Research on Distributed Synchronous CAD Collaborative Design System
The paper explores the key problems in CAD collaborative design of distributed synchronization. According to the characteristics of AutoCAD, the transmission of real-time operation command is replaced by modified underlying database, which improves the tr
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Research on Distributed Synchronous CAD Collaborative Design System Chen Li
Abstract The paper explores the key problems in CAD collaborative design of distributed synchronization. According to the characteristics of AutoCAD, the transmission of real-time operation command is replaced by modified underlying database, which improves the transmission speed of concurrent collaboration and reduces errors of real-time transmission. The paper presents the structure of the whole collaborative design system and expounds some key techniques of it, including the interface, data transmission, conflict elimination, fault disposal, etc. Keywords Distribute collaborative design Conflict elimination Fault disposal
Object database
AutoCAD
91.1 Introduction Distributed collaborative design, as the name indicates, means the product is designed collaboratively by experts distributed in different places [1]. It can be divided into asynchronous interaction and synchronous interaction. The former means designers in different places cooperate at different times, while the latter means designers in different places work simultaneously. Collaboration of designers, who specialize in different fields and work for the same project, is indispensable for CAD design. Currently, most collaborated ways of designers are limited to some simple ways such as online chatting, document transmission, and consultative meeting, which are time-consuming and indirect. Therefore, conflicts among designers may arise and deadline may be postponed. However, synchronous interaction is helpful in resolving conflicts and improving efficiency.
C. Li (&) School of Information Science and Engineering, Shandong Normal University, Jinan, China e-mail: [email protected]
S. Li et al. (eds.), Frontier and Future Development of Information Technology in Medicine and Education, Lecture Notes in Electrical Engineering 269, DOI: 10.1007/978-94-007-7618-0_91, Springer Science+Business Media Dordrecht 2014
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On the research of synchronized collaborative design system, document [2] presents a distributed collaborative working environment based on J2EE platform, while document [3] proposes a distributed Concurrent and collaborative design platform architecture based on SOA, but neither take into account the conflict, fault and other possible issues of collaborative design; document [4] puts forward a cooperative design model of AutoCAD based on operational semantics, but the establishment of a state transition table of operation is complicated. In this paper, according to the characteristic of AutoCAD, this paper perfects collaborative design by replacing the transmission of operation command with the simple modification of underlying database, using objects component of AutoCAD through VBA, which will implement the graphic information real-time transmission of AutoCAD database and improve the transmission speed of Concurrent collaboration.
91.2 Relative Theory 91.2.1 AtiveX Automation ActiveX is a technical approach proposed by Microsoft, which at
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