EQUIPMENT FOR MEASURING FEEBLE MAGNETIC FIELD, METHOD FOR EXTRACTING REQUIRED COMPONENT AND EQUIPMENT FOR MEASURING THE COMPONENT

摘要

PROBLEM TO BE SOLVED: To suitably obtain a feeble magnetic field at all times even if there are variations in an external magnetic field. SOLUTION: The feeble magnetic field component S of notice time is obtained using the optimum weighted coefficient W obtained from the observed signal X and noise signal N in the predetermined time range based on the notice time. Thus, because the weighted coefficient continues to be renewed instead of continuing to use the weighted coefficient which is previously determined, it is possible to meet even if there are variations in the external magnetic field and the feeble magnetic field can be suitably obtained at all times.