Visualization of magnetic flux with mixed frequency components using 3n/2 terminal type AC magnetic flux CT probe

A visualization method of magnetic flux density distribution using CT (Comp uted Tomography) technique was presented. In this method, the sensor (CT pr obe) is composed of only the coil pattern plane, and can visualize two-dime nsional distribution of magnetic flux density of vertical component in the plane. If the sensor is composed as multi-layered CT probe, it is also poss ible to image of magnetic flux density distribution without physical scanni ng motion. To perform high sensitivity measurement, we propose a new shape of coil pattern with switch mechanism. And we perform visualization of one frequency component of magnetic flux density distribution from a mixed freq uency magnetic field.