Rfid Presentation 1
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Transcript of Rfid Presentation 1
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WHAT IS RFID?WHAT IS RFID?
An automatic identification method that relies onAn automatic identification method that relies on
storing and remotely retrieving data using devicesstoring and remotely retrieving data using devices
called RFID tags (or transponder).called RFID tags (or transponder). Can be incorporated into a product, animal or human.Can be incorporated into a product, animal or human.
Useful in purpose of identification & tracking usingUseful in purpose of identification & tracking using
radio waves.radio waves. Facilitates reading beyond line of sight of reader andFacilitates reading beyond line of sight of reader and
hence used over barcodes at many places.hence used over barcodes at many places.
An automatic identification method that relies onAn automatic identification method that relies on
storing and remotely retrieving data using devicesstoring and remotely retrieving data using devices
called RFID tags (or transponder).called RFID tags (or transponder). Can be incorporated into a product, animal or human.Can be incorporated into a product, animal or human.
Useful in purpose of identification & tracking usingUseful in purpose of identification & tracking using
radio waves.radio waves. Facilitates reading beyond line of sight of reader andFacilitates reading beyond line of sight of reader and
hence used over barcodes at many places.hence used over barcodes at many places.
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HISTORY OF RF IDENTIFICATION
1939- UNITED KINGDOM
(IFFF transponder)
1946-LEON THEREMIN
(covert listening device)
1948-HARRY STOCKMAN
(Communication by means of reflected
power)
1973-MARIO CARDULLOS(passive radio transponder with memory)
1983-CHARLES WALTON
(first patent by the name RFID)
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COMPONENTS OF RFCOMPONENTS OF RF--IDENTIFICATION SYSTEM:IDENTIFICATION SYSTEM:
An AntennaAn AntennaA transceiver (with decoder)A transceiver (with decoder)
A transponder (RF tag)A transponder (RF tag)
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READER TRANSPONDER
Reader can be hand held or fixed- mounted
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WORKING OF RF-ID SYSTEM
Antenna emits radio freq from 1 inch to 100 feet range
RFID tag when passes through the EM zone , it detects readers
activation signal
Reader decodes the data encoded on tags IC
These decoded data then passed to host computer for processing
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TYPES OF RF-ID
SYSTEMS
Low frequency system High frequency system
Freq range:-30-500 KHz
Short reading range
Low system cost
Used in animal
identification, assettracking , security access.
Freq range:-850- 950 MHz
and 2.4 2.5 GHz
Long reading range
High system cost
High reading speed Used in rail road tracking ,
automated toll collection
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TYPES OF RF-ID TAGSTYPES OF RF-ID TAGS
ACTIVE TAGSACTIVE TAGS PASSIVE TAGSPASSIVE TAGS
Powered by internal battery
Read/Write
Size up to 1 MB
Longer read range
Greater size, cost
Limited life(max. 10 years)
In adverse conditions
Power generated by reader
Read onlySize up to 32 to 128 bits.
Lighter
Shorter read range
Less expensive
Unlimited lifetime
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APPLICATIONS OF RF
IDENTIFICATION PASSPORTS
PRODUCT TRACKING
LAP SCORING IN RACES
ANIMAL IDENTIFICATION
INVENTORY SYSTEMS
HUMAN IMPLANTS
LIBRARY
SCHOOL AND UNIVERSITIES
ROAD TOLL MANAGEMENT
Human Implants
Electronic road pricing
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COMPARISON OF RFID & BARCODE
Beyond line of sight reading
Time /Speed of reading
Read/Write compatibility
No contact requiredRead through non-metallic substances
Work in challenging conditions
Wide range of automated data collection
As price of technology decreases RFID is becomingincreasingly prevalent. But highly unlikely to replace Barcode.
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LIMITATIONS WITH RFIDLIMITATIONS WITH RFID
y Privacy concerns
y Global standardization
y Open to exploits
y Passport Security
y Human Implants
y
RFID tag collisions
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SINGULATION THEOREM:
States that a reader identifies a particular tag only.
ZOMBIE RF TAG:
This tag is deactivated after leaving the store.
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REFERENCESywww.wikipedia.org
ywww.aimglobal.org
y
www.texasinstruments.comywww.rf-id.com
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THANK YOU !!