更新时间:11-12 (你好,学长)提供原创文章
摘要:随着我国经济的发展,人民的生活水平提高,越来越多的家庭有了自己的私家车,而酒后驾车造成的交通事故也屡屡发生。鉴于人们对醉酒驾车的逐渐重视,关于酒精检测的课题便引起了广泛的关注。因此需要设计一种智能仪器,能够监测驾驶员体内酒精含量并能起到防酒后驾驶的作用。
本课题研究是以MQ2气敏传感器、AD0832模数转换器和AT89C52单片机为核心,通过MQ2采集并监测驾车者呼出气体中酒精浓度来反映血液中酒精浓度,并以声光报警及1602LCD显示的形式提示是否有酒后驾驶的行为。依据国家相关规定,当呼出气体酒精浓度超过阀值时,利用继电器锁死发动机点火开关。系统还采用LM324集成运放电路触发进入低功耗状态。实验与实测表明,系统可以监测气体中酒精浓度,分辨率基本达到实用要求。
关键词 MQ2气敏传感器;AD0832;AT89C52
Abstract:In recent years, as China's economic development, people's living standards improve, more and more families have their own private cars and traffic accidents caused by drunk driving is also frequent.Given people's increasing emphasis on the drink driving, alcohol test subject has aroused widespread concern.Therefore ,we need to design an intelligent instruments to monitor drivers for alcohol content and can play a role in anti-drunk driving.
This study is based on MQ2 gas sensors, AD0832 and AT89C52 microcontroller, collecting concentration by MQ2 and monitoring drivers exhald gas to reflect the alcohol concentration in the biood, and alarming by sound and light, and prompting in the form of LCD1602 display if there is a drunk driving behavior.According to the relevant provisions of the state,When the exhaled gas alcohol concentration exceeds a threshold, using relay lock the engine ignition switch. The system also uses the LM324 integration op-amp circuit triggers into low power state.Experiment and measurement show that the system can monitor the gas in the alcohol concentration, and the resolution is meeting practical basic requirements.
Key words MQ2 gas sensor AD0832 AT89C52
防酒后驾驶控制系统设计过程主要分为以下几个章节:
(1)绪论:介绍课题研究的背景及目前国内外防酒后驾驶控制系统的发展现状。
(2)气体酒精浓度检测技术及方案论证:介绍气体酒精浓度检测技术和防酒后驾驶系统的设计依据及要求,并对每个模块进行方案论证。
(3)防酒后驾驶控制系统的硬件设计:介绍防酒后驾驶控制系统总体设计以及各个模块设计,其中包括以下模块:AT89C52单片机模块、MQ2酒精传感器模块、LCD1602显示模块、AD0832转换模块、LM324运放模块、声光报警模块、继电器控制模块。
(4)防酒后驾驶控制系统软件设计:介绍系统软件设计的总体思路以及各个功能模块的设计流程及设计思路,并对系统进行软件仿真。
(5)系统调试与测试:对系统进行调试,介绍测试方法和过程,并对测试结果进行分析。通过系统调试,实现基本的功能。
(6)总结与展望:对本次设计进行总结,针对不足进行完善。