A rfid localization method for mobile robots based on phase features

A mobile robot and positioning method technology, applied in positioning, instruments, computer components, etc., can solve the problems of large calculation load, real-time limitation, large directional antenna size, etc., and achieve small calculation load, small calculation amount, and anti- strong interference effect
CN108414972BActive Publication Date: 2020-05-19HUAZHONG UNIV OF SCI & TECH
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
HUAZHONG UNIV OF SCI & TECH
Publication Date
2020-05-19

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Abstract

The invention belongs to the field of wireless positioning, and particularly discloses a mobile robot RFID positioning method based on a phase characteristic. The method comprises the following stepsof S1, when an RFID reader-and-writer moves on a mobile robot, forming an RF loop with an RFID label which is mounted on an object, measuring phase information and signal wavelength information of theRFID RF loop by the RFID reader-and-writer; S2, converting periodical non-continuous phase information to continuous non-periodical phase information, and acquiring position information of an RFID reader-and-writer antenna; and S3, constructing an unwrapping phase-position model, introducing signal wavelength information, the continuous non-periodical phase information and position information ofthe antenna into an unwrapping phase-position model, calculating the position information of the RFID label relative to a mobile robot, thereby realizing positioning of the object. The mobile robot RFID positioning method based on the phase characteristic has advantages of high positioning accuracy, high interference resistance, low calculation amount, simple system, etc.
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Description

technical field

[0001] The invention belongs to the field of wireless positioning, and more particularly relates to an RFID positioning method for a mobile robot based on phase characteristics. Background technique

[0002] RFID (Radio Frequency Identification), that is, radio frequency identification technology, is a wireless communication technology for building the Internet of Things. Passive UHF RFID has been widely used due to its unique ID, low cost, long distance, and no need for batteries. warehouse management, etc. RFID-based positioning technology can greatly improve the efficiency of item management. In the past ten years, RFID-based indoor positioning systems and methods have been continuously proposed. Among them, signal strength (RSSI) and phase are the two most important radio frequency information in RFID positioning.

[0003] Due to the existence of environmental interference such as multipath effects, the attenuation of signal strength and the mapping rel...

Claims

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