[信息与通信]基于EDA的声控电子锁的设计.doc

声控电子锁的设计 [摘 要] 随着电子技术的发展，具有防盗报警等功能的电子锁代替安全性差的机械锁已是必然趋势。声控电子锁是以敲门声的节奏开锁的，代码检测电路是系统的主要部分。通过话筒采集敲击声将声音信号转换为电信号，然后经过放大整形电路将每次的敲击声信号变成对应的一个电平信号，控制部分采用EDA技术，利用MAX+plus II 10.2 II工作平台和VHDL硬件描述语言设计完成。以八位序列作为密码，密码可自由设置。有敲击声为高电平，用绿灯指示，反之则为低电平，用红灯指示。输入序列通过代码检测电路与预先设置好的密码进行比较，如果正确则黄灯亮输出开锁信号，当输入错误三次时报警。敲击节奏太快开不了锁，太慢也开不了锁。如果不掌握敲击规律将无法打开门锁。 [关 键 词] 声控电子锁；MAX+plus II ；VHDL [中图分类号] TN702 [文献标志码] A Sonic electronic lock design [Abstract] With the development of electronic technology, have anti-burglar alarm function of electronic lock instead of poor safety of mechanical lock already is an inevitable trend. Sonic electronic lock is the rhythm of the knock on the door lock, code detection circuit is the main part of the system. Through the microphone acquisition knock voice signals are converted to electrical signals, which then amplified plastic circuit will each time the chiming of the signal into the corresponding level signal, the control part adopts EDA technology, using MAX + plus II 10.2 II work platform and VHDL design completed. With eight series as password, the password can be installed freely. Have chiming high level, with green instructions, conversely for low level, with red light instructions. Input sequences through code detection circuit with predefined good password comparison, if correct is yellow light output signal input errors lock, when three times when alarm. Knock too fast can not open the lock, too slow and can not open the lock. If do not have the percussion rule will not unlock the door. [Key words] Sonic shut electronic locks; MAX + plus II,;VHDL 不要删除行尾的分节符，此行不会被打印目 录 摘要 I Abstract II 目 录 1 1绪论 2 1.1 课题背景 2 1.1.1 EDA技术的发展 2 1.1.1.1 EDA技术介绍 2 1.1.1.2 EDA设计工具 3 1.2 选题依据 4 1.2.1 选题依据 4 1.2.2 设计功能 5 2系统方案选择 6 2.1设计方案选择 6 2.1.1方案一 6 2.1.2方案二 8 2.1.3方案三 9 2.2方案论证 9 2.2.1三种方案的比较 9 2.2.2最终方案选择 10 3单元模块设计 11 3.1声音采集部分的设计 11 3.2控制部分的设计 14 3.2.1时钟分频模块 14 3.2.2电平信号锁存模块 15 3.2.3序列密码检测控制模块 16 3.2.4开锁次数计数器及报警模块 19 3.2.5总体电路模块 20 4总体电路调试 22 结 论 23 致 谢 2