Using Magnetic Hysteresis for Testing Electroconduetive Objects in Pulsed Magnetic Fields

摘要

The distributions ofthe electric voltage U(t) that is read from an induction magnetic head as it scans a discrete magnetic medium with residual magnetic field records that were obtained under the action of a pulsed magnetic field with different-polarity surges on a magnetic medium with a tested object are given. The onset of ordered distributions of the residual magnetic fields on the magnetic medium due to the sequential action on it by pulses of the magnetic field is called the hysteresis interference of a pulsed magnetic field (H1). The scheme of an experimental device for studying propagations of pulsed magnetic fields and methods of testing objects made of electroconduetive and magnetic materials, which increase the accuracy ofthe determination of their specific conductivity σ, permeability μ, distribution uniformity of σ and μ, thickness, and parameters of continuous defects in them, are described.