Device for generating in the ground both transverse and longitudinal acoustic waves in a plurality of different directions
US4850451A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Dec 23, 1987 |
| Grant date | Jul 25, 1989 |
| Priority date | — |
| Expiry date | Dec 23, 2007 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01V1/147
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A device for generating in the ground longitudinal and transverse acoustic waves by a mass striking a target element coupled with the surface of the ground. The target element is recessed in a central part thereof and have an inner wall slanted with respect to the vertical in the form of, for example, a truncated cone. The mass is fixed to the end of an arm pivoting with respect to a support structure in the form of a parallelepipedic cage, which is movable by a cylinder between a high transport position and a low position in which the target element is coupled with the ground a drive causes raising of the mass by pivoting the arm with the geometry of the assembly being calculated so that the mass strikes the inner slanting faces perpendicularly thereto, and thus creates both P and S waves.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.