Communications – electrical: acoustic wave systems and devices – Signal transducers – Underwater type
Patent
1987-11-13
1989-01-24
Steinberger, Brian S.
Communications, electrical: acoustic wave systems and devices
Signal transducers
Underwater type
367181, 367 19, 367 20, 181112, 181122, 73304C, 73649, 33 1PT, 33366, 340689, G01V 138, G01F 2326, H04R 102
Patent
active
048005428
ABSTRACT:
A sensor for resolving the left-right ambiguity encountered in horizontal line hydrophone arrays consists of an orthogonal pair of dipole hydrophones, a monopole hydrophone, and a tilt sensor, the tilt sensor connecting the dipole hydrophones so as to provide a single dipole hydrophone which is always oriented horizontally. The tilt sensor consists of two variable capacitors made from hollow cylinders of high permittivity dielectric material, partially filled with a quantity of liquid mercury which forms the variable inner electrodes of the capacitors. The outer electrodes of the capacitors, on the outside of the cylinders, having a sinusoidally-shaped perimeter and being oriented at right angles to each other, are connected to the crossed dipoles in order to provide the required horizontal dipole hydrophone.
REFERENCES:
patent: 4078223 (1978-03-01), Strange
patent: 4574491 (1986-03-01), Vining
patent: 4624140 (1986-11-01), Ekchian et al.
patent: 4641434 (1987-02-01), Engler
Franklin J. Barrie
McMahon Garfield W.
Her Majesty the Queen in right of Canada as represented by the
Steinberger Brian S.
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