94 results about "Building modeling" patented technology

A semi-automatic reconstruction method of 3-D building models using building outline segments is introduced. The core technology of the present invention is called the “Split-Merge-Shape” algorithm. The Split and Merge processes sequentially reconstruct the topology between any roof-edges of the buildings and then reform them as enclosed regions. The Shape process uses height information and consecutive-coplanar analysis to determine the shapes and heights of the roofs. After generating polyhedral building models, prismatic building models can also be generated by using a semi-automatic procedure. An existing digital topographic map of buildings can be directly used to reconstruct their 3-D models without any excess stereo-measurements. In addition to cost reduction, high efficiency, high quality, and minimization of manual operations, the integration of photogrammetric mapping with 3-D building modeling in one procedure is possible, which is the most cost-effective approach for 3-D mapping.

The invention relates to a construction engineering data modeling method based on the BIM (Building Information Modeling) technology. The technical scheme of the construction engineering data modeling method comprises the steps of: primary modeling: carrying out visual geometric modeling design on a project through Rhino software, and determining a building shape scheme; secondary modeling: finishing the informatization definition of a three-dimensional primitive in Revit software, wherein the informatization definition of the three-dimensional primitive includes building modeling, structure modeling and equipment modeling, and the building modeling, the structure modeling and the equipment modeling are simultaneously carried out and are mutually associated; model optimization: on the basis of a software analysis platform, carrying out analogue simulation on the model finished in the second step, and finally finishing the further optimization of the model; and integrating a building data model into a BIM information operation platform. The construction engineering data modeling method overcomes the problems that traditional AutoCAD (Computer Aided Design) software information transmission has the defects of losses or distortion, poor cooperativity, lack of equipment data information and the like and the defect that a simulation test can not be carried out. Data on a traditional drawing and text is imported into a three-dimensional model, resources are integrated through the integrated data model, an interactive cooperative capability is good, engineering quality is improved, construction cost is lowered, a construction period is shortened, and safety is improved.

A method for quickly modeling three-dimensional urban buildings for traffic environmental pollution simulation is characterized in that the specific steps are as follows: step 1, building data of a simulation area are derived through a digital urban software; 2, reading the building data through program language software and optimizing the building shape data characteristics, so that the buildingshape data can be obtain with better quality on the premise of ensuring the main shape characteristics of the building; 3, according to the building shape data and the boundary condition of the computational fluid dynamics simulation, designing a computational area of the numerical simulation; 4, generating a corresponding building through a modeling software script language, and calculating a modeling script of that domain. The method has the advantages of solving the problem of rapidly generating a building geometric model in the process of simulating the atmospheric pollution diffusion in areal urban scene, improving the efficiency and accuracy of the urban three-dimensional building modeling, and simplifying the pretreatment process of the urban atmospheric pollution diffusion simulation.

Described herein is a process and system for constructing three-dimensional (3D) representations of buildings. The 3D representations of buildings are semantic models that include roof nodes, roof edges, as well as roof faces with associated properties (e.g., pitch, azimuth). The system receives a 2D representation such as a roof outline including nodes connected by edges and associated data such as a height value, a pitch value, an independent structure, or a dependent structure. The system determines height values where a building structure changes. The system propagates a wavefront representing a cross-section of the building to the height values to generate 3D model edges. The 3D representation is generated based on the 3D model edges. The system can create 3D representations of buildings including roof structures of arbitrary complexity and can create representations of dependent roof structures such as dormers.

The present invention concerns rustication forms or moldings having covering (overlay or wrapping) that alleviate problems associated with concrete slab curing. The present invention also concerns methods for forming rustication in concrete walls. The present invention comprises a rustication form substrate, wherein all or portions of the surface exposed to the curing concrete is covered with covering or layering, and only portions of surfaces not exposed to the curing concrete is covered.

The invention discloses a directional layered household diagram expansion method, which comprises five steps of extracting the outer contour of the layered household diagram, identifying the outdoor contour points of the child households, classifying and expanding the vertices of the child households' rooms, stretching the top floor of a building, and modeling a three-dimensional building. A method for construct an equidistant parallel line is used to expand a hierarchical household diagram, the directional space expansion and stretching of complex vector planar graphics are realized, To solvethe problems of inaccurate nesting of 3D building model and inclined model and the uneven hierarchy between different floors caused by artificial editing and expansion, optimize 3D visualization effect, improve 3D building modeling efficiency and reduce the consumption of human and financial resources, it has good application value in practical application.

The invention discloses a BIM-based ground fresh air and floor heating system pipeline assembly and an intelligent control method, and belongs to the technical field of building modeling intelligent control. The method comprises the following steps of establishing a ground fresh air and floor heating system BIM model; integrating with a project building and electromechanical BIM model, and correcting a three-dimensional model of the ground fresh air and floor heating system; deriving the size of a reserved hole of the system; exporting a pipeline buckle detail list; exporting a system construction drawing and a material processing detail list; installing and accepting the system; collecting environmental data; transmitting the environmental data to a BIM server; converting the environmental data into a three-dimensional data model and displaying the three-dimensional data model in a display screen; and intelligently controlling the intelligent control system through the three-dimensional data model. According to the method, the installation accuracy and efficiency of the system can be improved, reworking is avoided, and a more comprehensive, more efficient and more intelligent system monitoring and control method is provided for the ground fresh air and floor heating system.