门禁系统的CSMA／CD协议仿真

作为一种安防产品，门禁系统已经广泛使用于企业、住宅等场所，其通信的稳定性决定了产品的优劣。设计的基于ARM和RFID的自制门禁系统可以把若干台门禁控制器通过CS—MA／CD网络相互连接起来组成网络系统应用。然后通过转化与计算机相连，用门禁管理软件对各个门禁控制器进行实时监控。主要阐述CSMA／CD协议在系统中的具体设计，并进行了仿真测试，效果良好。

CSMA/CD protocol simulation of the access control system

As a security products, access control system has been widely used in business, residential and other places, and the merits of the products are decided by the stability of its communication. In this a transformation, and monitors each access controller by access control management software for real-time monitoring. It focuses on specifically design of CSMA/CD protocol in the system, and its simulation test shows it well works.