A layer classification method for converting architectural drawings into a three-dimensional BIM model

Abstract

The invention discloses a layer classification method for converting architectural drawings into a three-dimensional BIM model, comprising the following steps: a, importing CAD architectural drawingsinto BIM modeling software, and converting graphic element information in CAD architectural drawings into a basic graphic element information database and a text information database; B, retrieving the layer information in the CAD architectural drawings, traversing the pretreated CAD architectural drawings, and putting the basic graphic elements of the same layer into a collection; C, taking the image layer to be identified as the target image layer, and sequentially calculating the total matching degree score of the image layer data set of each image layer, thereby obtaining the target imagelayer; carrying out the next round of matching degree score calculation on the layer data set of each layer until all the target layers are obtained; D, after obtaining all the target layers, identifying and modeling on the designated target layers. The invention automatically classifies layers of CAD architectural drawings and improves the efficiency of recognizing and reconstructing 3D BIM models of CAD architectural drawings.

Description

technical field [0001] The invention relates to the technical field of building information models, in particular to a layer classification method for converting building drawings into three-dimensional BIM models. Background technique [0002] In the construction industry, building information modeling and management (BIM) is widely recognized as a new tool that can improve production efficiency and delivery quality. BIM provides an engineering project with a multi-dimensional real-time synchronous visualized architectural model, and at the same time brings multi-party collaboration and unified management methods throughout the life cycle of the project. [0003] At present, domestic BIM technology has just started, and the country has not issued a complete BIM delivery standard. Most projects still use traditional construction drawings as design delivery; on the other hand, the complexity of BIM software operation prevents many construction units from Internal adaptation,...

AI Technical Summary

Problems solved by technology

However, this algorithm is computationally expensive and the accuracy is not impressive enough.

At present, there are several softwares at home and abroad that can automatically convert CAD drawings into BIM models, such as Handaz in Egypt. These softwares can more accurately identify the components in CAD drawings, but these software require manual selection of building components by remodelers. Confirm its layer and need to enter some parameters such as height and size information

Therefore, the problem with the mold-turning software on the market is that the degree of automation is not high; and these software can only recognize building plans, but not elevations, so some data needs to be entered manually

[0005] In summary, at the current stage, whether it is theoretical research or commercial software, the technology of converting CAD drawings into BIM models has a high degree of recognition accuracy, recognition time and automation degree. Each has its shortcomings

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