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目录

摘          要... 2

第一章 绪论... 5

1.1  研究课题背景... 5

1.2  国内外发展概况... 7

1.3  课题研究的目的... 8

1.4  课题的研究内容及章节安排... 9

第二章 二氧化碳和温湿度检测系统控制系统的设计方案... 11

2.1  设计任务及要求... 11

2.2  二氧化碳和温湿度检测系统总体设计方案... 11

2.3  方案的论证与分析... 12

第三章 系统硬件部分设计... 13

3.1  总体设计... 13

3.2  主控制器设计... 14

3.2.1  芯片介绍... 14

3.2.2  最小系统电路设计... 16

3.2.3  时钟电路设计... 17

3.2.4  复位电路设计... 17

3.2.5  下载电路设计... 18

3.3  显示模块... 18

3.4  二氧化碳检测电路... 20

3.5  温湿度检测电路... 22

3.6  报警电路... 24

第四章 系统软件部分设计... 25

4.1  主程序流程图... 25

4.2  显示程序设计... 25

第五章 系统调试部分... 27

5.1  软件研发的背景... 27

5.2  软件程序设计... 28

5.3  电路图绘制... 29

第六章  总结展望... 30

参考文献... 31

致    谢... 32

附录A.. 33

附录B.. 33

摘 要

随着我国微型电子技术和嵌入式系统的发展，目前行业内相对比较传统的二氧化碳和温湿度检测系统无法满足客户的需求。为了改进传统二氧化碳和温湿度检测系统在控制上得短板问题，在本次毕业设计中，将使用相对先进、快捷、智能的控制机制。该系统的控制大脑为核心控制器51系列嵌入式开发系统，主要采用数字控制技术，将输入的连续模拟电压信号转换成离散的数字信号，传输给液晶显示器。该二氧化碳和温湿度检测系统设计具有智能控制、数字显示等功能，而且性价比高、度准确、能耗较低、制作简易、称重方便快捷等特点，给人民生活带来了很大的影响，在市场上很受欢迎。

二氧化碳和温湿度检测控制方式很多。本系统采用 STC89C52RC单片机以及单片机最小系统，二氧化碳浓度检测传感器MH-Z14A，温湿度传感器、1602液晶显示等部件组成，设计一个基于单片机的二氧化碳和温湿度检测系统设计。该智能控制系统设计主要从国内外发展状况，硬件控制部件选择，根据控制原理绘制硬件电路，控制系统软件程序设计开发，软硬件联调仿真四个方面进行详细讲解。该控制系统使用AT89C52嵌入式开发系统、传感器信号采集电路、电路显示部分、数据转换电路、复位电路和时钟电路等组成智能二氧化碳和温湿度检测系统。

该智能控制系统设计主要从国内外发展状况，硬件控制部件选择，根据控制原理绘制硬件电路，控制系统软件程序设计开发等方面进行详细讲解。该控制系统使用STC89C52RC嵌入式开发系统、电路显示部分、报警电路等组成智能二氧化碳和温湿度检测系统控制系统。

关键词：二氧化碳检测；单片机；显示；温湿度检测；报警

Abstract

With the development of micro electronic technology and embedded system in China, the current industry is relatively more traditional carbon dioxide and temperature and humidity detection system can not meet the needs of customers. In order to improve the traditional carbon dioxide and temperature and humidity detection system in the control of the short board problem, in this graduation project, will use relatively advanced, fast, intelligent control mechanism. The control brain of the system is the core controller of the 51 series embedded development system, which mainly uses digital control technology to convert the input continuous analog voltage signal into discrete digital signal and transmit it to the LCD. The carbon dioxide and temperature and humidity detection system design has intelligent control, digital display and other functions, and cost-effective, accurate, low energy consumption, simple production, convenient and fast weighing characteristics, has brought a great impact on people's lives, is very popular in the market.

Carbon dioxide and temperature and humidity detection and control methods are many. This system uses STC89C52RC single chip microcomputer and single chip microcomputer minimum system, carbon dioxide concentration detection sensor MH-Z14A, temperature and humidity sensor, 1602 LIQUID crystal display and other components, design a single chip based on carbon dioxide and temperature and humidity detection system design. The intelligent control system design mainly from the domestic and foreign development, the choice of hardware control components, according to the control principle to draw the hardware circuit, control system software program design and development, software and hardware joint adjustment simulation four aspects in detail. The control system uses AT89C52 embedded development system, sensor signal acquisition circuit, circuit display part, data conversion circuit, reset circuit and clock circuit to form an intelligent carbon dioxide and temperature and humidity detection system.

The intelligent control system design mainly from the domestic and foreign development, the choice of hardware control components, according to the control principle to draw the hardware circuit, control system software program design and development, etc. The control system uses STC89C52RC embedded development system, circuit display part, alarm circuit and other components of intelligent carbon dioxide and temperature and humidity detection system control system.

Keywords: Single Carbon dioxide detection; Single chip microcomputer; Display; Temperature and humidity detection; Call the police

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基于单片机的温湿度和二氧化碳检测系统设计资源-CSDN文库