Electromagnetic transducer

Details Electromagnetic transducer Electromagnetic transducer

G - Physics

01

N

349/42

G01N 29/04 (2006.01) B06B 1/04 (2006.01) G01N 29/24 (2006.01)

Patent

CA 1112754

ABSTRACT OF THE DISCLOSURE A magnet is used to create a static magnetic field adjacent to the surface of a conductive material. At least one conductor runs through the magnetic field. When a pulse of current flows through the conductor, an elastic wave is generated in the material. In a preferred embodiment, a row of individual permanent magnets is used to create a periodic magnetic field. One side of a coil is placed in the periodic magnetic field so that a sheet of current moves transverse to the magnetic field when a pulse of current flows through the coil. When the coil is oriented parallel to the row of magnets, a horizontal shear wave is generated in the material. When the coil is oriented transverse to the row of magnets, a Lamb wave is generated in the material.

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