基于单片机的温湿度计的设计

单片机课程设计

项目名称基于单片机的湿度显示器设计

专业班级通信092

学生姓名

指导教师

2012年12月12日

温度和湿度是两个最基本的环境参数，人们生活与温湿度息息相关。在日常生活、工业、医学、环境保护、化工、石油等领域，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，研究温湿度的测量方法和装置具有重要的意义。

随着科技的不断发展，单片机技术已经普及到我们的工作、生活、科研等各个领域。已经成为一种比较成熟的技术。由于单片机集成度高、功能强、可靠性高、体积小、功耗低、使用方便等优点，目前已经渗透到我们工作和生活的方方面面。

本论文介绍了一种以AT89C51为主要控制器件，以DHT11为数字温度传感器的新型数字温湿度计。本设计主要包括硬件电路的设计和系统软件的设计。

关键词：温湿度传感器；LCD1602；AT89C51；DHT1 1；

Temperature and humidity are the two most basic environmental parameters, people's life is closely related with the temperature and humidity. In daily life, industry, medicine, environmental protection, chemical industry, petroleum and other fields, we often need to environment temperature and humidity measurement and control. Accurate measuring temperature and humidity in biological pharmacy, food processing, paper making industries is very important. Therefore, the study of the temperature and humidity measurement method and equipment has important significance.

With the continuous development of science and technology, microcontroller technology has spread to our work, life, scientific research, and other fields. Has become a more mature technology. Due to the high level of integration SCM, strong function, high reliability, small volume, low power consumption, easy to use, etc., and has penetrated into our work and all aspects of life.

This paper introduces a kind of AT89C51 as the main control device, in order to DHT11 digital temperature sensor for new digital temperature and humidity meter. This design mainly includes hardware circuit design and software design.

Keywords:Temperature and humidity sensor; LCD1602; AT89C51; DHT1 1;

目录

摘要........................................................................................................................................................... I Abstract ....................................................................................................................................................... II 目录.............................................................................................................................................................III 第1章绪论.. (1)

1.1 课程设计背景概述 (1)

1.2 本课程设计的内容 (1)

1.3 本课程设计的意义 (1)

第2章系统设计方案及硬件设计 (3)

2.1 系统设计方案 (3)

2.2 系统硬件介绍 (3)

2.2.1 AT89C51介绍 (3)

2.2.2 DHT11数字传感器介绍 (7)

2.2.3 LCD1602介绍 (8)

2.3 系统部分硬件电路设计介绍 (11)

2.3.1 主控制电路的设计 (11)

2.3.2 温湿度检电路的设计 (12)

2.3.3 LCD1602液晶显示电路的设计 (13)

第3章系统的软件设计 (15)

3.1 系统软件主程序流程 (15)

3.2 DHT11数据采集流程 (17)

结论 (19)

参考文献 (20)

附录1 (21)

附录2 (22)

项目特色与创新 (28)

致谢 (29)