RFID is the abbreviation of radio frequency identification. It directly inherits the concept of radar and develops a new technology of AIDC (automatic identification and data collection) – RFID technology. In order to achieve the goal of target recognition and data exchange, the technology transfers data between reader and RFID tag in non-contact two-way.
Compared with traditional bar code, magnetic card and IC card

RFID tags have advantages:Fast reading, Non contact, No wear, Not affected by the environment, Long life, Conflict prevention, Can process multiple cards at the same time, Unique information, Identification without human intervention, etc

How RFID tags work
The reader sends a certain frequency of RF signal through the transmitting antenna. When the RFID tag enters the working area of the transmitting antenna, it will generate the induced current and obtain the energy to be activated. RFID tags send their own coding and other information through the built-in transmitting antenna. The receiving antenna of the system receives the carrier signal sent from the RFID tags, which is transmitted to the reader through the antenna regulator. The reader demodulates and decodes the received signal, and then sends it to the background main system for relevant processing. The main system judges the legitimacy of the RFID according to the logic operation, aiming at different Set and make corresponding processing and control, send out command signal and control actuator action