| 摘要 |
PURPOSE:To prevent the phase shift of the position of a pulse generating magnetic field due to the mutual interference of amorphous metal fine wires by parallelly arranging the respective amorphous metal fine wires to an article so that at least one end parts of the amorphous metal fine wires are mutually shifted from the end parts of the other adjacent amorphous metal fine wires in the longitudinal direction. CONSTITUTION:For example, when five kinds of amorphous metal fine wires 1, 2, 3, 4, 5 having respectively different large Barkhausen discontinuous generated magnetic field values are used in an article discriminating mark, the amorphous metal fine wire having the lowest Barkhausen generated magnetic field value generates magnetization reversal at first to generate the first pulse. However, the effective value of a magnetic field to the adjacent non- amorphous metal fine wire is changed by the amorphous metal fine wire generating magnetization reversal and the next pulse is generated according to circumferences on the basis of the exciting magnetic field value perfectly different from that in an independent case. In order to prevent the mutual interference between the amorphous metal fine wires, at least one end parts of the respective amorphous metal fine wires are arranged so as to be pref. shifted at an interval of 1mm or more from the end parts of the adjacent amorphous metal fine wires in the longitudinal direction when the respective amorphous metal fine wires are parallelly arranged in the mark. |
