基于proteus的热式热水器温度控制系统的仿真研究毕业论文

本科生毕业设计（论文）资料

第一部分 设计说明书

基于proteus的热式热水器温度控制系

统的仿真研究

摘 要

热水器在工业生产和家庭生活中的应用是非常普遍的，而热水器的核心技术之一就是温度控制方面，也就是说温度控制器的技术对热水器的发展起着至关重要的作用。所以温度控制器的研究对于提高热水器产品的质量，是具有很重要的现实意义的。

本课题主要针对热式热水器中温度控制的特点及实现准确温度控制的意义，设计了一种基于单片机的控制系统，整个系统的设计内容包括硬件和软件两个部分。硬件电路主要以AT89C51单片机为微处理器，详细设计了温度信号采集电路，温度数码显示电路，键盘设置温度电路，报警电路，光耦隔离输出电路，模拟加热电路。软件部分主要针对加热装置的控制模式进行了编程。温度传感器DS18B20采集到的温度转换成电压信号反馈到单片机，然后与温度的给定值进行比较，通过比较来控制加热装置，从而达到控制温度的目的。

关键词：单片机，热水器，温度控制，AT89C51，DS18B20

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ABSTRACT

Water heater is common in industrial production and family life application，and the temperature control is one of the core technology of water heater,which means temperature control technology plays a vital role for the development of water heater. Thus, the research of temperature controller has very important practical significance for improving water heater quality.

Regarding to the feathers and the significance of hot water heater temperature control, this subject designs a kind of system based on single-chip microcomputer control.The system includes hardware and software.Hardware circuit is designed the AT89C51 as main microprocessors, and the hardware circuit includes the temperature signal acquisition circuit,temperature digital display circuit, the keyboard set temperature circuit, alarm circuit, light coupling isolation output circuits, analog heating circuit.The softeware is mainly aimed at heating device programming.Temperature sensor DS18B20 collects the temperature and converse it into voltage signal, feedbacks to the microcontroller, then compared with the given temperature value, by which to controle the heating device, so as to control the temperature.

Keywords:SMC，water heater，temperature control，AT89C51, DS18B20

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目 录

摘 要 .................................................................................................................... I ABSTRACT ......................................................................................................... II 第1章 绪 论 ..................................................................................................... 1

1.1 课题背景 .......................................................... 1 1.2 系统任务 .......................................................... 1 1.3 设计思路 .......................................................... 2

第2章 热式热水器温度控制系统的硬件设计 ............................................... 3

2.1 AT89C51单片机简介 ................................................ 3

2.1.1 AT89C51单片机资源简介 ....................................... 3 2.2 数字温控芯片DS18B20介绍 .......................................... 5

2.2.1 DS18B20的特性 ............................................... 5 2.2.2 DS18B20的测温原理 ........................................... 6 2.2.3 DS18B20与单片机接口电路 ..................................... 7 2.3 显示驱动电路设计 .................................................. 7 2.4 按键电路设计 ...................................................... 8 2.5 光耦隔离输出电路 .................................................. 8 2.6 整体硬件电路 ...................................................... 9

第3章 热式热水器温度控制系统的软件设计 ............................................. 10

3.1 系统软件设计框图 ................................................. 10 3.2 主程序模块 ....................................................... 11 3.3 温度采集模块 ..................................................... 12 3.4 报警及加热电路模块 ............................................... 13 3.5 温度显示模块 ..................................................... 13 3.6 键盘扫描模块 ..................................................... 13

第4章 热式热水器温度控制系统仿真 ........................................................... 15

4.1 proteus简介 ..................................................... 15

4.1.1软件功能特点 ................................................ 15 4.2 仿真结果 ......................................................... 15

结 论 ................................................................................................................. 21 参考文献 ............................................................................................................. 22

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