Electricity: measuring and testing – Magnetic – With means to create magnetic field to test material
Patent
1995-07-17
1997-04-08
Snow, Walter E.
Electricity: measuring and testing
Magnetic
With means to create magnetic field to test material
324209, 324262, 364481, 73779, G01B 724, G01N 2772, G01R 3300
Patent
active
056191359
ABSTRACT:
A steel hardness measurement system and method of using same are provided for measuring at least one mechanical or magnetic characteristic of a ferromagnetic sample as a function of at least one magnetic characteristic of the sample. A magnetic field generator subjects the sample to a variable external magnetic field. The magnetic field intensity of the magnetic field generated by the magnetic field generating means is measured and a signal sensor is provided for measuring Barkhausen signals from the sample when the sample is subjected to the external magnetic field. A signal processing unit calculates a jump sum rate first moment as a function of the Barkhausen signals measured by the signal sensor and the magnetic field intensity, and for determining the at least one mechanical or magnetic characteristic as a function of the jump sum rate first moment.
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Hicho George
Kohn Gabriel
Swartzendruber Lydon
American Iron and Steel Institute
Snow Walter E.
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