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With computer technology, modern communications technology and automatic control technology, the rapid development of embedded technology in the defense, energy, transport, industry and other fields also increasingly widely used, while in terms of intelligent building construction field, or in their respective disciplines academic research, has entered a rapid development period. In today's building automation and control, equipment control complexity and efficiency of the more stringent, 8/16 bit microcontrollers in terms of speed, communication and control complexity are difficult to no longer meet the requirements of building control systems, based on a 32-bit RISC Embedded processor technology in the building controller applications are increasingly widespread, and have achieved good control effect, embedded technology has gradually become the mainstream of the field of building control technologies. This topic is in such a context presented. This article is an in-depth study based on the LPC2318 controller chips, through the building control system to learn, and then through the relevant experiments based on complete. Building controller based on embedded development, including eight modules, namely, control module, power module, temperature acquisition module, humidity acquisition module, interactive module, control module, the detection module, communication module. Master module used ARM7 chip LPC2318 series, the data of temperature and humidity were used AT89C2051H acquisition front-end and STC12C2052AD controller; temperature and humidity acquisition modules are used is DS18B20 and SY-HS-220; PC server programming software is VC6.0 . This paper describes the building automation control systems relevant content and embedded system development, followed by referral is the overall design of the system, including the system's functions, composition and working process, while also briefly describes the system to use to key technologies and development tools. Then from both hardware and software aspects of the development process describes the controller. One after the Yangtze River in Wuhan MALL building automation systems for the research platform, with its VAV central air conditioning system as the research object, by analyzing the characteristics of the central air-conditioning system and operation mechanism, a mathematical model for the control of air conditioning systems theory, design PID controller, fuzzy PID controller, using simulation software MATLAB / SIMULINK this central air conditioning automatic control system simulation analysis, comparing the results of the simulation analysis, the fuzzy PID control strategy is superior to PID control. Meanwhile, for the system uses the APPOGE platform for system debugging, configuration software using SIMENSE CARE write control procedures, to achieve the desired control effect.
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