Magnetic Permeability Measuring Method

A measuring device for measuring a magnetic permeability of a magnetic material, the magnetic permeability measuring device comprising:

• a measuring probe provided with a signal transmission line and capable of being set such that the magnetic material is brought close to or into contact with the signal transmission line;
• a magnetic field application unit configured to apply a magnetic field to the magnetic material;
• a signal measuring device configured to measure a measured permeability coefficient of the magnetic material;
• and
• an arithmetic processing device configured to calculate the magnetic permeability of the magnetic material based on the measured permeability coefficient by arithmetic processing, wherein
• the arithmetic processing device is configured to
• set an analysis model corresponding to a measurement condition for the measured permeability coefficient, and calculate, using finite element analysis, a calculated permeability coefficient of the magnetic material in the analysis model and the magnetic permeability of the magnetic material corresponding to the calculated permeability coefficient,
• acquire a first set comprising a plurality of pairs of real parts and imaginary parts of the magnetic permeability corresponding to a real part of the calculated permeability coefficient that matches a real part of the measured permeability coefficient,
• acquire a second set comprising a plurality of pairs of real parts and imaginary parts of the magnetic permeability corresponding to an imaginary part of the calculated permeability coefficient that matches an imaginary part of the measured permeability coefficient, and
• determine the magnetic permeability whose real part and imaginary part match in the first set and the second set.