Qhia rau koj paub lub luag haujlwm ntawm cov ntaub ntawv nqus dej hauv cov hlau tiv thaiv RFID tag

RFID tiv thaiv hlau cim npe, tseem hu ua uhf RFID Cov Cim Hlau Tiv Thaiv, yog cov cim hluav taws xob ua los ntawm cov ntaub ntawv nqus nrog cov haujlwm tiv thaiv kev cuam tshuam. Lawv daws tau qhov teeb meem ntawm cov hlau nqa khoom cuam tshuam rau cov teeb liab zaus ntawm cov cim hluav taws xob txuas rau lawv qhov chaw.

Rau ntawm cov hlau RFID cim npe nrog cov ntaub ntawv nqus dej muaj cov yam ntxwv hauv qab no:

1. Cov neeg siv ntawm cov hlau RFID Tags tuaj yeem kho qhov kev nyeem ntawm lawv cov ntaub ntawv txheem los txhim kho qhov ua tau zoo ntawm daim ntawv thov system;

2. Cov cim npe RFID uas muaj hlau mount muaj qhov ntev nyeem ntawv (qhov nyeem ntawv thiab sau ntawv muaj feem cuam tshuam nrog RFID nyeem ntawv thiab lub kav hlau txais xov);

3. Muaj peev xwm tiv thaiv kev cuam tshuam zoo heev;

4. Lub sijhawm khaws cov ntaub ntawv ntev, txog li 20 xyoo, kev ua haujlwm siab;

5. Kev nyeem ntau daim ntawv cim tsis cuam tshuam lossis txwv los ntawm tus lej ntawm cov cim npe hauv thaj chaw ua haujlwm;

6. Cov cim npe RFID rau cov hlau siv cov qauv tsim ua haujlwm dav dav, uas tsis yog tsuas yog ua raws li cov cai tswjfwm kev lag luam xwb, tab sis kuj tseem tuaj yeem tsim thiab siv tau yooj yim;

7. Qhov chaw khaws cia yog rau cov neeg siv ua cov haujlwm nyeem ntawv, sau ntawv, rho tawm thiab rov sau dua, thiab tseem tuaj yeem teev ib qho chaw lo lus tshwj xeeb rau cov neeg siv.
Nrog rau kev txhim kho ntawm Is Taws Nem ntawm Yam, daim ntawv thov ntawm cov ntaub ntawv nqus dej hauv RFID cov cim npe tam sim no yog qhov ntau heev. UHF hlau cim npe kuj siv rau hauv ntau qhov chaw, suav nrog kev tswj hwm kev thauj mus los, kev tswj hwm tsev rau khoom, kev tswj hwm khoom vaj khoom tsev thiab lwm qhov chaw. Yog li lub luag haujlwm ntawm cov ntaub ntawv nqus dej hauv uhf hlau tag yog dab tsi?

Hauv RFID zaus ntau, thaum cov nthwv dej electromagnetic ntsib cov hlau, vim yog qhov tshwm sim ntawm eddy tam sim no, muaj zog electromagnetic nthwv dej reflection tsim, thiab muaj qhov sib txawv ntawm cov nthwv dej electromagnetic reflection thiab cov nthwv dej tshwm sim, ua rau muaj kev sib cais. Lub sijhawm no, lub zog electromagnetic tiag tiag txo qis sai, vim tias qhov qis dua qhov resistivity ntawm cov khoom siv hlau, qhov ntau dua qhov poob eddy tam sim no yuav, thiab qhov teeb meem hlau loj dua ua rau. Yog li ntawd, thaum lub antenna raug kev cuam tshuam hlau hnyav, cov lus qhia uas tus nyeem ntawv daim npav muab yuav ploj mus tag, yog li cov ntaub ntawv nyeem tau ua tsis tiav. Cov khoom siv nqus feem ntau siv cov khoom permeability siab magnetic. Thaum siv, daim ntawv nqus tau ntxig rau ntawm lub antenna voj voog ntawm UHF RFID hlau cim npe thiab cov hlau substrate, uas ua rau muaj feem ntau ntawm lub zog magnetic induced hla dhau cov khoom siv absorbing nws tus kheej thiab txo qhov feem ntau ntawm kev hla dhau lub phaj hlau, yog li txo cov induced eddy tam sim no tsim nyob rau hauv lub phaj hlau. Cov khoom siv absorbing ntxiv txo qhov poob ntawm lub zog magnetic induced. Tib lub sijhawm, vim yog qhov ntxig ntawm cov khoom siv absorbing magnetic cais daim ntawv, qhov ntsuas parasitic capacitance kuj yuav raug txo, thiab qhov zaus offset yuav raug txo, uas yog sib xws nrog lub zaus resonant ntawm daim npav nyeem ntawv, yog li txhim kho daim npav nyeem ntawv nyhuv thiab qhov deb.

