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Heterogeneous CAD geometric consistency comparison method based on point cloud

A consistent and geometric technology, applied in geometric CAD, design optimization/simulation, etc., can solve problems such as manpower and low efficiency, achieve the effect of improving comparison speed and accuracy, and improving R&D efficiency

Active Publication Date: 2020-04-14
CHINA HELICOPTER RES & DEV INST
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  • Abstract
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Problems solved by technology

Then manually check the key dimensions to ensure the geometric consistency between the converted model and the original model. The whole process requires a lot of manpower and low efficiency.

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  • Heterogeneous CAD geometric consistency comparison method based on point cloud

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Embodiment Construction

[0023] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

[0024] The invention provides a point cloud-based heterogeneous CAD geometric consistency comparison method, the method divides the original CAD model line and surface to obtain point cloud data, and then imports it into the converted or reconstructed CAD model, and calculates the points in the point cloud The minimum distance between each data point and the corresponding line and surface is used to detect the geometric accuracy of the converted...

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Abstract

The invention belongs to the field of computer aided design, and particularly relates to a point cloud-based heterogeneous CAD geometric consistency comparison method. According to the method, original CAD model lines and surfaces are segmented to obtain point cloud data, then the point cloud data are imported into a converted or reconstructed CAD model; and the geometric accuracy of the convertedor reconstructed CAD model is detected by calculating the minimum distance between each data point in the point cloud and the corresponding line and surface. The geometric consistency comparison speed and accuracy of the original model and the converted or reconstructed model are improved, and the model product research and development efficiency is improved.

Description

technical field [0001] The invention belongs to the field of computer-aided design, and specifically designs a point cloud-based heterogeneous CAD geometric consistency comparison method. Background technique [0002] The complex product development process represented by aircraft is a huge system engineering, and all adopt the joint development method to give full play to the advantages of each factory. However, due to the differences in the CAD software platforms used by each factory, at present, most of them use the mutual conversion of intermediate formats or model reconstruction. Two modes for heterogeneous CAD model data exchange. Then manually check the key dimensions to ensure the geometric consistency between the converted model and the original model. The whole process requires a lot of manpower and low efficiency. Contents of the invention [0003] The purpose of the present invention is to provide a method for comparing geometric consistency of heterogeneous C...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F30/15G06F30/20G06F30/12
Inventor 王宏赵国文孙细刚代丽丽
Owner CHINA HELICOPTER RES & DEV INST
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