ANORDNING FOR SAMTIDIG FREMBRINGELSE AV TRANSVERSALE OG LONGITUDINALE AKUSTISKE BOELGER I JORDEN.

摘要

P device to generate in the ground of the acoustic waves and by causing a mass against a target element - torque with the surface of the ground. / p & & p & - the target element - evide 1 is in its central part and comprises an inner wall 4 a tilted with respect to the vertical of frustoconical shape, for example. The mass 7 is fixed to the end of an arm 6 to pivot with respect to a support structure in the form of a cage parallelepipedal. That - latter is movable by the jacks 35 between a raised transport position, and a bottom position or the element - target is coupled with the ground. The motor means 43 permit elevate the ground by pivoting the arm 6. The geometry of the assembly is calculated so that the mass comes to strike the faces inland incline perpendicularly to those - latter, and thus creates a both p and s waves / p & & p & - a seismic prospecting, for example. / p