7 basic rfid tagging questions answered - the tagging team - the expert in rfid...
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RFID TAGGING EXPLAINED
10 Basic Questions Answered About RFID Tagging
WhatisRFIDTagging,10AnswerstotheTop10Questions
1. WhatisanRFIDTag?2. WhatdoesRFIDTaggingmean?3. WhatdoesanRFIDTagLookLike?4. WhatdoesanRFIDTagdo?5. CanyouputanRFIDTagonMetalItems?6. HowFarDoesanRFIDTagSignalTravel?7. HowLongDoesanRFIDTagLast?8. WhatCanRFIDTagsBeUsedFor?9. ShowMeSomeRealWorldBenefitsofRFID?10. WhatHappensNextWithRFID?
1. What Is An RFID TAG?
Basicdescription:anRFIDTagisanaerialwithasmallmicrochip.Themicrochipcanstoreasmallamountofdata,likeabarcode,plussomeotherinformationrelatedtotheitemortheowneroftheitemwiththetagon.WhentheTagreceivesaradiowavesignalthatsignalbrieflypowersthemicrochip.Theinitiatingdevicethenreceivesthedatafromthetag.Thisallhappensextremelyquickly.
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RFID TAGGING EXPLAINED
2. WHAT DOES RFID TAGGING MEAN?
RFIDTaggingistheplacingoftagsontoassetstoenablethoseassetstobemanaged.
ForRFIDenableditemslikeaccesscardsoranOystercardforexample,theRFIDtaggingprocessispartofthemanufacturingprocess.ItwouldnotbeclassedasRFIDtagging.
Foritemsthatare‘taggedatsource’,againthiswouldnotreallybewhattheindustryclassesasRFIDTagging.Whensomethingismanufacturedthereareoftenmanylabelsattached during the process, if thatmanufacturer puts an RFID tag on the item orpackagingitispartoftheoverallprocess,classedassourcetagging.
RFIDTaggingreallyreferstotheretrospectivetaggingofassets,manydifferenttypesofassets.
Thoseassetscouldbelibrarybooks,powertools,ITequipment,files,patientrecords,theyareallclassedasassets.
TheprocessofRFIDTaggingmeansthattheseassetshaveatagplacedonthem,usuallythetaghasanadhesiveback,thensomereferencetotheitemisprogrammedontotheRFIDtagsmicrochip.
Notalltagshaveadhesiveontheback,itdependswhattheyaremeanttobeattachedto.
Oncetheassethasatagattacheditcanbereadbyan‘RFIDReader’.UsuallytherearesomesecurityfeaturesbuiltinsoonlythedesiredRFIDReadercangetdatafromthetags.
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RFID TAGGING EXPLAINED
3. WHAT DOES AN RFID TAG LOOK LIKE?
TherangeofRFIDTagsisverywide,we’llgiveyoualinktoRFIDTagImages.But,allRFID Tags have one thing in common, they are built with pretty much the sametechnology.
ToseearangeofRFIDTagImages:CLICKHEREToSeeRFIDTagsBeingPutinLibraryBooksCLICKHERE
Thereisamicrochip,usuallysomewherenearthecentrebutnotalways.
Thereisanaerial,usuallydesignedlikethisone.
AnACTIVERFIDtagwillalsoincludeabattery.
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RFID TAGGING EXPLAINED
4 WHAT DOES AN RFID TAG DO?
AnRFIDtagisawayoftransferringinformationfromanitemtoareaderandthentoadatabaseofsomekind.
LibrarybooksareaneasywaytoexplainwhattheRFIDTag,andoverallRFIDsystem,do.
ThinkofaLibrarybookwithabarcodeon.Whenyouwanttoissueorreturnthebookyouneedtoscanthebarcode.Simple,butiftherearealottodoittakestime.Thesamethingwithcheckingthestockinalibrary.Ifyou’reonlyusingabarcodetheneachbookneedsindividuallychecking.
RFIDTagstakeawayabigpartofthelabourandtimeinvolvedincheckingitems.IftheTag only had the items barcode number in thatwould be enough to be beneficial.Ratherthanscanningasinglebarcodeatatimeyoucanreadalotofitemsveryquickly.
Figure1:TraditionalBarcodeMethod
ItemBarcode BarcodeScanned
1itemataTime
DatabaseAccessed
ItemRFID Tag
RFIDReaderReads6+Items
inunderasecond
MultipleItemsRead
DatabaseAccessed
10,000BooksWithRFIDTags
Portable RFIDReader,Logsall
BooksinMinutes
FullItemListGenerated
DatabaseUpdated
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RFID TAGGING EXPLAINED
5. CAN YOU PUT AN RFID TAG ON METAL
ITEMS?
Overthe last fewyearsthetechnologyhasadvanced,youarenowabletoRFIDTagmetalitems.
Thetagsarespecificallydesignedtobeplacedonmetal.Theyoperateinthesamewayasothertagsapartfromthedirectionoftheradiosignaltheygiveoff.Thisisbecausethesignalispushedawayfromthemetalitem,metalandRFIDsignalsdon’tmixwell.
