JPH0820520B

PURPOSE:To give great vibromotive force to a borehole if it is small in diameter radiation of a P-wave and efficiently produce a S-wave in a borehole. CONSTITUTION:A number of plate materials 10 and elastic members 12 are alternately laminated, and laminates 16 laid between both plate materials 10 w...

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Bibliographic Details
Main Author OGURA KIMIO
Format Patent
LanguageEnglish
Published 04.03.1996
Edition6
Subjects
DETECTING MASSES OR OBJECTS
GEOPHYSICS
GRAVITATIONAL MEASUREMENTS
MEASURING
PHYSICS
TESTING
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Summary:PURPOSE:To give great vibromotive force to a borehole if it is small in diameter radiation of a P-wave and efficiently produce a S-wave in a borehole. CONSTITUTION:A number of plate materials 10 and elastic members 12 are alternately laminated, and laminates 16 laid between both plate materials 10 with oscillation supporting point members 14 in the same direction, a weight dropping mechanism to give heavy blow to the upper parts on the single sides facing each other across the supporting points of the laminates 16 by the drop of a weight 18 are provided. The respective plate members are supported by the oscillation supporting point members at certain spaces and supported horizontally by the elastic members. When the weight drops, the heights at the centers of the laminates remain unchanged, a space between both plate materials given heavy blow is narrowed and a space is widened on the opposite side. Water is rushed out of the narrowed space to the outside and in-hole water is rushed into the widened space from the outside, so that the impulse produces a S-wave on a borehole wall.
Bibliography:Application Number: JP19920273676