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Tag-Array-Based UHF Passive RFID Tag Attitude Identification of Tracking Methods.

Honggang Wang¹, Sicheng Li¹, Yurun Zhou¹

¹College of Communication and Information Engineering, Xi'an University of Posts and Telecommunications, Xi'an 710121, China.

Sensors (Basel, Switzerland)

|October 16, 2024

Summary

This study introduces a novel ultra-high frequency passive RFID method for object attitude sensing. The dual-tag array strategy enhances spatial freedom and accuracy, improving both localization and attitude angle determination.

Keywords:

UHF RFID attitude identification coupled model rotation angle tag array

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Area of Science:

Robotics and Automation
Wireless Sensing Technologies
Object Recognition and Tracking

Background:

Accurate object attitude information is crucial for localization and description.
Existing methods may lack sufficient spatial freedom or struggle with phase ambiguity.

Purpose of the Study:

To propose and validate a novel object attitude sensing method using ultra-high frequency (UHF) passive RFID.
To enhance spatial freedom and eliminate phase ambiguity in object attitude determination.

Main Methods:

Utilized a dual-tag array strategy with UHF passive RFID.
Developed a coupling model to compensate for inter-tag interference.
Integrated object rotation angle influence into the attitude recognition model.
Employed polynomial regression for phase measurement error reduction.

Main Results:

Achieved an average object positioning error of 12.3 cm.
Attained an average attitude angle recognition error of 8.28°.
Demonstrated significant improvement in recognition accuracy for both localization and attitude.

Conclusions:

The proposed dual-tag RFID method effectively improves object attitude sensing accuracy.
Compensating for inter-tag coupling and rotation angle is vital for precise measurements.
The method is suitable for practical applications requiring accurate attitude recognition.