source：Industry News Popular：rfid fpc tag release time：2021-11-09 10:59:00 Article author：sznbone
The working principle of RFID automatic identification
The system composed of RFID and short-range communication equipment mainly includes two parts: smart RFID, RFID read-write unit (Read-Write Units, RWU). The wireless communication between the read-write device RWU and RFID realizes the communication between the information management system and RFID. Information exchange.
The read-write device RWU is an RFID read-write controller, which is composed of a microprocessor, a security module, a microwave communication controller and communication interfaces such as RS232, 485, TCP/IP, etc. It uses short-range communication protocols and microwave wireless transmission methods to realize RWU For the purpose of safe and reliable information exchange with RFID, RWU connects to the host computer through RS232, 485, WIFI, GPRS, TCP/IP, etc., receives control commands and data from the host computer and returns data.
RFID is a mobile device with microwave communication function and information processing and storage functions. RFID built-in a small real-time task system to complete the internal memory, I/O, power supply, communication protocol, key, algorithm, command protocol processing and other functions of the RFID.
The core of the wireless communication protocol adopted by the short-range communication technology is the cell segmentation formed by the coverage of low-power microwave antennas, and the time division multiple access and synchronous communication mechanism based on the HDLC protocol are adopted to realize RWU- by designing corresponding processing and control software. Two-way data transmission and information exchange between RFID.
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