公开(公告)号：US06864793B2

公开(公告)日：2005-03-08

申请号：US10097882

申请日：2002-03-14

申请人： Yoshiki Ono ,  Tatsuya Kurihara ,  Shigemi Sato ,  Sumikazu Oki

发明人： Yoshiki Ono ,  Tatsuya Kurihara ,  Shigemi Sato ,  Sumikazu Oki

IPC分类号： C22C38/02 ,  C22C38/08 ,  C22C38/10 ,  C22C38/12 ,  C22C38/30 ,  G08B13/24 ,  H01F1/03 ,  H01F1/14 ,  H01F1/153 ,  G08B13/14

CPC分类号： G08B13/2408 ,  C22C38/02 ,  C22C38/08 ,  C22C38/10 ,  C22C38/12 ,  C22C38/30 ,  G08B13/244 ,  G08B13/2442 ,  G08B13/2445 ,  H01F1/0304 ,  H01F1/0306 ,  H01F1/143 ,  H01F1/15391 ,  Y10T29/49988 ,  Y10T428/11 ,  Y10T428/12431 ,  Y10T428/12465

摘要： A magnetic marker comprises a magnetically switchable wire and a magnetic casing that covers the magnetically switchable wire. The magnetically switchable wire is formed of a magnetic material that undergoes occurrence of sharp magnetic inversion when an alternating field of intensity higher than its coercive force is applied to it. The magnetic casing is formed of a magnetically hard or semihard magnetic material and can apply a bias magnetic field to the magnetically switchable wire to prevent magnetic inversion of the magnetically switchable wire. Heat-treated portions and high-coercivity regions, which are not heat-treated, are formed alternately in the longitudinal direction on the magnetic casing. The heat-treated portions are given magnetic properties different from magnetic properties essential to the magnetic casing by heat treatment such as annealing.

摘要翻译： 磁性标记器包括可磁转换线和覆盖可磁转换线的磁性壳体。 磁性可切换线由强磁场强度高于其矫顽力的交变场施加时，会发生尖锐的磁性反转的磁性材料形成。 磁性壳体由磁性硬的或半硬质的磁性材料形成，并且可以将磁偏置磁场施加到可磁转换的线上，以防止磁性可转换的线的磁性反转。 未经热处理的热处理部和高矫顽力区在磁性壳体上沿长度方向交替地形成。 热处理部分具有不同于通过诸如退火的热处理对磁性壳体所必需的磁性能的磁性能。