What Is RFID Technology?

The radio signal recognizes a specific target and reads and writes related data, without the need to establish mechanical or optical contact between the recognition system and the specific target.

The radio signal is an electromagnetic field tuned to a radio frequency to transmit data from the tag attached to the item to automatically identify and track the item. Some tags can obtain energy from the electromagnetic field emitted by the recognizer during identification, and do not require a battery; some tags have their own power source and can actively emit radio waves (electromagnetic fields adjusted to radio frequencies). The label contains information stored electronically and can be identified within a few meters. Unlike the barcode, the radio frequency tag does not need to be in the line of sight of the recognizer, and can also be embedded in the tracked object.

Expansion information:

Many industries have used radio frequency identification technology. By attaching the label to a car in production, the factory can easily track the progress of the car on the production line. The warehouse can track the location of medicines. Radio frequency tags can also be attached to livestock and pets to facilitate the positive identification of livestock and pets (to prevent multiple livestock from using the same identity). Radio frequency identification cards allow employees to enter locked parts of buildings, and radio frequency transponders on cars can also be used to collect fees for toll roads and parking lots.

Some radio frequency tags are attached to clothing, personal belongings, and even implanted in the human body. Since this technology may read personal information without my permission, this technology also has the potential to infringe on personal privacy.