Design Of The Central Air-conditioning Controller Based On Embedded System

With the popular application of central air-conditioning, the problem how to control central air-conditioning unit effectually is an important issue to many scientific researchers. At present, the 8-bit microcontrollers are always used as the main core processor in domestic central air-conditioning unit controller,the limited resource of main processor lead to unfriendly human-computer interaction, low capability of real-time monitoring, difficult to achieve group-net control, poor energy-saving effect. At the same time, embedded systems and its related technology have been development fastly because of its superior data processing capability and network communication capability in recent years.With the embedded processors becoming more powerful and the software based on embedded operating system more stable, embedded system will promote the process of industrial automation and equipment intelligent.As for the the inherent flaws of the traditional central air conditioning controller, this issue will apply embedded technology into the design of central air-conditioning control system. The following aspects were studied and discussed:â… . Analysis the composition of central air-conditioning system and its control principle, presents the overall design program of central air-conditioning control system based on embedded technology.â…¡. Design the hardware structure with an ARM micro-controller LPC2210 as the core processor, and take a deep research on the structural features of LPC2210, network interface chip RTL8019AS and its network interface, USB interface chip PDIUSBD12 and its interface circuits and so on.â…¢. Discuss the driver design of field control unit, including the transplantation of uC/OS-II, the TCP/IP protocol stack and its realization based on uC/OS-II operating system, the USB driver design based on PDIUSBD12, driven design of serial port, keyboard, LCD, etc.â…£. Analysis the application tasks of central air-conditioning control system based on uC/OS-II and reaseach the configuration of the Field Control Unit.â…¤. Test and analysis the experiment of field control unit.