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Miniature multimode monolithic flextensional transducers.

Anne-Christine Hladky-Hennion1, A Erman Uzgur, Douglas C Markley

  • 1Institut d'Electronique, de Microelectronique et de Nanotechnologie, UMR 8520 CNRS, 59046 Lille Cedex, France. anne-christine.hladky@isen.fr

IEEE Transactions on Ultrasonics, Ferroelectrics, and Frequency Control
|November 21, 2007
PubMed
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A new family of small, low-cost flextensional transducers was developed for underwater and biomedical uses. Finite-element analysis optimized these miniature devices for broad bandwidth and controlled acoustic patterns, enabling versatile applications.

Area of Science:

  • Acoustic Engineering
  • Materials Science
  • Biomedical Engineering

Background:

  • Flextensional transducers are crucial for sonar, exploration, and medical imaging, operating typically between 1-100 kHz.
  • Existing designs are often large and costly, limiting their widespread adoption.
  • There is a need for miniaturized, cost-effective transducers with enhanced performance characteristics.

Purpose of the Study:

  • To develop a novel family of small, low-cost flextensional transducers.
  • To optimize these transducers for broad bandwidth and controlled acoustic directivity.
  • To explore manufacturing techniques for high-volume, low-cost production.

Main Methods:

  • Fabrication of miniaturized flextensional transducers with active shells.

Related Experiment Videos

  • Extensive use of finite-element analysis (FEA) for design optimization.
  • Investigation of various transducer topologies, cross-sections, and symmetries.
  • Exploration of ceramic and metal extrusion processes for manufacturing.

    • Main Results:

    • Developed miniaturized transducers with resonance frequencies spanning from below 10 kHz to above 1 MHz.
    • Achieved broad bandwidth for both transmitting and receiving capabilities.
    • Demonstrated control over vibration modes and acoustic radiation/receive patterns.
    • Identified key design parameters influencing performance, including symmetry, electrode geometry, and driving conditions.

    Conclusions:

    • The new family of small, multimode flextensional transducers offers a cost-effective solution for diverse applications.
    • FEA is a powerful tool for optimizing miniaturized transducer designs.
    • The developed transducers provide a balance of small size, low cost, and controlled acoustic performance.