Electromagnetic acoustic transducer and methods of determining p

Details Electromagnetic acoustic transducer and methods of determining p Electromagnetic acoustic transducer and methods of determining p

1999-04-19

2000-09-19

Kwok, Helen C.

Measuring and testing

Vibration

By mechanical waves

73668, G01N 2924

Patent

active

061195227

ABSTRACT:
An electromagnetic acoustic transducer for inducing and sensing vibrations n a cylindrical object and methods of using an electromagnetic acoustic transducer to determine resonant frequencies and physical properties of cylindrical objects. The electromagnetic acoustic transducers produce specific modes of vibration in cylindrical objects including axial shear vibrations. The electromagnetic acoustic transducers are used to determine the temperature, dimensions, elastic constants, and damping coefficients of cylindrical objects, the magnitude of a load applied to a cylindrical object, or the texture or grain orientation of the material forming a cylindrical object.

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patent: 4289030 (1981-09-01), Alers et al.
patent: 4305294 (1981-12-01), Vasile et al.
patent: 4450725 (1984-05-01), Yamaguchi et al.
patent: 4466287 (1984-08-01), Repplinger et al.
patent: 5895856 (1999-04-01), Johnson et al.

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