Design Of Access Control System Based On TCP/IP Protocols

With the rapid development of computer and network technology, the Internet has been widely used in order to achieve a wide range of high-speed information transmission and the sharing of resources. By the development of networks, many companies carry out management by networks, in order to simplify operating and save manpower resources. Therefore, how to adapt the change and how to present a practical development method becomes the key element that access control system has to face. Internet-based access control system is the result of combining information network and control network. Transmitting the control data by network and completing the control tasks, it will extend the control area further push forward the control technology in the network, and further promote the access control technology along with the networked, distributed and open direction.With studying the TCP/IP technology, embedded system technology and the characteristics of access control system, the dissertation gives the design program of access control system based on embedded IP (uIP0.9), designs the network framework of the system and the access control system based on internet technology, and realizes the main functions such as network access.The embedded control system mainly consists of 89C52 microcontroller IC. The system is integrated by Ethernet module, real-time clock module, read & write module of radio frequency identification (RFID) IC Card, door magnet control module, etc. It meets the networked, distributed and open demand of entrance guard controlling system. Management software of entrance guard controlling system which is run on PC using Delphi 7.0 and paradox database is designed, it implements managing the settings and function of controller, for example, inserting or deleting the people who hold the cards, managing the authority of opening , searching the record, etc.