基于单片机酒精浓度测试毕业论文

题目：基于单片机酒精浓度测试仪摘要2000年以来，随着中国经济的高速发展，人民生活水平的迅速提高，中国逐渐步入“汽车社会”，酒后驾车行为所造成事故越来越多，对社会的影响也越来越大，酒精正在成为越来越凶残的“马路杀手”。据有关资料统计，全世界每年因车祸丧生的人数就超过60万人，留下永久性伤残者在400万以上，一般受伤者则不计其数。在许多国家，车祸已成为第一位意外死亡原因。此外，因为交通事故造成的经济损失也相当惊人。据事故调查统计，大约50%—60%的车祸与饮酒有关。中国公安部门在2009年8月，在全国各地加强查处酒后驾驶的力度，以减少由酒后驾驶造成的恶性交通事故。要查处就涉及到检测人体内的酒精含量和使用设备来进行检测的问题。本文研究设计了一种用于公共场所具有检测及超限报警功能的酒精浓度智能测试仪。其设计方案基于89C51单片机，MQ3酒精浓度传感器。系统将传感器输出的4~20mA的标准信号通过以AD0832为核心的A/D转换电路调理后，经由单片机进行数据处理，最后由LCD显示酒精浓度值。文中详细介绍了数据采集子系统、数据处理过程以及数据显示子系统和报警电路的设计方法和过程。系统对于采样地点超出规定的酒精浓度时二极管报警电路提醒监测人员。同时，操作人员对于具体报警点的上限值可以通过单片机编程进行设置。关键词：酒精浓度传感器（MQ3）；MCU；A/D转换器；软件设计；硬件设计桂林电子科技大学毕业设计（论文）报告纸AbstractSince2000,withChina'srapideconomicdevelopmentandtherapidincreasepeople'slivingstandard,Chinahasgraduallysteppedintocarsociety,drinkdrivingaccidentcausedbymoreandmoreimpactonsocietyisalsogrowing,Alcoholisbecomingmoreandmorebrutalkillers.Accordingtostatistics,theworldwidenumberofpeoplekilledinroadaccidentseveryyearonmorethan60millionpeople,leftwithpermanentdisabilityof400millionormore,usuallytheinjuredwerenumerous.Inmanycountries,trafficaccidentshavebecomethefirstcauseofaccidentaldeaths.Inaddition,theeconomiclossescausedbytheaccidentisquiteamazing.Accidentinvestigation,accordingtostatistics,about50%-60%ofcaraccidentsandalcohol-related.China’sMinistryofPublicSecurityinAugust2009,aroundthecountrytostrengtheneffortstoinvestigateanddealwithdrinkdriving,toreducethedrinkdrivingaccidentcausedbythevicious.Toinvestigatethehumanbodyinvolvingthedetectionofalcoholanduseofequipmenttodetectproblems.Inthispaper,designapublicplaceforthedetectionandlimitalarmfunctionswithanalcoholconcentrationofintelligenttester.Thisdesign,basedonSTC89C51microcontrollerandMQ3alcoholconcentrationsensor.Systemsensoroutput4~20mAstandardsignalthroughAD0832coreA/Dconvertercircuit,afterconditioning,dataprocessingbytheMCU,thefinalalcoholconcentrationvaluefromtheLCDdisplay.Thispaperdescribesthedataacquisitionsubsystem,dataprocessinganddatadisplaysubsystemandalarmcircuitdesignmethodsandprocesses.Systemrequirementsforthesamplingsitesexceedingthealcoholconcentrationdiodereminderalarmcircuitmonitors.Meanwhile,theoperatorspecificalarmpointfortheupperlimitsetbyMCUprogramming.AlcoholtesterwillbringadrivingsignalpriortoasafeKeywords:Alcoholconcentrationsensor(MQ3);STC85C52MUC;A/Dconverter;Softwaredesign;Hardwaredesign桂林电子科技大学毕业设计（论文）报告纸目录引言...........................................................11.绪论.......................................................21.1酒精浓度检测仪开发背景..............................................................................................21.2酒精浓度检测仪的发展..................................................................................................21.3酒精浓度检测仪设计内容..............................................................................................22.方案器件简介................................................32.1MCU选择的简介............................................................................................................32.2数模转换器的简介..........................................................................................................52.3时钟芯片的简介..............................................................................................................72.4液晶显示器的简介..........................................................................................................83总体方案设计................................................93.1STC89C52单片机............................................................................................................93.2ADC0832数模转换.......................................................................................................103.3AT24C02存储器............................................................................................................103.4LCD1602液晶显示........................................................................................................103.5编译软件介绍................................................................................................................124硬件设计...................................................134.1最小系统的实现............................................................................................................134.2数据采集设计................................................................................................................154.3A/D转换设计.................................................................................................................164.4按键设计........................................................................................................................164.5外围扩充存储器电路....................................................................................................174.6时钟芯片电路................................................................................................................184.7LCD1602液晶显示设计................................................................................................194.8报警设计....................................................................................................