湖大考研暖通英语14.ppt

Professional Englishfor Built Environment and Service Engineering Lecturers: Zhou Jin 周晋 Tel(O): 0731-8821312-202 Mobile: Email: zhoujin_y@263.net   Unit Fourteen Control and Building Automation System What is an intelligent building? Schematic Diagram of an Intelligent Building System Up to now, there has not been a universally accepted definition for an Intelligent Building. Most existing definitions of IB around the world centre on the need for a building to be suitable for the occupants to work and live in safely, comfortably, effectively and efficiently. “Intelligent building is something that make stupid people feel not as stupid as they are”. Intelligent Building can bring us Reduced Resource Consumption Both home and building technology offer tremendous potential savings through intelligent controls. Optimized Convenience and More Comfort Apart from minimizing consumption costs, private home owners will be interested in higher levels of convenience, safety and security. Smart Home is an integration of various systems at home such as security, home automation, lighting control, CCTV and entertainment system which is coordinated by a smart home controller and controlled by users using various centralized command interfaces such as a touch screens, keypads, universal remote controllers, internet browser, telephone, and even your LCD TV screen. Smart Home Systems CCTV: Closed Circuit Television CCTV: China Central Television On/off Control The control device can be positioned only to a maximum or minimum state (e.g., on or off). Because On/off control is simple and inexpensive, it is used extensively for both industrial and commercial control. A typical home thermostat that starts and stops a furnace is an example of On/off action. Floating Control Dead (neutral) zone 盲区 停滞区 In floating control, the controller can perform only two operations— moving the controlled device toward either its open or closed position, usually at a