| With the development of electronic and informational techniques, sound and images techniques, communication techniques, etc., the automation level of buildings is also developed. Concentrated and integrated automation control systems are formed from distributed and separated one. Intelligent Building(IB) flourished on this background, the result of many fields and subjects, which deals with such techniques as architecture, electric, communication, computer, automation control, air-condition and management, etc.On the base of full-scale discussion of Intelligent Buildings (IB), this paper introduces the structure of IB in detail and three main aspects such as the Buildings Automation System (BAS) which is one of the most important three parts of Intelligent Buildings. From the point of system design, a scheme of building automation system based on the application level is brought forward a set of monitoring tables for system is designed, which can help forming control substations. This paper also discusses the hardware and software of the whole system and their configurations, and BACnet?a standard communication protocol for Intelligent Buildings. The supervisory system of every subsystems is set up, and then on the base of function analysis of the supervisory system, the software structures of the system are established. A remote supervisory system is developed and a network structure and communication protocol including Ethernet, TCP/IP, and BACnet?is also proposed for this supervisory system.Finally, in many subsystems comprising the Buildings Automation System, this paper focuses its emphasis on the design of the central air-conditioning control system and presents the control strategy of Distributed Control System and the method of vari-wind-volume control. The management software of the epigyny computer was developed by Visual Basic 6.0, and hyponygy computer is an end controller based on AT89C2051 and 89C51 single chip, which are very cheap and applied. |
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