体感温度计设计与制作毕业论文+设计程序+答辩PPT

基于单片机的体感温度计设计

摘要温湿度和气压是环境中重要的物理参数，人类的生存和社会活动与温湿度、气压密切相关。在生产和生活中的许多场合，不论是仓库管理、图书保存，还是工业生产、居民生活，都对环境中的温湿度、气压有一定的要求，在某些行业中对温湿度、气压的要求更高。因此，对环境中温湿度、气压的检测和控制显得尤为重要，温湿度、气压的检测在很多现代科技领域中也成为一项重要技术。并且随着人们生活水平的提高，人们对自己的生存环境越来越关注，而且温湿度、气压的变化与人体的舒适度和情绪也有直接的影响，所以对温度、湿度、气压的检测就非常有必要了。

环境测试仪的设计采用智能化的测量方法实现对温度、湿度、气压的检测。该系统以STC89C52单片机作为主控芯片，采用了具有精度高、成本低、体积小、接口简单等优点的DHT11温湿度传感器实现温度与湿度的检测，气压传感器MPX4115实现气压的检测，采用点阵字符型LCD显示温湿度字母、数字。

该体感温度计结构简单，并能很好的满足许多环境中对温湿度及气压检测范围和精度的要求。

关键词：STC89C52单片机传感器温湿度气压

AbstractThe humitureandatmospheric pressureareimportant physics parametersof environment, human being's survival and public activities go hand in hand with the parameters. many situations that are in the production and the life, not only warehouse management, preservation of books, but also industrial production, residents life, all have certain request to the humitureand theatmospheric pressureof the environment, some professions have higher requirements. Therefore，it appears very important to examination and control the humitureand theatmospheric pressureof the environment, and humiture-atmospheric pressuredetecting becomes an important technology in many modern science and technology fields.

The humiture andatmospheric pressuredouble parameters of the intelligent design test method for measuring temperature, humidity detection. This system toSTC89C52single-chip microcomputer as the main control chip, have used the high precision, low cost, small volume, simple interface of the advantages ofDHT11temperature,humidity sensorandMPX4115realize temperature and humidity test, The dot matrix characters type LED display temperature and humidity letters, Numbers.

That instrument structure is simple, and can satisfy the request of range and accuracy of the humitureandatmospheric pressurechecks in various environments.

Keywords：STC89C52microcontrollerSensorHumitureatmospheric pressure

1绪论1

1.1选题背景1

1.2体感温度计发展过程2

1.3体感温度计发展前景3

2体感温度计的工作原理及主要器件介绍4

2.1整体设计思路4

2.2单片机STC89C525

2.2.1单片机STC89C52简介5

2.2.2单片机STC89C52主要特点5

2.2.3单片机STC89C52工作模式7

2.2.4单片机STC89C52端口介绍8

2.3温湿度传感器DHT1110

2.3.1温湿度传感器DHT11介绍10

2.3.2温湿度传感器DHT11特点及应用领域10

2.3.3温湿度传感器DHT11工作原理11

2.4气压传感器MPX411514

2.5I2C总线定义15

3系统硬件的设计17

3.1温湿度传感器DHT11电路17

3.2气压传感器MPX411518

3.3 LCD显示18

3.4复位电路部分21

3.5时钟电路部分22

3.6超限处理电路25

3.7键盘电路26

4系统软件设计27

4.1体感温度计所支持的功能27

4.2体感温度计的工作流程27

4.3 C语言开发的优势30

5系统调试与运行31

5.1proteus软件介绍31

5.2proteus电路功能仿真33

5.3proteus对本设计的部分仿真34

结论35

致谢36

参考文献37

附录38