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rfid technology

Principles of operation of an RFID System

On the object to be identified is fixed a label (tag) containing a microchip which is equipped with an internal memory where the information relating to the object can be stored. When the antenna connected to the controller approaches the tag, it activates it using a magnetic field that it generates and reads the stored information, which are then transmitted to the central processing system. The tags are divided into "active" (when emitting electromagnetic waves) and "passive" (when remaining pending the stimulation by an external electromagnetic field); in particular, the passive tags used by us have a firing frequency in the UHF band (between 869 and 915 mhz).

RFID System components

Systems using this technology are typically made up of the following components: ‚Äč
  • tags also known as "RFID labels"; they are the objects that contain information and are characterized by the presence of a microchip
  • antenna to communicate with the tags and the controller
  • controller to manage the radio communications and act as an interface with the outside world; it can be integrated into the computer or in the antenna
  • computer (handheld, portable or fixed) to process, store and display information that can be later sent to a central system to be integrated in the company management system.
To this basic structure other "optional" components can be added as a part of the technological infrastructure such as cabling in industrial environments, the possible wireless coverage of the warehouses and spaces used for storage, the achievements of specific data storage facilities, etc.

Benefits of RFID technology

  • No contact needed between the detection system and rfid tags - it eliminates the problems arising from wear and allows, in particular, a rapid and secure reading
  • Performance is not affected by environmental factors (dust, mud, grease, noise) - the label can be read even if covered by external agents
  • Read the labels automatically on the production lines - human intervention is not necessary, thus limiting the risk of error and the operating costs
  • Simultaneous reading of multiple tags - it guarantees reduced times and great reading speed, while maintaining high standards of safety and reliability
  • Possibility of storing and modifying information in the labels - each label can contain a variable number of data according to the type of chip used
  • Absence of moving parts and maintenance both for labels and for readers - it ensures greater reliability and reduces maintenance costs