Method for determining the shape of an underground cavity and the position of the surface separating two media contained therein and device for carrying out said method
US3961683A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Jun 21, 1973 |
| Grant date | Jun 8, 1976 |
| Priority date | — |
| Expiry date | Jun 21, 1993 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01S15/88
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
Method for determining the shape of an underground cavity and the location of the interface between two media contained therein by making use of a sonic sonde comprising performing, for each position of the sonde, a series of measurements of the time interval between the transmission of an ultrasonic wave from the sonde and the reception of the corresponding echo after reflection on the wall of the cavity, the selection from said measurements of one of those indicating substantially identical time intervals so as to eliminate the false echos and the determination of the average value of the propagation time of said selected echo for each different location of the sonde and for each direction of the transmitted waves.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.