Radio frequency identification tag identifying method, device and system

Abstract

The embodiment of the invention discloses a radio frequency identification tag identifying method, device and system. The method comprises the steps of reading radio frequency identification tags in a first reading period, switching off a reading process, reading radio frequency identification tags in a second reading period, and determining the radio frequency identification tags are identified if the same radio frequency identification tag is read continuously in the first reading period and the second reading period. In addition, the switch-off time can be set according to conversation continuing time of the radio frequency identification tags to be identified. According to the method, the radio frequency identification tags are heated or lighted to shorten the conversation continuing time of the radio frequency identification tags, and accordingly the radio frequency identification tags can quickly power down. Furthermore, twice continuous reading in two continuous radio frequency identification reading periods can be achieved. Thus, serial-reading tags can be strictly filtered, and the reliability for filtering the serial-reading tags is improved.

Description

technical field [0001] The present invention relates to the field of radio frequency identification (Radio Frequency Identification, RFID) technology, in particular to an identification method, device and system for radio frequency identification tags. Background technique [0002] RFID technology is a communication technology that can identify specific targets and read and write related data through radio signals without establishing mechanical or optical contact between the identification system and specific targets. Commonly used are low frequency (125k ~ 134.2K), high frequency ( HF), Ultra High Frequency (UHF) and other implementations. Compared with high-frequency RFID, UHF RFID has the advantages of wider reading range, faster reading speed, lower tag cost, and smaller reader and tag antennas, so that objects can be directly identified, and it also has the advantages of Possibility to track goods from delivery to assembly line. However, UHF RF signals are often plag...

AI Technical Summary

Problems solved by technology

However, these existing methods all utilize parameters related to RF signals to perform the filtering operation, and parameters related to RF signals are also generally susceptible to multipath propagation, so these existing methods cannot reliably filter cross-read tags

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