Abstract
Building construction is the traditional and modern computer technology, information network technologies and testing sensing technology and the automatic control techniques of integration. Building automation system is comprehensive systems composed of the central computer and various control subsystem. It uses sensing technology, computer and modern communication technologies, including the heating and air-conditioning ventilation, elevators, monitoring and surveillance, water and drain monitoring, electricity transformation and prepare for the monitoring, automatically control the fire alarm and public security fire control keenly promoted synergies, such as the fully automated system of the integrated management. Each subsystem may be information between the interconnected and winding, for building owners, managers and provide the most effective information services and an efficient and comfortable and convenient and secure environment. BA systems are generally used to control and centralized monitoring and management is key sensing technology, and interfaces control technology and management information system. This design adopts the Johnson's company metasys system in an exhibition hall for automatic control, the ddc directly with the premises of the relevant facilities to connect to the system of monitoring.
Keywords: BA system;Johnson controls;DDC;Automatic control