摘要PAGEI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私家车,而酒后驾车造成的交通事故也频频发生｡机动车驾驶人员“酒后驾车”极易发生道路交通事故,严重危害了道路交通安全和人民生命财产安全｡人饮酒后,酒精通过消化系统被人体吸收,经过血液循环,约有90%的酒精通过肺部呼气排出,因此测量呼气中的酒精含量,就可判断其醉酒程度｡本设计实现了对不同浓度酒精的检测和显示,通过适当改进可以用于检测酒后驾车｡本文用AT89S51单片机与MQ-3型气体传感器实现了对酒精浓度的测量,并对测量数据进行显示,同时利用二极管简单显示浓度的高低,在设计允许值时发出报警｡关键词:传感器;酒精探测仪;单片机;模-数转换AbstractPAGEIIAbstractInrecentyears,asChina'seconomicdevelopment,people'slivingstandardsimprove,moreandmorepeoplehavetheirownprivatecarsandtrafficaccidentscausedbydrunkdrivingisalsofrequent.Driverdrivesveryeasytohappentrafficaccidentafterdrinkingwhichendangertrafficsafetyandpeoplesafetyoflifeandpropertyseriously.Afterpeopledrink,thealcoholisabsorbedbythehumanbodythroughthedigestivesystem,throughthebloodcirculation,nearlyithavedischargeexhalinglungalcoholof90%.Someasurethecontentofalcoholwhileexhaling,canjudgeitsdrunkdegree.Differentconcentrationsofalcoholsolutionaredetectedandshowedinthedesign.Thedesigncanbeusedtothedetectionofdrunkdrivingthroughimprovement.Inthisthesis,theconcentrationofalcoholcanbemeasuredanddisplayedbyusingthegassensorbasedonAT89S51MCUandMQ-3.AtthesametimetheconcentrationisdisplayedbyLED,andthesystemallowtoalarminthecertainvalue.Keywords:SensorAlcoholdetectorMicroControllerUnitAnalogtoDigitalConvert目录目录TOC\o"1-3"\h\z\uHYPERLINK\l"_Toc326759880"摘要PAGEREF_Toc326759880\hIHYPERLINK\l"_Toc326759881"AbstractPAGEREF_Toc326759881\hIIHYPERLINK\l"_Toc326759883"1绪论PAGEREF_Toc326759883\h1HYPERLINK\l"_Toc326759884"1.1酒精测试仪设计的目的及意义PAGEREF_Toc326759884\h1HYPERLINK\l"_Toc326759885"1.2数据采集技术的原理PAGEREF_Toc326759885\h1HYPERLINK\l"_Toc326759886"1.3传感器基础知识PAGEREF_Toc326759886\h2HYPERLINK\l"_Toc326759887"1.3.1传感器的定义PAGEREF_Toc326759887\h2HYPERLINK\l"_Toc326759888"1.3.2传感器的分类PAGEREF_Toc326759888\h2HYPERLINK\l"_Toc326759889"1.3.3传感器的特性PAGEREF_Toc326759889\h3HYPERLINK\l"_Toc326759890"2酒精测试仪总体方案设计PAGEREF_Toc326759890\h5HYPERLINK\l