红外遥控电子密码锁的设计摘要在我们的日常生活以及工作之中，密码锁是一种随处可见、不可或缺的必需品，也是我们个人隐私和财物的保护伞。小到个人日记本，大到国家机密，它无处不在，当然，形式也是各有不同。平时所见的机械式锁必然离不开钥匙，而且一旦钥匙丢失或者遗忘在办公室等地方，会给人们带来不必要的麻烦，显然，古老的保护装置已经无法满足新时代的要求。以前的电子锁密码结构简单，存在安全性问题。而今天的密码锁具有较高的密保性，并且生产成本低，容易操作。开锁人不需要携带钥匙，更不必担心钥匙丢失，只需记住密码就能打开。本次设计以STC89C52单片机为基础，增添了许多功能，比如矩阵型键盘、提示音和显示屏。可以设置和修改用户密码（默认密码为六位），也包括密码错误报警指令、多次输入错误锁定、多次输入错误报警等功能。当密码输入正确时，会自动显示“OPEN！”，密码错误则为“ERROR！”。当密码连着输错三次，系统就会自动锁死。关键词STC89C51LCD1602电子密码锁4×4矩阵键盘IDesignofinfraredremotecontrolelectroniccodelockAbstractInourdailylifeandwork,thepasswordlockisakindofeverywhere,indispensablenecessities,itprotectsourprivacyandpersonalpropertysafety.Smalltoindividualdiaries,largetostatesecrets,itiseverywhere,certainly,themodusismanyforms.Usuallyseethemechanicallockmustbeinseparablefromthekey,andoncethekeyislostorforgottenintheofficeandotherplaces,willgivepeopleunnecessarytrouble,obviously,theoldprotectiondevicehasbeenunabletomeettherequirementsofthenewera.Atpresent,weusetheelectroniccodelockinsteadoftheoriginalmechanicallock,tosolvethepreviouspasswordistoosimple,lackofsecurityshortcomings.Thenewelectroniccodelockisnotonlylowprocessingcost,simpleoperation,andsafetyperformanceisalsothetraditionalmechanicallockcannotbecompared.Unlockingpeopledonotneedtocarrythekey,donothavetoworryaboutthekeyislost,justrememberthepasswordwillbeabletoopen.ThisdesignisbasedonSTC89C51single-chipsystemdesign,andsubjojina4×4keyboard,showandalarmsystem.Youcansetandmodifytheuserpassword(thedefaultpasswordissix),includingpassworderroralarminstructions,multipleinputerrorlock,multipleinputerroralarmandotherfunctions.Whenthepasswordisenteredcorrectly,itwillautomaticallydisplay"OPEN!"Andthepassworderroris"error!".Iftheerrorthreetimes,itwilllock.Keywords：STC89C51LCD1602Electronicpasswordlock4×4keyboard目II录Abstract....................................................................................................................................II图清单....................................................................................................................................VII表清单...................................................................................................................................VIII1绪论......................................................................................................................................11.1课题研究背景及意义....................................................................................................11.2研究现状.......................................................................................................................11.3电子密码锁的发展趋势................................................................................................21.4本章小结.......................................................................................................................22总体设计方案..............................................................................
