基于单片机大棚温控系统毕业论文+电路图+原理图+源代码

Abstract

Is introduced in this paper a composed of single chip microcomputer temperature control system, mainly used to provide the solution temperature, at the same time also can real-time monitor the temperature change trend, and alarm function.It USES STC89C52RC microcontroller, DS18B20, buzzer alarm detection circuit and LCD1602 to realize temperature control function.Temperature detection is used DS18B20 temperature sensor, the detection by the temperature of the single chip microcomputer single bus protocol reads and displays it on the LCD1602 LCD display.In addition, it also can set the upper limit of temperature by buttons, if the temperature is over limit, the buzzer alarm, greatly improved the security of the system.In the subsequent chapters in this paper in detail introduces the overall design of system, hardware design, software design, etc.

Keywords: temperature detection control;Single chip microcomputer;DS18B20.The police

目录

1、绪论 1

1.1课题背景 1

1.2 本课题研究意义 2

2、 系统总体方案设计 3

2.1、传感器部分 3

2.2、主控制部分 4

3、系统硬件设计 6

3.1 STC89C52RC单片机主控模块设计 6

3.2单片机最小系统 9

3.2.1时钟电路 9

3.2.2复位电路 10

3.2.3 STC89C52RC中断技术概述 10

3.3 温度采集模块DS18B20 11

3.4按键模块设计 13

3.5蜂鸣器报警电路 13

3.6 LCD1602液晶显示 14

4、软件设计 16

4.1软件介绍 16

4.2 主程序流程图设计 17

4.3各子程序设计 18

4.3.1按键设置子程序 18

4.3.2 DS18B20温度检测子程序 19

4.3.3 LCD1602液晶显示子程序 20

4.3.3 按键设置子函数 22

5、总结与展望 23

6、 参考文献 24

7、致谢 25

附录一 系统原理图 26

附录二 系统部分源程序 27