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Numerical technique to reduce cross-coupling in acoustical arrays.

B Cugnet1, A C Hladky, J Assaad

  • 1Institut d'Electronique et de Microélectronique du Nord, UMR CNRS 8520, Département OAE, Université de Valenciennes et du Hainaut Cambrésis, France. boris.cugnet@isen.fr

Ultrasonics
|August 6, 2002
PubMed
Summary

Finite element method (FEM) optimizes piezoelectric transducer arrays by calculating potentials to minimize acoustic cross-coupling between elements. This method enhances directivity patterns for improved performance.

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Area of Science:

  • Acoustic Engineering
  • Materials Science
  • Electrical Engineering

Background:

  • Piezoelectric transducer arrays are crucial for various applications, but acoustic cross-coupling can degrade performance.
  • Optimizing the far-field directivity pattern of individual elements is essential for array functionality.

Purpose of the Study:

  • To investigate the applicability of the finite element method (FEM) for optimizing the directivity pattern of individual elements in a piezoelectric transducer array.
  • To develop and test an FEM algorithm for minimizing acoustic cross-coupling.

Main Methods:

  • The finite element method (FEM) was employed to calculate optimal electrical potentials.
  • The algorithm determined potentials for neighboring elements to minimize acoustic cross-coupling for a target element.

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  • A five-element array using PZT-5H material was used for feasibility testing.

    • Main Results:

    • The FEM algorithm successfully calculated electrical potentials to minimize acoustic cross-coupling.
    • The proposed method demonstrated feasibility in optimizing the directivity pattern of an individual element.
    • A reduction in acoustic cross-coupling was achieved through potential adjustments.

    Conclusions:

    • The finite element method is a viable approach for optimizing piezoelectric transducer array element directivity.
    • The developed FEM algorithm effectively minimizes acoustic cross-coupling, enhancing array performance.
    • This technique offers a pathway to improved control over individual element behavior in transducer arrays.