Patent ID: 6338394
Filing Date: 2002-01-15
Classification: G01V

Abstract:
A piezoelectric vibrator for emitting elastic waves in a material medium, comprising a baseplate coupled in operation with a surface of the material medium, an inertia mass connected to the baseplate by electrically exciting a vibrator electrically connected to an excitation generator, wherein the electrically excited vibrator includes at least two electromechanical transducers, each electromechanical transducer including at least one elongate motive element, each motive element of the first transducer connecting the baseplate to a relay plate and each motive element of the second transducer being connected at a first end to the relay plate and connected at the opposite end thereof to an inertia mass situated between baseplate and the relay plate, the excitation generator being connected to the electromechanical transducers by a phase shifter which applies phase-shifted signals to the electromechanical transducers to cause vibratory signals to be emitted by the electromechanical transducers.