Hauv RFID zaus ntau, thaum cov nthwv dej electromagnetic ntsib cov hlau nto, vim yog qhov tshwm sim ntawm eddy tam sim no, muaj zog electromagnetic nthwv dej reflection tsim, thiab muaj qhov sib txawv ntawm cov nthwv dej electromagnetic reflection thiab cov nthwv dej tshwm sim, ua rau muaj kev sib cais. Lub sijhawm no, lub zog electromagnetic tiag tiag txo qis sai, vim tias qhov qis dua qhov resistivity ntawm cov khoom siv hlau, qhov ntau dua qhov poob eddy tam sim no yuav, thiab qhov teeb meem hlau loj dua ua rau. Yog li ntawd, thaum lub antenna raug kev cuam tshuam hlau hnyav, cov lus qhia uas tus nyeem ntawv daim npav muab yuav ploj mus tag, yog li cov ntaub ntawv nyeem tau tshwm sim yog qhov tsis ua tiav. Kev siv tseem ceeb ntawm cov yam ntxwv permeability siab ntawm cov khoom siv nqus yog ntxig daim ntawv nqus ntawm UHF RFID hlau cim npe's lub kav hlau txais xov zoo li tus thiab cov hlau substrate, ua rau kom muaj feem ntau ntawm lub zog magnetic induced hla dhau cov khoom siv absorbing nws tus kheej thiab txo qhov feem ntau ntawm kev hla dhau lub phaj hlau, yog li txo qhov induced eddy tam sim no tsim nyob rau hauv lub phaj hlau, thiab cov khoom absorbing ntxiv txo qhov poob ntawm lub zog magnetic induced. Tib lub sijhawm, vim yog qhov ntxig ntawm cov khoom siv absorbing magnetic cais daim ntawv, qhov ntsuas parasitic capacitance kuj yuav raug txo, qhov zaus offset yuav raug txo, thiab nws yuav sib xws nrog lub zaus resonance ntawm daim npav nyeem ntawv, yog li txhim kho daim npav nyeem ntawv thiab qhov deb.

Qee qhov project hauv lub neej yuav ntsib ntau yam ib puag ncig, xws li qhov kub siab thiab qis, kua, phab ntsa cement, lub zog magnetic muaj zog, hlau, thiab lwm yam.

Piv txwv li, nyob rau hauv ib puag ncig hlau, nyob rau hauv lub ultra-high frequency (UHF) xov tooj cua zaus cim npe system, nws yog ib qho nyuaj heev rau txheeb xyuas cov cim npe txuas nrog cov hlau nqa vim tias cov hlau thaiv yuav cuam tshuam thiab cuam tshuam rau cov electromagnetic nthwv dej. Tam sim no, muaj plaub txoj hauv kev los daws qhov teeb meem ntawm kev ntes cov ntaub ntawv ntawm cov hlau nto:

1. Siv cov ntaub ntawv nqus dej kom nqus tau cov nthwv dej electromagnetic ntau dhau;

2. Tsim qhov siab ntawm lub ncoo;

3. Qhov bandwidth ntawm lub antenna tag yuav tsum txaus;

4. Tsim cov kav hlau txais xov uas muaj av.

Tam sim no, peb txoj kev siv dav dav yog siv cov khoom siv nqus thiab qhov siab ntawm lub ncoo ua ke. Txoj kev zoo tshaj plaws yog tsim lub kav hlau txais xov nrog cov bandwidth loj thiab tom qab ntawd siv cov khoom siv nqus kom qhov siab ntawm lub ncoo, uas yuav ua tiav qhov zoo tshaj plaws.