Research On 3D Modeling Method Of Building Pipe Network Based On Construction Drawing

The building pipe network is the general term for various pipeline systems that provide users of buildings with life and work services.It is a necessary part of modern architecture and covers the pipelines,pipe sections,and various facilities and equipment of water supply and drainage,ventilation,fire protection,and electrical engineering in the buildings.In the process of meticulous management of smart cities,it is inevitable to realize the information management of building networks.However,current methods for 3D modeling of pipeline networks do not have information integrity in terms of data sources,and they are inefficient in modeling methods and cannot be applied to the 3D modeling of building pipeline networks.This article is based on the design specifications and drafting standards for building pipe networks.It uses data-rich building pipe network construction drawings as data sources,and summarizes the characteristics of the drawing and drawing features of construction drawings of construction pipe network.Based on this,the pipe network information is extracted to build a three-dimensional model,which provides an effective support for the refined management of the building pipe network.The research content and conclusions of this article mainly include:(1)Method for Building pipeline network entities and semantic information acquisition based on table information extractionThis paper proposes a method for acquiring entity and semantic information based on symbol legend table information,which is used to solve the difficulties in semantic extraction due to numerous types of construction drawings for construction network.By using the consistency between the symbol of the legend table and the pipe network object symbol in the drawing,the building pipe network entities are extracted through similarity matching,and the semantic information is obtained from the legend table.Experimental results show that the entity and semantic extraction method based on symbol similarity matching in this paper has higher accuracy and fault tolerance for different symbol recognition.(2)Method for obtaining attribute information of building pipe network object based on annotation extractionThis paper proposes an attribute information retrieval method based on annotation information extraction to solve the problem of lack of attribute information extraction methods for building pipe network construction drawing with rich attribute information.Based on the mapping requirements noted in the National Standards and Drafting Standards,the knowledge of the entities and attributes of the building management network is summarized,driven by the rules,and the annotation extraction method is designed to obtain and analyze the attribute information contained in the annotations.Experimental results show that the attribute extraction method of this paper has better performance for the extraction of other types of annotation information,such as elevation annotation and lead annotation.(3)Method for 3D Modeling Method of Building Pipe Network based on multigraph information synthesisThis paper proposes a spatial relationship construction method for multi-graph information synthesis,aiming at the incomplete expression of spatial relationships in a single drawing in construction drawings of building networks.Based on the drawing method of pipe network construction drawing,using the features of complementarity and mutual confirmation of plan and system map information,the spatial information is extracted and the spatial relationship is constructed.The experimental results show that this paper is based on the spatial relationship construction method of multi-graph information synthesis,which can effectively solve the problem of insufficient space expression caused by the occlusion of sight lines in the floor plan,and realize the construction of a three-dimensional model of building pipe network.The research results show that the method of 3D modeling for building pipe network based on construction drawings overcomes the difficulties in extracting building pipe network information and meets the needs of fine management of building pipe network,providing a highly efficient 3D model for building pipe network.,convenient construction method.