G - Physics – 01 – N
Patent
G - Physics
01
N
G01N 29/24 (2006.01) B06B 1/02 (2006.01) G01N 27/90 (2006.01)
Patent
CA 2585823
The invention relates to a device and a method for testing the material of a test object (4), which contains at least electrically conductive and ferromagnetic material fractions and has at least one engineered surface (5), by means of at least one electromagnetic ultrasonic transducer assembly (EMUS). Said assembly comprises a permanent or electromagnetic assembly (1) comprising at least two magnetic poles (N, S) of a differing polarity that face the engineered surface (5), in addition to an eddy current coil (2) that is placed in close proximity to the engineered surface (5) between the two magnetic poles (N, S) in direct or indirect relation to said surface (5). The invention is characterised in that the eddy current coil (2) is configured and arranged in such a way that when said coil (2) is supplied with an alternating current, free ultrasonic waves that run essentially perpendicular to the engineered surface (5) are generated and propagate inside the test object (4).
L'invention concerne un procédé et un dispositif de contrôle de matériaux sur un objet de contrôle (4) comportant des éléments au moins électriquement conducteurs et ferromagnétiques. Cet objet a au moins une surface technique (5) dotée d'au moins un ensemble électromagnétique transducteur d'ultrasons (EMUS), lequel comprend un dispositif d'aimant permanent ou d'électroaimant (1) pourvu d'au moins deux pôles magnétiques (N, S) orientés vers la surface technique (5) de polarité magnétique différente. Ledit objet comporte également au moins une bobine (2) à courant de Foucault disposée en projection sur la surface technique (5), entre les deux pôles magnétiques (N, S), en liaison directe ou indirecte avec ladite surface technique (5). L'invention est caractérisée en ce que la bobine (2) à courant de Foucault est conçue et disposée de telle sorte que son alimentation en courant de Foucault génère des ultrasons (2) libres s'étendant à l'intérieur de l'objet de contrôle (4) de manière sensiblement perpendiculaire à la surface technique (5).
Boulavinov Andrey
Kroening Michael
Nichiforenco Jorj
Fraunhofer-Gesellschaft Zur Foerderung Der Angewandten Forschung
Oyen Wiggs Green & Mutala Llp
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