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Wednesday, 27 March 2019

RFID connectivity Technologies in IoT

Introduction
  • RFID is an acronym for "radio-frequency identification"
  • Data digitally encoded in RFID tags, which can be read by a reader.
  • Somewhat similar to barcodes.
  • Data read from tags are stored in a database by the reader.
  • As compared to traditional barcodes QR  codes, RFID tag data can be read outside the line-of-sight.

RFID Features
  • RFID tag consists of an integrated circuit and an antenna.
  • The tag is covered by a protective material which also acts as a shield against various environment effects.
  • The tag may be passive or active.
  • Passive RFID tags are the most widely used.
  • Passive tags have to be powered by a reader inductively before they can transmit information, whereas active tags have their own power supply.
Working Principle :
  • Derived from Automatic identification and Data Capture (AIDC) technology.
  • AIDC performs object identification, object data collection and mapping of the collected data to computer systems with little or no human intervention.
  • AIDC uses radio waves to perform AIDC functions.
  • The main components of an RFID system include an RFID tag or smart label, an RFID reader, and an antenna. 



Application :
  • Inventory management
  • Asset tracking
  • Personal tracking
  • Controlling access to restricted areas
  • ID badging
  • Supply chain management
  • Counterfeit prevention (e.g. in the pharmaceutical industry)



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