Acoustic sensor
US5361240A · kind A · utility
33Cited by
8References
13Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Jul 10, 1990 |
| Grant date | Nov 1, 1994 |
| Priority date | — |
| Expiry date | Jul 10, 2010 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S310/80
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A pressure compensated hydrophone assembly consists of a hollow mandrel that has an outer surface. The central portion of the outer surface of the mandrel defines a concavity. A flexible, resilient piezoelectric film is wrapped several times around the mandrel. The volume between the inner wrap of the film and the concavity on the outer surface of the mandrel serves as a pressure compensation chamber. The hydrophone is responsive to varying hydrodynamic pressure fields but is substantially inert to acceleration forces, localized impacts and variations in hydrostatic pressure.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.