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Method for judging label displacement direction based on ultrahigh frequency RFID phase and SVM

An RFID tag and ultra-high frequency technology, applied in the field of displacement recognition, can solve the problems of electromagnetic signals being susceptible to environmental interference, low judgment accuracy, and low practicability, so as to accurately judge the direction of movement of RFID tags and avoid high-load problems. Data collection, the effect of reducing errors

Active Publication Date: 2020-05-19
EAST CHINA UNIV OF SCI & TECH +1
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Problems solved by technology

The existing technology adopts the method of adding other types of sensors for auxiliary judgment. The defect is that it is not practical due to the variability of the site environment; or the distance of the RFID electronic tag is used to solve the defect. Electromagnetic The signal is susceptible to environmental interference, resulting in low judgment accuracy

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  • Method for judging label displacement direction based on ultrahigh frequency RFID phase and SVM
  • Method for judging label displacement direction based on ultrahigh frequency RFID phase and SVM
  • Method for judging label displacement direction based on ultrahigh frequency RFID phase and SVM

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Embodiment Construction

[0026] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments.

[0027] The SVM algorithm, the solution formula of the optimal hyperplane and the judgment function involved in the present invention are all existing common knowledge, so the detailed description of the SVM algorithm and the corresponding formula will not be given.

[0028] Such as figure 1 As shown, the method for judging the tag displacement direction based on UHF RFID phase and SVM in this implementation, its sampling platform includes several RFID readers 20, RFID tags 10 to be positioned, and a host computer 30; wherein, each RFID reader 20 are provided with an RFID reader antenna 21, the RFID reader 20 is connected to the host computer 30; the RFID reader 20 transmits an ultra-high frequency radio frequency signal to the RFID tag 10 to be positioned, and receives the Describe the signal that the RFID tag 10 to be positioned returns, and ...

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Abstract

The invention discloses a method for judging a label displacement direction based on an ultrahigh frequency RFID phase and an SVM. The distance between a tag reader and an RFID electronic tag is judged through a signal phase difference generated by RFID in electromagnetic environment motion, data in a training environment are collected in advance and input into an SVM algorithm for training, and then real-time signal data are analyzed and judged. According to the method for judging the label displacement direction, the problem that electromagnetic signals are easily interfered by the environment in the prior art is solved, errors caused by interference data are reduced, and the technical effect of accurately judging the movement direction of the RFID label is achieved.

Description

technical field [0001] The invention belongs to the field of displacement identification, in particular to a method for judging the displacement direction of a tag based on UHF RFID phase and SVM. Background technique [0002] RFID (Radio Frequency Identification Technology) is an identification technology based on radio frequency. It is mainly composed of RFID readers, RFID reader antennas and RFID tags. It uses electromagnetic wave signals to transmit electronic information into the system through the read-write antenna. And query and change the data. RFID has been widely used in medical, automotive and other industries. In traditional industries, the production process pays great attention to cost issues and requires strict control of the production process. With the help of RFID, digital management can be realized. Location management is considered to be an important development direction of RFID, and RFID technology has great potential in realizing the flexibility, ma...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06K7/10G06K17/00G06K9/62
CPCG06K7/10158G06K7/10297G06K17/0022G06F18/2411Y02D30/70
Inventor 徐坚强胡注娇
Owner EAST CHINA UNIV OF SCI & TECH
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