AT89C51单片机大棚温湿度控制系统设计+电路图+流程图
关键词：温室大棚；解耦控制；温湿度控制；单片机
The Design of Greenhouse Temperature and Humidity Control System Based on Single Chip
Abstract: The greenhouse, which is more and more widely used in agricultural pr-oduction, can create higher economic benefits for people. The key in the greenhou-se is the temperature and humidity control method. The traditional control method i-s entirely artificial, but it is time-consuming and inefficient. This article have desi-gned temperature and humidity control system of greenhouse, which consists of theMCU, temperature and humidity sensor DS18B20 and HS1100/HS1101, LCD1602 a-nd other components, In addition, the system also comes with the keyboard, and ca-n set and change the upper and lower limits on greenhouse temperature and humi-dity. The system has considered the economy and the applicability of comprehensiv-e cost. The experimental results show that the system is stable and high reliability to meet the requirements of the thesis.
Key Words: Greenhouse; Decoupling control; Temperature and humidity control; MCU
目 录
摘要 1
引言 1
1.硬件设计 2
1.1系统硬件总体结构设计 2
1.2系统工作原理 3
1.3元器件的选择 3
1.4主要芯片介绍 7
1.5系统I/O端口分配 9
1.6单元模块电路设计 10
2.解耦控制系统设计 11
2.1温湿度对角解耦控制 12
2.2温湿度转换补偿 15
3.软件设计 16
3.1软件设计的整体思想 16
3.2系统主程序设计 16
3.3按键子程序设计 18
3.4外部按键查询子程序设计 19
3.5调控子程序设计 19
3.6解耦模块设计 21
3.7报警子程序设计 21
3.8温湿度采样子程序设计 22
4.软件调试与仿真 25
4.1软件调试 25
4.2软件仿真 25
5.结束语 26
参考文献 26
附录 27
附录1：系统整体电路图 27
附录2：系统其它模块设计 27
附录3：LCD显示模块子程序设计流程图 29
致谢 30
基于单片机的大棚温湿度控制系统设计
引言
大棚温湿度控制系统的发展现状：
美国是将计算机应用于大棚和管理最早、最多的国家之一。美国开发的大棚计算机控制与管理系统可以根据作物的特点和生长所需要的条件，对大棚内的光照、温度、湿度等诸多因素进行自动控制。这种自动控制系统需要种植者输入温室作物生长所需的环境的目标参数，计算机根据传感器的实际测量值与事先设定的目标进行比较，以决定大棚温湿度的控制过程，按照相应的机构进行加热、降温或者是通风等。这种自动控制系统实现了自动化，适合规模化生产，提高了劳动生产率[1]。