CovKev nyeem ntawv siab tshaj plaws ntawm RFID nyeem ntawvnyob ntawm ob peb yam: lubzaus, tag hom, hom kav hlau txais xov, lub zog nyeem ntawv, thiabib puag ncig. Tsis muaj ib tus lej universal, tab sis ntawm no yog cov ncauj lus kom ntxaws.
1️⃣ RFID Zaus & Hom Nyeem Distance
| RFID Hom | Ntau zaus | Hom Nyeem Distance | Sau ntawv |
|---|---|---|---|
| LF (tsawg zaus) | 125-134 kHz | 1-10 cm (0.4-4 nyob rau hauv) | Tsawg heev; siv rau kev tswj xyuas, tsiaj cim npe, muaj ID |
| HF / NFC (High zaus) | 13.56 MHz | 10 cm max (4 nyob rau hauv) | Smart cards, NFC xov tooj, cov phau ntawv qiv |
| UHF (Ultra-Ntau zaus) | 860–960 MHz | 1-12 m (3-40 ft) passive tags; mus txog 20+ m nrog siab -tau txais kav hlau txais xov | Warehouse, pallets, tolling, logistics |
| Active RFID | LF / HF / UHF nrog roj teeb | 30–100 m (100–300 ft); some special tags >1km ua | Roj teeb -hwj chim; feem ntau rau tsheb, ntim khoom, lossis kev taug qab cov cuab yeej cuab tam |
2️⃣ Yam cuam tshuam rau kev nyeem ntawv siab tshaj plaws
Nyeem Ntawv Lub Zog
Lub zog tso zis ntau dua ua rau kev nyeem ntau, tab sis yuav tsum ua raws li cov cai hauv zos
Piv txwv li: UHF cov neeg nyeem hauv Teb Chaws Asmeskas raug txwv rau 4 W ERP
Antenna Hom
Linear polarizedkav hlau txais xov → ntev ntau nyob rau hauv aligned orientation
Lub voj voog polarizedCov kav hlau txais xov → hloov tau yooj yim dua, tab sis luv dua me ntsis
Tag Hom
Passive tag→ powered los ntawm tus nyeem ntawv → luv luv
Active tag→ muaj roj teeb sab hauv → ntev dua
Tag kev taw qhia thiab kav hlau txais xov zoo kuj cuam tshuam rau kev ncua deb
Environmental Factors
Hlau, dej, thiab kua nqus los yog cuam tshuam cov cim RF
Qhib qhov chaw txhim kho kev nyeem ntawv; cluttered thaj chaw txo nws
Reader & Tag Positioning
Qhov siab, lub kaum sab xis, thiab kev ncua deb ntawm tus nyeem ntawv kav hlau txais xov thiab tag teeb meem
Kev sib raug zoo tsis zoo → txo qis kev nyeem ntawv siab tshaj plaws
3️⃣ Cov piv txwv zoo
Kev tswj qhov tseem ceeb fobs (LF / HF):0.5-10 cm
Library los yog NFC cards:10 cm max
Warehouse UHF pallet tag:3-10 m nrog cov kav hlau txais xov ruaj khov
Tsheb thauj neeg mob tag (UHF): 10–20 m
Active cuab tam taug qab:50-100 m lossis ntau dua, nyob ntawm lub roj teeb thiab ib puag ncig
4️⃣ Cov Ntsiab Cai
Qhov kev nyeem ntawv siab tshaj plaws yogsib txawv heevnyob ntawm qhov zaus, tag, thiab ib puag ncig
LF / HF / NFC:luv luv heev, nyeem meej
UHF passive:1-12 m, zoo tshaj plaws rau logistics, warehousing, inventory
Active RFID:30–100+ m, zoo tagnrho rau ntev -ntaus taug qab
Tsim nyogkav hlau txais xov xaiv thiab installationtsuas yog ib qho tseem ceeb raws li kev nyeem ntawv lub zog kom ua tiav qhov kev xav tau