AT89C51单片机即热式电热水器控制系统的设计
Water Heater
Abstract
Electric Tankless Water Heater is a substitute of the traditional electric
water heater. But it is much more practical, safer, more convenient, and
more energy-efficient. This article, based on the principle of the Electric
Tankless Water Heater, has completed the design and simulation of the
control system on the basis of the AT89C51 MCU. According to the principle
of the Electric Tankless Water Heater, I improved the previous controller
circuit. The corresponding control software is programmed so as to design
a new, simple and lower cost water heater. At first, the article introduces
the principle of the Electric Tankless Water Heater. Then based on the
top-down approach, the control system is pided into temperature
detection, key input, power supply, the LED display, buzzer automatic. Then
according to the function of each module, the hardware circuit and the
software are developed. Finally the whole control system is connected. Then
I carried on the simulation test, to study whether the performance meet
the design requirement.
Keywords Electric Tankless Water Heater AT89C51 Control System
目 次
1 引 言 1
1.1 选题的背景及意义 1
1.2 本文所作的工作 1
2 即热式电热水器概述 2
2.1 即热式电热水器的发展及现状 2
2.2 即热式电热水器的基本工作原理 3
2.3 系统总模块概述 4
3 系统硬件设计 5
3.1 核心芯片概述 5
3.1.1 芯片 AT89C51 . 5
3.1.2 双向可控硅. 8
3.2 系统硬件电路设计 9
3.2.1 加热控制电路 . 9
3.2.2 过零检测电路 10
3.2.3 温度检测电路 10
3.2.4 键盘和显示接口电路 11
3.2.5 报警电路 13
4 系统软件设计. 14
4.1 单片机 C51 语言概述 . 14
4.2 主程序 . 15
4.3 显示扫描子程序 . 16
4.4 按键扫描处理子程序 . 17
4.5 加热控制程序 . 18
4.6 温度检测程序 . 21
5 软件的调试与仿真. 23
5.1 仿真工具介绍 23
5.1.1 Keil μ Vision3 简介 23