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Acoustic source localization in anisotropic plates with "Z" shaped sensor clusters.

Shenxin Yin1, Zhiwen Cui1, Tribikram Kundu2

  • 1Dept. of Acoustics and Microwave Physics, College of Physics, Jilin University, Changchun 130012, China.

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Summary

A novel Z-shaped sensor cluster accurately localizes acoustic sources in plates using fewer sensors. This method requires minimal prior knowledge and works for both isotropic and anisotropic materials, improving source localization efficiency.

Keywords:
Acoustic emissionAcoustic source localizationAnisotropic plateL-shaped clustersTime difference of arrival

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Area of Science:

  • Acoustics
  • Sensor Technology
  • Materials Science

Background:

  • Acoustic source localization in plates is crucial for structural health monitoring.
  • Existing methods often require numerous sensors and prior knowledge of material properties.
  • Limitations exist in localizing sources in anisotropic materials.

Purpose of the Study:

  • To propose a new sensor cluster orientation for acoustic source localization.
  • To reduce the number of sensors needed for accurate localization.
  • To enable localization in both isotropic and anisotropic plates without prior material knowledge.

Main Methods:

  • Utilizing a Z-shaped sensor cluster configuration.
  • Employing time difference of arrival (TDOA) for localization.
  • Comparing a single Z-shaped cluster with two Z-shaped clusters for accuracy.

Main Results:

  • Accurate acoustic source localization is achievable with the proposed Z-shaped cluster.
  • The technique effectively localizes sources in anisotropic plates.
  • Two Z-shaped clusters (total 8 sensors) provide accurate localization, outperforming 9-sensor L-shaped configurations.

Conclusions:

  • The Z-shaped sensor cluster offers an efficient method for acoustic source localization.
  • This approach reduces sensor count and complexity compared to traditional techniques.
  • The proposed method enhances the accuracy and confidence of acoustic source prediction in plates.