Device for generating in the ground both transverse and longitud

Details Device for generating in the ground both transverse and longitud Device for generating in the ground both transverse and longitud

1987-12-23

1989-07-25

Kyle, Deborah L.

Acoustics

Geophysical or subsurface exploration

Seismic wave generation

181121, 367 75, G01V 104

Patent

active

048504513

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.

REFERENCES:
patent: 4390077 (1983-06-01), Fulkerson
patent: 4564083 (1986-01-01), Layotte et al.
patent: 4660674 (1987-04-01), Airhart
patent: 4721181 (1988-01-01), Airhart et al.
patent: 4799572 (1989-01-01), Airhart

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