The Research Of System Integration And The Applications Of Fieldbus Control Technology In Building Automation System

So far as the developing tendency of the control, the fieldbus technology has become the main one which can replace traditional "distribution" control, and achieve real-distributed control; and the system integration is the demand of information age, also is the key of networking control. Thus in recent years, the research of the fieldbus control technology and the system integration technology, as well as their applications, has already been a focus on academic and engineering fields.The building automation system is an extremely complex system, which has numerous equipments, functional differences, and extensive spread in position. The researches of its control and integration, including the data exchanging and amalgamating between the system and its higher information network, naturally become one of the first choices in building antomation system researches. Therefore, introducing the fieldbus control technology into the building device supervisory and control systems of the large and medium-sized buildings, and accomplishing the computer integration management system (CIMS), have the very realistic significance. Particularly, the introduction of advanced technology into the construction industry whose technology is relatively lagging has a positive effect.The thesis expounded researches made by the author who constructed a building device fieldbus supervisory and control system and further its CIMS, and also embodied the author's designing thinking in the whole process as following : CD analysed the features of several fieldbus technologies which have been applied broadly at present, particularly in detail the the features and characters of ControlNet fieldbus chosed by the author, including its communication mode, arbitrage way and its network system structure etc; (2) analysed the system compositions and their fundamental supervisory contents of the controlled object------the building automation system. Emphatically, the building central air- conditioning control subsystem, and its working principle, system characters, and the relative supervisory law; ?Basing on a true engineering project, discussed the basic requirements and different frames for constructing the control network of the building automation system, and the feasibility of applying ControlNet fieldbus technology to building automation supervisory system, with these discusses, author constructed the building automation system and its central air-conditioning control subsystem adopting ControlNet fieldbus, including the system frame, the control network hardware disposition, and the MMI software programming of controllers, the system supervisory and control using the configuration software, as well as establishing the system communication by the communication software, etc; ? expounded the concept, the target, and the effect, also the basic content and the principle, particularly in detail the methods often used of the system integration, especially, OPC/(DDE) software integration method adopted in this engineering. Finally, accomplished the integration engineering design of the building automation supervisory system with the technology of ControlNet fieldbus, including the IBMS frame and the configuration of the system softwares;? based on the analysis in detail of configuration software RSView32, accomplished the whole configuration design of the central air-conditioning supervisory subsystem of this building, including the configuration supervisory human-machine interface design, which is lively, friendly, functional and fulfills engineering requirements, using Visual Basic6.0 software tool.The thesis has definite reference value for theoretical research and engineering application of the fieldbus control technology and system integration technology.