Tshaj txoj kev txhim kho xov tooj cua Ntau zaus (RFID) thev naus laus zis, ntau zaus zaus tau tawm mus, ua kom cov xwm txheej sib txawv thiab cov kev xav tau. RFID cov tshuab nyob rau ntau zaus cov hlua khi sib txawv hauv kev nyeem ntau, cov ntaub ntawv kis tau, thiab kev hloov kho ib puag ncig.
1. Tsawg zaus (LF)
LF RFID feem ntau ua haujlwm hauv kaum ob mus rau ntau pua ntawm cov caj dab kiloherrz. Nws cov yam ntxwv muaj xws li nyeem luv luv nyeem ntau, feem ntau yog ob peb centimeters, tab sis muaj zog anti- kev cuam tshuam nrog lub peev xwm thiab cov dej ruaj khov nyob ib ncig ntawm cov hlau thiab dej. Nws yog ib qho siv nyob hauv kev paub txog tsiaj, nkag mus tswj cov tshuab, thiab cov ntawv thov yuav tsum tau ua lag luam hauv cov hlau thiab dej).
2. Loj zaus (HF)
HF RFID feem ntau ua haujlwm nyob rau ntau zaus ntawm 13.56 MHz. Nws cov nyeem tau yog feem ntau ntawm ob peb centimeters thiab kaum centimeters thiab kaum centimeters, nrog cov nqi nrawm dua li LF thiab cov nqi qis dua. HF Technology yog dav siv nyob rau hauv cov npav caij tsheb npav, cov npav tswj xyuas, kev pib siv hluav taws xob, thiab kev tswj hwm tsev qiv ntawv.
3. Ultra - siab} siab siab (UHF)
UHF RFID feem ntau ua haujlwm nyob rau hauv 860- 960 MHz ntau, nrog cov zaus tshwj xeeb ntau zaus nyob ntawm tebchaws thiab cheeb tsam cheeb tsam. UHF RFID muaj ntau ntau nyeem ntau, xws li cov metres mus rau kaum tawm, thiab cov khoom siv nrawm, xws li cov ntaub ntawv ceev ceev, thiab kev txheeb xyuas cov tsheb.
4. Microwave band
Ntxiv rau qhov zaus zaus cov bands uas tau hais txog saum toj no, qee cov chaw rfid ua haujlwm ntawm microwave zaus, xws li 2.45 GHz lossis siab dua. Cov kab ke no muab cov ntaub ntawv sib txuas lus nrawm dua thiab tsim nyog rau kev siv uas xav tau kev sib txuas lus tiag tiag, tab sis lawv kuj muaj kev cuam tshuam rau ib puag ncig thiab cov nqi chij.
Cov khoom siv sib txawv ntawm RFID thev naus laus zis yog qhov tsim nyog rau kev sau ntawv sib npaug, thiab muaj microwave bands Thaum xaiv cov txheej txheem RFID, kev lag luam yuav tsum txiav txim siab tias qhov kev nquag siv no los siv raws li lawv cov kev pab cuam lag luam thiab ib puag ncig.
