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1、中北大学信息商务学院2012届毕业设计说明书(仅供大家参考)智力抢答器设计摘要:随着科学技术的不断发展,促使人们学科学、学技术、学知识的手段多种多样。抢答器作为一种工具,已广泛应用于各种智力和知识竞赛场合。但抢答器的使用频率较低,且有的要么制作复杂,要么可靠性低,减少兴致。作为一个单位若专购一台抢答器虽然在经济上可以承受,但每年使用的次数极少,往往因长期存放使抢答器损坏,再购置的麻烦和及时性就会影响活动的展开,因此设计了本抢答器。本设计是以八路抢答为基本理念。考虑到依需设定限时回答的功能,利用AT89C51单片机及外围接口实现的抢答系统,利用单
2、片机的定时器/计数器定时和记数的原理,将软、硬件有机的结合起来,使得系统能够正确地进行计时,同时使LED数码管能够正确的显示时间。用开关做键盘输出,扬声器发生提示。同时系统能够实现:在抢答中,只有开始后抢答才有效,如果在开始抢答前抢答为无效;抢答限定时间和回答问题的时间可在1~99s设定;可以显示是哪位选手有效抢答,正确按键后有音乐提示;抢答时间和回答问题时间倒计时显示,满时后系统计时自动复位及主控强制复位;按键锁定,在有效状态下,按键无效非法.关键词:AT98C51,抢答器,倒计时,报警中北大学信息商务学院2009届毕业设计说明书Design
3、onIntellectualAnswerDevicesAbstract:Withthecontinuousdevelopmentofscienceandtechnology,promotelearningscience,scienceandtechnology,knowledgeofthevarietyofmeans.WithatoolforAnswerdevices,thishasbeenwidelyusedinallkindsofintelligenceandknowledgecontestsoccasions.ButAnswerdevic
4、esareusedforlowerfrequency,andsomeproductioncomplexorlowreliability,andreducedinterest.Asaunit,ifthepurchaseisaAnswerdevices.Althoughtheeconomycanbear,eachyearthenumberisextremelysmall,becauseofthelong-termstorageAnswerdevicesfordamagetothepurchaseofthetroubleandtimelinessof
5、activities.Thedevelopmentwillbeaffected,sothisAnswerdevicesisdesigned.ThisdesigniseightroadAnswerdevicesasthebasicconcept.Bytakingintoaccounttheneedforsettingtimeandlimitingtoanswerthefunction,whichusesAT89C51microcontrollerandexternalinterfaceofanswersystem,andusesSCMtimer/
6、countertimingandthecountprinciple,thesoftwareandhardwareorganicallycombined,whichcouldallowtherighttoshowtime,andtheLEDdigitaltubedisplaytothecorrecttime.Switchingwiththekeyboardoutput,speakersintips.Atthesametime,systemcanberealized:Intheansweronlyaftertheanswertobevalid,it
7、isinvalidifatthebeginningofanswerbeforetheanswer;Theanswertimeandanswerthequestionstimecanbesetinthe1-99s;playerswhocanshowthatitiseffective,rightafterthemusickeys;answertimeandanswerthequestionstimewillshowcountdown,overtime,thesystemautomaticallyrestcontrolandmandatoryredu
8、ction;keyslockedinaneffectivestate,thekeyisinvalidillegal.Keywords:AT89C51,