RFID tag principle

　　RFID tag principle

　　RFID radio frequency identification is a non-contact automatic identification technology. It automatically identifies target objects and obtains relevant data through radio frequency signals. The identification work does not require manual intervention and can work in various harsh environments. RFID technology can identify high-speed moving objects and identify multiple electronic tags at the same time, which is fast and convenient to operate.

　　Classification of RFID tags

　　1. Active, passive, semi-active and semi-passive tags, etc.; 2. According to the different frequencies, it can be divided into low frequency, high frequency, ultra-high frequency and microwave electronic tags; 3. According to the different packaging forms, it can be divided into Credit card, linear, paper, glass tube, round and special-purpose special-shaped labels, etc.

　　The principle of RFID tags

　　After the RFID tag enters the magnetic field, it receives the radio frequency signal sent by the reader, and transmits the product information (Tag, passive or passive tag) stored in the chip with the energy obtained by the induced current, or actively sends a signal of a certain frequency ( Tag, active or active tag); the reader reads the information and decodes it, and sends it to the central information system for data processing.

　　Composition of RFID tags

　　RFID tags are mainly composed of the following three: RFID chip: including logic control unit, memory and transceiver, decoding, decryption and error checking and other computing functions; antenna: used to receive radio frequency data sent by the reader or transmit out Its own identification data; power source: active, provided by the power supply attached to the tag; passive, provided by the radio waves sent by the reader.

　　RFID tags are mainly composed of the following three: RFID chip: including logic control unit, memory and transceiver, decoding, decryption and error checking and other computing functions; antenna: used to receive radio frequency data sent by the reader or transmit out Its own identification data; power source: active, provided by the power supply attached to the tag; passive, provided by the radio waves sent by the reader.

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