rfid tech. ppt

8/3/2019 Rfid Tech. Ppt

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Radio-frequency identification

is a technology that uses radio

waves to transfer data from anelectronic tag, called RFID tag

or label, attached to an object,

through a reader for the purpose

of identifying and tracking theobject.


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One or more RF tags

Two or more antennas One or more interrogators

One or more host computers Appropriate software


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RFID API Software

(Communicates with the RFID Reader)

Customer-Specific

Application Software

Host Computer

Host Memory Space

Reader

Antenna

Application

Program

Interface

(API)

Application

Program

Interface

(API)

Components of an RFID System


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Host Manages Reader(s) and Issues Commands

Reader and tag communicate via RF signal

Carrier signal generated by the reader upon request from

the host application

Carrier signal sent out through the antennas

Carrier signal hits tag(s)

Tag receives and modifies carrier signal & sends back

modulated signal Antennas receive the modulated signal and send them to

the Reader

Reader decodes the data & results returned to the host

application


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Tags can be read-only

or read-write

Tag memory can befactory or field

programmed and

optionally, permanentlylocked


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No need for contact or line-of-sight

Can scan entire pallet at once

Greater speed

Low error rates

Reduced counterfeiting

Size a grain of rice

Ability to hold more data than bar codes Durability


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Cost Passive tags: 30-50 cents

Would be economically viable at 5 cents

Lack of standards Proliferation of multiple operating frequencies

Need for standard electronic product code (EPC)

Efforts by ISO and ANSI

Privacy Implications of staying active beyond checkout Kill switches


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Access management

Tracking of goods and RFID in retail

Tracking of persons and animals

Toll collection and contactless paymentMachine readable travel documents

Smart dust (for massively distributed

sensor networks)

Tracking sports memorabilia to verify

authenticity

Airport baggage tracking logistics


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RFID technology uses waves to automatically identifyindividual items. After sixty years of development,RFID is being used in many fields.

However there are some hurdles needed to overcomebefore is becomes wide spread in the world .

One major problem is the high costs,

the other is privacy issue.

In the long run, the RFID technology,when perfected, would eventually be a

big help to human.


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rfid tech. ppt

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