英文摘要 | The development of high technology such as computer, Fieldbus, OPC, INTERNET and ERP, gives the opportunity to the industry automation domain in China~ Faced with both the challenge and the opportunity, based on the requirement of the process control field in our country, ERC of Integrated Automation Technology, Institute of Automation, Chinese Academy of Sciences developed a new generation of automation system---Multi-Fieldbus Integrated and Internet based Automation System, MFIAS for short. This thesis is just based on the research work the author participated in the MFIAS project. What the exact subject the author participated in is the core part of the MFIAS——RTDP, that is "Real Time Data Platform". So the thesis is mainly to introduce the design and implementation of RTDP. Meanwhile, As the important role of the OPC technology in RTDP, the thesis gives the detail discussion to OPC. The dissertation is divided to five chapters, which include: 1. The development background of the MFIAS system is discussed. The Fieldbus, Internet and OPC technology are also simply introduced. Then explains the overall frame of MFIAS and the core part of MFIAS---RTDP. Finally introduces the arrangement of the dissertation. 2. The OPC technology specification, which include OPC Data Access, OPC Alarm & Event and OPC Historical Data Access, is briefly introduced. The background of OPC, the change brought by OPC and COM/DCOM are also introduced. 3. The overall design and the data structure of RTDP are introduced. 4. Detailed explanation for the design of the RTDP Run Stateo The two most important key technologies, multi-thread technology and the implementation of OPC interfaces, are stressed. 5. The implementation of MFIAS is introduced. At last, the summary of the dissertation is given, and besides, some beneficial suggestions to RTDP are listed. The early version of MFIAS was exhibited in International Fieldbus Exhibition 2000' in July 2000 and won high evaluation. On October 19, 2000, MFIAS passed the final approval by the Chinese Academy of Sciences. The next aim of MFIAS is to be commercial software. |
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