Virtual assembly system and method based on CAD and measured data fusion model
A technology of measured data and virtual assembly, which is applied in image data processing, electrical digital data processing, special data processing applications, etc., can solve the problems of geometric association, topology relationship, lack of process information, and restrictions on the accuracy and reliability of virtual assembly, and achieve Effects of improved assembly accuracy and reliability
Pending Publication Date: 2019-01-04
DONGHUA UNIV
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However, its lack of geometric association, topological relationship, and process information is also an important factor restricting the accuracy and reliability of virtual assembly.
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[0028] Below in conjunction with specific embodiment, further illustrate the present invention.
[0029] Aiming at the current situation that the accuracy of virtual assembly technology for large and complex structural parts is insufficient and the reference value is reduced, this embodiment proposes a virtual assembly system based on the fusion model of CAD and measured data, such as figure 1 As shown, it mainly involves 3 models and 1 method: assembly theory integrated information tree model M 1 , Assembly essential point cloud model M 2 , Assembly element information integration model M 0 , and (M 1 ,M 2 ) to M 0 The fusion integration method.
[0030] Assembly theory integrated information tree model M 1 : Integrates effective assembly-oriented information in the ideal CAD model, including: ①Part-level information set, that is, the geometric information of each Part; ②Assembly-level information set: such as coincidence, parallel, coaxial, etc.; ③Assembly relationship...
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The present invention provides a virtual assembly system and method based on a CAD and measured data cointegration model, which integrates the assembly theory integration information tree model and the assembly essentialization point cloud model into the same spatial domain through instantiation and further cointegration to obtain the assembly element information cointegration model. The integrated information tree model of assembly theory is the integrated information tree model of component level information set, assembly level information set, and the ideal assembly relation information setof corresponding parts in the ideal CAD model. The essentialized point cloud model of assembly is the essentialized point cloud model after processing the product point cloud data obtained from three-dimensional measurement. The invention obtains a co-integration model integrating effective information of the two models through co-integration optimization of the ideal CAD model and the actual measurement model, and the virtual assembly operation on the basis of the model can obtain the information directly guiding the actual assembly work, the assembly accuracy and the reliability are improved, and the invention is suitable for large-scale popularization and use.
Description
technical field [0001] The invention relates to a virtual assembly system for large and complex structural parts, in particular to a high-precision virtual assembly system based on an information fusion model of an ideal CAD model and a measured data model. Background technique [0002] Virtual manufacturing technology is one of the important components of intelligent manufacturing technology, and virtual assembly technology in the virtual manufacturing process is also a key part. Virtual assembly mainly refers to the use of computers and related human-computer interaction equipment (operating equipment, visualization equipment, etc.) Elements, simulated parts, etc. are assembled, and the simulated assembly experience and knowledge are used to provide auxiliary guidance for the assembly of the physical model. [0003] However, judging from the overall progress of research at home and abroad, virtual assembly is relatively weak compared to other virtual manufacturing links. ...
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Login to View More IPC IPC(8): G06F17/50G06T19/00
CPCG06T19/006G06F30/20Y02P90/30
Inventor 鲍劲松李志强殷士勇
Owner DONGHUA UNIV