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毕业设计(论文)--基于单片机的空气湿度调节器的设计.doc
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毕业设计(论文)--基于单片机的空气湿度调节器的设计.doc
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论文题目: 基于单片机的空气湿度调节器的设计
学生姓名: ***
专业年级: ****级自动化*班
指导教师: *** 职称 **
2016 年 05 月 27 日
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目录
摘 要 ........................................................................................................................................I
Abstract ...................................................................I
第 1 章 前 言..............................................................1
1.1 研究的目的和意义......................................................1
1.1.1 国内外发展状况......................................................1
1.2 应解决的主要问题 ......................................................2
第 2 章 系统设计方案的研究与论证...........................................3
2.1 湿度的定义............................................................3
2.2 系统控制结构组成......................................................3
2.3 系统的设计原理........................................................3
2.3.1 系统的性能特点......................................................4
第 3 章 硬件电路设计.......................................................5
3.1 处理器模块设计........................................................5
3.1.1 单片机 AT89C51 简介及应用............................................5
3.1.2 处理器的功能........................................................6
3.1.3 时钟电路............................................................6
3.1.4 CPU 监控电路........................................................7
3.2 相对湿度的电路设计....................................................8
3.2.1 传统电容湿度传感器的缺点............................................8
3.2.2 SHT71 温湿度传感器的功能 ............................................8
3.2.3 SHT71 温湿度传感器的特点 ............................................9
3.3 电源电路的设计.......................................................10
3.4 湿度调节模块的设计...................................................11
3.4.1 湿度调节的结构框图.................................................11
3.4.2 湿度调节原理.......................................................11
3.5 显示模块设计.........................................................12
3.5.1 LED 显示器的介绍 ...................................................12
3.5.2 单片机与 LED 接口...................................................13
3.6 按键模块的设计.......................................................14
3.6.1 键盘接口工作原理...................................................14
3.6.2 单片机与键盘接口...................................................14
3.6.3 按键抖动原因及处理方案.............................................15
第 4 章 软件程序设计......................................................16
4.1 软件设计的总体流程图.................................................16
4.2 主程序流程图.........................................................17
4.3 数据采集流程图.......................................................17
4.4 子程序流程图设计.....................................................17
4.4.1 显示子程序流程图...................................................17
4.4.2 按键子程序流程图...................................................18
第 5 章 结论 .............................................................20
参考文献.................................................................21
致 谢....................................................................23
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I
基于 51 单片机的空气湿度调节器的设计
学 生:***
专 业:自动化
指导教师:***
摘 要:随着科学技术,人民生活水平的发展,人们的室内居住环境的不断改善,
出现了空调,智能温度控制器,室内空气净化器等提高人们生活条件的智能产品。
但是,这并不能满足人民群众日益增长的生活需求,对湿度提出控制要求。
本设计采用了以 89C51 单片机控制的的智能湿度控制器,使用 SHT71 温湿度
传感器,通过软件编程,使用蒸汽机和排气扇自动控制度,对当前环境相对湿度
实现自动调整:通过键盘设置和调节湿度的初始值,当室内空气湿度太高时,控
制系统自动启动排气扇,减少空气中的部分水蒸汽,来减少当前空气中的湿度;
当室内空气湿度太低时,控制系统自动开启蒸汽机,增加空气中水蒸气的含量,
来起到增加湿度的作用,控制空气湿度保持在理想状态。
通过本文设计的单片机的空气湿度控制器,可以实现对室内当前环境的自动
控制。
关键词:单片机 AT89C51;湿度控制;湿度传感器
Humidity micro-controller-based air
Name:***
Major:Automati
Tutor:***
Abstract: With the development of science and technology, people's living standards,
and constantly improve people's indoor living environment, there has been
air-conditioned, intelligent temperature controller, the indoor air purifiers and other
improvement of living conditions of intelligent products. However, this does not meet
the people's growing needs of life, some people raised humidity requirements, on this
basis, the design uses a 89C51 micro-controller to control the humidity intelligent
controller. This system uses a SHT71 series monolithic integrated sensor; and by
software programming, coupled with the appropriate design of the control circuit, it
can automatically adjust the current environment relative humidity: when the indoor
air humidity is too high, the control system automatically starts row gas fan, reducing
the air portion of the water vapor to reduce the humidity in the air current; when the
indoor air humidity is too low, the control system automatically open the steam
engine, increase the amount of water vapor in the air to play a role in increasing the
humidity control air humidity is kept at ideal state; keyboard settings and adjusting
the initial value of the humidity, and the other in the design process, taking into
account the intervention of the processor, adding a micro-controller circuit. MCU
![](https://csdnimg.cn/release/download_crawler_static/87983010/bg5.jpg)
II
based humidity controller design, make me a better understanding of sensor
technology and detection technology, while the learned expertise to conduct a
systematic review and revision.
Keywords:89C51;Humidity control;Humidity Sensor
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