Taw qhia rau RFID nyeem ntawv thiab sau ntawv ua haujlwm

RFID xov tooj cua zaus txheeb xyuas siv xov tooj cua los xa cov teeb liab thiab tuaj yeem ua tiav cov ntaub ntawv tsis sib cuag. Txhawm rau kom muaj kev ua haujlwm zoo ntawm RFID system, nws yuav tsum muaj tsawg kawg yog ob ntu: daim npav hluav taws xob thiab tus nyeem ntawv / sau ntawv. Daim npav hluav taws xob yog cov ntaub ntawv nqa khoom ntawm RFID system, tsim los ntawm cov kav hlau txais xov tag thiab ib daim npav tshwj xeeb. RFID nyeem ntawv / sau ntawv yog cov cuab yeej tseem ceeb rau kev nyeem cov ntaub ntawv. Cia peb saib cov haujlwm ntawm RFID nyeem ntawv thiab sau ntawv.

 

1. RFID technology yog dab tsi

RFID xov tooj cua zaus identification yog ib tug uas tsis yog-hu rau tsis siv neeg identification technology uas cia li txheeb xyuas lub hom phiaj cov khoom thiab tau txais cov ntaub ntawv cuam tshuam los ntawm xov tooj cua zaus signals. Kev txheeb xyuas kev ua haujlwm tsis tas yuav muaj kev cuam tshuam los ntawm phau ntawv thiab tuaj yeem ua haujlwm hauv ntau qhov chaw hnyav.

RFID thev naus laus zis tuaj yeem paub txog cov khoom txav ceev ceev thiab ib txhij lees paub ntau lub cim npe, ua haujlwm nrawm thiab yooj yim. Cov khoom lag luam RF luv luv tsis ntshai tsam hnyav ib puag ncig xws li cov roj stains thiab plua plav paug, thiab tuaj yeem hloov cov barcodes hauv ib puag ncig, xws li taug qab cov khoom ntawm lub Hoobkas sib dhos kab. Cov khoom siv xov tooj cua ntev ntev feem ntau siv rau hauv kev thauj mus los, nrog kev paub txog qhov deb txog li kaum ntawm meters, xws li kev sau tus xov tooj tsis siv neeg lossis kev txheeb xyuas lub tsheb.

 

2. Dab tsi yog RFID systems suav nrog

RFID system muaj tsawg kawg yog ob ntu: daim npav hluav taws xob thiab tus nyeem ntawv / sau ntawv. Raws li txoj kev sib txawv ntawm cov khoom siv hluav taws xob ntawm cov khoom siv hluav taws xob, cov cim hluav taws xob tuaj yeem muab faib ua cov cim npe nquag, cov cim tsis muaj zog, thiab cov cim npe ib nrab thiab passive. Lub active electronic tag yog nruab nrog lub roj teeb, thaum lub passive RF tag tsis muaj lub roj teeb sab hauv. Semi & passive tag ib nrab tso siab rau lub roj teeb rau kev ua haujlwm.

Cov cim hluav taws xob tuaj yeem muab faib ua cov cim hluav taws xob tsawg tsawg, cov cim hluav taws xob ntau zaus, cov cim hluav taws xob ultra-high zaus, thiab cov cim hluav taws xob microwave raws li qhov sib txawv. Raws li cov ntawv ntim sib txawv, nws tuaj yeem muab faib ua daim npav rho nyiaj, daim ntawv lo kab, daim ntawv lo, daim ntawv lo iav raj, daim ntawv voj voog, thiab cov cim tshwj xeeb tsis xwm yeem.

RFID nyeem ntawv sib txuas lus wirelessly nrog RFID hluav taws xob cim npe los ntawm tus kav hlau txais xov, ua rau kev nyeem ntawv lossis sau cov cim cim cim thiab cov ntaub ntawv nco. Ib tus neeg nyeem / sau ntawv muaj xws li cov khoom siv ntau zaus (transmitter thiab receiver), tswj units, thiab nyeem ntawv / sau cov kav hlau txais xov.

 

3. RFID nyeem ntawv / sau ntawv ua haujlwm

Lub spatial (sib cuag) coupling ntawm RF signals ntawm hluav taws xob tag thiab nyeem tau tiav los ntawm coupling Cheebtsam. Hauv kev sib txuas sib txuas, kev hloov pauv hluav taws xob thiab cov ntaub ntawv sib pauv tau ua tiav raws li kev sib raug zoo ntawm lub sijhawm. Ntau workflows rau RFID systems, dab tsi yog workflows rau RFID systems

 

Kev ua haujlwm ntawm RFID nyeem ntawv / sau ntawv xa cov lus qhia:

1. Cov txheej txheem daim ntawv thov txheej txheem teeb tsa ib qho lus txib kom hu rau daim ntawv lees paub txheej txheej module, uas tsim cov lus qhia kom nkag mus rau cov ntawv xa mus thiab xa lawv mus rau hauv cov txheej txheem ua haujlwm hauv baseband.

2. Lub baseband processing modules encodes thiab modulates daim ntawv lo cim txheej cov lus qhia los tsim ib tug baseband teeb liab, uas yog muab faib ua ob txoj kev thiab kis los ntawm lub interface.

3. Cov ntaub ntawv tau ntim rau hauv lub teeb liab serial baseband thiab xa mus rau RF pem hauv ntej-kawg module.

4. Lub serial baseband teeb liab nkag mus rau hauv RF pem hauv ntej-kawg module, undergoes transformation, lub hwj chim amplification, thiab upconversion ua ntej yuav modulated rau lub ultra-high zaus band, thiab ces xa mus rau lub bandpass lim rau lim.

5.Tom qab kev lim dej, cov teeb liab raug xa mus rau lub hwj chim amplifier rau amplification, thiab ces xa mus rau lub kav hlau txais xov rau kev sib kis.

 

Kev ua haujlwm ntawm RFID nyeem ntawv tau txais daim ntawv lo rov qab cov ntaub ntawv cov ntaub ntawv:

1. Lub cim hluav taws xob RFID tau txais lub teeb liab los ntawm tus nyeem ntawv, tau txais lub zog, thiab yog qhib los ntawm lub hwj chim rau. Nws pib ua raws li tus nyeem ntawv hais kom ua thiab txiav txim siab seb puas xav tau cov lus teb. Thaum xav tau cov lus teb, cov lus teb yuav raug xa mus rau RF pem hauv ntej-kawg module los ntawm tus kav hlau txais xov nyob rau hauv ib qho backscatter.

2. Lub RF pem hauv ntej-kawg module xa cov teeb liab tau txais mus rau lub bandpass lim rau lim. Tom qab kev lim dej, cov teeb liab cov cab kuj tau rov qab mus rau lub teeb liab baseband thiab kis tau los ntawm qhov chaw xws li lub suab nrov qis, kev hloov pauv, thiab kev hloov pauv.

3. Cov ntaub ntawv raug xa mus rau baseband ua module nyob rau hauv lub PC los ntawm ib tug interface.

Los ntawm cov txheej txheem saum toj no, RFID system tau ua tiav cov ntaub ntawv lees paub thiab cov ntaub ntawv xa mus, muab lub hauv paus txhim khu kev qha rau kev siv dav dav ntawm kev siv tshuab tsis siv neeg tsis siv neeg paub txog.