南邮电子密码锁设计实验报告

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1、电子密码锁设计实验报告摘要：密码锁又称电子锁，它的主要功能是：1）用数字方式输入开锁密码，输入密码正确时开锁；2）如果密码有误或者输入时间过长，则发出报警信号。目录：第一章、系统结构与技术指标1.1系统功能结构·························································31.2性能和电气指标·······················································31.3设计条件···················

2、··········································4第二章、整体方案设计2.1密码设定·····························································42.2密码判断·····························································5222.3密码录入和判断结果显示···············································5

3、2.4系统工作原理框面·····················································5第一章、单元电路设计3.1按键录入和编码电路···················································63.2地址记录和存储电路···················································83.3密码锁存和比较电路········································

4、···········83.4判决与结果显示电路···················································103.5时钟·································································103.6整机电路图···························································123.7元件清单······························

5、·······························1322第一章、电路测试4.1单元电路测试··························································174.2整体指标测试··························································184.3测试结果······························································18第二章

6、、总结5.1设计任务完成情况······················································195.2问题及改进····························································195.3心得体会······························································2022第一章、系统结构与技术指标1.1系统功能结构密码锁：用数字键方式输入开锁密码，输入密

7、码时开锁；如果输入密码有误或者输入时间过长，则发出警报。密码锁的系统结构框图如下图1-1所示，其中数字键盘用于输入密码，密码锁用于判断密码的正误，也可用于修改密码。开锁绿亮表示输入密码正确并开锁，报警红亮表示密码有误或者输入时间超时。开锁绿密码锁22输入密码数字键盘报警红图1-1密码锁系统结构框图1.2性能和电气指标1.2.1开锁密码为8位十进制数字，由按键输入，按“确认”键后，输入的数字有效。1.2.2输入的8位数字与预设的密码相同时开锁，用绿灯亮，红灯灭表示。数据有误时或输入的密码时间过长即报警，红灯

8、亮。1.2.3密码可以通过键盘设定或修改。1.2.4输入的数字间隔时间小于或等于15s。超过时限则报警，同时电子锁复位。1.2.5具有手动、自动复位功能。1.2.6在不采用RAM和EPROM的情况下完成设计（可增加标准数字器件）。1.2.7不采用EPROM时，设定修改密码的方法不限。1.3设计条件1.3.1电源条件：稳压电源提供+5V电压。1.3.2可供选择的元器件如表1-1所示型号名称及功能数量74374八D触发器1片747