Pinwheel transducer array

Details Pinwheel transducer array Pinwheel transducer array

1998-05-21

2000-08-01

Pihulic, Daniel T.

Communications, electrical: acoustic wave systems and devices

Signal transducers

Underwater type

367 91, B01S 1500

Patent

active

060976713

ABSTRACT:
An acoustic transducer array in which the transducer elements project a plurality of acoustic beams which are not coplanar. In a first embodiment, a cylindrical transducer array housing has each of four transducer elements skewed at an angle relative to the longitudinal axis of the housing. Each acoustic beam formed by the array lies in a unique plane (e.g., in a "pinwheel" configuration), thereby effectively eliminating overlap of the beams throughout the entire profiling range of the array. In another aspect of the invention, acoustic damping material is incorporated throughout selected portions of the transducer housing to mitigate the effects of echoes and undesirable acoustic propagation within the array.

REFERENCES:
patent: 5228008 (1993-07-01), Burhanpurkar
patent: 5572487 (1996-11-01), Tims
Kino, Gordon S. (1987) Acoustic waves. Prentice-Hall, Inc. 2:144-150.
Panametrics Transducers (1997) AWS D1.1 Code, OP Angle Beam Transducers & Wedges & AWS Snail Wedges. 4 pages.
Sperry Marine (1995) SRD 421/S 2-Axis Doppler Speed Log. A Speed Log Unequaled in the Industry. 4 pages.

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