Hydrophone and process for manufacturing it
US5838637A · kind A · utility
Assignees
Inventors
Key dates
| Filing date | Apr 29, 1997 |
| Grant date | Nov 17, 1998 |
| Priority date | — |
| Expiry date | Apr 29, 2017 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01H11/08
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
The hydrophone according to the invention comprises at least one detection unit (1) comprising a casing made up of two cups (2a, 2b) resting on each other by a peripheral rim (3), each one of them being provided with a flexible central part, and a sensitive element (4) associated with electrodes, that is fastened to the central part of the cups, on the outer face thereof, a hollowed flat centering element (6) made of a deformable material, into which at least one casing is fitted, intended to be inserted into a tube (9) along an axial plane thereof, this centering element being provided for example with an inner slot (8) for fitting in the peripheral rim of the two cups (2a, 2b) of the casing, and a sealed protective coating (11) sheathing detection unit (1), and a part of the inner face of tube (9). Once the centering element is introduced in the tube, the substance forming the coating is injected into a thin space provided around the centering element by a two-legged moulding piece (13a, 13b) that is inserted into the tube. The hydrophone can be used in geophysical prospecting or subsea listening for example.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.