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Fast reverse modeling method based on three-dimensional feature extraction

A technology of reverse modeling and three-dimensional features, applied in 3D modeling, image data processing, instruments, etc., can solve the problem of low material cost, achieve the effect of increasing processing time, reducing difficulty, and fast reverse modeling

Pending Publication Date: 2019-01-01
BEIHANG UNIV +2
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Problems solved by technology

[0002] Because of its advantages in residual stress and dimensional accuracy, large structural parts can not only improve performance and quality, but also have the advantages of low material cost and high utilization rate. They are widely used in aerospace, ships, automobiles and other fields. In the field of advanced manufacturing , the traditional method of manufacturing large structural parts can no longer meet the requirements

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  • Fast reverse modeling method based on three-dimensional feature extraction
  • Fast reverse modeling method based on three-dimensional feature extraction
  • Fast reverse modeling method based on three-dimensional feature extraction

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Embodiment Construction

[0030] In order to better understand the present invention, the technical solutions of the present invention will be described in detail below in conjunction with the accompanying drawings and embodiments.

[0031] Refer to attached figure 1 , a fast reverse modeling method based on three-dimensional feature extraction, including the following steps:

[0032] 1. The probe moves to measure the splicing of large structural parts.

[0033] The measuring equipment can only obtain the 3D point cloud of the local area of ​​the large structural part in one measurement, and obtain multiple single-field 3D point cloud data of the large structural part by moving the probe, and obtain the complete 3D point cloud data of the large structural part through splicing. This process is carried out simultaneously with the processing of 3D point cloud data, which shortens the reverse modeling time.

[0034] 2. Delete the noise points of the point cloud, and then use the method of quadratic surf...

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Abstract

A fast reverse modeling method based on three-dimensional feature extraction is proposed, which utilizes the characteristics of large-scale structural parts splicing measurement and realizes the rapidreverse modeling of large-scale structural parts at the same time of splicing measurement. As the splice measuring probe moves, the noise of measuring point cloud in single field of view of large-scale structure is reduced, filter preprocessing is performed, then the 3D features are extracted by using the curvature and normal vector information of point cloud, the point cloud data is segmented, the stitching parameters are calculated according to the segmentation results, and several single-field data are quickly stitched, and the point cloud data processing is synchronized with the stitchingmeasurement of multiple fields of view, so as to realize the rapid reverse modeling, and guide the production processing and process optimization. The point cloud data processing method of the invention not only has high speed, but also retains the three-dimensional characteristics of the point cloud, can realize the simultaneous processing of the point cloud data and the splicing measurement, and meets the requirements of rapid model reconstruction.

Description

technical field [0001] The invention relates to a fast reverse modeling method based on three-dimensional feature extraction, which can be used for fast reverse modeling of large structural parts. The invention belongs to the field of three-dimensional point cloud processing and reverse modeling. Background technique [0002] Because of its advantages in residual stress and dimensional accuracy, large structural parts can not only improve performance and quality, but also have the advantages of low material cost and high utilization rate. They are widely used in aerospace, ships, automobiles and other fields. In the field of advanced manufacturing , the traditional manufacturing method of large structural parts can no longer meet the requirements. Compared with the traditional process of directly machining the overall structural parts from the plate blanks, the method of using precision castings or die forgings as the blanks and a little processing to obtain the overall str...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06T17/00G06T5/00
CPCG06T17/00G06T2207/10028G06T5/70
Inventor 赵慧洁刘成浩姜宏志李旭东
Owner BEIHANG UNIV
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