Kodi RFID Imasunga Bwanji Ndi Kutumiza Data?

 

Menyani tagi ya RFID pachilichonse ndipo mutha kuwerenga-aliyense amene adasungapo zinthu zosungiramo katundu amadziwa momwe zinthuzi zilili zosavuta. Koma kumasuka pambali, ngati mufunsa anthu ambiri kuti afotokoze momwe deta imalowera ndi kutuluka, sangathe. Nditangolowa m’makampani amenewa, nanenso ndinali nditatayika kwambiri. Zinanditengera kuwotchedwa ndi ogulitsa kangapo ndisanaganizire zinthu.

 

Chip mkati mwa tag ndi chaching'ono kwambiri moti simungathe kuchiwona ndi maso, koma chimakhala ndi malo osungira. Kutengera mtundu wa chip-otsika mtengo ali ndi 96-bit EPC yokha, okwera mtengo amatha kufika ma kilobytes angapo. 96 amamveka ang'onoang'ono, koma ndi okwanira. Sinthani kukhala hexadecimal ndipo mumapeza zilembo 24, zochulukirapo kuti musunge nambala yazogulitsa. Ndawonapo makasitomala akuumirira kukakamiza masiku opanga, manambala a batch, ndi masiku otha ntchito zonse mu tag. Pambuyo pochita masamu, ma tag okhala ndi kukumbukira kwakukulu kwa ogwiritsa ntchito amawononga kuwirikiza katatu. Anamaliza kungosunga ID ndikuyika china chilichonse mu database.

 

 

Anthu ena amafunsa momwe ma tag amasungira deta popanda mabatire. Ndinafunsanso funso lomweli m'mbuyomo. Zikuoneka kuti amagwiritsa ntchito EEPROM, malo osungira omwe amasunga deta popanda mphamvu. Mosiyana ndi kukumbukira kwa USB flash, EEPROM imatha kusinthidwa ndi byte, pomwe flash imayenera kufafaniza midadada yonse. Ndizoyenerana bwino ndi RFID pomwe nthawi zambiri mumasintha zolemba zanu. Zomwe zalembedwamo zimatha zaka khumi mpaka makumi awiri{5}}kuposa tagiyo.

 

Mfundo yotumizira deta imakhala yochepa. Ma tag alibe ma transmitter ndipo samatumiza ma siginecha mwachangu. Wowerenga amatulutsa mafunde a electromagnetic, mlongoti wa tag umawanyamula ndikutulutsa mphamvu, ndipo chip chimayendera mphamvu yaying'onoyo. Kenako chip chimachita chinthu chimodzi: chimasintha mobwerezabwereza kutsekeka kwa mlongoti. Impedans ikasintha, mphamvu ya mafunde a electromagnetic amasintha nayo. Wowerenga amazindikira kusiyanasiyana kumeneku mumayendedwe owoneka bwino{{5}okwera, otsika, otsika, otsika-ndiwo ma 0 ndi ma 1 anu.

 

 

Izi zimatchedwa backscatter. Ndikawafotokozera makasitomala, nthawi zambiri ndimadumpha nthawi imeneyo-yamaphunziro kwambiri. Ndikungonena kuti chizindikirocho chili ngati galasi-losuntha. Wowerenga amawunikira tochi yake, ndipo chizindikirocho chimawonetsa kuwalanso mumayendedwe akeake mwa kusintha mbali ya galasi. Osati zolondola mwangwiro, koma zosavuta kumvetsa.

 

M'mapulojekiti enieni, vuto lalikulu kwambiri si malingaliro-ndikusokoneza chilengedwe. Chitsulo chimawonetsa mafunde amagetsi, madzi amawayamwa, ndipo malo osungiramo zinthu amakhala odzaza ndi zonse ziwiri. Chaka chatha ndinapanga pulojekiti ku distillery. Ma tag anali pamabotolo agalasi. Mabotolo opanda kanthu adapatsa kutalika kwa mamita anayi mpaka asanu. Wodzazidwa ndi mowa, womwe umatsikira pansi pa mita imodzi. Pambuyo pake tinathetsa izi posintha ma tag. Chitsulo ndi choipa kwambiri. Kalasitomala kamodzi anakakamira ma tag pa ng'oma zachitsulo-sanathe kuwawerenga mpang'ono pomwe. Tidagwiritsa ntchito anti{11}}ma tag achitsulo okhala ndi ma wave{12}}zinthu zoyamwa pansi. Mtengo unakwera kasanu ndi kawiri kapena kasanu ndi katatu.

 

Ma frequency band amafunikiranso. UHF yaku China imagwiritsa ntchito 920-925 MHz, US imagwiritsa ntchito 902-928, Europe imagwiritsa ntchito 865-868. Mukamagula owerenga, fufuzani kuti ndi magulu ati omwe amathandizira, apo ayi zida zotumizidwa kunja sizingagwire ntchito kunyumba. Ndawonapo anthu akugula owerenga ogwiritsidwa ntchito ku US kuti asunge ndalama, koma amapeza kuti gulu la pafupipafupi linali lolakwika ndipo sanathe ngakhale kulibwezera.

 

 

Pali ochepa opanga tchipisi. Mndandanda wa Impinj wa Monza uli ndi gawo lalikulu kwambiri pamsika. UCODE wa NXP ndiwofalanso. Ma tchipisi osiyanasiyana ali ndi masinthidwe osiyanasiyana amakumbukiro ndi zomverera. Kukhudzika kwakukulu kumatanthauza kuti mphamvu yaying'ono imatha kuyambitsa tag, zomwe zikutanthauza kuti nthawi yayitali yowerengera. Posankha, yang'anani pulogalamu yeniyeni-osangoyang'ana mtengo.

 

Kulemba kuzungulira ndi gawo losavuta kunyalanyazidwa. EEPROM idavotera mizungu 100,000, zomwe zimamveka ngati zambiri, koma zochitika zina zimatha kugunda nambala imeneyo. Ndidagwira ntchito yoyang'anira ziwiya zobwezeredwa pomwe kuyenda kulikonse komwe kumapita komanso kutuluka kumatanthawuza kuti munthu alembe ku tag. Kuzungulira katatu kapena kanayi patsiku, kupitilira chikwi pachaka, muzigwiritsa ntchito kwa zaka khumi ndipo mutha kukwanitsa. Ndinavomereza kusintha kwa kasitomala kuti awerenge-ma tag ophatikizidwa ndi nkhokwe yokha{7}}makiyo amangosunga ID, china chilichonse chimasinthidwa mumtambo. Vuto anapewa kwathunthu.

 

Musadalire chitetezo. Ma tag anthawi zonse alibe mawu achinsinsi pa EPC mokhazikika-aliyense akhoza kuwerenga kapena kulemba. Mutha kukhazikitsa mawu achinsinsi kuti mutseke, koma ndi ma 32 bits okha, osatetezedwa. Ntchito zowongolera ndi zolipira zimagwiritsa ntchito tchipisi tosiyanasiyana pamitengo yosiyana kotheratu. Matagi omwe amagwiritsidwa ntchito poyang'anira zinthu amakhala maliseche-komanso, sakusungabe data yamtundu uliwonse. Malingana ngati iwo akuwerengedwa, izo nzabwino mokwanira.