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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
2、:Intelligenceansweringraceristheproductthatisessentialequipmentinvariouscompetitions,whichisathomeandabroadaremoreuseful,moreover,itsdevelopmentisalsofast.Fromthebeginningofhavingonlyresponderandlockfunctionofacircuit,andnowwiththecountdown,timing,automatically(ormanuall
3、y)reset,alarm(audiblealertsignal,insomewaysembodieswithmusic),theLEDdisplay,luminescentkeysandothertechnicalfunctionsmerger,whichillustratesitsvariousfunctionandrapiddevelopment.Inthedesign,theelectriccircuitanddesigningthoughtofanintelligenceansweringracerbasedonthecomm
4、on-usedseriesof74ICwith8-wireisintroduced,anditsfunctionisalsodescribed.Theansweringrace’sfunctionincludestiming,counting,andalarming,besidesthebasicfunctionofanansweringracer.Thehostsetstheprovidedtimefortheansweringracethroughthetime-settingswitch,afterthisthesystemwil
5、lcountdownthetimeautomatically.Ifanybodyanswerthequestionontime,thecountingoftimewillstop;Ifnobodyanswerthequestionontime,thealarmwillgiveoutsomesound,helpingthehostknowtheraceinthisturnisofnouse,sothefunctionofalarmingisachieved.Thedesignprogramwhichthedesignadoptsissim
6、pleanddirect-viewing,onlyusingafewTTLdoorstoachievethattheanchorcancontrolthewholeelectriccircuit.Thealarmelectriccircuitcanbecontrolledbyintegratedsinglesteadystate.Wecanchoosetheexistingchiptoreplacethechipwecreatebyourselves,thatnotonlyrealizestheanticipatedfunction,t
7、hatalsoreducesthewiring,causestheprobabilitywhichmistakeisengendereddropgreatly.Thecompositionofelectriccircuitselects74serieschips,economicalandpractical,stableisreliable,itissuitableforthelarge-scaleproduction.Keywords:Intelligenceansweringracer；8-wire；Design,；Timing;C
8、ontrolIV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
