Dziwani udindo wa kuyamwa zinthu mu RFID tag yotsutsana ndi zitsulo

Chizindikiro cha RFID chotsutsana ndi zitsulo, yotchedwanso uhf RFID Chiphaso Chotsutsa Chitsulo, ndi ma tag amagetsi opangidwa ndi zinthu zoyamwa zomwe zimagwira ntchito zoletsa kusokonezedwa. Amathetsa bwino vuto la zonyamulira zitsulo zomwe zimasokoneza ma frequency a wailesi a ma tag amagetsi omwe amamangiriridwa pamwamba pawo.

Pa ma tag a RFID achitsulo ndi zinthu zoyamwitsa zimakhala ndi makhalidwe awa:

1. Ogwiritsa ntchito pa chitsulo Chikwangwani cha Rfidakhoza kusintha momwe deta yawo imawerengedwera kuti awonjezere magwiridwe antchito a pulogalamuyo;

2. Ma tag a RFID oikidwa ndi zitsulo ali ndi mtunda wautali wowerengera (mtunda wowerengera ndi kulemba umagwirizana ndi chowerengera cha RFID ndi antenna);

3. Mphamvu yolimbana ndi kusokoneza zinthu mwamphamvu kwambiri;

4. Kusunga deta nthawi yayitali, mpaka zaka 20, magwiridwe antchito okwera mtengo;

5. Kuwerenga ma tag ambiri sikukhudzidwa kapena kuchepetsedwa ndi kuchuluka kwa ma tag omwe ali pamalo ogwirira ntchito;

6. Ma tag a RFID a pamwamba pa zitsulo amagwiritsa ntchito kapangidwe ka gulu logwira ntchito pafupipafupi kwambiri, komwe sikuti kokha kumangotsatira malamulo ofunikira amakampani, komanso kumatha kupangidwa ndikugwiritsidwa ntchito mosavuta;

7. Malo osungiramo zinthu ndi a ogwiritsa ntchito kuti azitha kuwerenga, kulemba, kufufuta ndi kulembanso zinthu mobisa, ndipo amathanso kutchula malo okhazikika operekedwa kwa ogwiritsa ntchito.
Ndi chitukuko cha intaneti ya zinthu, kugwiritsa ntchito zinthu zoyamwa mu ma tag a RFID kwafala kwambiri tsopano. Chiphaso chachitsulo cha UHF imagwiritsidwanso ntchito m'malo osiyanasiyana, kuphatikizapo kasamalidwe ka zinthu, kasamalidwe ka malo osungiramo katundu, kasamalidwe ka katundu ndi malo ena. Ndiye kodi ntchito yoyamwa zinthu mu chizindikiro chachitsulo cha uhf ndi yotani?

Mu RFID frequency range, pamene mafunde a electromagnetic akumana ndi pamwamba pa zitsulo, chifukwa cha eddy current, mafunde amphamvu a electromagnetic amawunikiridwa, ndipo pali kusiyana kwa gawo pakati pa mafunde a electromagnetic omwe amawunikiridwa ndi mafunde ochitika, zomwe zimapangitsa kuti pakhale kuletsana. Pakadali pano, mphamvu ya electromagnetic yogwira ntchito imachepa mwachangu, chifukwa kukana kwa zinthu zachitsulo kutsika, kutayika kwa eddy current kudzakhala kwakukulu, ndipo vuto lachitsulo limakhala lalikulu kwambiri. Chifukwa chake, pamene antenna ikusokonezedwa kwambiri ndi zitsulo, malangizo operekedwa ndi wowerenga khadi adzasowa kwathunthu, kotero zotsatira za kuwerenga deta zimakhala zolephera. Zinthu zomwe zimayamwa zimagwiritsa ntchito mphamvu yayikulu ya maginito. Zikagwiritsidwa ntchito, pepala loyamwa limayikidwa pakati pa antenna yozungulira ya chiphaso chachitsulo cha uhf RFID ndi gawo lachitsulo, lomwe limawonjezera mwayi wa mphamvu ya maginito yomwe imayambitsidwa kudutsa muzinthu zoyamwa zokha ndikuchepetsa mwayi wodutsa mu mbale yachitsulo, motero kuchepetsa mphamvu ya eddy yomwe imayambitsidwa mu mbale yachitsulo. Zinthu zoyamwa zimachepetsanso kutayika kwa mphamvu ya maginito yomwe imayambitsidwa. Nthawi yomweyo, chifukwa choyika pepala loyamwa la maginito, mphamvu ya parasitic yomwe imayesedwa idzachepetsedwanso, ndipo frequency offset idzachepetsedwa, zomwe zimagwirizana ndi kuchuluka kwa resonant kwa wowerenga khadi, motero zimathandizira kwambiri kuwerenga kwa khadi komanso mtunda.

