What is RFID)

What is RFID)

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One day, Taylor, a staff member at the Sichuan Giant Panda Reserve, was shocked by the sound of a gun from the depths of the mountains. Then a red light flashing on the monitoring tracker told Taylor, A pandatv mother who just installed a neck tracker encountered a problem. You know, there is a cute baby panda beside mother pandatv. If her mother pandatv is hacked, the baby pandatv will not survive for a long time because she does not have milk. Taylor's worries are still happening. Pandatv's mother was injured by two hunters while pandatv was taken away by them.

When Ryan and his father appeared at the site, Taylor was unfortunately hit by the CAPTCHA ......

This is a scene depicted in the American movie "The Adventures of cats and bears". The neck-style tracker in the film is actually an RFID device that is made into practice.

Radio Frequency Identification technology is an automatic identification technology that emerged in 1990s. Radio Frequency Identification Technology is a use of radio frequency signal through spatial coupling (alternating magnetic field or electromagnetic field) the technology that realizes non-contact information transmission and achieves recognition through the transmitted information.

Radio Frequency Identification (RFID) is one of the common basic components of Iot.

In short, RFID is a micro-radio signal generator, which can send simple radio signals with varying quantities and different contents to inform it of its current status and position.

To give a simple example, when an RFID system installed in a chair is under pressure, the pressure measuring instrument will connect to the RFID circuit when it feels that the pressure has changed, after RFID is connected to the circuit, it knows that someone in the chair is sitting up, and sends a set of signals to the signal collector for receiving. Then, the signal collector sends the collected signals to the control center, at this time, the signal collector will send two groups of data, one for the table is sent by the RFID number XXXX, and the other for the RFID signal content.

In this way, the control center clearly realized that the RFID chair with the id xxxx was installed, and now someone is sitting on it, when the person sitting in the chair leaves the chair, RFID sends out another set number, the control center will know that the person sitting in the chair has left the seat.

 

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