An explosion view generation method based on collision detection

An exploded view and collision detection technology, applied in the direction of instruments, geometric CAD, calculation, etc., can solve the problem of low efficiency of the exploded view generation method, and achieve the effect of universality, improved efficiency, and natural explosion separation process

Active Publication Date: 2019-02-22
CHANGAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is to provide a method for generating an exploded view based on collision detection to solve the problems of low efficiency of the method for generating an exploded view in the prior art

Method used

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  • An explosion view generation method based on collision detection
  • An explosion view generation method based on collision detection
  • An explosion view generation method based on collision detection

Examples

Experimental program
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Embodiment 1

[0045] This embodiment discloses a method for generating an exploded view based on collision detection, and the method includes the following steps:

[0046] Step 1. Obtain the 3D model to be disassembled;

[0047] In this step, the 3D model to be disassembled obtained by CAD, 3DMax and other software is converted into .fbx format and imported to a 3D platform, such as Unity and other platforms.

[0048] Step 2, obtaining the three-dimensional information and the area of ​​the bounding box of each part in the three-dimensional model to be disassembled;

[0049] In this step, the bounding box may be an AABB bounding box, a bounding sphere, an orientation bounding box OBB, a fixed orientation convex hull FDH, and the like.

[0050] As a preferred implementation, the OBB bounding box determines the size and direction of the box according to the geometric shape of the object itself, and the box does not have to be perpendicular to the coordinate axis. In this way, the most suita...

Embodiment 2

[0094] This embodiment discloses a specific generation process of an exploded view based on collision detection, which includes the following steps:

[0095] Step 1. Obtain the 3D model to be disassembled under the Unity platform;

[0096] In this step, use 3DMax software to convert the three-dimensional model into a target format file, and name it Tocus.fbx, the model is as follows figure 2 shown.

[0097] Step 2. Obtain the center point of the bounding box and the area of ​​the bounding box of all parts in Tocus;

[0098] In this step, each part in the model has a specific positional relationship and specific positional information, and has OBB bounding box information in the three directions corresponding to X, Y, and Z. This information is mainly used to determine the maximum central datum part and the direction of explosion movement, such as image 3 As shown, the bounding box diagram of some components and the corresponding positional relationship of the components. ...

Embodiment 3

[0104] This embodiment discloses a comparison of the effects of a method for generating an exploded view on the Unity platform.

[0105] Comparing the exploded view generation method provided by the present invention with that of LI W, AGRAWALA M, CURLESS B, etc. in the document Automated generation of interactive 3D exploded view diagrams, the objects to be dismantled are all classic turbine models.

[0106] Existing methods obtain such as Figure 6 The shown exploded view takes 1010s, and the method provided by the present invention obtains as Figure 7 The shown exploded view is real-time, and by comparing the two exploded views, it can be seen that the exploded view obtained by the method provided by the present invention is more hierarchical, so the method provided by the present invention is not only for coaxial and containing relationships. The model is feasible, and in the visual effect of the exploded diagram, the separation is more refined.

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Abstract

The invention discloses an explosion view generation method based on collision detection, comprising the following steps: acquiring a three-dimensional CAD model; obtaining the OBB bounding box area of each part; carrying out rough separation by using the spatial relative position relation; Some parts were re-separated by collision detection. that present invention is use to present assembly relationships in industrial design, The algorithm constructs the bounding boxes of each mechanical part, determines the separation order and direction of the parts according to the geometric algorithm of the size and relative position of the bounding boxes, optimizes the separation operation by means of collision detection with rotation constraint, and finally obtains the explosion view with physical effect. The explosion view generation algorithm based on physical simulation provided by the invention utilizes a virtual reality development platform, and the final test scene can be mapped to the real world, so that the test result is more vivid.

Description

technical field [0001] The invention relates to a method for generating an exploded view, in particular to a method for generating an exploded view based on collision detection. Background technique [0002] Exploded view can construct a real three-dimensional representation by splitting the parts in the assembly layer by layer in a certain order, direction and distance. Compared with section views, plan views, perspective views, etc., exploded views can more clearly display the shape information of internal parts and their associated relationships, assembly sequences and installation paths. As a visual carrier of assembly sequence, it has been used in many fields such as machinery, manufacturing, testing, and maintenance. [0003] At present, domestic and foreign modeling software such as UG, Solidworks, etc., all have the function of generating exploded views, but the degree of automation of generating exploded views is not high, and the generation effect on complex assem...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F17/50
CPCG06F30/15
Inventor 柳有权李婉
Owner CHANGAN UNIV
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