Electromechanical transducer device for generating and detecting elastic waves in a plate.

摘要

The invention relates to electromechanical devices for exciting elastic waves in a plate. The relevant elastic waves have a transverse component perpendicular to the plane of the large faces of the plate and a longitudinal component corresponding to the direction of propagation. The subject of the invention is an excitation device which transmits the vibrations produced by a transducer means 5, 6, 7 by pinching it and the plate 1 between two transmitter arms 19, 20 connected by a bridging element 18. The invention applies in particular to the excitation of symmetric and anti-symmetric Lamb waves and to that of surface elastic waves. <IMAGE>