無線射頻辨識系統(Radio Frequency Identification;RFID)是利用RF能量來傳遞資料,屬於無線通訊(Wireless Communication)技術,是一種非接觸式的系統,其組成元件有讀卡機(Reader)、電子標籤(Tag)、天線(Antenna)、主電腦(Host)應用系統,其感應方式依被動式Tag(無電池)和主動式Tag(含電池)來區分,可分為感應耦合(被動式Tag)和反向散射耦合(主動式Tag)而感應耦合是屬於低頻、高頻的感應方式(如135KHz、13.56MHz),反向散射耦合是屬於超高頻、微波的感應方式(如915MHz、2.45GHz),而我們所建構的應用系統是使用高頻13.56MHz的感應耦合方式。 我們的研究,主要是利用RFID系統來達到更堅固的門禁系統,那我們的系統,除了解決一般傳統式的機械鎖的問題(如破壞鎖頭),我們也利用無線的方式來對系統作通訊,解除以往電子鎖需要繁雜的佈線問題,還有就是我們系統所使用的卡片是不可複製的MIFARE 卡,也就是現在所謂的悠遊卡,來加強系統的安全性。
Radio Frequency Identification System (RFID) BE make use of RF energy to deliver data,belong to a wireless communication technique,is 1 kind not the system of contact type,it constitutes the component contain the application system of the reader,electron label (Tag),Antenna,host computer (Host), its induction method depends on passive type Tag (Mayday pool) with active type Tag (contain battery) distinguish analyse, can be divided into induction coupling (passive type Tag) and back scattering coupling (active type Tag) and induced the coupling is the induction method (as 135 KHzs、13.56 MHzs) which belongs to low frequency、high frequency,the back scattering coupling is the induction method(as 915 MHzs、2.45 GHzs) which belongs to superhigh frequency,microwave, and what we construct apply system is use the high frequency 13.56 MHzs of induction coupling method. Our research,mainly is make use of RFID system to reach harder control at gate system,that our systems,in addition to resolving the problem (as puncture cotter head) of the mechanical lock of generally traditional type, we also make use of wireless mode to make telecommunication to the system, relieving former electron cotter to need a complicated problem of Bu wire, also having is the card that our system uses is the MIFARE card that can't make duplicate, is also a so-called tour card now, strengthen the safety of system.