Tilt compensation for acoustic transducing system

Details Tilt compensation for acoustic transducing system Tilt compensation for acoustic transducing system

1978-08-03

1979-12-18

Farley, Richard A.

Communications, electrical: acoustic wave systems and devices

Receiver circuitry

367121, G01S 380

Patent

active

041796829

ABSTRACT:
A tilt compensated transducer array is provided with omni-directional transducers, compensated bi-directional transducers, and a processor which forms omni and bi-directional beams that are combined to cancel image lobes to give the array a uni-directional characteristic in which but a single, steerable main lobe is formed over a board range of steering angles. When the elements are located along a flexible line about which they naturally twist, a pair of orthogonally oriented bi-directional transducers is tilt or twist compensated to make image lobe cancellation possible. This is done by a compensator at each pair of bi-directional transducers which modifies their outputs in accordance with the deflection angle from the local vertical so as to obtain an output signal substantially the same as would be obtained by a single, properly oriented bi-directional transducer. Additionally, the use of a tilt compensated element permits discrimination of long range targets from short range targets.

REFERENCES:
patent: 3178679 (1965-04-01), Wilkinson
patent: 3870989 (1975-03-01), Mallet

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