WIRE ROPE FLAW DETECTOR AND ADJUSTMENT METHOD THEREFOR

    公开(公告)号:US20190079053A1

    公开(公告)日:2019-03-14

    申请号:US16084527

    申请日:2016-03-24

    IPC分类号: G01N27/83

    CPC分类号: G01N27/83 G01N2291/2626

    摘要: Provided is a wire rope flaw detector, which is capable of improving detection accuracy for a wire rope breakage by keeping an interval between a wire rope to be subjected to a measurement and an adjacent wire rope. The wire rope flaw detector includes: a magnetizer, which is configured to form a main magnetic path in a predetermined set interval of a wire rope in an axial direction of the wire rope; a detection coil, which is arranged in the predetermined set interval so as to be magnetically insulated from the magnetizer and is configured to detect a leakage magnetic flux generated by a damage portion of the wire rope; and position restricting mechanisms, which are configured to keep an interval between the wire rope passing through the detection coil and a wire rope adjacent to the wire rope passing through the detection coil.

    WIRE ROPE FLAW DETECTION DEVICE
    4.
    发明申请

    公开(公告)号:US20180299408A1

    公开(公告)日:2018-10-18

    申请号:US15766160

    申请日:2015-11-02

    IPC分类号: G01N27/87

    CPC分类号: G01N27/87 G01N27/83

    摘要: Provided is a wire rope flaw detector including a magnetizer configured to form a main magnetic flux in a part of a wire rope in a longitudinal direction thereof. A plurality of search coils are configured to detect a leakage flux that occurs from a damaged part of the wire rope in a segment in which the main magnetic flux is formed. A control unit is configured to detect induced voltages generated in the plurality of search coils. Further, the control unit is configured to superimpose voltage waveforms of the plurality of search coils on one another while shifting the voltage waveforms by a time calculated based on an interval between the plurality of search coils adjacent to each other and on a relative moving speed of the wire rope with respect to the magnetizer, to thereby amplify a peak of the induced voltage.