Momwe RFID imagwirira ntchito
Machitidwe a RFID ndi chitsanzo chabwino cha momwe matekinoloje atsopano angasinthire chithunzi cha msika, kupanga zinthu zatsopano ndikuthetsa mavuto angapo omwe poyamba ankasunga anthu ambiri usiku. Kuzindikiritsa mawailesi pafupipafupi, ndiko kuti, njira zozindikirira zinthu pogwiritsa ntchito mafunde a wailesi, zasintha kasamalidwe ka katundu wamakono, machitidwe odana ndi kuba, kuwongolera mwayi wopezeka ndi kuwerengera ntchito, zoyendera anthu onse ngakhalenso malaibulale.
Njira zozindikiritsira pawailesi zoyambirira zidapangidwa kuti zithandizire ndege zaku Britain ndikupangitsa kuti zitheke kusiyanitsa ndege za adani ndi ndege zogwirizana. Mtundu wamalonda wamakina a RFID ndi zotsatira za ntchito zambiri zofufuza ndi mapulojekiti asayansi omwe adachitika mzaka khumi za 70s. Zakhazikitsidwa ndi makampani monga Raytheon ndi Fairchild. Zida zoyamba za anthu wamba zochokera ku RFID - zokhoma zitseko, zotsegulidwa ndi kiyi yapadera yawayilesi, zidawoneka zaka 30 zapitazo.
ntchito mfundo
Dongosolo loyambira la RFID lili ndi mabwalo awiri apakompyuta: owerenga omwe ali ndi jenereta yothamanga kwambiri (RF), wozungulira wokhala ndi koyilo yomwe ilinso mlongoti, ndi voltmeter yomwe ikuwonetsa voteji mudera la resonant (detector). Gawo lachiwiri la dongosololi ndi transponder, yomwe imadziwikanso kuti tag kapena tag (Chithunzi 1). Ili ndi chigawo chowulungika chomwe chimasinthidwa pafupipafupi ndi siginecha ya RF. mu owerenga ndi microprocessor, amene amatseka (kuzimitsa) kapena kutsegula dera resonant mothandizidwa ndi lophimba K.
The owerenga ndi transponder tinyanga anayikidwa patali wina ndi mzake, koma kuti koyilo awiri ndi magnetically olumikizidwa kwa wina ndi mzake, mwa kuyankhula kwina, munda analengedwa ndi koyilo owerenga kufika ndi likulowerera transponder koyilo.
Mphamvu ya maginito yopangidwa ndi mlongoti wa owerenga imapangitsa kuti magetsi azithamanga kwambiri. mu koyilo yokhotakhota yambiri yomwe ili mu transponder. Imadyetsa microprocessor, yomwe, pakapita nthawi yochepa, yofunikira kuti pakhale gawo la mphamvu zofunikira pa ntchito, imayamba kutumiza chidziwitso. Pakuzungulira kwa ma bits motsatizana, kuzungulira kwa resonant kwa tag kumatsekedwa kapena kusatsekedwa ndi switch K, zomwe zimabweretsa kuwonjezereka kwakanthawi kochepa kwa chizindikiro chotulutsidwa ndi mlongoti wowerenga. Zosinthazi zimazindikiridwa ndi makina ojambulira omwe amaikidwa mwa owerenga, ndipo zotsatira za digito za data zomwe zimakhala ndi ma bits angapo mpaka mazana angapo zimawerengedwa ndi kompyuta. M'mawu ena, deta kufala kwa opatsidwa kwa owerenga ikuchitika ndi modulating kumunda matalikidwe analengedwa ndi owerenga chifukwa chachikulu kapena chochepa attenuation, ndi munda matalikidwe kusinthasintha mungoli kugwirizana ndi kachidindo digito kusungidwa mu kukumbukira transponder. Kuphatikiza pa chizindikiritso chapadera komanso chapadera chokha, ma bits owonjezera amawonjezedwa ku masitima apamtunda omwe amapangidwa kuti alole kutumiza kolakwika kukanidwa kapena kubwezeredwanso, motero kuwonetsetsa kuwerengeka.
Kuwerenga kumathamanga, kumatenga mpaka ma milliseconds angapo, ndipo kuchuluka kwa makina a RFID otere ndi mlongoti umodzi kapena awiri wowerenga.
Mudzapeza kupitiriza kwa nkhaniyi m’magazini ya December
Kugwiritsa ntchito ukadaulo wa RFID
