General Automatic Reconstruction Method for Fine 3D Model of Underground Cable Pipe Network

The three-dimensional model of underground cable pipe network is an important infrastructure for the construction and management of intelligent cities. In the face of the current requirements of fine and automatic 3D modeling of underground cable pipe network, there is a lack of general reconstruction methods. In this paper, a general method of automatic reconstruction of fine 3D model for underground cable pipe network is proposed by using the method of reconstruction of underground pipe network based on model base. Methods the pipe network is divided into three structures: simple pipeline, curved pipe and multi-pass connection. Three general key technologies are proposed based on Sweep parametric reconstruction method, and the automatic reconstruction of fine 3D model of underground pipe network is realized. Methods the general modeling technology of pipe bending based on spatial transformation and the general multi-pass connection reconstruction technology based on topological semantics are proposed, and the unified reconstruction of equal diameter bend and the adaptive reconstruction of multi-pass connection are realized. In this paper, the method is verified by experiments based on the data of underground cable pipelines in a certain area. The results show that this method can realize the automatic construction of fine three-dimensional model of underground pipe network and provide basic support for the fine management of underground pipe network in smart city.