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A Reference Matching-Based Temperature Compensation Method for Ultrasonic Guided Wave Signals.

Geng Wang1, Yuhang Wang1,2, Hu Sun1

  • 1School of Aerospace Engineering, Xiamen University, Xiamen 361005, China.

Sensors (Basel, Switzerland)
|November 30, 2019
PubMed
Summary
This summary is machine-generated.

This study introduces a novel temperature compensation method for ultrasonic guided waves, crucial for accurate structural damage diagnosis. The technique effectively removes temperature-induced signal variations, enhancing monitoring reliability.

Keywords:
composite materialreference signal matchingstructural health monitoringtemperature compensationultrasonic guided wave

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Area of Science:

  • Structural Health Monitoring
  • Non-Destructive Testing
  • Acoustics

Background:

  • Ultrasonic guided waves are vital for structural damage diagnosis.
  • Environmental factors like temperature significantly impact monitoring accuracy.
  • Existing methods struggle to compensate for temperature variations.

Purpose of the Study:

  • To propose a reference matching-based temperature compensation method for ultrasonic guided wave signals.
  • To eliminate the influence of temperature on signal amplitude and phase.
  • To improve compensation performance through iterative residual signal compensation.

Main Methods:

  • Utilizing guided wave signals measured at various temperatures as references.
  • Establishing relationships between reference signal features and temperature.
  • Employing a Gabor function-based matching algorithm to link amplitude influence coefficients with temperature.
  • Reconstructing compensation signals via interpolation for phase and amplitude influence coefficients.

Main Results:

  • The proposed method effectively eliminates temperature effects on ultrasonic guided wave signals.
  • First-iteration compensation is effective for temperature ranges exceeding 7 °C.
  • Three iterations achieve compensation for temperature ranges exceeding 18 °C.
  • Iterative compensation of residual signals enhances overall performance.

Conclusions:

  • The reference matching-based temperature compensation method significantly improves the reliability of ultrasonic guided wave structural diagnosis.
  • The iterative approach enhances compensation accuracy across wider temperature fluctuations.
  • This technique offers a robust solution for real-world applications where environmental conditions vary.