Radio-frequency Identification uses electromagnetic fields to automatically identify and track tags attached to or embedded in objects. An RFID tag consists of a tiny radio transponder, a radio receiver and transmitter.
A passive RFID tag is powered by the RFID scanner so that it can transmit its signal; an active RFID tag must have its own battery to transmit its signal.
When we discuss the advantages & disadvantages of a technology, we must bear in mind what alternative (if any) technologies could be used so that we may make a comparison. RFID tags are often used in place of bar-codes.
- RFID tags are faster and easier to scan than a bar-codes as tag just needs to come close to the scanner, does not actually need “line-of-sight”
- Multiple RFID tags can be scanned simultaneously
- RFID tags are durable & reusable
- Access Control: Access discs for business premises or residential complexes & buildings
- Tags scanned at access points to open gates & doors
- Security: Often attached to high-price items in-store to prevent theft
- Tag activates alarm at the door unless removed from the article
- Library books: librarians can check books in and out quickly and accurately with RFID tags embedded in the spine of the books
- Parcel tracking: items can be tracked and the data can automatically be uploaded to a database system for point-to-point live-tracking
- Timing Systems: Used in sports races to time competitors
- Time is taken when crossing “mat” at start and finish lines (and points in between)
- Animal Chipping: A small microchip is inserted under the skin of the animal (pets, livestock, etc).
- The chip holds a unique ID number which can be scanned and looked up in an online database to find the contact details of the owner.
- Micro-chipped pets can be scanned at a vet or at an animal shelter.
Read more about this technology here: https://internetofthingsagenda.techtarget.com/definition/RFID-radio-frequency-identification