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Displacement Estimation Using 3D-Printed RFID Arrays for Structural Health Monitoring.

Metin Pekgor1, Reza Arablouei2, Mostafa Nikzad1

  • 1Department of Mechanical and Product Design Engineering, Swinburne University of Technology, Hawthorn, VIC 3122, Australia.

Sensors (Basel, Switzerland)
|November 26, 2022
PubMed
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This study uses 3D printed passive Radio Frequency Identification (RFID) tags for structural health monitoring. The novel method detects displacements by estimating signal direction using RFID phase data.

Area of Science:

  • Engineering
  • Sensor Technology
  • Structural Health Monitoring

Background:

  • Radio Frequency Identification (RFID) tags are versatile wireless sensors.
  • Existing methods for structural health monitoring face limitations in cost and deployment.
  • Detecting structural displacements is crucial for assessing integrity.

Purpose of the Study:

  • To introduce a novel method for structural health monitoring using passive RFID tags.
  • To detect structural displacements by estimating the direction of arrival of backscattered signals.
  • To validate the proposed approach through real-world experiments.

Main Methods:

  • Embedding 3D printable passive RFID tags in uniform linear arrays.
  • Utilizing the Multiple Signal Classification (MUSIC) algorithm for direction of arrival estimation.
Keywords:
3D printingRFIDdirection of arrivalmultiple signal classificationstructural health monitoring

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  • Employing only the phase information of backscattered RFID signals.
  • Conducting experiments with a unipolar RFID reader antenna and both narrowband and wideband measurements.

    • Main Results:

    • Successful detection of displacements using the proposed RFID-based method.
    • Accurate estimation of the direction of arrival based on RFID signal phase.
    • Validation of the approach in real-world experimental settings.

    Conclusions:

    • Passive RFID tags offer a low-cost, wearable solution for structural health monitoring.
    • The proposed method effectively detects displacements by analyzing RFID signal phase.
    • This technique shows promise for non-destructive structural integrity assessment.