双钮电子锁的设计.doc

双钮电子锁的设计.doc电子与信息工程学院
本科毕业论文
论文题目双钮电子锁的设计
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专业电气工程及其自动化
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指导教师
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摘要
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。若使用传统的机械式钥匙***,人们常需携带多把钥匙, 使用极不方便, 且钥匙丢失后安全性即大打折扣。具有防盗报警等功能的电子密码锁代替密码量少、安全性差的机械式密码锁已是必然趋势。随着科学技术的不断发展,人们对日常生活中的安全保险器件的要求越来越高。为满足人们对锁的使用要求,增加其安全性,用密码代替钥匙的密码锁应运而生。密码锁具有安全性高、成本低、功耗低、易操作、记住密码即可***等优点。
目前使用的电子密码锁大部分是基于单片机技术,以单片机为主要器件,其编码器与解码器的生成为软件方式。
基于STC89C52设计的双钮电子锁是以STC89C52为核心控制电路,配以输入控制电路、复位电路、晶振电路、报警电路、门铃电路、***电路等外围电路,实现对密码的输入、识别、修改、存储及输入密码错误时报警等功能。该系统中,STC89C52是输入和输出的联系部件,它通过读取从键盘输入的数据并对存储在单片机中的密码进行识别比较,判断密码是否输入正确,并作出相应的决定,指示报警器是否发出嗡鸣声。这种密码锁以其安全性高、成本低、易操作等优点受到越来越多人的欢迎。
关键词:STC89C52; 电子锁;单片机;安全
ABSTRACT
In the day-to-day living and working in the residential sector and the safety precautions, units of paper files, financial statements, and some personal information to the preservation of more than locking the solution to the problem. If the use of traditional mechanical key to unlock, people often need to carry more keys, a very inconvenient to use, and after the loss of key security that is greatly reduced. With anti-theft alarm function instead of the password is less electronic lock, security, poor mechanical lock is an inevitable trend。 With the continuous development of science and technology, in the daily lives of people on insurance safety devices increasingly demanding. To meet the requirements of the use of locks to increase their security, with a password instead of the password key lock came into being. Password lock is safe, low cost, low power consumption, easy to operate, Remember the password to unlock it ,and other advantages.

At present the use of electronic locks are mostly based on microprocessor, main devices MCU, the encoder and decoder built into software.
The core control circuit of two buttons electric lock designed based on STC89C52 is STC89C52,and together with the input control circuit, reset circuit, crystal circuit, alarm circuit,doorbell circuit ,open lock circuit and other peripheral circuits circ