PROBLEM TO BE SOLVED: To provide a detection coil shape that minimizes the increase of an ac resistance component generated by a multi-layer winding of the detection coil, and to provide a high sensitivity magnetic detection device.SOLUTION: The detection coil is formed into a detection coil shape having the number of layers that are fewer than twice a number n of layers calculated by the formula (10), wherein a litz wire employing a strand having a minimum diameter is used for the detection coil. Regarding voltage obtained by the detection coil, voltage or current is amplified, thereby achieving the high sensitive magnetic detection device.COPYRIGHT: (C)2012,JPO&INPIT【課題】検出コイルの多層巻きによって発生する交流抵抗成分の増加を最小限にする検出コイル形状および高感度磁気検出装置を提供する。【解決手段】検出コイルに式(10)で計算される層数nの2倍より小さい層数とする検出コイル形状とし、この検出コイルに素線径がなるべく小さいリッツ線を使用する。この検出コイルで得られる電圧を電圧増幅または電流増幅を行い高感度磁気検出装置を実現する。【選択図】図2
