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Generating an Adjustable Focused Field With an Annular Shape Using a Cylindrical Acoustic Transducer Array.

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Researchers developed a cylindrical acoustic transducer array that creates a controllable 3D circular ring sound field. This technology offers potential applications in ultrasound detection for circular sound field scanning.

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Area of Science:

Acoustics
Materials Science
Electrical Engineering

Background:

Acoustic transducer arrays are crucial for various applications, including medical imaging and non-destructive testing.
Controlling acoustic fields with high precision is essential for advanced applications.
Cylindrical arrays offer unique advantages for generating specific sound field geometries.

Purpose of the Study:

To design and demonstrate a cylindrical acoustic transducer array capable of generating an adjustable 3D annular focused sound field.
To investigate the relationship between element excitation, delay parameters, and the resulting acoustic field characteristics.
To explore the potential applications of this technology in ultrasound detection.

Main Methods:

Utilized Huygens' principle to calculate optimal delay parameters for individual piezoelectric elements.
Designed and fabricated a 64-element circular cylindrical acoustic transducer array.
Conducted simulations and experimental measurements to validate the acoustic field distribution.

Main Results:

The fabricated array successfully generated a controllable annular acoustic focused field.
Simulation and experimental results confirmed the ability to shape the sound field into a 3D circular ring.
Sound field intensity correlated with the number of excited elements, and focus positions followed calculated delay rules.

Conclusions:

The proposed circular cylindrical array effectively controls annular acoustic fields.
The demonstrated acoustic field control methods are promising for ultrasound detection applications requiring circular sound field scanning.