Method of current distribution parameters measuring with using reference magnetic field source

The method for measurement of current distribution parameters is described in this work. Main feature of the method is compensation of magnetometer errors by using reference distribution. The measurement errors are compensated by using the error model parameters. The parameters are fitted on reference current distribution data. The method was tested on 3-axis Hall magnetometer with motorized positioning system. Its absolute accuracy is about 5 µm and dynamic range is 20 × 200 × 300 mm3. Sensitivity of the magnetometer is about 1 nT on averaging time of 5 s. Measurement error coordinate and magnetic moment of a circular current loop are not more than 5 µm by and 10-8 A⋅m2 accordingly.