Compression method and system for BIM (Building Information Modeling) file of transformer substation

Abstract

The invention discloses a lossless compression method for a transformer substation BIM three-dimensional model file, and the method comprises the steps: importing the transformer substation BIM three-dimensional model file in a GLTF format, carrying out the disassembly analysis according to nodes, obtaining a character set of each three-dimensional model component, carrying out the fuzzy matching of the character sets of all three-dimensional components, and obtaining a three-dimensional model file; calculating the similarity of fuzzy matching of each three-dimensional component to obtain at least one three-dimensional component group of which the similarity exceeds a preset threshold value; displaying the groups of the three-dimensional components; and in response to a selection operation of a user, determining a three-dimensional component group needing to be compressed, and carrying out association multiplexing on geometric information of the three-dimensional model components in the group to obtain a compressed standard three-dimensional model file. The invention further discloses a corresponding system. By implementing the method, lossless compression can be performed on the BIM model file of the transformer substation, and the method has the advantages of high compression rate, small distortion and manual control of the compression rate.

Description

technical field [0001] The invention relates to the technical field of substation BIM model informatization, in particular to a compression method and system for substation BIM model files. Background technique [0002] Building Information Modeling (Building Information Modeling, BIM) is a multi-dimensional model information integration technology developed on the basis of computer-aided design and other technologies. , transmission and coordination functions. BIM technology is widely used in fields such as infrastructure, operation and maintenance, and cost because of its visualization, coordination, simulation, optimization, and drawing capabilities. However, the 3D model is composed of a large amount of geometric information and connection information. The original 3D design file has many triangles and large file size, and there are problems such as difficulty in sharing and sharing, difficulty in version unification, and poor coordination. Especially for power grid ass...

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Problems solved by technology

However, the 3D model is composed of a large amount of geometric information and connection information. The original 3D design file has many triangles and large file size, and there are problems such as difficulty in sharing and sharing, difficulty in version unification, and poor coordination. Especially for power grid asset-intensive enterprises, 3D The smooth interaction and efficient sharing of models are problems that need to be solved urgently

Although the currently used 3D formats such as rvt and GLTF can compress the original 3D files to a certain extent, the degree of compression is far from the level of smooth application of web pages.

[0003] At the same time, the compression methods for these 3D formats in the prior art are mainly surface reduction and collapse, but there is a problem in surface reduction compression: if the surface reduction is too small, the volume compression of the 3D model is limited, and it cannot support the smooth application of the web page. For example, the original file of the BIM model of an indoor substation is about 800M. If you want to implement in-depth application on the web page, you need to compress it to about tens of M. The degree of compression needs to far exceed the industry standard; , such as reducing the surface from a circle to a polygonal rhombus

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