6. HOW FAR DOES AN RFID SIGNAL TRAVEL?
FirstyouneedtoknowaboutdifferenttypesofRFIDTags,notshapesandsizesbutthedifferenttechnologyusedwithinthem.
Thecategoriesusedwidelyare:
HFTags–HighFrequency
UHFTags–UltraHighFrequency
BothtypescanbePassiveorActive(Activehasabatterypassivedoesnot)
HighFrequencymeansthattheradiowaveusedforthesetagsisontheHighFrequencyscale,UltraHighFrequencyoperatesonaHigherFrequencyscale.
UHFcantravelfurtherthanHF.ThemostbasicHFsystemsusingpassivetagsandsmallaerialscanonlyberead30-40cmaway. WhereasUHFwith largeaerialsandActive(powered)tagscanbereadupto100metersaway.
Thedifferencebetweenpassiveandactivetagsisimportant.Apassivetagdoesnothaveabattery in it, it ispoweredbythesignal itreceivesfromtheRFIDreader. AnActivetaghasabattery,whichmeansitbooststhesignalbeingsentout.
ThinkofthedifferencebetweenanOystercard,whereyouneedtoplaceitonareader,thisisHFPassivetechnology.WhereasasystemwhichreadsataginacartoconfirmithaspassedthroughatollroadisprobablyUHFActive.ThisisbecausethatsignalneedstotravelfurthersoUHFandActiveareusedtomakethishappen.
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RFID TAGGING EXPLAINED
There are many other variables in read range depending on the system, but theminimumisaround30cmandthemaximumaround100meters.
7. HOW LONG DOES AN RFID TAG LAST?
Thereisnodefinitiveanswertothisquestion.IntheoryaPassiveTagwithnobatteryshould,orcould, lasta lifetime. AnActiveTagwithabatterywill lastas longasthebatterylasts.Howlongthatisdependsonhowoftenthetaghastoomitasignal.
Thelifespanofanactivetagdependsonitsusesandenvironment,somewherebetween1yearand10years.
APassiveTaghoweverissimplerandhasnobatterytoreplyon.Intheoryitcouldlastalifetime,butthatwoulddependwhereiswasandhowitwastreated.
Likeanyelectronicdevice itwillbeeffectedbytemperature,humidity,handlingandwearandtear.
8. WHAT CAN RFID TAGS BE USED FOR?
Many Many Things, See Below:
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RFID TAGGING EXPLAINED
A Small Selection of Uses for RFID Systems
9. REAL WORLD BENEFITS OF RFID? 1. Ifyouknowwhatyouhaveyouknowwhatyouneed.Retailstoreshaveshownan
8%salesgrowth(thefiguresvary,8%isonthelowside)fromknowingwhattheyhaveinrealtime.Customersarefickle,ifit’stheretodaythey’llgetitbecausethat’swhattheycamefor,theymaynotcomebackifit’snotthere.UsingRFIDtechnologyforrealtimestockanalysismeanspopularitemsdon’trunoutofstock.
2. UsingRFIDtounderstandyourequipmentstock.Werecentlytaggedequipmentforabuildingfirm,oncompletiontheclienthadaquicklookatthedatabase.“WhythehellhasTonygot5ofthose”.TheimmediateinferenceisthatTony,andpossiblymanymorepeoplewithinthecompany,likedtohogcertaintools.Bydoingsotheyarenotdeployedcorrectlyandreplacedunnecessarily.Thesavingsaredifficulttoassesssoearlyintheprocess,buttheyareexpectedtobeconsiderable.
•Legal•Medical•Accounting•Many More
•LibraryBooks•Retail Stores•Pallets ofgoods•Containers ofgoods•Thecontainersthemselves•ManyMore
•OysterCards•DisneyParkPasses•DoorAccess•ManyMore
•CasinoChips•Golf Balls(comingsoon)•ITAssets•PowerTools•HealthcareEquipment•ManyMore
Tracking Access
DocumentsStockControl
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RFID TAGGING EXPLAINED
3. Librarybooks.ProbablyoneofthesimplerformsofRFID,replacingabarcodewithan RFID tag that holds the barcode details in it. Quite apart from the fact thatreaderscanissueandreturnmultiplebooksinseconds,comparedtoqueuingupatacounterorscanningeachoneseparately.Thetechnologyallowsalibraryofsay50,000 books, or aUniversitywith 350,000 books, to be stock checked in a tinyfractionofthetimeitwouldtakewithbarcodes.Itcanalsolocatebookswhichhavebeenre-shelvedincorrectly,orscanashelfandcheckthebooksareinthecorrectorder.Itcanevenfindbookshiddeninvariousweirdandwonderfulplacesaroundthelibrary.
4. TherearesomanyexamplesofrealworldbenefitstoRFID. Thesearticles intheRFIDJournalareexcellentexamples:ClickHere
10. WHAT HAPPENS NEXT WITH RFID?
ForaveryinterestingarticleonnewandupcomingRFIDdevelopmentsfromRFIDArenaClickHere.
Toreceiveourupcomingindustryexperts’viewsonRFIDadvancements,ClickHere