Measuring and testing – Dynamometers – Responsive to torque
Reexamination Certificate
2006-05-31
2009-11-24
Patel, Harshad (Department: 2855)
Measuring and testing
Dynamometers
Responsive to torque
Reexamination Certificate
active
07621189
ABSTRACT:
Provided is a method and apparatus for generating and sensing torsional vibrations using magnetostriction, in order to perform modal testing on a bar, a pipe, a shaft, a beam, or the like. The apparatus includes a torsional vibration generating part transmitting torsional vibrations to a test part having an arbitrary cross-section and a predetermined length, and a torsional vibration sensing part sensing the torsional vibrations generated from the torsional vibration generating part. The torsional vibration generating part and/or the torsional vibration sensing part includes a magnetostrictive body attached around the test part and made of a magnetostriction material, a first magnetic field forming part forming a magnetic field around the test part in a circumferential direction of the magnetostrictive body, and a second magnetic field forming part forming a magnetic field to the magnetostrictive body in a direction substantially perpendicular to the direction of the magnetic field formed by the first magnetic field forming part and in parallel with a longitudinal direction of the test part.
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Cho Seung Hyun
Han Soon Woo
Kim Yoon Young
Park Chan Il
Davis Octavia
Patel Harshad
Rothwell, Figg, Ernst & Manbeck pc
Seoul National University Industry Foundation
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