Method of generating and measuring torsional waves in...

Details Method of generating and measuring torsional waves in... Method of generating and measuring torsional waves in...

2006-09-21

2009-11-10

Noori, Max (Department: 2855)

Measuring and testing

Dynamometers

Responsive to torque

C073S862331

Reexamination Certificate

active

07614313

ABSTRACT:
A method and apparatus for generating and measuring a torsional wave in a rod, shaft or pipe using magnetostriction are provided. The magnetostrictive transducer includes at least one strip attached to a predetermined position of a rod member, an insulator disposed around the strip, a coil wound around the insulator, and magnets providing a bias magnetic field to the strip, wherein a plurality of strips are attached to the rod member at predetermined intervals in a circumferential direction, and one pole of the magnet is close to an end of a first strip among the plurality of strips, and another pole of the magnet is close to an end of a second strip among the plurality of strips.

REFERENCES:
patent: 5022275 (1991-06-01), Satoh et al.
patent: 6624628 (2003-09-01), Kwun et al.
patent: 7215118 (2007-05-01), Park et al.
patent: 7295001 (2007-11-01), Kim et al.

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