基于at89s51单片机酒精浓度探测仪的设计与实现

毕业设计（论文）基于AT89S51单片机酒精浓度探测仪的设计与实现学院（系）理学院物理系专业班级电子信息科学与技术0502班学生姓名指导教师学位论文原创性声明本人郑重声明所呈交的论文是本人在导师的指导下独立进行研究所取得的研究成果。除了文中特别加以标注引用的内容外，本论文不包括任何其他个人或集体已经发表或撰写的成果作品。本人完全意识到本声明的法律后果由本人承担。作者签名年月日学位论文版权使用授权书本学位论文作者完全了解学校有关保障、使用学位论文的规定，同意学校保留并向有关学位论文管理部门或机构送交论文的复印件和电子版，允许论文被查阅和借阅。本人授权省级优秀学士论文评选机构将本学位论文的全部或部分内容编入有关数据进行G7828G13046，G2499以G18331用G5445印、G13565印或G6207G6563G12573复G2058G6175G8585保G4396和G8731编本学位论文。本学位论文G4658G11221、保G4506G3243，在G5192解G4506后G17878用本授权G10822、不保G4506G3243。G708G16843在以G990G11468G5224G7053G7706内G6183“”G709作者签名年月日导师签名年月日本科生毕业设计（论文）任务书设计（论文）题目基于AT89S51单片机酒精浓度探测仪的设计与实现设计（论文）主要内容G16213G8726G16786G16757并G4466G10628G980个G3534G1122AT89S51G2345G10267机的G18214G12946G8999G5242G6518G8991G1214G13007G13491，其中G18214G12946G1268G5875G3132G18331用MQ3G3423，G2045用G16825G1268G5875G3132将G18214G12946G8680体G8999G5242G1461G2507G17728G2282G1038电G1461G2507，选G6333G17878G5415的G6930G3835G3132G6930G3835其电G2399G1461G2507，G20549G2172发G1821G1120G7509管G7186G12046G18214G12946G8999G5242的G20652G5242，同G7114G2045用G8181数G17728G6454G14467G10267将G8181G6323G1461G2507进行G17728G2282，并由G2345G10267机G6523G2058，G7380后用数G11733管G7186G12046。要求完成的主要任务1、查阅不G4581G112215G12699的G11468关G17176G7021，其中G14533文文G10498不G4581G11222G12699，完成G5332G20076G6265G2590。2、G6496G6581C51G13007G2027G2345G10267机G2419理G2462编G12255G6228G7427，G10099G5725ADC0809的G5049作G2419理G2462特G5627G727G10099G5725数G11733管G7186G12046G6228G7427。3、用PROTELG13484G2058其G2419理G3282，完成G6984体电G17347的G4445G16025G994G16855G16809，并G4557G4466G20576G13479果进行分G7524。4、完成不G4581G11225000G4395的G14533文文G10498G13775G16805。5、完成不G4581G112212000G4395的G8617G1006论文。必读参考资料1G3G5364G3533G1173G3534G1122G8731编语言编G12255MCS51G2345G10267机G2419理G994G5224用M北京清华G3835学出版社，2003A1G32吴桂秀G1268G5875G3132G5224用G2058作入门M浙江科学G6228G7427出版社，2004指导教师签名系主任签名院长签名（章）本科学生毕业设计论文开题报告1、目的及意义（含国内外的研究现状分析）从18世纪产G1006革命以来，到20世纪G1461息G6228G7427的快速发展，G1268G5875G6228G7427逐渐走向成G10099，在G10628G4466生产生活中的G5224用也渐渐在普G2462。G1268G5875G3132G5224用广泛，在各个领域都有着举足轻重的作用，所以G1268G5875G3132不断向G20652G12946G5242，G20652G2499靠G5627，微G3423G2282，微功耗无源G2282和智能G2282数G4395G2282发展，以便更好的服务G1122我们的生产和生活。G8680体G994人类的日常生活G4506切G11468关，G7828G8991G8680体是保护和改善我们居住环境的必G16213G5049作，G16213G7828G8991G8680体就G4581不了用到G8680体G1268G5875G3132。本G16786G16757G3534G1122AT89S51G2345G10267机G16786G16757的G18214G12946G8999G5242G6518G8991G1214，G2499用来G7828G8991G18214G12946G8680体G8999G5242，G7380主G16213的用途是G7828G8991司机的G18214G12946含量。G5332车司机只G16213将嘴G4557着G1268G5875头使劲吹G8680，G1214G3132就能发G990G7186G12046出G18214G12946G8999G5242的G20652低，从而判断G16825司机是否G18214后驾车，避免事故的发生。