Magnetic immunization method for e.g. ships, involves measuring gradient of magnetic field by sensor to determine position of magnetic abnormality, and changing current flowing in loops based on measured values of sensor

摘要

The method involves assigning conductive loops (110) to a measuring sensor (111). The sensor is arranged in proximity to the loops. A gradient of a magnetic field is measured by the sensor to determine a position of magnetic abnormality. Current flowing in the loops is changed based on the measured values of the sensor to compensate the abnormality, where the current is proportional to a signal change of the sensor to compensate the signal change by regeneration. Strength of the current is determined in a phase of a calibration to compensate a magnetic force.