张平(六位十进制密码锁)-(自动保存的)
电子初级技能培训2 论文
论文题目：电子密码锁
指导老师：盛磊钟伟
学生姓名：张平
学号: 201412021715
专业：电子信息工程技术
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2015年 12月01日
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摘要
锁，是一种保护隐私和秘密的重要工具。如今大到国家机关，小到居民住宅，锁无处不在。密码锁是锁的一种，开启时用的是一系列的数字或符号组成的密码。而电子密码锁是一种通过密码输入来控制电路或是芯片工作，从而控制机械开关的闭合，完成开锁、闭锁任务的电子产品。它的种类很多，有简易的电路产品，也有基于芯片的性价比较高的产品。现在应用较广的电子密码锁是以芯片为核心，通过编程来实现锁的功能的，而我用数字电路来实现电子密码锁的功能。
在本次技能培训中，我组设计了一个六位十进制密码锁。主要分为如下几个部分：
1.用户密码输入单元：位于密码锁外部，为用户提供拨码开关式输入
密码的方式。
2.密码显示单元：用拨码开关对数码管输入一组固定的值来代替密码
防止密码被盗窃。
3.真实密码存储单元：位于密码锁内部，用拨码开关存储真实密码，
且该密码可以被用户修改。
4.密码正误判定单元：位于密码锁内部，用数值比较器来判断用户密
码是否输入正确。
5.连续计次报警单元：位于密码锁内部，计时器配合一个蜂鸣器和红
绿灯，当输入密码三次结束后还没有正确的密码输入，则蜂鸣器报
警三秒且红灯亮，输入正确则绿灯亮且开锁。
关键词：计数器，计时器，锁存器，数值比较器。
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Abstract
it is a kind of important means of protecting privacy and secret. Now the big to the state organs, small to residential, lock is everywhere. A combination lock is a lock, open use the password is composed of a series of Numbers or symbols. And electronic combination lock is a password or to control circuit, so as to control mechanical switches closed, lock, lock task of electronic products. It's a lot of more phyletic, has simple circuit products, also has a high cost performance products based on the chip. Widely used on electronic combination lock is now chip as the core, through the programming to realize the function of the lock, and I use digital circuits to realize the function of electronic combination lock.
In this training, my group has designed a six decimal coded lock. Mainly divided into the following several parts:
1. User password input unit: located in the combination lock external, to provide users with dial the code switch type a password.
2. Password display unit: dial the code switch to digital tube a fixed set of input values instead of a password to prevent password theft.
3. The real password storage unit: in the combination lock, with dial the code switch store real password, the password can be modified by the user.
4. The password is right and wrong decision unit: in the combination lock, use numerical comparator to determine whether the user password input is correct.
5. Continuous would alarm unit: the combination lock, internal timer with a buzzer and traffic lights, when the end of the input password
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three times is not the correct password input, the buzzer alarm three seconds and turns red, input the correct green light and then open the lock.
Keywords: counters, timers, latch, numerical comparator.
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