Distributed ultrahigh-frequency RFID read-write equipment and a control method thereof

Abstract

The invention provides distributed ultrahigh frequency RFID (Radio Frequency Identification Device) read-write equipment, which is mainly characterized by comprising a host and a plurality of repeaters. The host controls the repeaters to work cooperatively through a control link; The host communicates with the repeater through a first communication link, and the repeater communicates with the electronic tag through a second communication link; Wherein the first communication link and the second communication link adopt different frequency bands; The host controls the repeaters within the required range to enter a working state one by one, and when one repeater works, the rest repeaters are controlled to be in a silent state. The repeater is used for frequency shift and signal amplificationbetween forward links of the first communication link and the second communication link, and frequency shift and signal amplification between reverse links of the second communication link and the first communication link.

Description

technical field [0001] The invention relates to the field of radio frequency identification, in particular to a method for realizing a distributed ultra-high frequency RFID read-write device. Background technique [0002] UHF RFID technology is a non-contact automatic identification technology realized by radio frequency communication. This technology is recognized as one of the major application technologies in the 21st century, and can be widely used in logistics storage, manufacturing, transportation and other fields. [0003] UHF RFID technology is limited by the transmission power and the sensitivity of electronic tags. Usually, the reading distance is about 5-30m. In the application field of large warehouses and parking lots, a large number of reading and writing devices need to be deployed to ensure full coverage; in addition, UHF RFID technology It is usually directional. In order to improve the reading rate, reading and writing devices need to be deployed at differ...

AI Technical Summary

Problems solved by technology

Intensive deployment requires the purchase of multiple read-write devices, which increases the cost of use. In addition, there is also the problem of cross-interference of radio frequency signals between read-write devices in dense deployment, which needs to be solved through frequency division and time division mechanisms, which greatly increases the complexity of the system. Reduced system reliability

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