Radio Frequency Identification


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Radio Frequency Identification :

Radio Frequency Identification Presented By : PO LM Wijewthungaarachi PO KKIS Chanaka PO NDM Wijewardhana

Contents :

Contents Aim. Introduction. History of RFID. How RFID Works Component of RFID. Passive Tags. Active Tags. Comparison of Active and Passive tags. Uses of RFID. Benefits of Using RFID. Conclusion.


AIM Give brief Idea about RFID and its functions.


Introduction Radio-frequency identification (RFID) is an automatic identification method, relying on storing and remotely retrieving data using devices called RFID tags or transponders. RFID (radio frequency identification) is a technology that incorporates the use of electromagnetic or electrostatic coupling in the radio frequency (RF) portion of the electromagnetic spectrum to uniquely identify an object, animal, or person. An alternative to bar code. RFID is also called dedicated short range communication (DSRC).

History of RFID:

History of RFID Invented in 1948 by Harry Stockman. Initial application was during World War II-The United Kingdom used RFID devices to distinguish returning English airplanes from inbound German ones. RADAR was only able to signal the presence of a plane, not the kind of plane it was. Came into commercial use only in 1990s.

How Does RFID Woks:

How Does RFID Woks RFID uses Radio Frequency Identification Tags or a smart label which is a replacement for barcode. This tag talks to a networked system so it can track the items which the tag is embedded on. The system will get the information and use them for Processing.

Component of RFID:

Component of RFID Tags : An RFID tag is an object that can be stuck on or incorporated into a product, animal, or person for the purpose of identification using radio waves ( Chip + Antenna + Substrate ). Interrogator : Interrogator are used to read the tags & in certain cases even remotely writes to the tag ( Antenna + Reader ) . Middleware : Middleware is the needed interface between the existing company databases & information management software. Application Software : used to manage the collected data.

Passive RFID Tags:

Passive RFID Tags Tag contains an antenna, and a small chip that stores a small amount of data Tag can be programmed at manufacture or on installation Tag is powered by the high power electromagnetic field generated by the antennas – usually in doorways The field allows the chip/antenna to reflect back an extremely weak signal containing the data. Collision Detection – recognition of multiple tags in the read range – is employed to separately read the individual tags

Active RFID Tags:

Active RFID Tags Battery Powered tags Have much greater range – 100m Hold much more information – Kbytes Can integrate sensing technology Temperature, GPS Can signal at defined time Multiple tags can be recorded at once Used for higher value items Shipping containers Babies Electronic assets Life between 2 – 4 years.

Comparison of Active and Passive Tags.:

Comparison of Active and Passive Tags . Active Tags Passive Tags Power Source Internal to tag Energy transferred using RF from reader Tag Battery Yes NO Availability of power Continuous Only in field of reader Required signal strength to Tag Very Low Very High Range Up to 100 m Up to 3-5 m usually less Multi -Tag Reading 1000’s of tags recognized – up to 100mph Few hundred within 3m of reader Data Storage Up to 128Kb or read/write with sophisticated search and access 128 bytes of read/write

Advantages of RFID:

Advantages of RFID No line of sight required. Tags embedded anywhere. Higher data Capacity. Faster read rate 100 to 1000 tags per second

Uses Of RFID:

Uses Of RFID Animal Identification. Asset Management and Retails Sales. Product Tracking. IT Asset Tracking. Transportation and Logistics. Hospital Operating Room. Promotion Tracking. Libraries. Passport.

Benefits of Using RFID:

Benefits of Using RFID Reduce warehouse and distribution labor costs . Reduce point-of-sale labor costs Reduce inventory Improve forecasting and planning Reduce Theft. Reduce out-of stock conditions. Improve customer experience.

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