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Updated: Oct 22, 2025

Scattering And Absorption of Light in Planetary Regoliths

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Published on: July 1, 2019

Plate Waves Scattering Analysis and Active Damage Detection.

¹Department of Electronic Engineering, National United University, 2 Lien Da, Nan-Shih Li, Miaoli 36063, Taiwan.

Sensors (Basel, Switzerland)

|August 28, 2021

Summary

This study uses plate waves to detect circular holes and cracks in aluminum plates. Wavelet transform and a simplex algorithm accurately locate damage by analyzing scattered wave signals.

Keywords:

plate waves simplex algorithm time-of-flight difference wavelet transform

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Data Acquisition Protocol for Determining Embedded Sensitivity Functions

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Published on: April 20, 2016

Area of Science:

Materials Science
Non-destructive Testing
Acoustic Wave Propagation

Background:

Plate waves offer a promising method for structural health monitoring.
Detecting and locating damage like cracks and holes in plates is crucial for safety.

Purpose of the Study:

To investigate and evaluate plate wave technology for detecting circular holes and cracks in plates.
To develop an accurate method for locating and sizing plate damage using wave signals.

Main Methods:

Utilized piezoelectric ceramic discs as actuators and sensors on an aluminum alloy plate.
Analyzed antisymmetric plate wave signals in the time-frequency domain using wavelet transform.
Employed a simplex algorithm-based optimization program for inverse damage location calculation.

Main Results:

Successfully identified damage location and frequency spectrum characteristics through time-of-flight difference and scattered wave analysis.
Developed a damage location objective function with a unique global minimum, ensuring accurate calculations.
Experimental results demonstrated good performance in damage detection and localization.

Conclusions:

Plate wave analysis, combined with signal processing and optimization algorithms, is effective for detecting and locating plate damage.
Scattered plate wave spectral characteristics correlate with damage type, size, and propagation parameters.
Further numerical analysis is recommended to complement experimental findings for comprehensive damage characterization.