密码锁设计毕业论文

金华职业技术学院JINHUAPOLYTECHNIC毕业教学环节成果（2015届）题目学院专业班级学号姓名指导教师2015年1月1日金华职业技术学院毕业教学成果目录摘要··········································································································1英文摘要····································································································1引言··········································································································21设计方案选择·························································································31.1设计概述··························································································31.2设计要求及功能················································································31.3设计方案论证和比较··········································································32系统硬件框图及单元电路的模块设计···························································42.1主控制模块设计·················································································42.1.1STC89C52单片机的介绍····································································42.1.2晶振电路介绍·················································································52.1.3复位电路介绍·················································································52.2显示模块设计····················································································62.3键盘输入模块设计··············································································62.4继电器驱动模块设计···········································································72.5声光报警提示模块设计········································································82.6电源模块设计····················································································83系统软件设计·························································································93.1程序结构分析····················································································93.2系统程序流程图·················································································93.3键盘功能程序流程图···········································································93.4确认密码程序流程图·········································································104系统联机调试与分析··············································································11结论与谢辞·······························································································12参考文献··································································································13附件1．元器件清单····················································································14附件2．电路仿真图····················································································15附件3．原理图及PCB图·············································································16附件4．实物图··························································································17附件5．程序·····························································································181电子密码锁的设计信息工程学院应用电子技术专业曾天昊摘要:本文介绍一种基于STC89C52单片机的电子密码锁，采用矩阵式键盘作为输入设备，通过LCD显示数据。用户使用键盘输入密码，如果输入密码正确，则由单片机控制继电器驱动电子锁弹开，从而实现电子密码锁的功能。可以自行修改密码，并有恢复用户初始密码的功能。开锁后LCD将显示时间，可作电子钟使用。关键词:单片机密码锁时间显示矩阵键盘TheDesignoftheElectronicCombinationLock(MajorofAppliedElectronicTechnology,InformationandEngineeringcollege,JinHuaCollegeofVocationAndTechnology,Zengtianhao)Abstract:ThispaperintroducesakindofCombinationlockbasedonSTC89C51chipmicrocomputer,thematrixtypekeyboardasaninputdevice,displaydatabyLCD.Userstousethekeyboardtoenterapassword,iftheinputpasswordiscorrect,iscontrolledbyasinglechipmicrocomputerrelaydriveelectroniclockopen,soastorealizetheelectronicpasswordlockfunction.Youcanmodifythepassword,andrestoretheinitialpassword.WhenthelocktoopentheLCDwilldisplaythetime,canbeusedaselectronicclock.Keyword:MCUCombinationlockDisplaytimeMatrixkeyboard2引言随着社会物质财富的日益增长，安全防盗已成为社会问题。在日常的生活和工作中,住宅与部门的安全防范、单位的文件档案、财务报表以及一些个人资料的保存多以加锁的办法来解决。人们常需携带多把钥匙,使用极不方便,如果钥匙丢失，安全性即大打折扣。且传统的机械锁由于其构造的简单，被撬的事件屡见不鲜，无法满足人们的需要。如何实现防盗和安全这一问题也变的尤其的突出，而锁自古以来就是把门户的将军，人们对其要求比较高，不仅要能够安全的防盗，而且还要使用方便，这是制锁者长期以来研制的主题。而电子锁由于用密码代替钥匙其保密性高，使用灵活性好，安全系数高，受到了广大用户的亲呢。当今社会随着计算机的迅猛发展，数字电子技术已经进入人们生活的各个领域，在国内外，电子产品的更新可谓如雨后的春笋层出不群，更多的电子产品也越来越多的应用于安全防范领域。具有防盗报警功能的电子密码锁逐渐代替传统的机械式密码锁，克服了机械式密码锁密码量少、安全性能差的缺点，使密码锁有了巨大的变革，无论在技术上还是在性能上都大大提高一步。现代的电子技术与机械技术相结合，产生了一大批的智能锁。随着大规模集成电路技术的发展，特别是单片机的问世，出现了带微处理器的智能密码锁，使密码锁具有很高的安全性、可靠性，应用日益广泛。目前这类密码锁种类繁多，且各具特色，像指纹锁、IC卡辨识、遥控锁、声控锁等。我相信这类产品会在今后的各个领域逐渐普及起来，为人们的生活带来更多的安全和便利。现在应用较广的电子密码锁是以芯片为核心，通过编程来实现的。其性能和安全性已大大超过了机械锁。本文介绍的电子密码锁由单片机系统、矩阵键盘、LCD显示等系统组成,能完成密码输入开锁的功能。设计成本低廉，功能实用,可广泛用于车辆、大门、保险柜等各种需上锁的场所。31系统方案设计1.1设计概述选用STC89C52单片机作为主控制器件，通过4*4矩阵式键盘作为输入设备输入密码，如果正确则由单片机控制继电器驱动电子锁自动弹开。开锁后LCD将显示年月日、时分秒、星期，作电子钟使用。用户还可自行修改密码。1.2设计要求及功能1）使用LCD显示器显示。显示格式为16x2点阵式，第一行显示“Inputpassword:”即输入密码，第二行则会显示输入的密码，为增加安全性，密码将成*型显示。2）4x4矩阵键盘包括0—9数字键和A、B、C、D、E、F六个功能键。A为输入密码键，B为修改密码键，C为位选键，D为加一键,E为减一键，F为回复初始密码键。初始密码为“000000”。3）输入密码正确继电器开锁，LED亮起，LCD将显示“Passwordok!”的字样，5秒后进入时钟显示界面，显示年月日、时分秒、星期，可使用C、D、E三个键改变时间。4）输入密码错误LCD将显示“Passworderror!”的字样，连续错误三次会显示“Lockscreen!!!”的字样，并自锁30秒。5）进入时钟显示界面，按B键LCD将显示“SetPassword:”的字样，输入新密码后再按B键确认，完成密码