Intelligent Guard Control System On RFIC Card

In order to manage in and out rights of location area effectively, supervise in-and-out circumstances of control area in time, help workers stake out all kinds of cases out of the way, prevent various man-made errors, It is absolutely necessary to setup a set of modern intelligent access control system. It turns into the main direction in the development of toll and identify management system.Firstly, the knowledge and work principle is introduced in the paper. It illustrate feature and advantage of IC card though compare with the no-contact IC card. This paper main make a study of guard system with IC card. Which analysis the design of hardware and software detailed, gives out the main flow chart and program, it form a complete guard control system. At the same time this system can also monitor every family condition, so it can extend easily.The design of this system includes two parts:The first part is the identity and controlling of RFIC card. This part is mainly based on RFIC technique, and it takes W77E58 as the core entrance guarder. AT89C2051 is applied as the sub-processor that helps the main processor to sample and store external data signals. The keyboard and card-reader module zlg500B are the core-part of this entrance guard system. They communicate with PC computer to identify the correctly of the user. Besides, it has the state designation lights and buzzer using for the state designation of reading card. In addition, this part also includes the design of interface circuit of LCD and LED, chip of time and date DS1302,AT24C256 memory, and sample-circuit of analogous signals, digital signals and pulse signals.Another part is the management and controlling platform of the computer. This platform takes computer as support of hardware, takes WINDOWS as operating system and programs a various of software controlling program, which applies Visual C++ as core-operating software. It's management function are communicating with the identifying and controlling part through the parallel interface MAX232, managing the database of users'cards, passwords and the users who have cards, showing and storing passwords and cards operating information in time, managing and watching doors, windows, temperature inside, and other information.Above all, this design system is on the base of entering password and identifying cards intrinsic, adds the parts of sampling information inside, examining and watching. In addition it get along with the managing database in computer. Finally, this system realizes the effective and safe watching to the users'residence. It promotes the of the improvement intelligence degree of Intelligent Entrance Guard System, so this system has highly practical importance and market need.