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1、 HUNAN UNIVERSITY毕 业 论 文论文题目基于单片机的酒驾检测仪设计 学生姓名学生学号专业班级测控技术与仪器1101学院名称电气与信息工程学院指导老师学院院长2015 年 6 月 7日基于单片机的酒驾检测仪设计摘 要自改革开放以来，人均收入日益提高，汽车已然成为每个家庭的一部分，伴随着人们的日常出行活动，为现代生活提供了极大的便利。但另一方面的问题也随之出现，人们驾车外出活动应酬常常导致酒后驾驶，也会因此造成交通事故的频繁发生。国家也因此在刑法中设立了管理酒驾的相关条例。至此，对酒驾的检测与判断显得尤为重要，而能够检测司机体内酒精含量的智能仪器是重要保证。 本次设计的重点部分是以
2、传感器、单片机为核心的硬件实体部分和软件控制部分。该系统采用半导体酒精传感器，AT89S52单片机，LCD12864液晶显示屏、外部存储器、通信接口等模块来完成具有检测与报警功能的酒驾检测仪。其中利用气敏半导体传感器对酒精浓度进行检测，对其输出信号进行A/D转换传到单片机，根据单片机和外围电路对接收信号的判断之后，在显示模块显示酒精浓度数值，并可根据不同情况设定检定值来判断司机是否酒驾醉驾，最后将数据记录到存储器中。论文首先对酒驾检测系统研究的背景和意义做了阐述，对酒驾检测系统的效益和未来做了分析。其次分析了智能酒驾检测系统整体设计方案，对系统设计原理及结构功能做详细介绍了。之后介绍了系统的硬
3、件设计原理，仔细分析介绍了器件的选用，各个部分的实现方案。还介绍了检测系统的软件设计原理，并介绍了程序的功能模块及其流程图。最终给出智能酒驾检测系统的仿真结果。仿真结果表明，该系统能够对酒驾有着准确地测定，并显示结果，并可应用于绝大多说有检测需要的场合。关键词：智能酒驾检测；AT89S52单片机；酒精传感器；MQ-3传感器The system of intelligent detector of drunk drivingAbstractSince the reform and open up，GNP per capita is raising rapidly，home car has bee
4、n part of our daily travel,and offered a lot of conveniences.But on the other hand, the problems have appeared, people drive out often lead to drunk driving and cause traffic accidents.Thus, detection of drunk driving is particularly important.The key part of this design is the hardware part of SCM,
5、 sensors as the core part and the control part of software.The system adopts the semiconductor alcohol sensor, AT89S52 MCU, LCD display, LED and other modules to complete a set of detection and alarm system for drunk driving.The use of semiconductor gas sensors to detect the concentration of alcohol
6、, the output signal A/D conversion to the MCU, after the judgment of MCU and peripheral circuit according to the received signal, the display module display the alcohol concentration value, and according to the different situation to set calibration value to determine whether the driver is drunk dri
7、ving.Firstly, the background and significance of drunk driving detection system are expounded and the benefits of drunk driving system in future are analyzed.Followed by analysis of the overall design scheme of intelligent wine driving detection system, introduced the design principle of the system
8、structure and function in detail.After the introduction of the design principle of the hardware system, introduced each part of the device, and why did the selection. introduced the software design of the detection system, and introduced the flow chart of the program.The simulation results are given
9、 in the end of intelligent drunk driving detection system. The simulation results show that, the system can have the accurate determination of drunk driving, and displays the result, and can be applied to most testing needed. Key Words： Intelligent detection of drunk driving、MCU、Sensor of alcohol目 录1 绪论.1 1.1 酒驾检测的背景和意义.1 1.1.1研究背景.11.1.2研究意义.21.2 酒驾检测的效益和前景.2 1.3 论文主要研究内容.41.4 本章小结.52 酒驾检测仪总体方案.62.1 总体设计思路.52.2 传感器选型.62.3 显示屏选型.62.4 A/D转换器选型.72.6 外部数据存储器.82.6 处理器选型 .82.6.1 单片机选择.82.6.2 AT89的功能特点.82.7通信模块接口选择.
