智能风扇调速系统的设计

本 科 毕 业 论 文

智能风扇调速系统的设计

Design of Intelligent Control System for Fans

学院名称： 电子信息与电气工程学院 专业班级： 学生姓名： 学 号： 指导教师姓名： 指导教师职称： 讲 师

2014年5月

毕业设计（论文）原创性声明和使用授权说明

原创性声明

本人郑重承诺：所呈交的毕业设计（论文），是我个人在指导教师的指导下进行的研究工作及取得的成果。尽我所知，除文中特别加以标注和致谢的地方外，不包含其他人或组织已经发表或公布过的研究成果，也不包含我为获得安阳工学院及其它教育机构的学位或学历而使用过的材料。对本研究提供过帮助和做出过贡献的个人或集体，均已在文中作了明确的说明并表示了谢意。

作 者 签 名： 日 期： 指导教师签名： 日 期：

使用授权说明

本人完全了解安阳工学院关于收集、保存、使用毕业设计（论文）的规定，即：按照学校要求提交毕业设计（论文）的印刷本和电子版本；学校有权保存毕业设计（论文）的印刷本和电子版，并提供目录检索与阅览服务；学校可以采用影印、缩印、数字化或其它复制手段保存论文；在不以赢利为目的前提下，学校可以公布论文的部分或全部内容。

作者签名： 日 期：

目 录

摘要 ··············································································································I Abstract ······································································································· II 引言 ··································· 1 第一章 绪论 ································································································ 1

1.1 智能风扇控制系统概述 ·········································································· 2 1.2 设计任务和主要内容 ············································································· 2 1.3.1 系统框图 ·························································································· 4 1.3.2 系统功能描述 ·························································· 错误！未定义书签。

第二章 方案论证 ························································································· 4

2.1 系统总体设计 ······················································································ 4 2.1.1 系统框图 ·························································································· 4 2.2 温度传感器的选择 ················································································ 4 2.3 控制核心的选择 ··················································································· 5 2.4 显示电路 ···························································································· 6 2.5 调速方式 ···························································································· 6

第三章 硬件设计 ························································································· 7

3.1 主要元器件介绍 ··················································································· 7 3.1.1 AT89S51单片机简介 ············································································ 7 3.1.2 DS18B20数字温度传感器简介 ······························································· 9 3.1.3 八段LED数码管简介 ········································································ 11 3.2 电路设计 ·························································································· 12 3.2.1 开关复位与晶振电路 ········································································· 12 3.2.2 独立按键连接电路 ············································································ 13 3.2.3 数码管显示电路 ··············································································· 13 3.2.4 温度采集电路 ·················································································· 14

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3.2.5 风扇驱动与调速电路 ········································································· 16 3.2.6 电路总图 ························································································ 16

第四章 软件设计 ························································································· 18

4.1 系统软件总体设计 ·············································································· 18 4.2 数字温度传感器模块和显示子模块的设计 ················································ 18 4.3 电机控制模块设计 ·············································································· 19 4.4 系统功能描述 ···················································································· 20

第五章 系统调试 ······················································································· 21

5.1 软件调试 ························································································· 21 5.1.1 按键显示部分的调试 ········································································ 21 5.1.2 传感器DS18B20温度采集部分的调试 ················································· 21 5.2 硬件调试 ························································································· 22 5.2.1 按钮显示部分的调试 ········································································ 22 5.2.2 传感器DS18B20温度采集部分的调试 ················································· 22 5.3 调试过程中遇到的问题及其解决方法 ······················································ 22

结论 ··········································································································· 24 致谢 ··········································································································· 25 参考文献 ··································································································· 25 附录 ··········································································································· 27

附录A 电路仿真图 ·················································································· 27 附录B 电路PCB图 ················································································· 28 附录C 程序清单 ····················································································· 36 附录D 实物图 ························································································ 29

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