The purpose of this study is to introduce a kind of solar water heater detection based on the application of solar water heater，achieving to do the better monitoring and controling of the solar water heater. Solar water heater，as one of the most common use of the solar energy utilization. The economic benefit is obviously and the popularization and application is rapidly. According to the characteristics of solar water heater and the requirement of the controller，here shows a design method of the solar water heater intelligent controller based on the clock chip DS12887.

In the analysis of the article about solar water heaters and control of the development and market condition on the basis of distribution, solar water heaters of the controller and the principle of work. The papers finish the control of the hardware and software design. In hardware design of AT89C52 monolithic integrated circuits to control center segments of the whole system. Use of the temperature sensors DS18B20 and sectional form sensors to measure the level as the water, and measurements taken for processing monolithic integrated circuits. Use DS12887 as the clock, to realize the time and date display. Use LCD modules 12864 show that the level of time and date, the display is part of the exchange of one of the man-machine important vehicle. In software design of structure, use modular completed include the program, the level of the inspection or subroutines LCD display design and so on. The main program of the system performs some of the initialization, the temperature of the inspection and control the heating system and the auxiliary signal to show complete the exercise and function testing programs；the water, the measurement and send data to display the functions；a subroutine to complete the water and time functions of the date display；scan a subroutine into the function and the time set.

This paper on the overall design, software, hardware circuit analysis of designs, make the measurement and control of the solar water heater into realize, which has played a significant role in the daily life.

 

Keywords: solar water heater; sensor; DS12887; MCU; FYD12864-0402B