An electronic tag positioning method and an electronic tag positioning device

Abstract

The invention discloses an electronic label positioning method and an electronic label positioning device. The electronic label positioning method includes the following steps: a positioning device takes two label reader-writers randomly from N label reader-writers in a predetermined area range as a combination, thereby obtaining C<N><2> combinations, initial free coordinates of a target electronic label are determined through a circle center line positioning method, an error circle is determined according to the initial free coordinates of the target electronic label, target reference electronic labels are searched in an area covered by the error circle, an area with the most target reference electronic labels is determined as the area where the target electronic label is, thereby realizing positioning of a specific position of the target electronic label, and in addition, and after smoothing is performed on distance information of the target electronic label fed back by the N label reader-writers in a predetermined period of time, instantaneous signal distance of the target electronic label relative to the N label reader-writers is determined, thereby effectively improving positioning accuracy of the electronic label.

Description

technical field [0001] The invention relates to the field of electronic tags, in particular to an electronic tag positioning method and an electronic tag positioning device. Background technique [0002] Radio Frequency Identification (RFID, Radio Frequency Identification) electronic tags are based on RFID technology and can play the role of identification, item tracking, and information collection. [0003] At present, RFID electronic tags have been widely used in the Internet of Things, and it is becoming more and more important to realize the physical positioning of the target by locating the RFID tags. [0004] The commonly used RFID electronic tag positioning method is to transmit radio frequency signals of different frequencies by the tag reader, and the tag reader receives the attenuation degree of the radio frequency signal reflected by the RFID electronic tag to measure the relationship between the RFID electronic tag and the tag reader. The distance is used to det...

AI Technical Summary

Problems solved by technology

[0005] However, the above-mentioned RFID electronic tag positioning method can only identify the distance between the RFID electronic tag and the reader, but cannot identify the specific location of the RFID electronic tag, and, because different environments will affect the attenuation rate of the radio frequency signal, for example, obstacles in the environment It will cause the radio frequency signal to reflect, refract or absorb to different degrees according to the material of the obstacle, resulting in a nonlinear signal strength attenuation. Therefore, the error of the result obtained by the above RFID electronic tag positioning method is relatively large

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