The Design Of Baiyun Airport Access Control System

Security always takes the top priority of the civil aviation. In order to enhance securitysystem and access control, the BaiYun airport installation the access control system. Airportaccess system is a digital management system, at present, most airport uses the non-contact ICcard accesssystem for their special environment. As a new accesssystem, multi-networkingaccess contains the desktop or web browser management software, access controller and thecard reader, it can record access activities with other security system. In some highconfidentialityoccasion, it can also realize identity identification, positioning and regionalmonitoring, and other functions.This system can enhance functionally and applicability of theaccess management.This paper analyzes the factors of access control system and technical requirements,introduces the access control system design framework then. Secondly, thepaper designshardware circuit of access controller such as the characteristics and selection of ARM, powersupply circuit, extended memory circuits, input signal circuit, output signal circuit and RS485communication interface.In the reader design part, this paper introduces the principle of Radio Frequency IDrecognition technology and the system composition. Then this paper analyses the reader’shardware circuit design, especially RF IC circuit and antenna circuit. The article designsdirect antenna matching circuit, find the equivalent circuit, figure outthe circuit parameters,and then design each sub-circuit. Finally there is a introduction of keyboard circuit andWiegand interface circuit design.In the software part, this paper designs the communication process between RF card andreader, then designs the RF card reader communication program,designs the output processbase on Wiegand data and SPI communication program. In the end,this paper also designs theboot process of ARM and application program, and shows the application program designflow chart.The access control system has set up a file in the Baiyun Airport.