xxxx-基于单片机的温控智能风扇设计

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玉林师范学院本科生毕业设计

基于单片机的温控智能风扇设计

Temperature control intelligent fan design Based on the single-chip

院 系 电子与通信工程学院

专 业 电子信息科学与技术

班 级 xxxxx

姓 名 xxxxx

学 号 xxxx

指导教师单位 xxxx

指导教师姓名 xxxx

指导教师职称 xxxx

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基于单片机的温控智能风扇设计

xxxxxxxxx

摘要

单片机以其功能强、体积小、可靠性高、造价低等优点，成为自动化领域和其他测控领域中广泛应用的器件。在温度控制系统的设计中,采用单片机作为系统的主控芯片,能很大程度地满足市场对成本低、性能稳定、控制现场温度的需求,具有较为广阔的市场前景。

本文设计了基于单片机的智能温控风扇系统，分析了硬件电路与软件设计。采用AT89C51作为控制器，利用温度传感器DS18B20作为温度采集元件，根据采集到的温度，通过三极管的放大作用来实现风扇电机的转动。当检测到的温度超出所设置的上下限温度的范围时，有报警提示。并根据检测到的温度与系统设置的温度的比较实现风扇电机的自动启动与停止，且能根据温度的变化自动改变风扇电机的转速，同时利用四个数码管即时显示检测到的温度，精确到小数点两位。

关键词：单片机，AT89C51，DS18B20，温度采集，温控智能风扇

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Temperature control intelligent fan design Based on the single-chip

Electronic information science and technology2009-1 DengXueling

Supervisor ChenYuning

Abstract

the single-chip has advantages of powerful functions, small volume, high reliability, low cost. Therefore become automation field and other measurement field are widely use’s

devices . In the design of temperature control system, using the single chip as main control chip ,it can to meet the demand of the market ,whice asks for low cost, stable performance, controlling the temperature.It has a broader prospect on the market.

This paper introduce an intelligent and temperature control fan system based on

single-chip-microprocessor, and analyzed the hardware circuit, and software design of this system. The design Adopts the AT89C51 as the controller and use temperature sensor

DS18B20 as the temperature capture element. On the basis of the collected temperature, to drive the fan motor through Triode amplifying function .When the detected temperature was beyond the limited upper and lower temperature of the set, there will be an alarm prompt. And according to the detected temperature was compared with the system set the temperature of the implementation of the fan motor start and stop automatically, and can automatically according to the variation of the temperature change of the fan motor speed, at the same time using the four digital tube instant showed that the temperature of the detected, given to two decimal points.

Key words: Single-chip-microprocessor , AT89C51, DS18B20, temperature capture,

temperature control intelligent fan

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目录

1 绪论 ......................................................................................................................................... 1

1.1 概述 ............................................................................................................................... 1

1.2 温度控制技术发展与现状 ........................................................................................... 1

1.3 本文设计的主要任务 ................................................................................................... 1

2 整体方案设计 ......................................................................................................................... 2

2.1 系统整体设计 ............................................................................................................... 2

2.2 系统元器件的选择 ....................................................................................................... 2

2.2.1 温度传感器的选择 ........................................................................................... 3

2.2.2 控制核心的选择 ................................................................................................. 3

2.2.3 温度显示器件的选择 ......................................................................................... 3

3 各单元模块的硬件设计 ......................................................................................................... 4

3.1 系统元器件简介 ........................................................................................................... 4

3.1.1 DS18B20单线数字温度传感器简介 ................................................................. 4

3.1.2 AT89C51简介 ...................................................................................................... 6

3.1.3 LED数码管简介 ................................................................................................. 8

3.2 各部分电路设计 ........................................................................................................... 9

3.2.1 开关复位与晶振电路 ......................................................................................... 9

3.2.2 独立按键连接电路 ........................................................................................... 10

3.2.3 数码管显示电路 ............................................................................................. 11

3.2.4 温度采集电路 ................................................................................................... 11

3.2.5 风扇电机驱动与调速电路 ................................................................. …… 此处隐藏：4969字，全部文档内容请下载后查看。喜欢就下载吧 ……