weakened with the increase of scanning range and not with the point cloud spacing. The effect of tunnel diameter on point cloud spacing is similar to that of resolution, while the effect on point cloud thickness is close to that of linear error. Theoretical methods are used to quantitatively describe the point cloud distribution so that the point cloud can be understood and applied from the perspective of the point cloud generation principle. The effect of measurement conditions on the point cloud distribution provides a reference for the design of tunnel monitoring schemes.
Distribution Characteristics of Tunnel Point Cloud Obtained by Terrestrial Laser Scanning
https://orcid.org/http://orcid.org/0000-0003-2243-1584
Clarifying the point cloud distribution is the basis for the correct use of point clouds. A method is proposed to characterize the point cloud distribution using point cloud spacing and thickness. The point cloud spacing is decomposed into point spacing and ring spacing. The point cloud coordinate, spacing, and thickness formula are derived sequentially from Terrestrial laser scanning (TLS) rotation mode, tunnel geometry, and measurement error. And the effect of measurement conditions, such as TLS resolution, linearity error, and tunnel diameter, on the point cloud distribution is discussed. The resolution is positively correlated with the point cloud spacing and enhanced with the increase of scanning range, but not with the point cloud thickness; the linearity error is positively correlated with the point cloud thickness but weakened with the increase of scanning range and not with the point cloud spacing. The effect of tunnel diameter on point cloud spacing is similar to that of resolution, while the effect on point cloud thickness is close to that of linear error. Theoretical methods are used to quantitatively describe the point cloud distribution so that the point cloud can be understood and applied from the perspective of the point cloud generation principle. The effect of measurement conditions on the point cloud distribution provides a reference for the design of tunnel monitoring schemes.
Distribution Characteristics of Tunnel Point Cloud Obtained by Terrestrial Laser Scanning
Lecture Notes in Civil Engineering
Wu, Wei (editor) / Leung, Chun Fai (editor) / Zhou, Yingxin (editor) / Li, Xiaozhao (editor) / Sui, Haitong (author) / Cui, Ying (author)
Conference of the Associated research Centers for the Urban Underground Space ; 2023 ; Boulevard, Singapore
2024-07-10
7 pages
Article/Chapter (Book)
Electronic Resource
English
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