MAGNETIC DETECTION DEVICE AND PAPER SHEET PROCESSING DEVICE

摘要

A magnetic detecting device according to an embodiment includes: a magnetic sensor head in which a plurality of magnetic sensing units including a first magnetic sensing unit and a second magnetic sensing unit are arranged; and an environmental magnetism correcting unit. The plurality of magnetic sensing units is arranged in one line over a length that is greater than a width of a sheet, in a direction that is orthogonal to a movement direction of the sheet. The environmental magnetism correcting unit corrects a first output signal output by the first magnetic sensing unit, based on a second output signal output by the second magnetic sensing unit. The magnetic sensor head has a sheet passage area that faces a sheet that passes over the magnetic sensor head, the first magnetic sensing unit is positioned inside the sheet passage area, and the second magnetic sensing unit is positioned outside the sheet passage area.