G5415然，G7380好的办法是在车内G4445G16025这种G8991G16809G1214，司机G980进入车内G7828G8991G1214就G7828G8991司机的G18214G12946含量，如果超出允许值，G13007G13491G6523G2058引擎无法启G2172，这样就G2499从根本G990解决G18214后驾车问G20076。G18214G12946G8999G5242G6518G8991G1214在生产中也有重G16213的G5224用，比如，在G980些环境G16213G8726严格的生产车间，用这种G18214G12946G8999G5242G6518G8991G1214，G2499随G7114G7828G8991车间内的G18214G12946G8680体G8999G5242，G5415G18214G12946G8680体G8999G5242G20652G1122允许限定值G7114G16213G2462G7114通风G6454G8680，做到G4445全生产。G5415然，依照同样的G2419理也G2499G16786G16757G7828G8991其他G8680体的G6518G8991G1214，G994我们的生活息息G11468关的是G7828G8991有毒G8680体。G1268G5875头是G18214G12946G8999G5242G6518G8991G1214中G5875受G18214G12946的重G16213部分。目前，所G16786G16757的G16825类G1268G5875G3132多选用以G1120氧G2282锡G1038G3534本材G7021，添加不同物质G2058成的G8680G6947G1268G5875G3132。本G16786G16757所选用的MQ3G8680G6947G1268G5875G3132的G6947G5875部分是由G1120氧G2282锡的NG3423G2334导体微G7242G9915G13479G4630构成，G9801G6947G5242G20652，G2721G5224速G5242快，G2499靠G5627好。也有选G6333以其他氧G2282物G1038G3534本材G7021G2058成的G1268G5875G3132，如选G1120氧G2282G19055作G1038G8680体G1268G5875材G7021。G15441然目前的G1120氧G2282G19055G15192G14192有电G19471值G20652，G5049作G9213G5242G20652，G6947G5875G5627G5058的G13582G9869，G1306是G1120氧G2282G19055G15192G14192G1867有G14403好的电学G5627能，优G5334的G1821学G5627能，G2282学G12295定G5627G20652，机G7812G5390G5242G20652，G1000G2499用G1122多种G8680体的G7828G8991。G2345G10267机在G6984个G1268G5875G3132中G17227G6817作和G11468G5224数据G3800理并送G7186G12046的作用，是G1268G5875G3132的G7692G5527部分。目前，G8680G6947G1268G5875G3132已有G17751G20652的G12946G5242，G2499G17810G987分G1055G980以G990。随着G7044材G7021发展和G7044加G5049G6228G7427的G6564G20652，有了G20652G2499靠G5627和低功耗的G8680体G1268G5875G3132。智能G2282数G4395G2282的G8680体G1268G5875G3132G1823服了目前G8680G6947G1268G5875G3132人G5049G8991G16809G5114来的G6940G10587低，G16835G5058G3835和G6817作人G2604G19283G7114间G5049作G12573问G20076。2、基本内容和技术方案G6947G5875部分由G1120氧G2282锡的NG3423G2334导体微G7242G9915G13479G4630构成的MQ3G3423G8680G6947G1268G5875G3132，G5415其表G19766G2572G19480有被G8991G8680体G18214G12946分子G7114，表G19766导电电子比G1375就G1262发生G2476G2282，从而其表G19766电G19471G1262随着被G8991G8680体的G8999G5242的G2476G2282而G2476G2282。由G1122这种G2476G2282是G2499G17882的，所以能重复使用。MQ3G3423G8680G6947G1268G5875G3132G9801G6947G5242G20652，G2721G5224速G5242快。AT89S51G2345G10267机是G980G14336G6523G2058G5224用的8位G2345G10267机。G14467G10267内部有G7114G19059G6403G14645G3132，只G16847G4396G1660G3132G10384KG4395G14422，外部G2499G6205G1817G1427964KG4395G14422，128G4395G14422的随机G4396G1660G3132，外部G2499G6205G1817G1427964KG4395G14422。32G7477G2464向G17767入G17767出G13459，G8611G7477G3355G2499以G2345独做I/O的G6523G2058。5个中断向量源。2个独立的16位定G7114G3132。1个全G2464G5049G1030行通G1461G12483G2487。选用的G5332发G5191G2500G1038MEDWING2345G10267机集成G5332发环境。