The Research Of Integration Technology And The Design Of Bus Control System Based On Large And Medium-sized Central Air-conditioner System

With the development of bus technology ,it has become the main technology which can replace traditional distribution control, and achieve real-distributed control; and system integration is the demand of information age, also is the key of networking control. Thus in recent years, the researches of bus control technology and system integration technology and their applications have already been a focus on academic and engineering fields.Being the most important part of building automation system, central air-conditioning system is an extremely complex system, which has numerous equipments, functional differences, and extensive spread. The research of central air-conditioning system control and integration, as well as data exchange and integration between the system and the higher information network, naturally became one of the first choices in building antomation system researches. Therefore, the introduction of bus control technology into the large and medium-sized central air-conditioning systems, and to accomplish computer integration management system (CIMS) has a very realistic significance. Particularly, the introduction of advanced technology into architecture industry whose technology is lagging has a positive effect.A lot of work and unique contribution were expounded logically in the thesis which were made by the author who constructed a central air-conditioning bus control systems and its CIMS, and fully embodied the author's designing thinking and innovation in the whole process. Including : first, the features of several bus technologies were analysed by the author which have been applied broadly at present, particularly the capability and characters of Lonworks bus technology which has been chosed by the author. Including LonTalk communication protocol and the structure of network addresses, communication services, priority and conflict resolution, information confirmed. Additionally, the network operation system, service and management of Lonworks bus technology were discussed in the thesis. The designer's perception and comprehension who chose the system products determined the quality of control system; second, on the base of analyzing the engineering feasibility , the thesis constructed the building central air-conditioning control system based on Lonworks technology, including system architecture, control network's software and hardware's configuration, design and debugging, especially has made a lot of contribution in the...