Method and device for detecting objects dispersed in an area of land by determining propagation characteristics of an acoustic wave in the ground
US5615174A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Dec 4, 1995 |
| Grant date | Mar 25, 1997 |
| Priority date | — |
| Expiry date | Dec 4, 2015 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01S15/89
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A process and a device for detecting objects, in particular mines, dispersed in an area of land, or for determining propagation characteristics of an acoustic wave in the ground of an area of land. This process employs a plurality of acoustic transducers and reference targets distributed along borders of the area. After determining an optimal working frequency, a cartography of the propagation characteristics in the ground of the area of land is made, for example, by carrying out several temporal reversals, one after the other, of the signals received by the transducers so as to focus detection on the different reference targets. Objects are detected with the aid of this cartography by focusing detection by temporal reversal on an object and by searching for at least two transducers which have the lowest propagation time for the signal.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.