Download - RFID Presentation
RFID inSupply Chain Management
-by Bhupendra
What is Radio Frequency Identification (RFID) ?
RFID is the use of small devices that can be electronically identified at a distance, through many obstruction, using radio waves or adjoining frequencies.
AdvantagesWorks under adverse conditions
Reading is done without any human intervention
Read writer can be used to record new information on the tag
RFID Label
RFID Label
Passive Semi-ActiveActive
Types of RFID
When RFID tag is within the interrogation zone of the reader (i.e.. interrogator) equipment, sufficient power is extracted from the interrogator to power up the tag or circuit, or special reflective material. It then transmitting data back to the interrogator. This is known as Passive RFID.
Most SimpleDo not require integrated power sourceThe most inexpensive tag
Passive RFID
The battery is used to back up the memory and data, but not to boost range.
More complexRequires integrated power supplyHigher cost
Semi-Active RFID
These RFID incorporate a battery to increase range (typically by a factor of 3 over passive) for collating data, tag-to-tag communication etc.
More complexRequires integrated power supplyHigher cost
Active RFID
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< 60 cm
Short range Passive RFID tag system
Short range Passive RFID tag system
Short range passive system works at a range of upto 60 cm and monitors seperated single products on conveyor belt or by hand scanning.
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< 3. 5 m
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Medium range passive RFID system
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Medium range passive RFID system
These systems have a range of upto 3.5 m.Used with sensors around warehouse door.Entry to the aircraft.
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100 m
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Long range two way active RFID system
Long range two way active RFID system
Large numbers of packages can be managed.Wide area can be covered.Range from 50 to 100 m.
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500 - 1000 m
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Real time locating system
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Real time locating system
Range upto a 1000 meter Real time location for large active areaHigh accuracy
Retail supply chain
Supplier Retailer Consumer
RFID
Data recorded on tag
Serial numberProduction dateFilling dates and sitesTare weight etc.
Packaging applicationsMaximumRange
Example ofapplication
Purpose Mode
40 Microns Touch outsid ofpaper packaging tosense tag inside
Anti- counterfeit andtracking
Disposable tag
Fewcentimeter
Retail products taglike a label
Track, trace and anti-counterfeit
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1 meter Automatic sorting ofair freight andcourier parcels
Track and trace, securitystatus update
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Up to 100meters
Location of largecrates etc. (Largeheavy tag needed)
Read onlyReusable tagActive
Up to akilometer
Read only tag
Benefits
Inventory ReductionReduced Safety StockReduction in lost/ misplaced inventoryFirst in First out (FIFO) statusmost accurate physical inventory/cycle counting
Benefits
Better ware house managementreduction of misplaced productimproved labor productionphysical inventory time savingeliminate paper work and data entryreduced search timereduced shipping returns
Benefits
Improved space utilizationreduced inventory results in more usable space and better utilization of resources
Increased picking accuracy
Approach to an RFID project
The majority of projects will involve replacing of existing manual, barcode magnetic stripe or other system for tracking or tracing.Scope for improved must be noted.An estimation of cost must be made.Necessary process changes and adjustments should be analyzed.
Frequency considerations
Frequency Benefits PossibleProblems
Uses
Low frequencyRF(50- 150 KHz)
Low interferenceLow costGlobally approved
Tag thicknessExpensive
ManufacturingLogistics
High frequencyRF(13.65 MHz)
Low interferenceGlobally approved
Range LibrariesPackages
UHF(900 MHz)
Longest RangeHigh bit rate
Water and some nonmetals can obscuretagLarge tag
Freight
Disadvantage
Reading the discarded tagsInjury from tagsAccidental eating of tags in foodShielding of tags accidently or deliberately so the product is not paid for at the checkoutGlobal standardsAdequate rangeRadiation laws and public perception
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