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Virtual reference tag-based RFID (Radio Frequency Identification) positioning method and system

A positioning method and tag technology, which are applied in the field of positioning methods and systems based on RFID tag antennas, can solve problems such as multipath interference and discount of positioning effect between signals, and achieve the effect of improving accuracy

Active Publication Date: 2018-04-13
SOUTHEAST UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Improper layout will cause hesitation. Factors such as multipath interference and interference between signals will greatly reduce the positioning effect

Method used

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  • Virtual reference tag-based RFID (Radio Frequency Identification) positioning method and system
  • Virtual reference tag-based RFID (Radio Frequency Identification) positioning method and system
  • Virtual reference tag-based RFID (Radio Frequency Identification) positioning method and system

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Embodiment Construction

[0051] The preferred embodiments of the present invention will be described below in conjunction with the accompanying drawings. It should be understood that the preferred embodiments described here are only used to illustrate and explain the present invention, and are not intended to limit the present invention.

[0052] figure 1 According to a kind of RFID positioning method of the present invention, it is characterized in that, at first set up label fingerprint space, utilize described label fingerprint space to locate the label to be positioned therein then:

[0053] Among them, the steps of establishing the tag fingerprint space include:

[0054] Step A1, arranging a set of tag antennas and a set of reader antennas in the space to be positioned;

[0055] Step A2, reading and storing the signal strength and phase information of the tag antenna through the reader antenna;

[0056] Step A3, correcting errors in the signal strength and phase information to obtain a feature ...

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Abstract

The invention relates to a virtual reference tag-based RFID (Radio Frequency Identification) positioning method and system. The system includes a set of tag antennas, a set of reader antennas, a set of tags to be positioned, and a processor. According to the virtual reference tag-based RFID (Radio Frequency Identification) positioning method and system of the present invention, a tag fingerprint space is established according to the signal strength and phases of the tag antennas; and the tags to be positioned in the tag fingerprint space are positioned through using the tag fingerprint space.Since a dual-attribute interpolation method is adopted, phase information is considered on the basis of the traditional signal strength dimension, and interpolation is performed on the parameters of the two dimensions, namely, signal strength and phases, so that a virtual reference tag is additionally adopted; and therefore, the accuracy of the method and system of the present invention is higherthan that of a technique that performs interpolation on a signal feature attribute to obtain a virtual tag, and the number of tags is not required to be increased, and errors introduced by interference between tags can be effectively avoided, and a positioning effect is more accurate.

Description

technical field [0001] The present invention relates to wireless positioning technology, in particular to a positioning method and system based on an RFID (Radio Frequency Identification, Radio Frequency Identification) tag antenna. Background technique [0002] RFID is an automatic identification technology, which identifies tags through wireless signals and completes reading and writing of relevant data. Since RFID technology has the advantages of non-line-of-sight, non-contact, low cost, mature technology and high positioning accuracy, it has been widely used in logistics and supply management, manufacturing and assembly, port container management, mail express, library management, Medical care, road pricing, access control, etc. [0003] At present, it has become a new research focus in RFID technology to apply RFID technology to the positioning system and gradually improve the accuracy of the positioning system. [0004] However, the current RFID positioning technolog...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01S5/02G06K17/00
CPCG01S5/0257G06K17/00
Inventor 莫凌飞李晨阳张东恺
Owner SOUTHEAST UNIV
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