合成氨工艺基于单片机的门禁系统设计
摘 要
针对日常生活中小区住宅的安全防范，一般的门锁使用极不方便，为满足人们对门锁的使用需求，增加其安全性，基于单片机的门禁系统应运而生。本设计采用单片机AT89S51作为主控中心，以键盘密码的输入方式实现对门的出入控制，或者通过键盘输入门号的方式，进行对讲方式住户实现开门。适用于普通小区单元楼的进入控制，该系统可实现密码输入开门、语音对讲开门、密码修改、报警和锁定键盘等功能柳条剥皮机 ，同时该门禁系统还具有设计方法合理，简单易行，成本低，安全实用等特点，符合一般小区的使用需求，具有推广价值。t恤转印纸
太阳能充电背包关键词： 门禁系统；密码锁；AT89S51；4×4矩阵键盘
ABSTRACT
Contrary to the security for the daily life of the residential district, generally locks is not that convenient to use. In order to meet the users' needs about the security of the locks.So a microcontroller-based Access Control System control system came into being. This design based on a microcontroller AT89S51 which works as the control center, keyboard password input achieved the door access control, or by way of keyboard inputing numbers,and intercom way households the door. Applicable to ordinary residential unit building access control.This system can achieve password enter the door, voice intercom to open the door, password changes, the alarm and lock the keyboard and other functions.while the access control system also has a rational design method which is so simple, low cost,so safety and with many practical features,which can meet the general needs of the district, also is worth promoting.
全自动电脑针织机Key words: entrance guard system; Combination lock; AT89S51; 4 x 4 matrix keyboard
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