网络驱动的协同设计三维几何模型共享技术

Research on Sharing Technology of 3D Geometric Models for Internet-driven Collaborative Design

为解决网络驱动的协同设计三维几何模型共享技术的实现问题,提出一种基于特征流的混合式3D几何模型共享机制,提出了基于多粒度的产品几何模型数据结构描述方法和面向模型局部操作的"游历-查询"特征的历史记录来重构模型的特征建模方法。建立了网络驱动的、基于CORBA/JAVA中间插件的3D几何模型特征信息同步传输和共享平台,CORBA/JAVA平台支持多用户、分布数据管理、消息传输、网络通讯以及可扩展性,通过该平台实现了三维模型的实时传输和共享。

To resolve the problems of sharing technology of 3D geometric models for Internet-driven collaborative design, a synthetical sharing mechanism of 3D geometric models was developed based on characteristic flow of 3D model. A multi-granularity description and data structure of 3D geometrical model was presented. A novel approach of reconstructing 3D model towards the local operation based on tour-query of the historic records of characteristic modeling was developed. A supported design platform based on CORBA/Java was presented, which be of high- performance, scalability, maturity, inter-operability, support for legacy systems and ease of development. Through the platform, all the applications, 3D characteristic models dispersed on the remote heterogeneous systems, can be encapsulated into the objects what CORBA agent objects can manage and find. With all the supported technologies, the real-time transmission and sharing of 3D model on the CORBA/Java platforms was realized.