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Method and device for identifying mobile RFID tag

A technology of RFID tags and equipment, applied in the field of RFID identification, can solve the problem of insufficient accuracy of RFID tag identification

Active Publication Date: 2021-08-31
FUJIAN NEWLAND AUTO ID TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In order to solve the problem in the above-mentioned prior art that the identification accuracy rate of RFID tags in mobile is not high enough, the present invention provides a method and equipment for identifying mobile RFID tags. In the present invention, the tag information is acquired and recorded multiple times, which can effectively reduce the The impact caused by missing identification of RFID tags, and using the time decay function to construct a credibility scoring function based on tag information, comprehensively considering factors such as reading time, signal strength value, and reading times, the resulting credibility score can truly reflect The credibility of each piece of tag information, get the RFID tag credibility score, so as to realize the accurate identification of RFID tags

Method used

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  • Method and device for identifying mobile RFID tag
  • Method and device for identifying mobile RFID tag
  • Method and device for identifying mobile RFID tag

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0043] refer to figure 1 , a method for identifying a mobile RFID tag, comprising the steps of:

[0044] The reader acquires and records the tag information of several mobile RFID tags multiple times within the specified time (refer to figure 2), the tag information includes the identification information of the RFID tag (in this embodiment, the identification information is the electronic code of the RFID tag), the time when the RFID tag was read (in this embodiment, the read time is recorded in the form of a time stamp time), the number of times the RFID tag is read and the signal strength value of the RFID tag;

[0045] Constructing a credibility scoring function based on the label information by using a time decay function;

[0046] Input the tag information into the credibility scoring function to obtain the credibility score of each mobile RFID tag, and according to the identification information of the RFID tag corresponding to the maximum value of the credibility sc...

Embodiment 2

[0051] In this embodiment, construct the credibility scoring function as:

[0052]

[0053] Among them, m score Represents the credibility score of an RFID tag, N represents the total number of tag information corresponding to the RFID tag, T n Indicates the time difference between the read time and the end read time in the nth tag information of the RFID tag, Indicates the absolute value of the average signal strength in all tag information of the RFID tag, C n Indicates the number of read times in the nth tag information of the RFID tag, a and b are fixed parameters.

[0054] The function constructed in the present invention is an accumulative function, and the credibility score of the RFID tag is obtained by accumulating the credibility scores of all tag information of the RFID tag.

[0055] In that function:

[0056] 1. With other conditions unchanged, the closer the reading time of the tag information is to the end movement time (ie T n is smaller), its reliabili...

Embodiment 3

[0065] Further, a threshold is preset, if the i-th maximum value in the credibility scores of the several RFID tags exceeds the threshold (in this embodiment, there are n credibility scores, i=n / 2) , it indicates that there is strong interference, and the result obtained in Example 1 is not reliable enough, discard the result, and try to obtain and record the tag information again, so as to re-identify the mobile RFID tag currently closest to the reader. If the threshold is not exceeded, the identity of the mobile RFID tag currently closest to the reader is confirmed according to the identification information of the RFID tag corresponding to the maximum value of the credibility score.

[0066] The progress of this embodiment lies in: calculating the credibility scores of all RFID tags that can be read by the reader, and using this as a basis to judge whether there is a strong interference signal in the surrounding area, which can effectively avoid the occurrence of false detec...

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Abstract

The invention relates to a method for identifying mobile RFID tags. The method comprises the following steps that: acquiring and recording, by a reader, tag information of a plurality of mobile RFID tags for multiple times within appointed time; constructing a credibility scoring function based on the label information by using a time decay function; and inputting the tag information into a credibility scoring function to obtain a credibility score of each mobile RFID tag, and identifying the mobile RFID tag closest to the reader at present according to the credibility score. According to the method, the tag information is acquired and recorded for multiple times, the influence caused by missing identification of the RFID tag can be effectively reduced, the time attenuation function is utilized, the credibility scoring function based on the tag information is constructed, and factors such as the reading time,the signal strength value and the reading frequency are comprehensively considered; therefore, the obtained credibility score can reflect the credibility of each piece of label information practically, and the RFID label credibility score is obtained, so that accurate identification of the RFID label is realized.

Description

technical field [0001] The invention relates to a method and equipment for identifying mobile RFID tags, belonging to the field of RFID identification. Background technique [0002] RFID tags are widely used in the fields of production line management, warehouse management, logistics management, etc., as a data carrier to identify items: Usually, RFID tags (also known as radio frequency tags) are set on items in advance, and the relationship between RFID tags and items is established. Correspondence, and record the relevant information of the item; in the follow-up management, read the electronic code of the RFID tag through the reader, identify the RFID tag, and identify the item through the correspondence between the RFID tag and the item. In some application scenarios (such as sorting and handling), if the items are moving, the RFID tags will also move accordingly. If the items pass through the identification device (such as the gantry) set on the sorting carousel one by ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06K7/00
CPCG06K7/0008
Inventor 陈刚郭锋张雅玲
Owner FUJIAN NEWLAND AUTO ID TECH CO LTD
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