发G1821G1120G7509管G7186G12046选用集成G20549G2172G3132LM3914。内部有10个电G2399比G17751G3132，G2499G20549G217210个发G1821G1120G7509管。G11468G18063分G2399G12483G1055间的电G2399G5058是012V。G2499选G6333G9869G10378G7186G12046也G2499选G6333G7477G10378G7186G12046。ADC0809G10388G173478位的A/DG17728G6454G3132，G1867有G17728G6454G17227G1584G6523G2058G12483，G17728G6454G7114间G1038100S，G8181G6323G17767入电G2399值G14551G3272是0G7945V，5V电G2399G1391电。G989位数G11733管G7186G12046G1867体数值。根据以G990内容选定G6228G7427G7053G7708。G8680体G1268G5875G3132G17947到G18214G12946G8680体后，G19471值发生G2476G2282，所G16213G8991的电G2399发生G11468G5224的G2476G2282。G2476G2282的电G2399值送LM3914G6930G3835比G17751，G20549G2172G11468G5224的发G1821G1120G7509管发G1821，G7186G12046G18214G12946G8999G5242的G20652低。G2345G10267机不断G18331集经ADC0809G8181数G17728G6454后的G2476G2282的电G2399值，经数据G3800理交数G11733管G7186G12046。3、进度安排G1254413G2620查阅G11468关文G10498G17176G7021，明G11842研究内容，了解研究所G19668理论G11705识和G16786G16757所G19668的G1815G3132件。G11842定G7053G7708，完成G5332G20076G6265G2590。G1254446G2620G11023出G8981G12255G3282，编写G12255G5219。G12544710G2620G5326立G13007G13491G8181G3423，G11023出电G17347G3282，并G4557G17731件进行G1235G11507G16855G16809。G125441113G2620完成G11840件电G17347的G4445G16025，并进行G11840件电G17347的G16855G16809。G125441415G2620完成并G6564交论文，G4557论文进行G1474改定G12307。G1254416G2620完成并G1474改G8617G1006论文。G1254417G2620G1946G3803论文G12584G17789。4、指导教师意见G3G3G3G3G3G3G3G3G3G3G3G3G3G3G3G3G3G3G3G3G3G3G3G3G3G3G3G3G3G3G3G3G3G3G3G3G3G3G3G3G3G3G3G3G3G3G3G3G3指导G6957师G12626G2529G3G3G3G3G3G3G3G3G3G3G3G3G3G3G3G3G3G3G3G3G3G3G3G3G3G3G3G3G3G3G3G3G3G3G3G3G3G3G3G3G3G5192G3G3G3G3G3G7388G3G3G3G3日G3A2A0A3A4A6A7A5A9目录G6700G16213IABSTRACTII1G13502论111G16786G16757G13984G7235112G8680G6947G1268G5875G3132的研究G10628G10378113G16786G16757G18214G12946G8680体G1268G5875G3132的意G1053214本文主G16213研究G5049作22G11840件电G17347G16786G16757G994G4466G10628421G2345G10267机G5332发G8981G12255422G11840件G13007G13491G7706G3282423G1461G2507G18331集电G17347524G1461G2507G17728G6454电G17347825发G1821G1120G7509管G7186G12046G6265G16698电G173471426数G11733管G7186G12046电G173471627G13007G13491G6984体电G17347G3282183G17731件编G122552031G5332发环境2032G12255G5219G8981G122552033G12255G5219G1207G11733编写224电G17347G16855G16809G994G8991G16809G13479果2841电G17347G16855G168092842G8999G5242G994G7186G12046G1055间的关G13007295G13479G7475语33G2454G13783文G1049834G19480G541735G14280G1688638A2A0A3A4A6A7A5A9I摘要本G16786G16757G4466G10628了G4557不同G8999G5242G18214G12946的G7828G8991和G7186G12046，通G17819G17878G5415改进G2499以用G1122G7828G8991G18214后驾车。本文用AT89S51G2345G10267机G994MQ3G3423G8680体G1268G5875G3132G4466G10628了G4557G18214G12946G8999G5242的G8991量，并G4557G8991量数据进行G7186G12046，同G7114G2045用G1120G7509管G12628G2345G7186G12046G8999G5242的G20652低，在G16786G16757允许值G7114发出G6265G16698。