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Singular point identification method and device

An identification method and singular point technology, which is applied in the field of singular point identification methods and devices, can solve the problems of poor versatility and low accuracy of grid division, and achieve the effect of improving accuracy

Active Publication Date: 2021-07-02
ELECTRIC POWER RESEARCH INSTITUTE, CHINA SOUTHERN POWER GRID CO LTD +1
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] Based on this, it is necessary to provide a singular point identification method and device for the problems of poor versatility and low accuracy of grid division in traditional technologies

Method used

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  • Singular point identification method and device
  • Singular point identification method and device
  • Singular point identification method and device

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Experimental program
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Embodiment 1

[0053] figure 2 It is a schematic flow chart of Embodiment 1 of the identification method for singular points, as figure 2 As shown, the following steps may be included:

[0054] Step S110: Select the preset direction grid lines containing the target points to be processed and each triangular surface element to be observed; Step S120: Obtain the direction grid lines of each coordinate axis perpendicular to the preset direction grid lines to obtain the preset direction grid lines The auxiliary planes formed by the grid lines and the grid lines in the direction of each coordinate axis respectively; Step S130: Obtain the intersection line between the auxiliary plane and the triangular surface element to be observed, when the intersection line in the same auxiliary plane falls on the preset direction grid line When the same side of , confirm that the target point to be processed is a singular point.

[0055] Specifically, the STL file is used as the processing object, and the ...

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Abstract

The present invention relates to a singular point identification method and device, wherein, the singular point identification method comprises the following steps: selecting a preset direction grid line containing a target point to be processed and each triangular surface element to be observed; Set the grid lines of each coordinate axis direction of the direction grid lines to obtain the auxiliary planes formed by the preset direction grid lines and the grid lines of each coordinate axis direction respectively; obtain the intersection line of the auxiliary plane and the triangular surface element to be observed, when located at When the intersecting lines in the same auxiliary plane fall on the same side of the preset direction grid line, it is confirmed that the target point to be processed is a singular point. The invention can more effectively identify the singular points, and accurately identify the singular points among the intersection points to be processed to obtain correct intersection point information. There is no need to re-translate the grid lines to obtain new intersection points, and the unified description of singular points in different complex structures is realized, which is more versatile and improves the accuracy of grid division.

Description

technical field [0001] The invention relates to the technical field of mesh division, in particular to a singular point identification method and device. Background technique [0002] As the pre-processing link of various numerical calculation methods, mesh subdivision technology is of great significance for accurate numerical calculation. When using the finite difference method for numerical simulation of casting solidification process and electromagnetic field simulation, it is necessary to divide the three-dimensional solid into hexahedral meshes. STL (Stereolithography: Stereolithography) file is a three-dimensional entity description file, which uses triangular surface elements to simulate the target surface. It is a file format used to represent triangular meshes. Its file format is very simple and its application is very simple. widely. [0003] At present, the relatively mature segmentation methods of STL files mainly include slice scanning method and ray penetrati...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06F30/23
CPCG06F30/23
Inventor 何俊佳罗兵杨瑞刘磊厉天威唐力张福增廖一帆项阳李斌李敏赵贤根
Owner ELECTRIC POWER RESEARCH INSTITUTE, CHINA SOUTHERN POWER GRID CO LTD
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