一种智能电子码锁的设计.doc

毕业设计说明书 一种智能电子密码锁的设计 学 院： 电气与电子工程学院 专 业： 电子信息工程 学生姓名： 学 号： 指导教师： 2012 年 6 月 摘 要 随着人们生活水平的提高和安全意识的加强，锁具系统的安全性变得至关重要，传统的机械锁由于其构造的简单，安全性能低，无法满足人们的需要，电子锁是通过输入密码来控制电路或是芯片工作的，从而控制机械开关的闭合，实现开锁、闭锁任务的电子产品，其安全系数高，使用灵活性好，必威体育官网网址性高，受到了广大用户的青睐。 本次设计使用AT89C51实现一基于单片机的电子密码锁。该电子密码锁系统由单片机、LED显示器、矩阵键盘和报警系统组成。其功能是由键盘输入4位密码，通过单片机进行密码的比较，实现系统开锁的功能，此外系统还可以完成超次锁定、修改密码等基本的密码锁功能，而该系统的电源部分将由市电供电电路和备用电源电路两部分组成，因此，本次设计的电子密码锁只适用于保险柜、门等固定设备。本文详细的介绍了系统各个硬件的性能和作用，以及软件设计思路和主要软件模块的流程图。 该密码锁安全、有效、可靠，有很强的实用价值，另外由于设计简单，实验材料价钱低，可用于实际生活中。 关键词：单片机；矩阵键盘；LED显示；报警 ； Abstract With the improvement of peoples living standard and safety consciousness strengthen, lock system security becomes more and more important, the traditional mechanical lock because of its simple structure, low safety property, can not meet the needs of the people, the electronic lock is by entering the password to the control circuit or chip work, mechanical switches to control the closure, realize unlocking, closed the task of electronic products, the safety factor is high, the use of flexibility good, high confidentiality, by the majority of users of all ages. The design uses AT89C51 microcontroller-based electronic combination lock.The electronic lock system is composed by the microcontroller, LED display, matrix keyboard, and alarm systems. Its function is entered from the keyboard 4 password, the password comparison, through the SCM system lock function, in addition to the system can also be completed Subharmonic and Ultra lock, modify passwords and other password lock function, and the power part of the system mains power supply circuit and standby power of two parts, therefore, the design of the electronic code lock is only applicable to safes, doors and other fixtures. This paper describes the performance and role of the system hardware and software design ideas and the flow chart of the major software modules. The