声控密码电子锁电路设计[1]VIP免费

河南科技学院新科学院2013届本科毕业论文（设计）倒萨论声控密码电锁电路设计学生姓名：马秉旭所在系别：电气工程系所学专业：电气工程及其自动化导师姓名：洪源完成时间：____________________声控密码电子锁电路设计摘要采用逻辑门电路设计电子密码锁，阐述了其工作原理，给出了具体的电路原理图。该密码锁具有密码预置功能，保密性强，误码报警，并且报警时间可以设定，同时用数码管显示出报警时间。密码正确时驱动继电器控制开锁指示灯，误码时报警信号由蜂鸣器发出，声音为间歇式鸣笛。采用自行设计的5V稳压电源供电，具有耗电省等特点。使用时用户必须按下确认按钮后方可知用户输入的密码是否与预置密码一致，当密码正确时密码锁可以被打开，点亮绿色二极管亮代表密码正确，锁可以打开。密码不正确时按下确认按钮，红色二极管被点亮，同时蜂鸣器鸣笛十秒，数码管显示十秒倒计时；倒计时结束时，数码管显示00，对其产生的编码信号经门电路处理后转化为低电平信号，传给秒脉冲电路控制端，使其停止工作，从而脉冲驱动的蜂鸣器也停止报警。关键词：电子密码锁，数字电路，预置密码，误码报警VoiceelectroniccipherlockcircuitdesignAbstractThelogicgatecircuitdesignelectronictricklock,expoundsitsworkingprinciple,giveaspecificcircuitprinciplediagram.Thiscombinationlockhaspasswordpresetfunctions,secrecyisstrong,erroralarm,andalarmtimecanset,andwithadigitalalarmtimetubestodisplay.Whenthecorrectpasswordisdrivingrelaycontrolthelockindicatorlight,erroralarmsignalwhenavoiceforthebuzzer,intermittentwhistling.Self-designed5Vvoltagepowersupply,hasthepowersaving,etc.Whenusingtheusermustbeontheconfirmbuttonthatbehindthepasswordofuserinputandpresetpassword,whetherconsistentwhenthecorrectpasswordcombinationlockcanbeopenwhen,lightgreenlightrepresentsthecorrectpassword,diodecanopenthelock.Passwordisnotcorrectpressconfirmbutton,reddiodetolight,andtenseconds,sirensbuzzerdigitalpipedisplaytensecondstocountdown;Theendofthecountdown,digitalpipedisplay,toproduceasignalgateafterprocessingthecodeintolowlevelsignalstothesecondpulse,thecontrolcircuit,makeitsstopworkandpulseofdriverbuzzeralsostoppedthepolice.Keywords:electronictricklock,Digitalcircuit,Presetpassword,Erroralarm目录1.前言..............................................................................................................................................11.1声控电子锁的应用与发展...............................................................................................11.2设计任务............................................................................................................................12.1方案比较............................................................................................................................12.2方案论证............................................................................................................................42.3方案选择............................................................................................................................53．单元模块电路设计.....................................................................................................................53.1序列脉冲检测电路设计....................................................................................................53.2取样及放大整形电路设计.............................................................................................113.2.1时基电路NE555..................................................................................................123.3延时及脉冲...