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1、教学单位电子电气工程系学生学号编号本科毕业设计题 目 学生姓名 专业名称 电子信息工程 指导教师 2011年月日目录一、设计正文中文摘要………………………………………………………………Ⅱ英文摘要………………………………………………………………Ⅲ正文目录………………………………………………………………Ⅳ二、附录1.设计任务书2.设计中期检查报告3.指导教师指导记录表4.设计结题报告5.成绩评定及答辩评议6.设计答辩过程记录IVThedesignofintelligenceansweringracersystemAbstract:Intelligenceansweringracer
2、istheproductthatisessentialequipmentinvariouscompetitions,whichisathomeandabroadaremoreuseful,moreover,itsdevelopmentisalsofast.Fromthebeginningofhavingonlyresponderandlockfunctionofacircuit,andnowwiththecountdown,timing,automatically(ormanually)reset,alarm(audiblealertsignal,insomewaysembodieswit
3、hmusic),theLEDdisplay,luminescentkeysandothertechnicalfunctionsmerger,whichillustratesitsvariousfunctionandrapiddevelopment.Inthedesign,theelectriccircuitanddesigningthoughtofanintelligenceansweringracerbasedonthecommon-usedseriesof74ICwith8-wireisintroduced,anditsfunctionisalsodescribed.Theanswer
4、ingrace’sfunctionincludestiming,counting,andalarming,besidesthebasicfunctionofanansweringracer.Thehostsetstheprovidedtimefortheansweringracethroughthetime-settingswitch,afterthisthesystemwillcountdownthetimeautomatically.Ifanybodyanswerthequestionontime,thecountingoftimewillstop;Ifnobodyanswertheq
5、uestionontime,thealarmwillgiveoutsomesound,helpingthehostknowtheraceinthisturnisofnouse,sothefunctionofalarmingisachieved.Thedesignprogramwhichthedesignadoptsissimpleanddirect-viewing,onlyusingafewTTLdoorstoachievethattheanchorcancontrolthewholeelectriccircuit.Thealarmelectriccircuitcanbecontrolle
6、dbyintegratedsinglesteadystate.Wecanchoosetheexistingchiptoreplacethechipwecreatebyourselves,thatnotonlyrealizestheanticipatedfunction,thatalsoreducesthewiring,causestheprobabilitywhichmistakeisengendereddropgreatly.Thecompositionofelectriccircuitselects74serieschips,economicalandpractical,stablei
7、sreliable,itissuitableforthelarge-scaleproduction.Keywords:Intelligenceansweringracer；8-wire；Design,；Timing;ControlIV目录1绪论12设计任务及方案22.1设计要求22.1.1设计要求122.1.2设计要求222.2设计方案的选择22.3设计思想与设计原理43单元电路的设计53.1抢答部分电路设计53.1.1
