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A Seminar on�Radio frequency identification (RFID)

Presented By

Harshal Umeshwar Borkar

Prn:-1930331372014

Under the guidance of

Prof. Tejas mahagaonkar

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Electronics And Telecommunication Department

Dr. Babasaheb Ambedkar technological University, lonere

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History

  • In 1945 Léon Theremin invented an espionage tool for the Soviet Union which retransmitted incident radio waves with audio Information.
  • Sound waves vibrated a diaphragm which slightly altered the shape of the resonator, which modulated the reflected radio frequency.

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Introduction

  • 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 Object.

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What is RFID (Radio frequency identification)

  • Radio frequency identification, or RFID, is a generic term for technologies that use radio waves to automatically identify people or objects.

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Components

  • Reader
  • RF tags
  • Controller

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Reader

  • Antenna are the conduits between the tag and the transceiver, which controls the system’s data Acquisition and communication.
  • The antenna emits radio signals to activate the tag and read and Write data to it.

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RF Tags

  • Passive tags
  • Active tags

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Passive tags

  • Passive tags do not carry on-board power and derive it from the reader to enable reading and Writing to the tag.

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Active tags

  • Active tags are the true transmitters of the information. These tags can initiate communication With the antenna and provides faster and higher storage capacity.

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Controller

  • The controller is the interface between one or more antenna and the device requesting information from or writing information to the RF tags.
  • There are controllers for interfacing antenna to PCs

servers and networks

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Block diagram

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How does an RFID system work?

  • An RFID system consists of a tag, which is made up of a microchip with an antenna, and An interrogator or reader with an antenna.
  • The reader sends out electromagnetic waves.

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Application

  • Consumer availability
  • Automatic check out
  • Security / access control
  • Theft protection

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Advantages

  • The tag does not need to be in line of sight with the receiver to be read (compare to a barcode and its optical scanner) (Shepard, 2004, p. 58).
  • RFID tags can store a lot of information, and follow instructions
  • Has the ability to pinpoint location

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Disadvantages

• Active RFID can be expensive because of batteries

�• There still needs to be regulations about RFID guidelines

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Conclusion

  • After examining the three fields Health care, Games and Human Activity Detection with Regard to the usage of RFID technology we will now try to present the overall observations And draw some conclusions.

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References

  • Dorman, D., 2002). Technically speaking: New vendors heating up Radio Frequency ID market,” American Libraries 33(3), 76.
  • How Stuff Works. Accessed on Oct. 17. 2009.