论文主G16213研究了G7081G709G11840件G7053G19766，MQ3G8680体G1268G5875G3132G6228G7427G2454数的G7828G8991和将G4439G6521入到G18214G12946G8999G5242G7828G8991G8181G3371中G727将G8181G6323电G2399G1461G2507G6930G3835G20549G2172发G1821G1120G7509管G9869G1154G6265G16698G727将G18331集到的G8181G6323电G2399G1461G2507通G17819G2345G10267机G6523G2058经A/DG17728G6454，得到数G4395电G2399G1461G2507G727用G1122G7186G12046G8999G5242的数G11733管G7186G12046G8181G3371。G7082G709G17731件G7053G19766，主G16213研究了电G2399到G8999G5242的G13459G5627G17728G6454和G7380G13468G8999G5242值的数G11733管G7186G12046。G7083G709G4557G16786G16757的G1268G5875G3132进行了标定。G16786G16757的G1268G5875G3132G4557G18214G12946G8680体G2465G5224G9801G6947，能在有G6940G14551G3272内G8991量G4439的G8999G5242值。并G1000在G7828G8991低G8999G5242G18214G12946G7114G16835G5058G17751G4579，G7380G3835G16835G5058G103882G9397足G16786G16757G16213G8726。本文的特色在G1122标G1946的G11842定。G4557G1122G8981G2172空G8680，样品的G12295定G5627和水蒸G8680的G5445G2721，G6564出了解决G7053G7708和G20576证G7053法。G4557不同的区间G8999G5242和电G2399G17728G6454关G13007做G13459G5627G2282G3800理，G12628G2282了G11840件电G17347的G16786G16757。G16786G16757的G1268G5875G3132G2499以G7828G8991不同G8999G5242的G18214G12946G8680体，改进G1055后G4557解决G18214后驾车事故和特殊场合G18214G12946G7828G8991都G2499以使用。关键词G8680体G1268G5875G3132，G8181数G17728G6454，G2345G10267机A2A0A3A4A6A7A5A9IIABSTRACTDIFFERENTCONCENTRATIONSOFALCOHOLSOLUTIONAREDETECTEDANDSHOWEDINTHEDESIGNTHEDESIGNCANBEUSEDTOTHEDETECTIONOFDRUNKDRIVINGTHROUGHIMPROVEMENTINTHISTHESIS,THECONCENTRATIONOFALCOHOLCANBEMEASUREDANDDISPLAYEDBYUSINGTHEGASSENSORBASEDONAT89S51MCUANDMQ3ATTHESAMETIMETHECONCENTRATIONISDISPLAYEDBYLED,ANDTHESYSTEMALLOWTOALARMINTHECERTAINVALUEINTHETHESISMAJORRESEARCHESARETHREEPOINTS1INTHEHARDWARE,DETECTINGTHETECHNOLOGYPARAMETERSMQ3GASSENSOR,ANDCONNECTINGITTOATESTINGPARTOFTHEALCOHOLGASCONCENTRATIONANALOGVOLTAGESIGNALAMPLIFICATIONTODRIVELIGHTEMITTINGDIODELIGHTTOALARMCONVERSINGTHEVOLTAGESIGNALTHROUGHTHEA/DCONVERSIONATTHECONTROLOFTHESINGLECHIP,OBTAININGTHEDIGITALVOLTAGESIGNALDISPLAYINGTHECONCENTRATIONINTHEDIGITALTUBEDISPLAYMODULE2INTHESOFTWARE,LINEARCONVERSIONBETWEENTHECONCENTRATIONOFTHEALCOHOLANDTHEVOLTAGEANDTHEDIGITALDISPLAYOFTHEFINALCONCENTRATIONVALUE3THEDESIGNEDSENSORISCALIBRATEDTHEDESIGNOFGASSENSORISRESPONSIVETOTHEALCOHOL,CANMEASURECONCENTRATIONINTHEEFFECTIVERANGEOFITSCONCENTRATIONANDINTHELOWCONCENTRATIONOFALCOHOLINTHETESTTHEERRORISSMALLWITHTHEMAXIMUMERROR82,MEETINGREQUIREMENTSOFTHEDESIGNTHECHARACTERISTICSOFTHETHESISARETODETERMINETHESTANDARDTHESOLUTIONSANDVERIFICATIONMETHODSAREPROPOSEDABOUTTHEFLOWOFAIRSAMPLES,THESAMPLESTABILITYANDWATERVAPORTHECONVERSIONBETWEENVOLTAGEANDCONCENTRATIONINDIFFERENTRANGEISTREATEDASLINEARRELATIONSHIPTHEDESIGNOFSENSORCANDETECTDIFFERENTTHEALCOHOLGASWITHDIFFERENTCONCENTRATIONITPLAYSANIMPORTANTROLETOSOLVETHEDRUNKDRIVINGACCIDENTSANDALCOHOLTESTINGFORSPECIALOCCASIONSAFTERIMPROVEMENTKEYWORDSGASSENSOR,A/DCONVERSION,SINGLECHIPMICROCOMPUTERA8A10A11A12A13A14A15A1611绪论11设计背景我国G1268G5875G3132市场的增G19283G10587超G1781915，2003G5192销售额G1038186亿G1815人民币，2006G5192销售额G1038283亿G1815人民币，预G167572007G5192G1038325亿G1815人民币，2008G5192G1038374亿G1815人民币。我国G1268G5875G31324G3835类中，G5049G1006和汽车电子产品占市场份额的335。近G5192来，G1268G5875G3132正G3800G1122G1268G13491G3423向G7044G3423G1268G5875G3132G17728G3423的发展阶G8585，G7044G3423G1268G5875G3132的特G9869是微G3423G2282、数G4395G2282、智能G2282、多功能G2282、G13007G13491G2282、网络G2282，G4439将不仅促进G13007G13491产G1006的改造，而G1000G2499导G14280G5326立G7044G3423G5049G1006和军事G2476革，是21世纪G7044的经济增G19283G98691。由G1122G8680体G994人类的日常生活G4506切G11468关，G4557G8680体的G7828G8991已经是保护和改善生态居住环境不G2499G13582G4581的G6175G8585，G8680体G1268G5875G3132发挥着G7509其重G16213的作用。G8680体G1268G5875G3132是把G8680体中的特定成分G7828G8991出来，并G17728G2282G1038电G1461G2507的G980类G3132件，用来G4557有害G8680体，易燃易爆G8680体G12573进行G4445全G7828G8991和G6265G16698，G4557生产生活中G19668G16213了解的G8680体进行G7828G8991，分G7524，研究G12573。近G5192来，我国G8680G6947G1268G5875G3132产G1006有了G17751快的发展，G1306G994国外G11468比，从G6228G7427水G5191，产G1006G2282G2462G5224用G12573领域G3355G4396在着不G4579的G5058距。目前，G8680G6947G1268G5875G3132领域还G4396在G980些问G20076。G980是G1815件的G12295定G5627G5058。由G1122G1815件电G19471和G9801G6947G5242随G7114间而不断G2476G2282，漂移G3835给G7828G8991G13479果的G2499靠G5627G5114来不G12295定的因素。G1120是选G6333G5627G5058。由G1122在G7828G8991G8680体G7114，往往还G4396在着其G4439的干扰G8680体如烟G18214G12573，使G8680G6947G1815件发生交叉G2721G5224，产生G16835G6265。G989是催G2282剂中毒。掺有催G2282剂的G8680G6947G1815件G6521触某些G8680体后，活G5627组分被毒G2282，将G1262改G2476G1815件的选G6333G5627，降低其G6947G5875G5242和G12295定G5627，另外催G2282剂本身也G4396在着不G12295定G5627问G20076。G9801G6947G5242问G20076。四是SNO2G1815件有G7114由G1122G9801G6947G5242G17819G3835导G14280G16835G6265，G1306是在G7828G8991某些低G8999G5242G8680体G7114G9801G6947G5242却难以G17810到G16213G87262。12气敏传感器的研究现状G8680G6947G1815件G5627能G994G6947G5875功能材G7021的种类、G13479构G2462G2058作G5049艺G4506切G11468关。用金G4658氧G2282G6947G5875材G7021G2058作的G2334导体式G8680G6947G1815件G1867有G9801G6947G5242G20652，G13479构G12628G2345，体G4579质轻，坚固耐用G12573优G9869而得到广泛的G5224用，目前仍以SNO2材G7021G1038主3。SNO2是G980种广普G3423的G8680G6947材G7021，G3272绕SNO2G1038G3534体材G7021的G8680G6947材G7021的G2058G3803G2462其G8680G6947G1815件G2058G3803的研究课G20076十分活跃。纯SNO2的G8680G6947特G5627不甚好，尤其是G4439的热G12295定G5627不G20652。G1038改善其G8680G6947特G5627，常在SNO2G3534体中掺入贵金G4658或其他金G4658氧G2282物。