Radio-frequency
identification (RFID) is an automatic detection method, relying on
storing and remotely retrieving data using devices called RFID tags or
transponders. The technology requires some extent of cooperation of an RFID
reader and an RFID tag.
An RFID tag is an object that
can be applied to or incorporated into a product, animal, or person for the
purpose of identification and tracking using radio waves. Some tags can be read
from several meters away and beyond the line of sight of the reader.
Most RFID tags contain at least
two parts. One is an integrated circuit for storing and processing information,
modulating and demodulating a radio frequency (RF) signal, and other
specialized functions. The second is an antenna for receiving and transmitting
the signal.
There are generally two types of
RFID tags: active RFID tags, which contain a battery, and passive RFID tags,
which have no battery.This project uses passive tags. Read-only tags are
typically passive and are programmed with a unique set of data (usually 32 to
128 bits) that cannot be modified.
Future chip less RFID allows for
discrete identification of tags without an integrated circuit, thereby allowing
tags to be printed directly onto assets at a lower cost than traditional tags.
Currently (2008) none of the chip less concepts has become operational.
Today, RFID is used in
enterprise supply chain management to improve the efficiency of inventory
tracking and management.
APPLICATIONS OF RFID ?
1. Access Control System
2. Attendance Recording System
3. Bank Locker System
4. Vehical Parking System
5. Parts
Identification
6. Person
Identification
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