毕业设计 基于PROTEUS的温湿度测量系统设计

河南城建学院本科毕业设计（论文） 摘要

摘 要

温度和湿度是两个最基本的环境参数，与人们的生活息息相关。在工农业生产、气象、环保、国防、科研等部门，经常需要对环境温度和湿度进行测量和控制。准确测量温湿度在生物制药、食品加工、造纸等行业更是至关重要。因此研究温湿度的测量和控制方法具有重要的意义。

本设计实现的是单片机温湿度测量和控制系统，通过LCD显示所测量的温湿度。系统采用集温湿度传感器与A/D转换器于一体的SHT11芯片，通过单片机进行处理显示，其它模块包括了实时时钟/日期产生电路和超限报警处理电路，对测量的值进行实时显示和报警处理。文章介绍了基于ATMEL公司的AT89C51系列单片机的温湿度实时测量与控制系统和显示系统的设计，包括介绍了硬件结构原理，并分析了相应的软件的设计及其要点，包括软件设计流程及其程序的实现。系统结构简单、实用，提高了测量精度和效率。 关键词：AT89C51、SHT11、LCD、DS1302、温湿度控制

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河南城建学院本科毕业设计（论文） 摘要

ABSTRACT

Temperature and humidity are two basic environmental parameters which are closely related to people’s lives. In the industrial and agriculture production, meteorology, environmental protection, national defense, scientific research and other departments, we often need to measure and control the temperature and humidity of the environment. Accurate measurement of temperature and humidity in the pharmaceutical, food processing, paper making and other sectors is essential. So the method of temperature and humidity control and measurement is of great significance.

The design implementation of measurement and control temperature and humidity is MCU system, through which the temperature and humidity measurement LCD. System adopts set temperature and humidity sensor and A/D converter for SHT11 chip microcontroller processing, through that other modules including real-time display and alarm. The paper introduces the ATMEL company based on AT89C51 single-chip series of temperature and humidity measurement and control system and real-time display system design, including the hardware structure and principle, and the corresponding software design, including the design of the software and its key process and procedure. System structure is simple, practical, and improve the measuring precision and efficiency.

Key words: AT89c51, SHT11、LCD、DS1302、temperature and humidity control

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河南城建学院本科毕业设计（论文） 目录

目 录

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

1.1 研究的目的及意义 ............................................ 1 1.2 国内外研究情况 .............................................. 1 1.3 系统内容的设计 .............................................. 2

1.3.1 系统的主要性能指标..................................... 2 1.3.2 主要工作任务........................................... 2 1.4 方案论证 .................................................... 2 第2章 工具简介..................................................... 4

2.1 C语言....................................................... 4

2.1.1 C语言的优点 ........................................... 4 2.1.2 C语言的缺点 ........................................... 4 2.2 Proteus简介................................................. 4 2.3 Keil C51编译器简介.......................................... 5

2.3.1 8051开发工具 .......................................... 5 2.3.2 uVision2集成开发环境 ................................. 5

第3章 硬件设计..................................................... 7

3.1 芯片介绍 .................................................... 7

3.1.1 单片机——AT89C51...................................... 7 3.1.2 LCD显示——LCD1604 .................................... 9 3.1.3 DS1302原理及应用 ..................................... 11 3.1.4温湿度传感器SHT11..................................... 15 3.2 模块功能介绍 ............................................... 18

3.2.1 复位电路部分.......................................... 18 3.2.2 DS1302时钟电路模块 ................................... 19 3.2.3 SHT11传感器模块 ...................................... 19 3.2.4 显示电路模块.......................................... 20 3.2.5 超限处理电路模块...................................... 20 3.3 整体电路图 ................................................. 21 第4章 软件设计.................................................... 22

4.1 程序框图 ................................................... 22

4.1.1 主程序框图............................................ 22

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河南城建学院本科毕业设计（论文） 目录

4.1.2 温湿度采集及处理框图.................................. 23 4.1.3 LCD显示框图 .......................................... 23 4.2 主函数解析 ................................................. 24 第5章 仿真与调试.................................................. 26 结 论............................................................. 29 致 谢............................................................. 30 参考文献........................................................... 31 附录A 系统源程序 .................................................. 32 附录B 系统原理图 .................................................. 55

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