04-05-2012, 03:52 PM
RFID
rfid presentation.pptx (Size: 189.28 KB / Downloads: 36)
INTRODUCTION
RFID stands for radio frequency identification.
The technology which communicates through radio waves.
It serves the same purpose as bar code and magnetic strips.
HISTORY
Initially in 1945 LEON THEREMIN invented a tool.
But it is not pure RFID device.
In 1973 MARIO CARDULLO invented a passive transponder with memory capability.
Finally in 1983 pure modern RFID device was developed by CHARLES WALTEN.
COMPONENTS RFID
An electronic tag or microchip
A reader
A host computer
WORKING OF RFID
Tag comes in reader’s range, read or write operation can performed.
Working range varies from 1 inch to 100 feet.
When tag comes electromagnetic zone the tag activates.
Data transmitted may be details or location of object.
Main feature is ability to track objects.
TYPES OF RFID SYSTEM
Broadly classified into two categories.
1) Dependency on mobility:
Fixed RFID reader
Mobile RFID reader
Dependency on power source:
Active RFID tag
Passive RFID tag
APPLICATION
Assets tracking
Security & access control
Payment through mobile phones
Animal identification
Manufacturing
Retailing
Supply chain management
ADVANTAGES
In RFID system , no human interference.
Ability of tracking object.
Both read & write capability.
Longer reading range.
Easy to implement.
Contain not only unique code also other details of object.
Less sensitive to atmosphere.
Small in size.
LIMITATIONS AND THEIR MEASURES
Global standardization
Data collision
Security & privacy issue
Data flooding
Temperature explosion
Shielding
Exploitation