11-10-2010, 03:46 PM
RFID-abstract.pdf (Size: 1.94 MB / Downloads: 77)
RFID(Radio-frequency Identification)
INTRODUCTION
Radio-frequency identification (RFID) is the use of an object (typically referred to as an RFID tag) applied to or incorporated into a product, animal, or person for the purpose of identification and tracking using radio waves. Some tags can be read from several meters away and beyond the line of sight of the reader.
RFID has many applications, for example, it is used in enterprise supply chain management to improve the efficiency of inventory tracking and management. Long checkout lines at the grocery store are one of the biggest complaints about the shopping experience. Soon, these lines could disappear when the ubiquitous Universal Product Code (UPC) bar code is replaced by smart labels. These labels are called radio frequency identification (RFID) tags. RFID tags are intelligent bar codes that can talk to a networked system to track every product that we put in our shopping cart.
Unlike ubiquitous (UPC) bar-code technology, RFID technology does not require contact or line of sight for communication. RFID data can be read through the human body, clothing and non-metallic materials. Imagine going to the grocery store, filling up our cart and walking right out the door. No longer we’ll have to wait as someone rings up each item in our cart one at a time. Instead, these RFID tags will communicate with an electronic reader that will detect every item in the cart and ring each up almost instantly. The reader will be connected to a large network that will send information of our products to the retailer and product manufacturers. Our bank will then be notified and the amount of the bill will be deducted from our account. No lines, no waiting.
Outside the realm of retail merchandise, RFID tags are tracking vehicles, airline passengers, Alzheimer's patients and pets. To better understand how RFID’s work let us take a look at the components and build of a basic RFID system.