5.13.2009

The Assignment One Question

There are 2 example for the business and for using the RFID.
Radio-frequency identification (RFID) is an automatic identification method, relying on storing and remotely retrieving data using devices called RFID tags or transponders.
An RFID tag is an object that can be applied to or incorporated into a product, animal, or person for the purpose of identification using radiowaves. Some tags can be read from several meters away and beyond the line of sight of the reader.
Most RFID tags contain at least two parts. One is an integrated circuit for storing and processing information, modulating and demodulating a (RF) signal, and other specialized functions. The second is an antenna for receiving and transmitting the signal. A technology called chipless RFID allows for discrete identification of tags without an integrated circuit, thereby allowing tags to be printed directly onto assets at a lower cost than traditional tags.
Wal-Mart is using a RFID label tag which works great with paper goods or goods with little metal/water content. Water and metal will either absorb or reflect/block the RF signal. You could use a special metal mount RFID tag or BAP (battery assisted passive) tag to track this type of goods, but the tag cost and size will increase quite a bit. On the positive side, these tags can be re-usable.

1 則留言:

  1. Hi Jessica, you could search for some examples of RFID use in Hong Kong, too.

    回覆刪除