尽管SNO2G3534G1268G5875材G7021G1867有许多优G9869，作G1038材G7021也G4396在G980定G13582G9869。通G17819G6523G2058G8680G6947材G7021微粒G3835G4579，颗粒纳米G2282，掺杂其G4439添加剂或催G2282剂，G2045用G17819滤G16786G3803或透G8680G14192来获得选G6333G5627，G6523G2058G5049作G9213G5242G2462环境湿G5242G5445G2721，改进G2058G3803G12573G7053法G2499以改善SNO2G1268G5875G3132的G8680G6947G5627能4。纳米科学G6228G7427NANOST是研究尺寸在01100NM的物质组成体G13007的运G2172规律和G11468A17A18A19A20A21A22A23A242互作用以G2462G2499能的G4466际G5224用中的G6228G7427问G20076的科学G6228G7427。纳米G6228G7427的发展，不仅G1038G1268G5875G3132G6564G1391了优G14403的G6947G5875材G7021，而G1000G1038G1268G5875G3132G2058作G6564G1391了许多G7044G3423G7053法。纳米固体材G7021G1867有庞G3835的界G19766，G6564G1391了G3835量G8680体通道，从而G3835G3835G6564G20652了G9801G6947G5242，G5049作G9213G5242G3835G3835降低，G3835G3835G13565G4579了G1268G5875G3132的尺寸。G5415然，在己获得明G7186进展的纳米G1268G5875领域中尚G4396在很多问G20076，从G6947G5875材G7021到G2058作G6228G7427都很不成G10099，其G5627能也有不尽人意的地G70535。G8680G6947G1268G5875G3132在家用电G3132中也有G11468G5415广泛的G5224用。G2572油烟机G12573产品G990常用MQ3G3423G2334导体G8680G6947G1268G5875G3132，G4439G18331用旁热式G13479构，陶瓷管内G16025有G20652G19471抗加热丝，管外涂有梳G10378金G4658电G7509，金G4658电G7509G1055外涂有SNO2材G7021，使SNO2G9915G13479体位G1122两电G7509G1055间6。G8680G6947G1268G5875G3132G5049作G7114，加热G3132通电加热，若无被G7828G8680体侵入G7114，G8680G6947G1815件的G19471值G3534本不G2476G5415G8680G6947G1815件表G19766产生G2572G19480作用，其G19471值将随G8680体G8999G5242的G2476G2282G2476G2282。G5415被G7828G8680体G8999G5242增G3835到G980定值G7114，G8680G6947G1815件的G19471值将随G1055下降到某G980值，使电G2399比G17751G3132的G10378态发生G2476G2282，G17767出G6523G2058G1461G2507经电G8981G6930G3835后，G6523G2058继电G3132或G2464向G7242闸管G6521通电G2172机电源使G2572排油烟机G5049作7。13设计酒精浓度探测仪的意义本G16786G16757G3534G1122AT89S51G2345G10267机G16786G16757的G18214G12946G8680体G8999G5242G6518G8991G1214，G2499用来G7828G8991G18214G12946G8680体G8999G5242，G7380主G16213的用途是G7828G8991司机的G18214G12946含量。G18214后驾车发生事故的机G10587G20652G1781027。随着摄入G18214G12946量的增加，选G6333G2465G5224错G16835G10587G7186著增加，G5415血液中G18214G12946含量由05增G142791，发生车祸的G2499能G5627便增加5倍，如果增G1427915，G2499能G5627再增加6倍。机G2172车驾驶人G2604“G18214后驾车G257G2462“G18269G18214驾车G257G7509易发生道G17347交通事故,严重G2373害了道G17347交通G4445全和人民生命G17142产G4445全。人G20290G18214后,G18214G12946通G17819G9052G2282G13007G13491被人体G2572G6922,经G17819血液G5502环,G13434有90的G18214G12946通G17819G13966部G2640G8680排出,因G8504G8991量G2640G8680中的G18214G12946含量,就G2499判断其G18269G18214G12255G5242。G5332车司机只G16213将嘴G4557着G1268G5875头使劲吹G8680，G1214G3132就能发G990G7186G12046出G18214G12946G8999G5242的G20652低，从而判断G16825司机是否G18214后驾车，避免事故的发生。G5415然，G7380好的办法是在车内G4445G16025这种G8991G16809G1214，司机G980进入车内G7828G8991G1214就G7828G8991司机的G18214G12946含量，如果超出允许值，G13007G13491G6523G2058引擎无法启G2172，这样就G2499从根本G990解决G18214后驾车问G20076。