Process for measuring stress of magnetic materials, FRP member w

Details Process for measuring stress of magnetic materials, FRP member w Process for measuring stress of magnetic materials, FRP member w

1995-01-26

1997-06-17

O'Shea, Sandra L.

Electricity: measuring and testing

Magnetic

Stress in material measurement

427 8, G01B 724, B05D 512

Patent

active

056400888

ABSTRACT:
In measuring a stress of a soft magnetic metal wire, an A.C. magnetic field exceeding a coercive force of the metal wire is applied to the soft magnetic metal wire with a tensile load applied thereto, using an exciting coil, thereby inducing an A.C. electromotive force through a detecting coil. An effective value of one or more higher harmonic wave components including a stress information of the soft magnetic metal wire in the waveform of the A.C. electromotive force is determined as a measurement amount. By taking higher harmonic wave components as an amount in this manner, the stress of the soft magnetic metal wire 4 can be measured correctly.

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