Line array transducer assembly

Details Line array transducer assembly Line array transducer assembly

1986-03-17

1988-03-22

Jordan, Charles T.

Communications, electrical: acoustic wave systems and devices

Seismic prospecting

Offshore prospecting

367154, 367162, 367166, 1741015, G01V 138

Patent

active

047333790

ABSTRACT:
A flexible line array transducer assembly for detecting underwater acoustical signals. The assembly includes an array of spaced-apart piezoelectric elements arranged generally in a line and selected to have low cross-coupling characteristics, low sensitivity to incoherent mechanical perturbations in the directions longitudinal and lateral to the axis of the array, and high sensitivity to coherent mechanical perturbations such as acoustical signals. The elements are polarized in a direction generally transverse to the array and each include opposing surface areas which are generally parallel with the linear axis of the array. Electrodes are disposed on the opposing surface areas of the elements and are coupled to conductors which carry signals produced by the piezoelectric elements when the elements are stressed by acoustical signals. A porous, open-cell material is disposed about the piezoelectric elements as an encasement to maintain the elements in place and mechanically isolate the elements. An outer, water-tight jacket encloses the open cell material and holds a fill fluid carried within the open-cell material. An electrically conductive flexible sleeve may be placed either about the open-cell material or about the outer jacket to shield the piezoelectric elements from electromagnetic waves.

REFERENCES:
patent: Re32123 (1986-04-01), Knight
patent: 3286227 (1966-11-01), Aldrich
patent: 3346838 (1967-10-01), Johnson et al.
patent: 3359537 (1967-12-01), Geil et al.
patent: 3603921 (1971-09-01), Dreisbach
patent: 3659258 (1972-04-01), Abbott
patent: 4035049 (1977-07-01), McKee
patent: 4160229 (1979-07-01), McGough
patent: 4300218 (1981-11-01), Kruka et al.
patent: 4636998 (1987-01-01), Greene et al.

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