基于AT89S51单片机的智能电热水器的设计--毕业设计

毕业设计

AT89S51

基于单片机的智能电热水器的设计

摘 要

本设计采用ATEML公司生产的AT89S51单片机为核心来设计智能电热水器。本设计也对单片机控制电热水器实现智能化的可能性进行了分析，利用温度传感器、水位检测装置、及模数转换器等来完成本设计。在硬件设计方面，主要对单片机最小系统及其扩展、电源电路、键盘显示及接口电路、模数转换电路、水位及水温检测电路、报警电路进行了详细介绍。还详细介绍了设计中应用到的主要芯片的性能和特点，包括AT89S51、74LS377、DS18B20、ADC0809等。在软件设计方面，采用汇编语言编程，是由于其易于为单片机所识别，执行速度快。最后对软件调试进行了误差分析。

该智能电热水器设计完善，实现方案简单易行。采用软件设计来控制，可以实现智能检测水位及水温，智能加热，并且提高了整机的可靠性及准确性。

关键词：单片机，控制，智能

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ABSTRACT

As technology make a good progress, the applications of single-chip microcomputer become mature all the time. The single-chip microcomputer integrates the various components in a chip, uses the internal bus structure, reduces the connection in different chips, enhanced greatly the reliability and anti-jamming capability. In the development of single-chip microcomputer, due to its excellent cost performance, high integration, small size, high reliability, it has been used as a control center all the time.

Since the birth of single-chip microcomputer, it began to walk into a human’s life, such as washing machines, refrigerators, electronic toys, DMB, which equipped with the single-chip microcomputer, and improved their intelligence, ability. People, who used them, will love them better. The single-chip microcomputer makes human’s life more convenient, comfortable and colorful. As a result, I use single-chip microcomputer to design intelligent electric water heaters.

This paper mainly discusses the intelligent electric water heater how to work. To achieve system goals, in deep analysis of the AT89S51, I made a set of simple and practical control system design. The system is mainly to use single-chip microcomputer to control centers, with specific hardware architecture and the corresponding software design, thus the intelligence of the water heater would become true.

Keywords: single-chip microcomputer, controller, intelligence

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目 录

第1章 绪论 ····················································································································

1.1 选题的背景、目的及意义 ···················································································· 1.2 国内外的研究状况和成果 ···················································································· 1.3 研究设想和实验设计 ····························································································

第2章 硬件系统设计 ·································································································

2.1 方案验证 ················································································································ 2.2 硬件系统设计 ········································································································

2.2.1 电源电路 ···································································································· 2.2.2 键盘/显示接口电路 ·················································································· 2.2.5 报警电路 ···································································································· 2.2.6 模数转换电路 ···························································································· 2.2.7 温度检测电路 ···························································································· 2.2.8 水位检测电路 ···························································································· 2.2.9 AT89S51功能及特性介绍 ·········································································

第3章 软件系统设计 ·································································································

3.1 主程序流程框图 ···························································································· 3.2 键扫描子程序流程框图 ················································································ 3.3 显示子程序流程框图 ···················································································· 3.4 运行程序流程框图 ························································································ 3.5 软件仿真 ········································································································

结论 ······································································································································· 参考文献 ····························································································································· 致谢 ······································································································································· 附录1程序清单 ··············································································································· 附录2 电源电路原理图 ································································································· 附录３智能电热水器原理图

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主要符号表

附录３ 英文翻译 附录4 中文资料

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