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    • 4. 发明授权
    • Wire-rope flaw detector
    • 钢丝绳探伤仪
    • US07982458B2
    • 2011-07-19
    • US12421677
    • 2009-04-10
    • Takashi YoshiokaHiroshi SasaiYoshinori Miyamoto
    • Takashi YoshiokaHiroshi SasaiYoshinori Miyamoto
    • G01N27/82G01R33/12G01R31/28
    • G01N27/82
    • There is obtained a wire-rope flaw detector capable of realizing a high signal-to-noise ratio even in the case where only one detection coil is disposed. In the wire-rope flaw detector, there are provided a magnetizer that forms main magnetic flux in a predetermined section located along an axis direction of a wire rope (1) and a detection coil (8) that detects, in the predetermined section, leakage magnetic flux (13) emitted from a flaw portion (10) of the wire rope (1); a magnetic circuit member (7) made of a ferromagnetic material intervenes in a magnetic circuit for leakage magnetic flux that is interlinked with a detection coil (8); and in a space where at least one of the end portions, of the magnetic circuit member (7), that serve as the inflow port and the outflow port for the leakage magnetic flux is inserted between the detection coil (8) and a wire rope (1), an opening portion extends in such a way as to intervene between the foregoing end portion and the other end portion and is inserted between the detection coil (8) and the wire rope (1).
    • 即使在仅设置一个检测线圈的情况下,也可以获得能够实现高信噪比的钢丝绳探伤仪。 在钢丝绳探伤仪中,设置有沿着钢丝绳(1)的轴线方向的预定部分形成主磁通量的磁化器和检测线圈(8),该检测线圈(8)在预定的部分检测泄漏 从钢丝绳(1)的缺陷部分(10)发射的磁通(13); 由铁磁材料制成的磁路构件(7)插入与检测线圈(8)相互连接的泄漏磁通的磁路中; 并且在检测线圈(8)和钢丝绳(8)之间插入用作流入口的磁路部件(7)的端部和泄漏磁通量的流出口中的至少一个的空间 (1)中,开口部以这样的方式延伸,以便介于前述端部与另一端部之间,并且插入在检测线圈(8)和钢丝绳(1)之间。