酒精浓度检测仪的设计

酒精浓度检测仪的设计(任务书,开题报告,论文13000字)
摘要
近年来，随着社会进步以及经济的提升，人们的生活质量变得越来越高,中国汽车的数量也愈来愈多,然而酒后驾车行为造成的交通事故慢慢增多，对社会的危害也愈发变大。
除此之外，根据WHO的调查，道路事故中一半以上的事故都与酒精摄入有关。长久以来，酒精对人体的影响不用多说，而酒后驾驶的潜在危险更加不容小觑。在我国，因为喝酒开车导致的交通事故触目惊心。随着人们对交通安全要求的提高，酒后驾驶迅速地进入大众的视线。而2010年8月的醉驾入刑更加体现出人们对酒驾的零容忍的态度。鉴于此，酒精浓度检测的研究引起了广泛的关注。
本毕业设计结合实际，以实用性，低性价比，可靠的原则选择合适的元件，通过设计调试和仿真设计出一款酒精浓度检测仪。本设计的基本思路是以单片机为核心，酒精气敏传感器为探测元件，通过模数转换器将传感器送出的模拟信号转换成单片机所需要的数字量，最终经过硬件电路的设计和系统软件的调试，在液晶屏上显示出来。本设计还具有设定报警值的功能，当测量数据大于设定的报警值时，系统会自动发出声光报警。本系统设计的优点是电路设计比较简单，性价比较高，实用性也较强。
关键词:单片机；模数转换器；传感器；液晶屏
 
Abstract
In recent years, with the progress of society and the improvement of economy, the quality of life of people has become more and more high, the number of Chinese cars is increasing. However, the traffic accidents caused by drunk driving are increasing, and the harm to society is becoming more and more serious.
In addition, according to the WHO survey, more than half of accidents in road accidents are related to alcohol intake. For a long time, the impact of alcohol on the human body is not to be mentioned much, and the potential danger of drunk driving should not be underestimated. In China, traffic accidents caused by drinking and driving are shocking. With the improvement of traffic safety requirements, drunk driving has rapidly entered the public eye. The drunken driving sentence in August 2010 also showed a zero tolerance attitude towards drunk driving. In view of this, the detection of alcohol concentration has attracted wide attention.
This graduation design combined with practical, practical, low cost performance, reliable principle to select the appropriate components, through the design and Simulation of an alcohol concentration tester. The basic idea of this design is to use the single chip microcomputer as the core and the alcohol gas sensor as the detecting element. The analog signal sent by the sensor is converted into the digital amount needed by the single chip microcomputer through the analog to digital converter. Finally, the design of the hardware circuit and the debugging of the system software are finally displayed on the LCD screen. This design also has the function of setting alarm value. When the measured data is greater than the set alarm value, the system will automatically send out the acousto-optic alarm. The advantages of this system design are simple circuit design, high cost performance and strong practicability.
Key word: MCU ；Analog to digital converter；Sensor；LCD screen
 

目录
摘要    I
Abstract    II
第1章 绪论    1
1.1    论文的研究背景及意义    1
1.2    国内外的发展现状    1
1.3    论文的主要工作    2
第2章系统总体设计方案    3
第3章系统元器件选型及硬件电路设计    4
3.1 单片机选型及其电路    4
3.1.1 单片机介绍    4
3.1.2  单片机晶振电路    6
3.1.3  单片机复位电路    7
3.2  传感器选型及其电路    7
3.2.1  传感器选型    8
3.2.2  传感器介绍    8
3.2.3  传感器电路    9
3.3  模数转换器的选择    11
3.3.1  模数转换器简介    11
3.3.2  ADC0832工作原理    12
3.4  液晶显示模块    14
3.5  报警电路    16
3.6  按键电路    17
3.7  电源电路    19
第4章系统软件设计    21
4.1  主程序流程图    21
4.2  A/D转换模块程序流程图    22
4.3  按键程序流程图    25
4.4  液晶显示程序流程图    26
第5章系统调试    31
5.1  系统硬件调试    31
5.2  系统软件调试    31
第6章结论    32
参考文献    33
附录   主程序    34
致谢    42