Electricity: measuring and testing – Magnetic – With means to create magnetic field to test material
Patent
1990-01-29
1992-09-08
Strecker, Gerard R.
Electricity: measuring and testing
Magnetic
With means to create magnetic field to test material
324237, 324242, 340676, G01N 2782, G01N 2790, G01R 3312
Patent
active
051461633
ABSTRACT:
An apparatus for detecting crack on an elongated metal strip employs a plurality of surface condition detecting means operating in synchronism with each other so as to detect the surface conditions of the orientations of the steel belt, which orientations are longitudinally the same position but transversely at different position. The apparatus further includes means for deriving a difference of outputs between the plurality of the surface condition detecting means. A discriminator means is also provided in the apparatus for discriminating the surface condition of the strip on the basis of the difference derived by the difference deriving means.
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Kabushiki Kaisha Meidensha
Strecker Gerard R.
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