蔬菜大棚温度湿度控制系统设计苏瑞秋毕业设计_计算机程序设计_计算机设计辅导_计算机设计代做_java_安卓_小程序_springboot_ssm计算机程序设计资料网

蔬菜大棚温湿度控制系统设计

[摘要] 蔬菜大棚温度湿度自动控制系统由主控制器AT89C51单片机、并行口扩展芯片8255、74LS373、A/D转换器0809、湿度传感器、温度传感器DS1820、固态继电器、RAM6264、掉电保护和LED显示器和报警电路等构成，实现对蔬菜大棚温湿度的检测与控制，从而有效提高蔬菜的产量。文中提出了具体设计方案，讨论了蔬菜大棚温湿度巡回检测与控制的基本原理，进行了可行性论证。给出了电路图和程序流程图并附有源程序。由于利用了单片机及数字控制系统的优点，系统的各方面性能得到了显著的提高。

[关键词] 温度传感器湿度传感器快速检测 A/D转换器 LED显示器固态继电器

Vegetables Canopy Temperature and Humidity Automatic Control

System

[Abstract] Vegetable greenhouse temperature humidity automatic control system consists of main controller AT89C51 single-chip microcomputer, parallel port expansion chip 8255, 74ls373, a / D converters 0809, humidity sensor, temperature sensor DS1820, solid state relay, RAM 6264, off electrical protection and LED display and alarm circuit structure, to realize the detection and control of temperature and humidity of greenhouse vegetables, so as to effectively improve vegetable yield. In this paper, the specific design scheme is put forward, and the basic principle of the temperature and humidity measurement and control of the greenhouse is discussed. The circuit diagram and program flow chart are given and the source program is attached. Due to the advantages of single chip microcomputer and digital control system, the performance of all aspects of the system has been significantly improved.

[Keyword] Temperature sensor humidity sensor Rapid detection A/D converter LED display Solid state relay

1概述………………………………………………………………………………………………………………. 1

2系统的硬件组成电路设计………………………………………………………………………………….. 3

2.1 系统的硬件组成框图 …………………………………………………………………………. 3

2.1.1 系统的工作原理 ……………………………………………………………………… 3

2.2系统主控制器部分设计 …………………………………………………………………………. 3

2.2.1 AT89C51的工作原理 …………………………………………………………………. 3

2.2.2 AT89C51的复位电路 …………………………………………………………………… 5

2.2.3 AT89C51的引脚功能 …………………………………………………………………… 5

2.3数据存储器的扩展………………………………………………………………………………….. 8

2.4 LED显示器………………………………………………………………………………………….. 11

2.5 A/D转换接口 ……………………………………………………………………………………. 13