Research on ECA-based dynamic data exchange in Internet supported collaborative design
基于ECA规则的网络协同设计动态数据交换技术研究

The dynamic data exchange is the key technique to realize the Internet supported collaborative design.But the information of each step designing in collaborative design need to exchange real timely,so many unnecessary data must be contained in dynamic data exchange format.To resolve the problem,the ECA-based dynamic data exchange technique was proposed and the ECA-based Internet supported collaborative design system architecture was constructed.In this technique,the ECA rule of active database(ADB) was adopted to identify the updating of the model entity data by monitoring the transform matrix of geometry graphics.The updated data that satisfied conditions were transmitted to STEP dynamic data exchange and transformed to STEP data format.The data transmitted in Internet was reduced and the possibility of unnecessary data created in updated data was lowered.A locking concurrency control mechanism was implemented to resolve the interactive conflict in multi-users.The prototype system cross-platform Internet supported collaborative design(CISCD) was given to confirm the effectiveness of the dynamic data exchange.