Measuring and testing – Vibration – By mechanical waves
Patent
1982-01-11
1984-03-06
Ciarlante, Anthony V.
Measuring and testing
Vibration
By mechanical waves
G01N 2904
Patent
active
044346638
ABSTRACT:
Disclosed is an electromagnetic acoustic transducer for use with electrically conductive objects. The transducer includes an electromagnet for establishing a static magnetic field directed into the object in a first region and directed out of the object in a second region. A meander coil for inducing eddy currents in the object when an alternating current is applied to the coil includes a first serpentine printed circuit on a first side of a printed circuit board and a second serpentine printed circuit on a second side of the board. The source and the coil are so oriented that the vector product of the field and the eddy currents produces an instantaneous force field in the object which is periodically alternately oriented.
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Peterson William E.
Thompson Robert B.
Ciarlante Anthony V.
Deinken John J.
Hamann H. Fredrick
Malin Craig O.
Rockwell International Corporation
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