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机电综合应用

题 目：温湿度、酒精浓度、烟雾浓度检测报警系统

系部名称： 信息工程系 专业班级： 测控08班 学生姓名： 学 号： 指导教师： 教师职称： 讲师

2011年 12 月 29 日

信息商务学院课设论文

摘 要

酒精泄露的检测、监控以及对酒后驾车的检测对居民的人身和财产安全都是十分重要且必不可少。资料显示，我国近几年发生的重大交通事故中，有将近三分之一是有酒后驾车引起的。为了防止机动车辆驾驶人员酒后驾车，现场实时对人体呼气中酒精含量的检测已日益受到重视，酒精浓度测试仪逐渐得到广泛应用。此外，酒精测试也可应用于食品加工、酿酒等需要监控空气中酒精浓度场合。如今，气体传感器向低功耗、多功能、集成化方向的发展，因此，酒精浓度检测仪具有十分广阔的现实市场和潜在的市场要求。烟雾报警器就是通过监测烟雾的浓度来实现火灾防范的，烟感器内部采用离子式烟雾传感，离子式烟雾传感器是一种技术先进，工作稳定可靠的传感器，被广泛运用到各种消防报警系统中，性能远优于气敏电阻类的火灾报警器。本文运用了单片机，并借助相应的外围电路，将检测结果通过LCD、LED等显示方法告知使用者。本设计用的MQ303酒精传感器就是一种对气体敏感的化学传感器，以及MQ-2烟雾浓度传感器，它们随着外部气体的浓度不同而改变敏感膜的电阻。系统选STC89C52RC单片机为控制核心，对检测到的气体状况进行相应的处理分析、处理和显示，并能够实现超限报警。

关键字： 酒精传感器，烟雾传感器，STC89C52单片机，显示报警

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信息商务学院课设论文

Alcohol smoke sensor reports

Abstract

Alcohol, leak detection, monitoring and drunk driving detection on Residents' personal and property safety is very important and essential. Data shows, our country in last few years the major traffic accidents, there are nearly 1/3 is a drunken driving. In order to prevent the motor vehicle drivers drunk driving, live on human breath alcohol content detection has received increasing attention, alcohol concentration test instrument widely used. In addition, alcohol test can also be used in food processing, wine and other need to monitor air alcohol concentration.Nowadays，the gas sensor to low power, multi-function, integrated development， therefore, the alcohol concentration detector has a very broad market and potential market demand. The smoke alarm is by monitoring the smoke concentration to achieve fire prevention, smoke detectors, the internal use of ion smoke sensor, ion smoke sensor is a kind of advanced technology, stable and reliable operation of the sensor， is widely used in all kinds of fire alarm system, performance far superior to the gas sensing resistance type fire alarm.This paper uses the single chip microcomputer, and with the aid of the peripheral circuit, the detection results by LCD, LED and other display methods to inform the user of. The design of the MQ303 alcohol sensor is a kind of gas sensitive chemical sensor, as well as MQ-2 smoke concentration sensor, with external gas concentrations or in different sensitive membrane resistance， Selection of STC89C52RC MCU as the control core, the detected gas condition corresponding treatment analysis, processing and reality, and through the alarm to prompt.

Keywords: alcohol sensor smoke sensor single chip STC89C52 display alarm

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