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Singular point identification method and apparatus

An identification method and identification device technology, which are applied in the field of singular point identification methods and devices, can solve the problems of low grid division accuracy and poor versatility, and achieve the effect of effective identification and improved accuracy.

Active Publication Date: 2018-04-03
ELECTRIC POWER RESEARCH INSTITUTE, CHINA SOUTHERN POWER GRID CO LTD +1
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  • 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 apparatus
  • Singular point identification method and apparatus
  • Singular point identification method and apparatus

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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 invention relates to a singular point identification method and apparatus. The singular point identification method comprises the following steps of selecting a preset direction grid line containing a to-be-processed target point, and to-be-observed triangular surface elements; obtaining coordinate axis direction grid lines perpendicular to the preset direction grid line, and obtaining auxiliary planes composed of the preset direction grid line and the coordinate axis direction grid lines; obtaining intersecting lines of the auxiliary planes and the to-be-observed triangular surface elements, and when the intersecting lines located in the same auxiliary plane fall on the same side of the preset direction grid line, confirming the to-be-processed target point as a singular point. The singular point can be identified more effectively; and the singular point in to-be-processed intersection points is accurately identified to obtain correct intersection point information. The grid linesdo not need to be re-translated to obtain new intersection points, so that unified description of singular points in different complex structures is realized, the universality is higher, and the griddivision accuracy is improved.

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 Applications(China)
IPC IPC(8): G06F17/50
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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