A lightweight processing method for geometric models in bim for operation and maintenance management

Abstract

The invention provides an operation and maintenance management-oriented geometric model lightweight processing method in BIM, and the method is characterized in that the method comprises the steps: importing a BIM, and creating an operation and maintenance management object component type list; analyzing the BIM model to obtain component parameter information; obtaining a component in the BIM model and the component type, identifying the component type in the component type list of the operation and maintenance management object as an operation and maintenance management object, and otherwise,identifying the component type as a non-operation and maintenance management object; forming a component relation directed graph by taking the operation and maintenance management object as a node and the non-operation and maintenance management object as a directed line segment; and carrying out lightweight processing on the geometric model in the BIM according to the component relationship digraph. According to the method, non-geometric information lossless transmission can be kept, the BIM application requirement in the operation and maintenance stage is met, and building operation and maintenance visualization and integrated management based on BIM are promoted.

Description

technical field [0001] The invention relates to the technical field of building operation and maintenance information, in particular to a lightweight processing method for BIM geometric models oriented to operation and maintenance management. Background technique [0002] Building Information Model (Building Information Model, BIM) is a three-dimensional digital model that describes a building, including professional components such as architecture, structure, electromechanical, and decoration, and their information. It can structurally describe the knowledge structure formed during the design and construction stages; Widely used in the construction phase. The massive knowledge of building ontology stored in BIM is of great value to building operation and maintenance management, such as building space layout, mechanical and electrical equipment assets, and mechanical and electrical system structure; therefore, many researchers have explored the application value of BIM in th...

AI Technical Summary

Problems solved by technology

[0004] (1) To build a BIM model, in order to meet the needs of rapid model modification and fine-grained management, the components are split into small pieces. Tens of thousands of components, 3D geometric model rendering efficiency is extremely low; therefore, it is necessary to combine components to reduce the number of components

[0005] (2) The focus of operation and maintenance management is the electromechanical equipment, key valves, important terminals, etc. that require frequent operation and maintenance, while the attention paid to a large number of pipelines and fittings is low, so pipelines and fittings can be merged; but all pipelines are merged, It will affect the display of the connection relationship between electromechanical equipment, etc., and also affect the realistic effect of component materials, so it is necessary to study intelligent component merging methods

[0006] (3) The BIM model includes a large number of components with complex internal or external structures. For example, a power distribution cabinet includes many details such as buttons, indicator lights, and wire slots, and its geometric model has a large number of triangular faces; The simplified model that expresses the detailed structure of the material map replaces the complex model; however, how to replace it accurately and ensure the lossless transmission of the position, direction and connection with the external pipeline of the equipment still needs to be solved

[0008] Although there are many mature algorithms for the lightweight processing of geometric models, there is a lack of lightweight processing methods for geometric models that specifically address the characteristics of BIM models and the needs of operation and maintenance management. The existing methods are still difficult to meet the needs and require a lot of manual work.

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