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    • 14. 发明申请
    • BARKHAUSEN NOISE INSPECTION APPARATUS AND INSPECTION METHOD
    • BARKHAUSEN噪声检测装置和检查方法
    • US20110199081A1
    • 2011-08-18
    • US12998392
    • 2009-10-22
    • Yui MasudaMasatoshi Mizutani
    • Yui MasudaMasatoshi Mizutani
    • G01R33/02
    • G01N27/725
    • A Barkhausen noise inspection device of the present invention includes a detecting head (1), made up of an exciting coil (2) for magnetizing an object (30) to be inspected, a detecting coil (3) for detecting Barkhausen noises generated from the object (30) having been magnetized, and an electric power source (12) for supplying to the exciting coil (2) an alternating current necessary to generate an alternating magnetic field necessary for magnetization. A magnetic flux detecting sensor (6) is provided for detecting the magnitude of a magnetic flux used to excite the object (30). Also, an electric current control module (11) is provided for controlling the alternating current of the electric power source (12) on the basis of the magnitude of the magnetic flux, detected by the magnetic flux detecting sensor (6), to thereby maintain the magnitude of the magnetic flux, used to excite the object (30), at a constant value.
    • 本发明的巴克豪森噪声检测装置包括:检测头(1),由用于磁化待检查物体(30)的励磁线圈(2)构成;检测线圈(3),用于检测从所述检测线产生的巴克豪森噪声 物体(30),以及用于向励磁线圈(2)供给产生磁化所需的交变磁场所需的交流电的电源(12)。 提供磁通检测传感器(6),用于检测用于激发物体(30)的磁通量的大小。 另外,提供电流控制模块(11),用于根据由磁通检测传感器(6)检测的磁通量的大小来控制电源(12)的交流电流,从而维持 用于激励物体(30)的磁通量的大小为恒定值。