摘 要太阳能是一种取之不尽的安全无污染的绿色新能源，太阳能的分布非常之广，应用也很广泛，而现今社会能源非常的紧缺，许多的能源都已经接近枯竭。这时人类发展利用太阳能等新能源就能缓解能源紧缺的状况并且为未来的新能源的发展打下基础。因此，我们需要积极发掘新能源使用新能源，将太阳能充分利用起来。太阳能热水器就是以太阳能为能源，因为其安全无污染并且成本很低的优势，被广大的用户使用，得以发展。78207

本设计采用STC89C52单片机作为核心控制器，硬件设计模块分为液晶显示、指示灯显示、温度采集、电加热、水位采集、键盘、漏电检测、蜂鸣器报警以及电磁阀驱动。 在水温低于规定的温度时就会启动电加热，对水进行加热，并且将水温显示出来，而当水温达到规定温度时就关断加热电源。而如果在此过程中水箱内的水位没有达到规定的水位时热水器就进行上水。一旦发生漏电就进行保护断电和报警。在系统硬件设计的同时也进行软件设计，包括设计原理和流程图。

本系统设计的太阳能热水器功能非常的齐全，可以适应各种各样天气及环境，还可以做到智能控制和手动控制相辅相成，并且操作简单不繁琐，制作的成本不高，安全性能也比较好，在维修方面也比较方便操作。

该论文有图31幅，表5个，参考文献24篇。

毕业论文关键词：  新能源  太阳能热水器  STC89C52单片机  智能控制   

The solar water heater automatic control system design

Abstract Solar energy is an inexhaustible supply of safe and pollution-free green new energy, solar energy distribution is very wide, is also widely used, and very energy shortage today's society, a lot of energy are nearly exhausted。 Then human development of new energy sources such as solar energy will be able to alleviate the shortage situation and lay the foundation for future development of new energy。 Therefore, we need to actively explore new energy use of new energy, solar energy fully utilized。 Solar water heater is solar energy, because of its low cost and safety advantages of non-polluting, used by the majority of users, to develop。

This design uses STC89C52 MCU as the core controller, hardware design module is pided into LCD, LED display, temperature acquisition, electric heating, water collection, keyboards, leakage detection, alarm buzzer and the electromagnetic valve drive。 When the water temperature is below a predetermined temperature starts electric heating, water heating and water temperature will be displayed, and when the water temperature reaches a predetermined temperature, shut off the heating power。 If the water level in the tank this process does not reach a predetermined level when the water heater proceeds in Sheung Shui。 In the event of leakage protection on power and alarm。 In the system hardware design but also for software design, including design principles and flow chart。

The system design of solar water heater is very complete, can be adapted to a variety of weather and environment, you can also do intelligent control and manual control complement each other, and the operation is simple not complicated, the production cost is not high, safety performance is relatively good, in the maintenance is relatively easy to operate。

The papers Figure 31, Table 5, reference 24。

Key Words： New energy  Solar water heaters  STC89C52 microcontroller   Intelligent control   

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