Three-dimensional-scanning-based steel structure digital detection method

Abstract

The invention relates to a three-dimensional-scanning-based steel structure digital detection method capable of conveniently and accurately detecting structural dimensions and linear shapes of a complex curved specially-shaped structure and a super-large-sized structure in a steel bridge. On the basis of the design structure, a theoretical data model is constructed by using three-dimensional digital modeling software and control points are arranged; according to operation requirements of 3D scanning equipment, point cloud data collection is performed on a bridge steel structure entity in a suitable environment, carrying out point cloud cleaning and splicing processing, and generating a detection data model by using special software; and carrying out fitting on the theoretical data model and the test data model based on a certain rule and determining a deviation between the theoretical data model and the detected data model to obtain a deviation analysis report of a manufacturing structure and a design structure. The key points of the steel structure digital detection method include creation accuracy of the theoretical data model, measurement accuracy of a 3D scan measurement generation test data model, and deviation analysis processing rules of the two data models. The steel structure digital detection method has the wide application range and can be applied to structural detection under conditions of three-dimensional scanning measurement.

Description

technical field [0001] The invention relates to a steel structure digital detection method based on three-dimensional scanning, which can conveniently and accurately detect complex curve special-shaped structures and super-large-sized structures in steel bridges. The method belongs to the field of steel bridge processing and manufacturing technology and construction management methods . Background technique [0002] In the past, the size of the bridge steel structure was measured using steel pan rulers, rulers and other measuring tools. The height was measured using a level gauge and a tower ruler. The structural alignment was measured using a total station or theodolite. The traditional measurement method has been used in various industries for many years, has rich implementation experience, and can meet the requirements of pre-control accuracy for the manufacture of general bridge steel structures. However, for bridge steel structures with complex curves and structures, t...

AI Technical Summary

Problems solved by technology

Using traditional measurement methods, it is impossible to effectively measure the linear and contour dimensions of complex curved and special-shaped structures, which is a weak link in the control of structural manufacturing precision; for super-large-sized structures, the traditional measurement is limited by the difficulty of measurement operations, and the difficulty of manually collecting relevant data increases. , operation safety is also particularly prominent, resulting in incomplete data collection or extremely low efficiency

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