-基于51单片机温湿度采集控制系统 - 图文

北方民族大学学士学位论文

摘 要

温湿度控制系统早已经成为当今社会研究的热门领域之一，同时温湿度也是现今工农业生产生活中必须要首先考虑的重要因素之一。因此现今社会生产生活中就迫切需要一种价格便宜、容易操作而且精确度高的温湿度控制系统。本系统设计就是利用AT89C52单片机对温湿度参量进行检测进而实现对温湿度参量的控制。

本系统设计通过使用AT89C52单片机、DHT11传感器模块、LCD1602液晶显示屏模块以及二极管闪烁报警模块。简单的系统设计就可以基本上满足本系统设计的系统设计要求。DHT11数字温湿度传感器负责把采集到的温湿度信号传送给AT89C52单片机。温湿度经过AT89C52单片机处理，然后AT89C52准确地把温湿度信号发送到LCD1602液晶显示屏模块，温湿度数据就可以准确地显示到LCD1602液晶屏上面，同时我们可以分别对温度和湿度设置上下限，越限二极管闪烁报警。

关键词：AT89C52单片机，DHT11传感器模块，1602液晶显示屏模块，二极管闪烁报警模块

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基于51单片机温湿度采集控制系统

ABSTRACT

Temperature and humidity control system has already become one of the most popular areas of today's social research, one of the factors of temperature and humidity is also today's industrial and agricultural production life must first consider important. Therefore the social production and living an urgent need for a cheap, easy operation and high precision temperature and humidity control system. The system design is the use of the AT89C52 microcontroller temperature and humidity parameters for testing so as to realize the control of temperature and humidity parameters.

This design by using AT89C52 microcontroller, the DHT11 sensor module, LCD1602 LCD module diode flashing alarm module. Simple design can be substantially meet the design requirements of the design. DHT11 digital temperature and humidity sensor is responsible for the collected temperature and humidity signal is transmitted to the AT89C52 microcontroller. Temperature and humidity after AT89C52 single-chip processing, and then AT89C52 accurate temperature and humidity signal is sent to the LCD1602 LCD display module, temperature and humidity data can accurately display the LCD1602 LCD screen above, and we can set upper and lower limits of temperature and humidity, the more limiting diode flashing alarm.

Keywords:AT89C52 microcontroller, the DHT11 sensor module, 1602 LCD module, diode flashing alarm module

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北方民族大学学士学位论文

目 录

第1章 绪 论 ................................................................................................................................... 1

1.1课题研究的背景 ................................................................................................................ 1 1.2课题研究的意义 ................................................................................................................ 1 1.3课题研究的主要内容 ........................................................................................................ 2 1.4课题研究的工作原理 ........................................................................................................ 2 第2章 系统总体方案系统设计 ..................................................................................................... 3

2.1功能要求 ............................................................................................................................ 3 2.2系统设计思路 .................................................................................................................... 3 2.3方案选择 ............................................................................................................................ 3

2.3.1传感器选择方案 .................................................................................................... 3 2.3.2显示器选择方案 .................................................................................................... 4 2.3.3单片机主芯片选择方案 ........................................................................................ 4 2.4 总体系统设计框图 ........................................................................................................... 4 第3章 系统硬件系统设计 ............................................................................................................. 6

3.1概述 .................................................................................................................................... 6 3.2主控模块系统设计 ............................................................................................................ 6

3.2.1 ATC89C52芯片的简介 .......................................................................................... 6 3.2.2主控模块电路原理图 ............................................................................................ 7 3.3 DHT11传感器模块系统设计 ............................................................................................ 7

3.3.1 DHT11传感器简介 ................................................................................................ 7 3.3.2 DHT11传感器模块电路系统设计 ........................................................................ 9 3.4 1602液晶显示模块系统设计 .......................................................................................... 9

3.4.1 1602液晶显示屏简介 .......................................................................................... 9 3.4.2 1602液晶显示模块电路原理图 ........................................................................ 11 3.5 报警模块 ......................................................................................................................... 11

3.5.1二极管工作原理 .................................................................................................. 11

第4章系统软件系统设计 ............................................................................................................. 13

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