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What is RFID definition/concept/elaboration

Have you ever wondered how it is possible to manage the huge logistical warehouses that exist today? It is obvious that through labels with the printed data to be read or with barcodes scanned one by one, what gets complicated is when there are large amounts of articles. That’s why RFID was invented, as it allows data to be read wirelessly and remotely.

RFID acronyms correspond to Radio Frequency Identification and call one system of communicating wirelessly with a passive agent (which provides the information ) and other assets (which search and read). The transferred information corresponds to object identification data.

In the passive part, that of the object that transmits the information, we find a tag or label, which is the one that physically contains the information to be read. These elements do not actively emit, but are limited to responding to requests from RFID readers, although they have small antennas to be able to respond to requests.

About the use of barcodes, RFID provides some advantages:

No physical interaction with direct vision is required. While bar code reading requires the reader to be in front of the code, the “see”, RFID allows reading from a distance, regardless of the viewing angles.

As a result of the above, we can place the RFID tag anywhere, including inside the product, as it is not necessary to directly manipulate the tag for its reading, which is carried out at a distance.

The amount of data stored and the transmission power are superior to those stored in a small microchip, which we find in the RFID tag inserted into the object.

Tag data is updatable through a reprogramming of the chip. In the case of doing this through barcodes it becomes necessary to reprint an entirely new code.

Historically, the direct precedent of RFID technology is the passive listening microphones used in espionage tasks during the Cold War.

From there the technology evolved. Nowadays what is used is an electromagnetic field generated by the reader, which responds to another field created by the tag that contains the required information.

The possibilities of RFID technology go far beyond logistics, thanks to the RFID tag that can be implanted on objects of all types, such as clothes and even under the skin of an animal or a person , so we can add easily readable information to everyone. these objects.

An example of this is to implement all medical information regarding allergies, drug contraindications, treatments currently followed, medical history, a label under the skin, so that if any type of attack is suffered in a place other than the In our city or country, doctors know what to do just by reading the tag.

Naturally, this and other possibilities are well received by a part of society , which sees them as progress, while another sees them as a danger by allowing the theft of personal information more easily (just swiping an RFID reader).

It is noteworthy, however, that for this information certain protection measures may be adopted, even if every security measure may be violated.

RFID can also be used in applications that trigger an “event” on the reading device.

An example of this case would be a tourist application that reads separate tags in different parts of a city, so that when “find” one, the corresponding explanation is triggered on the reading device’s screen.

By installing the tags on the city‘s monuments, with a code for each one, and this code linked to a multimedia explanation, we can have an interactive and complete guide to the city to be used by tourists themselves.

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