Research On Special Access Identity Authentication System

With the development of society and technologies, the importance of theidentity authentication is increasingly appeared, people for the entrance guardsystem security demands is also higher.According to the shortage of current special access identity authenticationsystem, the paper analyzes the advantages and disadvantages of current variou sidentification way, according to the modern special access's structure and functionsroughly, combine the traditional recognition and biological characteristicsidentification effectively, then realizing to design the modern special access identityauthentication system. This paper discusses issues from the following aspects.First, according to the important degree and requirements of special access,determined the identify way of each part and mutual commu nication among them.The subject using iris identity authentication in the entrance to the area, u singquality evaluation based on embedded system to pick out the image which i srecognizable by the computer from collected sequence images. Then the Computercalled the program to identify iris and return results. Due to the cost and easy tomaintenance, we use card identification in the buildings. In order to solve th edifficulties of wiring and wireless interference problems between inside and outsid eof the building, using wireless in building and cable among buildings to swap data,and real-time authorized way to release.Second, introduce the parts of hardware and related design, mainly include iriscollection part and card authentication part. Embedded sy stem uses developmentboard, main hardware is illu minant control circuit and door control circuit. The cardsystem u ses Single-chip microcomputer to be the main control chip, design includingcard reader, RS-485interface, etc.Last, it's the software design, the paper's focal point. If we call hardware th efoundation, then software is the soul. The software design includes iris collectionsystem with iris image quality assessment algorithmic based on Embedded Linu xsystem, card reader operation by single chip microcomputer, communication amongcomputer and much of single chip microcomputers based on RS-485, Computercommunication based on wireless module, PC software includes interface designRS-485communication program and database design, etc.