1) What is Radio-frequency identification (RFID) ?

  • RFID is an abbreviation of Radio Frequency Identification.
  • RFID is an AIDC (Automatic Identification and Data Capture) Technology that uses radio-frequency waves to transfer data between a reader and an electronic(RFID)tag attached to an object,for the purpose of identification and tracking.
  • RFID is Fast, Reliable, and doesnot require Physical Sight or Contact between reader/scanner and the tagged item(RFIDTag).
  • RFID is widely used for Identification of men, material, vehicles, animals, products, baggage and books.
  • ID"Tags" that can:
    • Store unique ID information
    • Read and write data to the tag
    • Maintain historical information
  • An automatic way to collect information or data on:
    • Products
    • Places
    • Times
    • Transactions
  • RFID Tag
    • A memory device, usually eeprom,programmed with a series of bits/bytes.
  • Reader/Writer(Interrogator)
    • The unit powers the coil of wire known as the antenna, filters and powers them for transmission over distance.
  • Antenna
    • This is a coil of wound copper wire designed specifically to emit RFID signal.
  • Host computer/Interface/Software
    • The unit interfaces the reader to an intelligent device.

2)How It Works ?

  • Tag enters RF Field
  • RF signal powers tag
  • Tag transmits ID,plus data
  • Reader capture data
  • Reader send data to computer
  • Computer determines action

3)What are The unique features of RFID ?

1. Possibility of having a unique ID (unique in the world!)
  • No duplication, no copy
  • Applications: counterfeiting, security, sensitive data, guaranty

2. On the fly reading
  • No line of sight
  • Applications: reading on conveyors, access control (ski pass), ticketing, animal tracking

3. High speed data capture
  • Time to read the ID: about 10 ms
  • Applications: inventory, asset tracking, access control, process automation

4. Simultaneous multi-tag reading
  • Ability to read about 10 to 50 tags per second
  • Application: Supply chain, apparel, library, fast inventory

5. Writing capability
  • Ability to store information into the tag memory, with read / write password protection modes
  • Applications: Maintenance, loan management, biometry, asset management, delivery tour, money transaction

6. Durability of the ID
  • The lifetime of the tag depends only on the packaging quality
  • The packaging be very light: disposable tag, or highly rugged
  • Applications: Marking of critical components (wagon wheels), maintenance

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