Underwater acoustic beacon location system
US9829565B1 · kind B1 · utility
Assignee
Inventor
Key dates
| Filing date | Dec 23, 2016 |
| Grant date | Nov 28, 2017 |
| Priority date | — |
| Expiry date | Dec 23, 2036 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01S5/20
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A method using a tow body and sensor array for locating an underwater location beacon is provided. The steps of the method are moving the body and array in a direction of motion; orientating the array orthogonal to the direction of motion; beamforming acoustic conical beams from the array onto a seafloor; detecting a time series of acoustic data channels from the beacon; converting the data channels into spatial beams of acoustic frequency; determining if a signal of the underwater location beacon is present from each spatial beam; calculating likelihood functions for locations of the beacon to represent an area of the seafloor from which the signal of the underwater location beacon is to have originated; accumulating likelihood functions for the location of the underwater location beacon over the course of a search pattern; and producing a grid for a beacon location based on the likelihood functions.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.