Design And Investigation On Contactless IC Card System

In receat years, with the developmellt of IC card technology, contactless IC cardlaPpeared and has been aPPlied to highWay charge and management, public ndc feecollection, automatic gate mangemen and material flow managemeni. In this thesis, theStruCtUr Principle tal the systeIn project of coodess IC card were investigated and thereader was also designed. The main researches are as follows:. Firstly, an equvalent circuit model of the indution power sapply of contatless IC cardwas presented by anaiyzing its work princiPle. CirCuit simulation wtth EWB software wasalso done, and the simulation results are agreement with the experimenal results. It is shownthat our presented circuit model was correct.Secondly, on the basis of analghng the fhahon of PCD reader of contactless IC card,the softwar flow chat of cothetless IC card controller based on chip-thoing algorithIn andthe hardwar circuit and anenna of the reader were designed. Then the designed PCD readerand wtnna were aPPlied to the real system. It is shown that the detCctive scope ofcontactless IC card was boroved.thedly, the method of cyclic redUndancy check (CRC) in system softwar design wasused to ensure the serial conununication reliability betWen contactless IC card and reader.This method can also control the presented bit ermr rate, ensure a higher conununicationefficiency and obtain the correct data comInunication betWeen the reader and the hostcomputer. Based on the act'Ual aPplication, an aPplication project of hosts1ave local netWorkwas also designed, Which is comPosed of the host computer and several readers.Finally, chaotic digital sequences were aPplied to secrecy comrnunication among ICcard system. The system model was designed and a simulation analysis for the secrecycoInInunication with computer was also given. The development trCnds of contactless of ICcard were Primary discussed.