Mu RFID frequency range, pamene mafunde a electromagnetic akumana ndi pamwamba pa zitsulo, chifukwa cha eddy current, mafunde amphamvu a electromagnetic amawunikiridwa, ndipo pali kusiyana kwa gawo pakati pa mafunde a electromagnetic omwe amawunikiridwa ndi mafunde ochitika, zomwe zimapangitsa kuti pakhale kuletsana. Pakadali pano, mphamvu ya electromagnetic yogwira ntchito imachepa mwachangu, chifukwa kukana kwa zinthu zachitsulo kutsika, kutayika kwa eddy current kudzakhala kwakukulu, ndipo vuto lachitsulo limakhala lalikulu kwambiri. Chifukwa chake, pamene antenna ikusokonezedwa kwambiri ndi zitsulo, malangizo operekedwa ndi wowerenga khadi adzasowa kwathunthu, kotero zotsatira za kuwerenga deta ndi kulephera. Kugwiritsa ntchito kwakukulu kwa mphamvu yamagetsi yochulukirapo ya zinthu zomwe zimayamwa ndikuyika pepala loyamwa pakati pa chiphaso chachitsulo cha uhf RFIDAntena yooneka ngati chitsulo ndi gawo lachitsulo, zimawonjezera mwayi wa mphamvu ya maginito yomwe imayambitsidwa kudutsa muzinthu zoyamwa zokha ndikuchepetsa mwayi wodutsa mu mbale yachitsulo, motero zimachepetsa mphamvu yamagetsi yomwe imayambitsidwa yomwe imapangidwa mu mbale yachitsulo, ndipo zinthu zoyamwa zimachepetsanso kutayika kwa mphamvu ya maginito yomwe imayambitsidwa. Nthawi yomweyo, chifukwa choyika pepala loyamwa la maginito loyamwa, mphamvu ya parasitic yomwe imayesedwa idzachepetsedwanso, kuchotsera pafupipafupi kudzachepetsedwa, ndipo kudzakhala kogwirizana ndi kuchuluka kwa ma resonance kwa wowerenga khadi, motero kumathandizira kwambiri kuwerengera kwa khadi ndi mtunda.

Mapulojekiti ena m'moyo amakumana ndi malo osiyanasiyana, monga kutentha kwambiri ndi kotsika, zamadzimadzi, makoma a simenti, mphamvu ya maginito, chitsulo, ndi zina zotero.

Mwachitsanzo, m'malo okhala ndi zitsulo, mu dongosolo lozindikiritsa ma frequency a wailesi la ultra-high frequency (UHF), zimakhala zovuta kwambiri kuzindikira ma tag omwe ali pa zonyamulira zitsulo chifukwa zopinga zachitsulo zimawonetsa ndikusokoneza mafunde amagetsi. Pakadali pano, pali njira zinayi zothetsera vuto lojambula chidziwitso pamwamba pa zitsulo:

1. Gwiritsani ntchito zinthu zoyamwa kuti muyamwe mafunde ochulukirapo amagetsi;

2. Kapangidwe ka kutalika kwa Pad;

3. Kuchuluka kwa bandwidth ya tag antenna kuyenera kukhala kokwanira;

4. Kapangidwe ka antenna yokhazikika.

Pakadali pano, njira yathu yodziwika bwino ndikugwiritsa ntchito zinthu zoyamwa ndi kutalika kwa ma pad pamodzi. Njira yabwino ndiyo kupanga antenna yokhala ndi bandwidth yayikulu kenako ndikugwiritsa ntchito zinthu zoyamwa kuti zifike kutalika kwa ma pad, zomwe zidzapeza zotsatira zabwino kwambiri.