The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jan. 15, 2002
Filed:
Mar. 24, 2000
Patrick Meynier, Chatou, FR;
Other;
Abstract
Compact vibrator for emitting elastic waves in a material medium such as the subsoil. The vibrator comprises a baseplate ( ) intended to be coupled in operation with a surface of this medium, an inertia mass ( ) and at least a pair of electromechanical transducers ( ) comprising each one or more pillars (A, B) made for example of a piezoelectric or magnetostrictive material. Pillars (A) of first transducer ( ) are interposed between baseplate ( ) and a relay plate ( ). Pillars (B) of the second transducer are interposed between relay plate ( ) and inertia mass ( ), on the same side of relay plate ( ) as pillars (A) preferably, so that inertia mass ( ) is positioned in the vicinity of baseplate ( ), which contributes to the compactness and to the stability of the vibrator that can therefore be used on slightly sloping surfaces. An excitation generator ( ) comprising phase shifting means ( ) respectively applies to transducers (A, B) phase-shifted signals that are amplitude-modulable, so that their vibrations combine. The vibrator can be applied: notably for equipping an underground zone under development with periodic seismic monitoring means or for carrying out seismic prospecting operations.