Bridge security evaluation method based on TLS (three-dimensional laser scanning) technique
A safety assessment and bridge technology, applied in the field of measurement, can solve the problems of manpower and time consumption, manual extraction, etc., and achieve the effect of cost competitiveness improvement, good compatibility and easy operation
Inactive Publication Date: 2016-05-04
JIANGSU UNIV OF SCI & TECH
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Problems solved by technology
Although CAD and CAE software such as CATIA and Pro / E can reversely model the point cloud obtained by detection, it needs to manually extract the feature points and feature lines to generate the model, which consumes a lot of manpower and time; therefore, we need an automated Advanced model reconstruction technology, so that the actual model and prediction model of the bridge can be constructed in time to avoid various safety hazards
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[0021] The technical solutions of the present invention will be described in detail below in conjunction with the accompanying drawings.
[0022] Such as figure 1 As shown, the present invention provides a bridge safety assessment method based on TLS technology, including three parts: data collection, model reconstruction and intelligent prediction, which can be decomposed into the following steps:
[0023] (1) 3D laser scanning of the target bridge and preprocessing of point cloud data
[0024] a) Use the 3D laser scanner to scan the target bridge to obtain the point cloud data of each area of the bridge, which is automatically matched and stitched by LaserControl software and stored in the disk matrix of the mobile device; at the same time, the color information is collected by an industrial camera and added to the aforementioned point cloud data , enhance the visualization of the model.
[0025] The three-dimensional laser scanner can be a high-speed laser scanning devi...
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The invention discloses a bridge security evaluation method based on a TLS technique. The method comprises following steps: obtain point cloud data of each area of a bridge, preprocessing the obtained point cloud data; further processing the point cloud data, thus obtaining a complete three-dimensional model and deformation and crack data, then carrying out finite element analysis to an initial model, thus obtaining deformation and crack results of materials, comparing the processing result of the point cloud data and a finite element model; correcting the finite element model according to the point cloud data; reconstructing the finite element model according to the corrected parameters, analyzing structure deformation and crack conditions, comparing the deformation and crack results of the finite element model with the point cloud data, thus obtaining numeric comparison results, displaying the results with a curve or a cloud graph; and intelligently predicting the future deformation conditions of the structure by the reconstructed finite element model, carrying out risk analysis, and giving a risk analysis report. In adoption of the method, the bridge detection time can be shortened.
Description
technical field [0001] The invention belongs to the technical field of measurement, in particular to a method for establishing a three-dimensional model of a bridge based on a ground three-dimensional laser scanning (TLS) technology and performing safety assessment, which can be used for bridge detection and assessment. Background technique [0002] Due to the differences in geological conditions, underground facilities, subway transportation conditions and requirements, and regulatory requirements between domestic and foreign countries, the application of 3D laser scanning technology in China requires a large number of independently developed software and software that are suitable for China's national conditions and application needs. Only with supporting hardware can it be possible to exert the technological level and function that the technology should have. Traditional detection methods mainly include total station, GPSRTK technology and so on. When the total station l...
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Login to View More IPC IPC(8): G06F17/50
CPCG06F30/13G06F30/23
Inventor 杨浩徐向阳潘志宏庄园
Owner JIANGSU UNIV OF SCI & TECH