Fine structure deformation monitoring method and system based on ground three-dimensional laser scanning

Abstract

The invention provides a fine structure deformation monitoring method based on ground three-dimensional laser scanning. The method comprises steps that, a GPS or a total station is utilized to arrange artificial target points, and a target point monitoring net is established; point cloud data at a surface of a structure at different moments are acquired by utilizing a ground three-dimensional laser scanner; data acquired by the target point monitoring net and data acquired by the ground three-dimensional laser scanner are converted to a same reference coordinate system; the data in the same reference coordinate system are utilized to determine and fit a geometrical model of the structure; point cloud data segmentation is carried out according to the geometrical model of the structure obtained through fitting, the point cloud data segmentation is divided into multiple parts, and each part is fitted into one representative point; change of coordinates and vectors of the representative points obtained through point cloud data fitting at different moments are contrasted to carry out fine structure deformation analysis. The fine structure deformation monitoring method can realize monitoring on fine structure deformation.

Description

technical field [0001] The invention relates to the field of surveying and mapping science and technology, in particular to a method and system for fine deformation monitoring of structures based on ground three-dimensional laser scanning. Background technique [0002] Various large-scale infrastructures play an important role in the development of the national economy. With the rapid development of the economy, new large-scale construction projects are also emerging. However, disasters such as tunnel collapse, dam collapse and bridge collapse continue to occur, seriously endangering the safety of human life and property. Therefore, deformation monitoring of typical structures such as dams, bridges, and tunnels is particularly important. [0003] Deformation monitoring mainly includes measurement techniques such as level, total station, GPS, close-range photogrammetry and 3D laser scanner. Technologies such as total stations and GPS can only obtain a few discrete points, w...

AI Technical Summary

Problems solved by technology

[0005] Aiming at the defects in the prior art, the present invention provides a ground-based three-dimensional laser scanning method and system for fine deformation monitoring of structures to solve the problem that the point cloud data collected by a three-dimensional laser scanner cannot be monitored for fine deformation of structures

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