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US 9,179,219 B2Granted
Widebeam acoustic transducer
AssigneeAirmar Technology Corporation
InventorKenneth D. Rolt
Life of this patent
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Abstract
An acoustic transducer for producing sonar waves features a piezoelectric structure with a radiating surface. A plurality of elements is attached to the radiating surface, and at least two of the plurality of elements have different acoustic properties. The acoustic transducer is designed for a wider beam angle for a thickness vibration mode while maintaining other desired vibration frequencies, maximum input power and low cost.
Claims12
An acoustic transducer for producing sonar waves, the acoustic transducer comprising:
- a piezoelectric structure with a radiating surface;
- and
- a plurality of elements attached to the radiating surface, the plurality of elements comprising at least two elements including an outer annular ring and an inner round disk within an inner perimeter of the ring, the ring and disk of differing acoustic properties and configured to permit penetration of acoustic waves therethrough, the piezoelectric structure and plurality of attached elements configured to produce an acoustic beam defined by one or more first order Bessel functions of the first kind.
Dependencies are inferred from the claim text.