Hydrophone

Details Hydrophone Hydrophone

1985-05-23

1988-07-05

Budd, Mark O.

Electrical generator or motor structure

Non-dynamoelectric

Piezoelectric elements and devices

310334, 310800, 310327, 367157, H01L 4108

Patent

active

047557087

ABSTRACT:
A miniature hydrophone is disclosed which contains a piezoelectric foil as a base element (2) with a linear arrangement of multiplicity of detector elements (10). In accordance with the invention, the electrodes (5) are arranged on a top surface (15) of one of the flat sides of a support (16) and are capacitively coupled by a bonding layer (6) to the base element (2). The detector elements (10) are associated with an amplifier (32) which, with equal length connecting leads (11, 26 and/or 12, 27), is fastened to a side face of the support (16). The electrical interconnection between the detector element (10) and the associated amplifier (32) employs a groove (24) through the corners of support 16. Additional such modules can form an assembly unit in a row arrangement of a size equal to that of the detector elements (10). Since all the connections (11, 26, 12, 27) to the amplifiers (32, 36) are very short and of equal length, the sensitivity of a system arrangement of such detector elements (10) and amplifiers (32 and/or 36) is homogeneous and very high.

REFERENCES:
patent: 4409510 (1983-10-01), Assenza et al.
patent: 4424465 (1984-01-01), Ohigashi et al.
patent: 4443730 (1984-04-01), Kitamura et al.
patent: 4473769 (1984-09-01), Nguyen
patent: 4517665 (1985-05-01), De Reggi et al.
patent: 4555953 (1985-12-01), Dario et al.
Monolithic Silicon-PVF.sub.2 Piezoelectric Arrays for Ultrasonic Imaging by R. G. Swartz et al., Stanford Electronics Laboratories, Stanford, Calif., 94305, presented at the 8th International Symposium on Acoustic Imaging, Key Biscayne, Fla., May 29-Jun. 2, 1978, 26 pages.
Y"Miniature Piezoelectric Polymer Ultrasonic Hydrophone Probes", Ultrasonics, P. A. Lewis, Sep. 1981, pp. 213-216.
J. Accoust. Soc. Am., vol. 61, Suppl. No. 1, Spring 1977, pp. 17 and 18.

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