Method for reverse establishment of BIM model by using three-dimensional point cloud data
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A technology of three-dimensional point cloud and point cloud data, which is used in electrical digital data processing, special data processing applications, instruments, etc.
Inactive Publication Date: 2017-03-08
CHINA CONSTR FIRST BUILDING GRP CORP LTD +1
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[0004] The purpose of the present invention is to provide a method for building a BIM model reversely from three-dimensional point cloud data, to solve the technical problem of directly converting point cloud data into a three-dimensional model; and to solve the problem of reverse modeling engineering of point cloud data in the construction industry
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Embodiment 1
[0028] Embodiment 1 is a method for reversely establishing a BIM model from 3D point cloud data in the smoke exhaust fan area of an engineering equipment layer, see Figure 8 As shown, in the absence of completed technical archives, the construction site is scanned with a 3D laser scanner to present the real situation on the computer, but the editability of the point cloud data is very weak, so the point cloud data must be converted into BIM model, see figure 1 , figure 2 , image 3 , Figure 4 As shown, the steps are as follows:
[0029] Step 1. In the absence of completed technical archives, use a 3D laser scanner to scan the construction site, and use post-processing software to generate point cloud data in *.lass format: After post-processing software processing, remove noise points and Distortion point.
[0030] Step 2: Import the point cloud data in *.lass format into REVIT software to index the data into RCP format.
[0031] Step three, see figure 1 As shown, ...
Embodiment 2
[0038] Embodiment 2 is a method for reversely establishing a BIM model from 3D point cloud data in the channel area of an engineering equipment layer, see Figure 8 As shown, in the absence of completed technical archives, the construction site is scanned with a 3D laser scanner to present the real situation on the computer, but the editability of the point cloud data is very weak, so the point cloud data must be converted into BIM model, see Figure 5 , Figure 6 , Figure 7 As shown, the steps are as follows:
[0039] Step 1. In the absence of completed technical archives, use a 3D laser scanner to scan the construction site, and use post-processing software to generate point cloud data in *.lass format: After post-processing software processing, remove noise points and Distortion point.
[0040] Step 2: Import the point cloud data in *.lass format into REVIT software to index the data into RCP format.
[0041] Step three, see figure 1 As shown, insert the point clou...
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Abstract
The invention provides a method for reverse establishment of a BIM model by using three-dimensional point cloud data. The method is applied to the construction industry; and for seamless integration with a BIM technology, reverse modeling engineering of the point cloud data is tried to be finished in REVIT software. Modeling is not carried by in a point, line and plane mode in the REVIT software, but is realized through positioning by using the point cloud data and importing the point cloud data into the REVIT software successfully through format transformation by combining with professional components such as a base, a structure, windows and doors, curtain walls, stairs, heating and ventilation, electrics and water supply and drainage commonly used in the building and integrated in the software; and in addition, each point in the point cloud data can be identified by the REVIT software, and the point cloud data of a real scene can be transformed into the BIM model. The model can form one-one mapping with the building components in the real world, so that the efficiency of reverse modeling is greatly increased, and a series of construction production activities can be assisted via a means of information management.
Description
technical field [0001] The invention relates to a method for computer-aided modeling of construction engineering. Background technique [0002] The 3D laser scanner generates a detailed geometric image composed of millions of colored points by recording the 3D coordinates, color and reflectivity of the dense points on the surface of the object, which is used to digitally reproduce the existing environment. The data scanned by a 3D laser scanner is called point cloud data. [0003] In the construction industry, although software that automatically recognizes point cloud data and converts it into a 3D model has appeared. According to actual tests, at present, only regular cuboids such as walls, beams, slabs, columns, slabs, etc. and standard cylinders such as water supply and drainage pipes, special-shaped structures (such as curved beams, inclined walls) and accessories of pipes ( Such as elbows, tees), etc. cannot be identified. Due to the existence of noise points and di...
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