METHOD OF OSCILLATION NOISE REDUCTION USING INTERCORRELATION AND AC SIGNAL EXTRACTION METHOD

摘要

PROBLEM TO BE SOLVED: To provide a magnetic measuring method capable of reducing oscillation noise and accurately measuring target AC magnetic signals.

SOLUTION: Two magnetic sensors are arranged at some location to measure magnetic fields of the location. Detection data D3_iof one sensor are captured (step ST2), and filter processing is applied to the data D3_i(step ST3). Detection data D4_iof the other sensor are captured (step ST4), and filter processing is applied to the data D4_i(step ST5). The intercorrelation between filter-processed data D3_if of the one sensor and filter-processed data D4_if of the other sensor are determined to determine data Di (step ST6). The data Di are taken as detection magnetic data.

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