The Research And Application Of New Solar Control System

With the improvement of living standards and awareness of environmental protection, the solar water heater has gradually entered into thousands family with its many popular advantages. However, at present, the solar water heater system has been mainly used for the family units which have relatively low intelligent ability, simple function, unavailable network control and remote monitoring function, and that poor efficiency of the solar energy collector.For these reasons, in this paper, based on fuzzy PID control algorithm and wireless sensor network (WSN) technology, with S3C2410 microprocessor based on ARM9 kernel as the core, the solar energy collection system with solar heating and electric heating is designed for the whole buildings and provide hot water for all users in the building. The control system includes main-controller and slave-controller, and the main-controller as well as the slave-controller constitutes the master-slave multi-motor wireless sensor network. This article firstly introduces the development situation of solar water heater system at home and abroad and the constitution, principles as well as the design scheme of the solar energy collection systems, and then the controller is designed from the aspect of hardware and software.The hardware design includes main-controller and slave-controller. The design of peripheral hardware circuit in the main-controller includes power circuit, memory circuit, XE1205 wireless transmission circuit, Ethernet interface circuit, water level detection circuit, temperature detection circuit, keyboard input and alarm circuit, reset circuit, output control circuit and so on. The hardware circuit design of slave-controller system is made up of XE1205 wireless transmission module, storage module, output control module, remote controlled receiving module and so on.The software design consists of main-controller and slave-controller. The first thing of main-controller software design is to set up the controller software platform, namely, the establishment of Linux operating system, which comprises the following four components: the establishment of cross-compiler environment, the transplant of system bootloader, the transplant of Linux operating system kernel and the establishment of file system. Then the applications of operating system platform are written, including Qt structures of the development environment and the written of concrete application program. The software design of slave-controller mainly is used C language for communications program, output control program, real-time display program etc. between the main-controllers.Finally, this paper makes an analysis and research on the fuzzy PID control algorithm, which uses two input three output fuzzy controller to confirm the universe of discourse of the input and output variables and the membership function, provide the PID parameters-self-adjusting rule, and accomplish the design and the experimental simulation of the fuzzy PID control algorithm.