G18214G12946G8680体G8999G5242G6518G8991G1214在生产生活中也有重G16213的G5224用，比如，在G980些环境G16213G8726严格的生产车间，用这种G18214G12946G8999G5242G6518G8991G1214，G2499随G7114G7828G8991车间内的G18214G12946G8680体G8999G5242，G5415G18214G12946G8680体G8999G5242G20652G1122允许限定值G7114，发出G16698G6265，G6564G18278人们G2462G7114通风G6454G8680，做到G4445全生产。14本文主要研究工作本文以AT89S51G2345G10267机G1038G7692G5527，G16786G16757了用G1122G8991量G18214G12946G8999G5242的G6518G8991G1214，主G16213研究G5049作包括以下3个G7053G19766。G7081G709G11840件电G17347G7053G19766，G4557G8680体G1268G5875G3132MQ3G6365G7828G8991电G17347，G6521G990G980定G19471值的G17139G17745电G19471，G7828G8991G4439的G6228G7427G2454数，G11842定MQ3所G6521G17139G17745电G19471的G3835G4579，完成G1461G2507G18331样电G17347的G16786G16757G727G18331样到的A17A18A19A20A21A22A23A243G8181G6323电G2399电G1461G2507通G17819A/DG17728G6454，得到G2499G1391G2345G10267机G3800理的数G4395G1461G2507，再由G2345G10267机作G11468G5224的数据G3800理G727发G1821G1120G7509管G6265G16698G7186G12046和3个G2345位8G8585G1861G19464数G11733管G8999G5242值G7186G12046。G7082G709G17731件G7053G19766，标G1946的G11842定是G16825部分G16213做的主G16213G5049作。因G1038G2419G3999的G18331样值是G980个间G6521的G17139G17745分G2399值，G19668G16213将G4439G17728G2282G1038被G8991G18214G12946G8999G5242值。通G17819多个样品的G8991量G11842定多个G8999G5242区间的G17728G6454标G1946，并将G8611个区间的G17728G6454关G13007近G1296G13459G5627G2282G3800理，然后通G17819G17731件编G12255的G7053法来G4466G10628。G7083G709G1038了尽量G1955G4581G16786G16757的G8680体G1268G5875G3132的G8991量G16835G5058，在G8991量G18214G12946G9354液样品G7114G16213G13783G15397并解决3个主G16213问G20076。G980是外界环境G8981G2172空G8680G4557G1268G5875G3132的G5445G2721和G4557G8680体样品的G12244G18334，G1120是样品的G12295定G5627G4557G8991量G5114来的G16835G5058，G989是水蒸G8680G4557G8991量的G5445G2721。G19036G4557这3个主G16213问G20076G6564出以下解决G7053G7708和G20576证G7053法。G8991量样品G7114，将G6518头尽量G6930入G3621G7021G10954内，G2499以在G980定G12255G5242G990G9052除G8981G2172空G8680的G5445G2721，同G7114G5224选G6333空G8680G8981G2172G17751G4579的G4472内环境来G8991量。水蒸G8680G4557MQ3的G5445G2721很G4579，这G980G9869G2499以通G17819G4557只G16025有纯G1940水的G3621G7021G10954的多G8437G8991量来G20576证。用G11468同容量的G3621G7021G10954G18209G2058好不同G8999G5242的G18214G12946G9354液后，将G4439G4506G4565并G6930G13634G980G8585G7114间，G5465其G12295定后再G8991量。再通G17819G2465复多G8437G8991量多组数据，G8726其G5191G3355值的G7053法来G13565G4579G8991量G16835G5058。A17A18A19A20A21A22A23A2442硬件电路设计与实现21单片机开发流程G7081G709G2499行G5627G16855研。G2499行G5627G16855研的目的，是分G7524完成这个G20045目的G2499能G5627。进行这G7053G19766的G5049作，G2499G2454G13783国内外有关G17176G7021，G11487是否有人进行G17819类G1296的G5049作。如果有，G2029G2499分G7524他人是如何进行这G7053G19766G5049作的，有G1172G1052有G9869和G13582G9869，