Radio frequency identification

By, Pratik Gupta 100101172 CS-A,1st year

RFID-What it is?
Radio-frequency identification (RFID) is an automatic identification method, relying on storing and remotely retrieving data using devices called RFID tags or transponders.
RFID (radio frequency identification) is a technology that incorporates the use of electromagnetic or electrostatic coupling in the radio frequency (RF) portion of the electromagnetic spectrum to uniquely identify an object, animal, or person.
An alternative to bar code .
RFID is also called dedicated short range communication (DSRC) .

Components of RFID

Components of RFID(cont’d)

Passive RFID Tags

Active RFID Tags
Battery Powered tags
Have much greater range – 100m
Hold much more information – Kbytes
Can integrate sensing technology
Temperature, GPS
Can signal at defined time
Multiple tags can be recorded at once
Used for higher value items
Shipping containers
Babies
Electronic assets
Cost between $20 and $40 per item
Life between 2 – 4 years

Components of RFID(cont’d) Active RFID Passive RFID Tag Power Source Internal to tag Energy transferred using RF from reader Tag Battery Yes No Availability of power Continuous Only in field of reader Required signal strength to Tag Very Low Very High Range Up to 100m Up to 3-5m, usually less Multi-tag reading 1000’s of tags recognized – up to 100mph Few hundred within 3m of reader Data Storage Up to 128Kb or read/write with sophisticated search and access 128 bytes of read/write

RFID Vs Bar Code RFID Barcode Forging is difficult Forging is easy Scanner not required. No need to bring the tag near the reader Scanner needs to see the bar code to read it RFID is comparatively fast Can read multiple tags Can read only one tag at a time Relatively expensive as compared to Bar Codes (Reader 1000$, Tag 20 cents a piece) Can be reusable within factory premises Cannot be reused

Gillette & Co:
Objective: To Track movement of product from Packaging Center to Plant’s distribution center.
Previously->Using Bar Code, time taken=80 sec to 20 min
1999->With RFID it takes 20 seconds.
Gains->Gillette saves 20% in Operational Cost at each Distribution Center.

Uses of RFID
Used where unique identification is needed.
Large Retail companies – Product Tracking.
Hospitals & Nursing Homes – Patient Tagging .
Airports – Baggage Tracking.
Security Applications – Contactless Smart Cards.
RFID Readers could also WRITE onto Tags.
RFID Sensors to sense temperature, movement, radiation, food quality.
Passports-UK, Australia, Finland, Ireland.
RFID is used in Libraries.
Replacing Barcodes.

Radio frequency identification

by Pratik Gupta

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