基于单片机的酒精浓度测试仪16.69

摘要
现如今，人们对生活的态度和生活方式变得不同,，不仅私家车成为了人们最普遍的交通工具，大多数人都有自己的私家车,而且人们对酒精的消耗量也越来越大，这些就导致酒后驾车行为越来越普遍，酒后驾车意外越来越频繁，涉及到的领域不断扩大，对社会的影响也不断增大。

酒精麻醉神经、使人大脑神经系统紊乱、身体不协调、身体难以自控等等，最终很容易造成事故。

因此本设计就非常有必要、非常具有现实意义，有了这个酒精浓度检测仪就能更好地对酒驾进行行为进行检测及控制。

本设计可以实现检测和显示不同浓度的酒精，而且体积小便于随身携带，非常适合人们自行检测和交警工作等，方便又安全。

这个设计在STC89C51单片机的控制、指导下，通过气体传感器MQ-3对外界的酒精浓度进行响应,然后传感器产生电阻变化，形成电压信号即模拟信号，A/D模数转换器将此信号转换成数字信号，并且将其转存起来，最后由LCD显示酒精密度。

关键词：酒精浓度传感器（MQ3）；STC89C51单片机；A/D模数转换器；LCD1602液晶显示器
Abstract
Nowadays, people's life attitude and life style is different, and not only private cars became the most common means of transportation, people most people have their own cars, and people to the consumption of alcohol is becoming more and more big, the behavior leads to drunk driving is becoming more common, drunken driving accident is more and more frequent,'s sphere is more and more broad, and the impact on the society is more and more big. The alcohol anesthetized nerve, causes the people of the people's people's brain to be nervous system disorder, the body is not coordinated, the body is difficult self-control and so on, it is very easy to cause an accident. So this design is very necessary, very realistic, with the alcohol concentration detector can better for detection and control of drunk driving behavior. This design can achieve detection and display of different concentrations of alcohol, small volume and easy to carry, very suitable for people to detect and police work, convenient and safe. This design is in STC89C51 single chip under the guidance of MQ - three of the world through A gas sensor detect alcohol concentration, and then produce resistance change, form A voltage signal that is analog signal A/D analog-to-digital converter converts the signals into digital signals, and ripping it up, finally by the LCD display alcohol density.
Key words:Alcohol concentration sensor (MQ3); STC85C5 MUC; A / D converter; LCD
目录
引言 (5)
1. 绪论 (6)
1.1酒精浓度测试仪的开发背景 (6)
1.2酒精浓度检测仪的现状及发展趋势 (6)
1.3酒精浓度检测仪设计内容及论文介绍 (7)
1.4本章小结 (8)
2 系统总体方案设计 (8)
2.1设计总方案简介 (8)
2.2元器件的确认 (9)
2.2.1 单片机 (9)
2.2.2传感器 (9)
2.2.3 模数转换器 (9)
2.2.4 液晶显示器 (9)
3 系统硬件设计 (10)
3.1单片机模块 (10)
3.1.1单片机简介 (10)
3.1.2 单片机最小系统电路 (12)
3.2模数转换器 (13)
3.2.1 模数转换器简介 (13)
3.3液晶显示器 (15)
3.3.1液晶显示器简介 (15)
3.3.2 液晶显示器模块电路 (17)
3.4传感器 (17)
3.4.1 气体传感器简介 (17)
3.4.2 气体传感器电路 (19)
3.5按键设计 (20)
3.6报警电路 (21)
3.6系统硬件设计原理图分析 (21)
3.7本章小结 (22)
4 软件设计 (23)
4.1编译语言 (23)
4.2主程序模块 (23)
4.3按键输入模块 (24)
4.4A/D转换模块 (25)
4.5液晶显示输出模块 (26)
4.6本章小结 (28)
5 系统调试 (28)
5.1系统硬件调试 (28)
5.2系统软件调试 (29)
6 结束语 (30)
感谢语 (31)
参考文献 (32)。