Design of Mining Logistics UHF RFID Interrogator and Solution of Misreading Problem

To solve the problem that traditional RFID interrogator has no operating system and can only identify a short distance, this paper designed one UHF RFID interrogator based on S3C2440A controller and AS3992 UHF RFID chip. It uses the closed-loop network to control the output power, uses the antenna impedance match tuning network to reduce the reflected power. The maximum output power is 31d Bm. The identification distance is more than 10 meters. It solves the problem of misreading between the multi interrogators with the help of Linux operating system and host server. It has the advantages of long identification distance, high stability and no misreading. So it is more suitable for using in the mining logistics. It reduces the logistics cost and improves the logistics accuracy.