1、车载酒精测试控制电路的设计 I 摘要 近年来，随着我国经济的发展，人民的生活水平提高，越来越多的人有了自 己的车，而酒后驾车造成的交通事故也越来越多，国家也出台了一系列的法律法 规，试图通过法律的手段遏制这一现象的进一步发展。 介于人们对于醉驾的逐渐重视，酒精测试课题便更加受人关注。酒驾引起的 交通事故是由于司机饮酒过量造成酒精麻痹神经，使大脑反应迟钝，肢体不受控 制的症状。 所以本设计研究的是以气敏传感器和单片机为主， 监控空气酒精浓度， 并由 LCD 显示功能的空气酒精浓度测控电路。它可以监控空气中和呼气中酒精 浓度值，对超过设定值进行报警，并显示数值，来提示危险。 车载酒精测控电路的设计
2、可以达到以下目的：（1） 有利于社会公共交通安全； （2）有效的降低交通事故的发生率;（3）使酒精测控变得更加便捷、安全、准 确、高效，便于家庭酒精测控器的普及化。 关键词：STG89C52; ADC0804 ; 酒精传感器 MQ-3； 继电器 车载酒精测试控制电路的设计 II Abstract This year, with Chinese economic development, peoples living standards improve, more and more people have their own cars, traffic accidents caused by d
3、runk driving more and more, countries have also introduced a series oflaws and regulations, in an attempt to curb the further development of this phenomenon through legal means. Between the increasing emphasis on drunk driving, alcohol test subject will be more peoples minds. Traffic accidents cause
4、d by drunk driving is the driver drinking excessive amounts of alcoholic paralysis of nerves, the brain is unresponsive, physically out of control symptoms. Therefore, this research project is a gas sensor and microcontroller-based, monitoring air alcohol concentration, the LCD display the functions
5、 of the air alcohol concentration measurement and control instrument. It monitors the air and breath alcohol concentration exceeds a set value alarm, and displays the value, to prompt dangerous. Car alcohol monitoring and control of the design can achieve the following objectives: (1) in favor of so
6、cial and public transportation security; (2) effectively reduce the incidence of traffic accidents; (3) alcohol monitoring and control has become more convenient, safe, accurate and efficient, to facilitate the popularization of home alcohol monitoring and control. Keyword: Microcontroller; the ADC0804; MQ-3 Alcohol Sensor; relay 车载酒精测试控制电路的设计 II 目录目录 1 绪论 1 1.1 设计背景. 1 1.2 气敏传感器的研究现状. 1 1.3 设计酒精浓度测试控制电路的意义 2 2 硬件电路设计与实现 4 2.1 系统硬件设计原理图分析. 4 2.2 单片机模块. 5 2.4 酒精传感器模块. 9 2.5 液晶显示模块. 12 2.6 系统功
