网络协同设计几何模型共享关键技术

o solve the geometric model sharing for Internet-based collaborative design, several key technologies were researched. A distributed system structure of Internet-based collaborative design was presented. A novel approach of reconstructing 3D model towards the local operation of the feature modeling was developed. This approach was based on tour-query of the historic records of feature modeling. The organization mode of dynamic data exchange was developed, which carries out the real-time exchange and consistency of the dynamic data among the different platforms and CAD systems. An Object-oriented Priority-based Optimistic Concurrency Control Protocol in real-time Replication structure (OPOCCPR) was developed. The protocol ensured high efficiency and consistency of sharing model and data at different sites. All the technologies that worked together make sure to realize the real-time and consistency of geometric model sharing for Internet-based collaborative design.