RFID multi-label read-write identification method and device based on multiple channels

Abstract

The invention discloses an RFID multi-label read-write identification method and device based on multiple channels. The label read-write method comprises the steps that a plurality of initial communication channels are set in advance, radio frequency trigger signals are sent out and comprise the number of the communication channels and label read-write state information of all communication channels, received reflection carrier signals are decoded, at least one set of label feedback data in at least one communication channel are obtained, when label response information of one set of label feedback data meets a preset recognition condition, product electronic code information corresponding to the set of label feedback data is read, and label recognition information related to the product electronic code information is sent out. According to the method and device, accuracy of label identification and identification efficiency are improved.

Description

technical field [0001] The invention relates to radio frequency identification technology, in particular to a multi-channel-based RFID multi-label reading and writing identification method and device. Background technique [0002] RFID (Radio Frequency Identification, radio frequency identification) technology, also known as electronic tag technology, is a non-contact automatic identification technology. Its basic working principle is to use radio frequency signals and inductive or electromagnetic space coupling transmission characteristics to realize the Automatic recognition of objects. The RFID system is mainly composed of readers, electronic tags and corresponding computer systems. [0003] In the second-generation RFID technology standard, electronic tags are divided into three categories: passive electronic tags, active electronic tags that cannot directly communicate with each other, and active electronic tags that can directly communicate with each other. Consideri...

AI Technical Summary

Problems solved by technology

[0006] (1) In the case of a large number of tags, the anti-collision effect is not good

When the number of tags caught in collision is large, the anti-collision process is longer, and the probability of multiple tags responding at the same time increases

[0007] (2) The technology itself has the problem of missed reading. When a tag collides, it is not correctly read

In the case of a large number of tags, the tag may not be correctly identified for a long time, and the system will misjudge that it is not in the identification area

[0008] (3) The signaling process of this technology is complex and time-consuming. The reader and the tag can only recognize the EPC (Electronic Product Code, product electronic code) information of the tag through multiple command interactions

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