Design And Development Of Intelligent Entrance Guard System Based On Contactless IC Card

The contactless IC card technology is a new technology in recent years. It is a technology that combines wireless identify technology with the IC card technology, and successfully solves passive (no power supply in card) and contactless problem, which is a breakthrough in the field of electronic device. With the development of social economy and science technology, the contactless IC card technology has been broadly applied by all kinds of trades, specially such as mass transit, wireless communication, identify, finance trade and safety-defend etc. Entrance guard system is a digitization management system, which manages personnel in and out. The contactless IC card becomes the mainstream of entrance guard system because of its higher security, better convenience and performance price ratio.The paper firstly introduces the technological development background and the current application situation for IC card, analyzes with emphasis the technology specialty and the application direction of contactless IC card. Then operational principle of contactless IC card is discoursed by studying on radio frequency identification technology. Mifare1 contactless IC card used in this system is briefly introduced, and the function and security performance of mifare1 card is analyzed. This paper elaborated the design goal and the main function would be realized in the system, and presented the structure and security mechanism of entrance guard system.The paper describes in detail the hardware and software design of the system. Aimed at the choice of various chips with emphasis, the micro-processing module PIC16F876, the read-write module MF RC500, the memory module AT24C64, and the communication module RC232/485 as well as the clock circuitry of this system had been analyzed concretely. Then the paper explains the choice of development tools for system design, the program of read-card procedure, the design of serial communication and the communication protocol of the system. After introducing the hardware and software of the system, the interface of the system running is given. Finally the paper summarizes the research course, and advances the prospect of contactless IC card and intelligent entrance guard system.