How RFID technology works!RFID factory

　　How RFID technology works

　　The complete RFID system consists of three parts: a reader, an electronic tag, and a data management system. The basic working principle of RFID technology is actually not complicated: after the tag enters the reader, it receives the radio frequency signal sent by the reader, and uses the energy obtained by the induced current to send out the product information stored in the chip (Passive Tag, passive tag or passive tag). Tag), or the tag actively sends a signal of a certain frequency (Active Tag, active tag or active tag). After the reader reads and decodes the information, it is sent to the central information system for relevant data processing.

　　A complete RFID system is composed of a reader and an electronic tag, which is the so-called transponder and application software system. The working principle is that the reader emits radio wave energy of a specific frequency to The internal data is sent out by the drive circuit. At this time, the Reader receives and interprets the data in sequence and sends them to the application program for corresponding processing. [4]

　　From the perspective of the communication and energy sensing methods between the RFID card reader and the electronic tag, it can be roughly divided into two types: inductive coupling and backscatter coupling. Basic low frequency RFID mostly adopts the first method, while higher frequency mostly adopts the second method. [4]

　　The reader can be a read or read/write device depending on the structure and technology used, and it is the center of RFID system information control and processing. The reader is usually composed of a coupling module, a transceiver module, a control module and an interface unit. The reader and the tag generally adopt a half-duplex communication mode for information exchange, and the reader provides energy and timing to the passive tag through coupling. In practical applications, management functions such as the collection, processing and remote transmission of object identification information can be further realized through Ethernet or WLAN. [4]

　　The complete RFID system is composed of three parts: a reader, an electronic tag, and a data management system.

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