Communications – electrical: acoustic wave systems and devices – Signal transducers – Underwater type
Patent
1988-06-28
1989-07-18
Steinberger, Brian S.
Communications, electrical: acoustic wave systems and devices
Signal transducers
Underwater type
367159, 367169, 310331, 310800, H04R 1700
Patent
active
048499463
ABSTRACT:
Piezoelectric transducer for the production of, for example, hydrophones, with the transducer including a plurality of sensitive coaxial elements interconnected so as to compensate for the effects of accelerations and deflections.
A transducer includes at least one pair of sensitive elements composed of sections of radially polarized coaxial piezoelectric cables having an opposing orientation, with an external armouring of one being connected with an internal armouring of the other, and vice versa. By increasing the number of parts of sensitive elements and selecting the relative disposition, it is possible to improve the immunity of the transducer to noise due to accelerations and deflections, regardless of the direction or the need to license a direction where the transducer is sensitive to such noise. A predetermined number of pairs of sensitive elements can be combined around a central column for accommodating connectors or cables.
To be applied, for example, to the production of hydrophones.
REFERENCES:
patent: 1874281 (1932-08-01), Gilbert
patent: 3651243 (1972-03-01), Horner et al.
patent: 3699237 (1972-10-01), Melia
patent: 3763464 (1973-10-01), Laurent
patent: 3798474 (1974-03-01), Cassand et al.
patent: 4245172 (1981-01-01), Shirley
patent: 4599483 (1986-07-01), Kuhn et al.
Institut Francais du Pe'trole
Steinberger Brian S.
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