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Recombination Dynamics in Thin-film Photovoltaic Materials via Time-resolved Microwave Conductivity

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Lamb Wave Probabilistic Damage Identification Based on the Exchanging-Element Time-Reversal Method.

Zeyu Shu¹, Jian He¹, Muping Hu¹

¹College of Aerospace and Civil Engineering, Harbin Engineering University, Harbin 150001, China.

Sensors (Basel, Switzerland)

|October 26, 2024

Summary

This study introduces a new probabilistic method for Lamb wave damage localization, reducing the need for extensive sensor data and baseline signals. The probabilistic exchanging-element time-reversal method (PEX-TRM) enhances damage identification efficiency.

Keywords:

Lamb waves correlation analysis damage location exchanging-element time-reversal method probabilistic damage imaging

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Area of Science:

Structural Health Monitoring
Non-Destructive Testing
Acoustic Wave Propagation

Background:

Baseline-free Lamb wave damage identification methods often require substantial sensor data.
Existing methods face challenges with damage wave packet extraction and efficiency.

Purpose of the Study:

To propose an efficient and accurate Lamb wave damage localization method.
To reduce reliance on baseline signals and minimize sensor data requirements.

Main Methods:

Development of the probabilistic exchanging-element time-reversal method (PEX-TRM).
Analysis of damage wave packet migration's influence on signal correlation.
Damage probability imaging utilizing structural symmetry for sparse sensing paths.

Main Results:

PEX-TRM achieves damage location with fewer excitation times.
The method effectively avoids difficulties in extracting damage wave packets.
Enhanced location accuracy, especially with sparse sensing paths.

Conclusions:

PEX-TRM significantly improves the efficiency of Lamb wave damage localization.
The proposed method shows strong potential for engineering applications in structural health monitoring.