Methods, systems and apparatus for measuring acoustic pressure
US7969823B2 · kind B2 · utility
Assignees
Inventor
Key dates
| Filing date | Nov 21, 2006 |
| Grant date | Jun 28, 2011 |
| Priority date | — |
| Expiry date | Sep 8, 2027 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01V1/38
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A hydrophone (10) for immersion in a liquid body defining a pressure is disclosed The hydrophone (10) includes a sensor (11) for providing an electrical signal indicative of the pressure; and a transducer (12) electrically connected to the sensor (11). The transducer (12) acts upon a fiber optic cable (15) so as to convert the electrical signal into a corresponding optical output signal for transmission within the fiber optic cable (15). The liquid body defines a depth-dependent static pressure and a dynamic pressure and the sensor (11) provides an electrical signal having a first component indicative of the static pressure and a second component indicative of the dynamic pressure. A filter (16) is electrically connected to the sensor (11) so as to receive (the electrical signal, filter out the first component, and output to the transducer (12) a uttered electrical signal indicative of substantially only the second component.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.