RFID

A short and high-level intro into RFID

Transcript

1. Radio-frequency identification
   

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2. Radio-frequency
   identification (RFID) is the
   wireless non-contact use of
   radio-frequency
   electromagnetic fields to
   transfer data, for the
   purposes of automatically
   identifying and tracking tags
   attached to objects.
   

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3. Some tags require no
   battery and are
   powered and read at
   short ranges via
   magnetic fields
   (electromagnetic
   induction). Others use
   a local power source
   and emit radio waves
   (electromagnetic
   radiation at radio
   frequencies).
   

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4. The tag contains
   electronically stored
   information which may be
   read from up to several
   meters away. Unlike a bar
   code, the tag does not
   need to be within line of
   sight of the reader and
   may be embedded in the
   tracked object.
   

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5. RFID tags are used in
   many industries. An RFID
   tag attached to an
   automobile during
   production can be used
   to track its progress
   through the assembly
   line.
   

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6. Pharmaceuticals can be
   tracked through
   warehouses.
   

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7. Livestock and pets
   may have tags
   injected, allowing
   positive identification
   of the animal.
   

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8. Since RFID tags can be attached to
   clothing, possessions, or even implanted
   within people, the possibility of reading
   personally-linked information without
   consent has raised privacy concerns.
   

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9. An RFID system uses tags, or labels
   attached to the objects to be identified.
   Two-way radio transmitter-receivers called
   interrogators or readers send a signal to
   the tag and read its response. The readers
   generally transmit their observations to a
   computer system running RFID software or
   RFID middleware.
   

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10. Configurations
    • Passive Reader Active Tag (PRAT)
    • Active Reader Passive Tag (ARPT)
    • Active Reader Active Tag(ARAT)
    

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11. Passive Reader Active Tag (PRAT)
    • system that has a passive reader which
    only receives radio signals from active
    tags (battery operated, transmit only).
    The reception range of a PRAT system
    reader can be adjusted from 1-2,000
    feet. Thereby allowing for great flexibility
    in applications such as asset protection
    and supervision
    

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12. Active Reader Passive Tag (ARPT)
    • system that has an active reader,
    which transmits interrogator signals
    and also receives authentication
    replies from passive tags
    

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13. Active Reader Active Tag (ARAT)
    • system in which active tags are awoken
    with an interrogator signal from the
    active reader. A variation of this system
    could also use a Battery Assisted Passive
    (BAP) tag which acts like a passive tag
    but has a small battery to power the
    tag's return reporting signal.
    

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14. References
    • http://www.mayang.com/textures/Manmade/images/Paper/circular_design_paper_9001.jpg
    • http://www.howstuffworks.com/gadgets/high-tech-gadgets/rfid.htm
    • http://en.wikipedia.org/wiki/Radio-frequency_identification
    • http://api.ning.com/files/QFSjLPszBbnu4qF4LUg1MkX3gTJZ56r8InPoj4NDdHlRRrnKvwJJh8r-
    ZsadTQIjeZA*JkeTesnkJwbAobFyj*Psutf-cl-k/RFIDcapsule.jpg
    • http://itgsonline.com/wp-content/uploads/2007/10/2006-03-30_-_hands1.jpg
    • http://en.wikipedia.org/wiki/Microchip_implant_(human)
    • http://images.pressplaytv.com.s3.amazonaws.com/2012/06/5be1ad9430c22e9f28210accb49a2951.jpg
    

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