I车载酒精浓度监控设备设计专业班级：电子信息工程0901学生姓名：张雪清指导教师：陈勇职称：讲师摘要近年来,我国汽车保有量在不断增长,与此同时,车辆运行带来的交通事故发生率也不断攀升。在诸多交通事故当中,有很多人为因素构成了交通安全隐患。其中,由酒后驾驶所造成的人员伤亡及财产损失首当其冲。但是现阶段,为了减少或杜绝酒后驾驶行为,交管部门通常只是采用呼气酒精测试仪对驾驶人员进行现场检测,以确定驾驶人员是否饮酒以及酒精含量。这种方法由于它没有安装在汽车内部,只能由交通监管人员设卡实施,所以造成检测速度缓慢,常常影响道路交通的正常运行。而且,设卡检测具有很大的随机性,也使许多酒后驾驶行为逃避了监控。因此,并不能从根本上杜绝酒后驾驶的违章行为,酒后驾驶现象仍时有发生生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IIICaralcoholmonitoringdevicedesignAbstractTheincreasebasedonvehiclePopulationbringstheincreaseofcarincidentsyearsbyyears.Amongthereasonswhichcausetheincident,drunkdriveabsolutelybearsthebruntofanydanger.Bynow,todecreasethePhenomenaofdrunkdrive,theonlyway15usingalcoholexaminertodeterminewhetherthedriverdrunkornotinthefieldbytrafficpolice.Becausetheexaminerdevice15notassembledinthecar,sopolicemanhastoholdthedevicetoeffectonbyone.Byusingthiskindofmethod,trafficjamsoccursquiteoftenbecauseofefficiency.Sotobethedrunkdriveforbiddenishardtoachieve.Betweentheincreasingemphasisondrunkdriving,alcoholtestsubjectwillbemorepeople'sminds.Trafficaccidentscausedbydrunkdrivingisthedriverdrinkingexcessiveamountsofalcoholicparalysisofnerves,thebrainisunresponsive,physicallyoutofcontrolsymptoms.Therefore,thisresearchprojectisagassensorandmicrocontroller-based,monitoringairalcoholconcentration,theLCDdisplaythefunctionsoftheairalcoholconcentrationmeasurementandcontrolinstrument.Itmonitorstheairandbreathalcoholconcentrationexceedsasetvaluealarm,anddisplaysthevalue,topromptdangerous.Caralcoholmonitoringandcontrolofthedesigncanachievethefollowingobjectives:(1)infavorofsocialandpublictransportationsecurity;(2)effectivelyreducetheincidenceoftrafficaccidents;(3)alcoholmonitoringandcontrolhasbecomemoreconvenient,safe,accurateandefficient,tofacilitatethepopularizationofhomealcoholmonitoringandcontrol.Keyword:Microcontroller;theADC0804;MQ-3AlcoholSensor;relayIIIII目录第一章绪论......................................................11.1设计背景...................................................11.2气敏传感器的研究现状.......................................21.3设计酒精浓度测试控制电路的意义.............................3第二章硬件电路设计与实现.....................................42.1系统框图...................................................42.2单片机模块.................................................52.3模数转换器模块.............................................62.4酒精传感器模块.............................................82.5液晶显示模块..............................................11第三章系统的硬件设计.....................
