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    VERFAHREN ZUR ZERSTÖRUNGSFREIEN PRÜFUNG VON ROHREN
    52.
    发明授权
    VERFAHREN ZUR ZERSTÖRUNGSFREIEN PRÜFUNG VON ROHREN 有权
    VERFAHREN ZURZERSTÖRUNGSFREIENPRÜFUNGVON ROHREN

    公开(公告)号：EP1769239B1

    公开(公告)日：2011-11-30

    申请号：EP05761472.9

    申请日：2005-06-10

    申请人： V & M Deutschland GmbH

    发明人： KAACK, Michael ,  NITSCHE, Stefan ,  ORTH, Thomas

    IPC分类号： G01N27/87 ,  G01N27/83

    CPC分类号： G01N27/87

    摘要： The invention relates to a method for testing pipes (1) in a non-destructive manner with the aid of a dispersion flow, said pipes being made of ferromagnetic steel. According to the invention, the pipe which is displaced in the longitudinal direction and, optionally, rotated is magnetised by a continuous field and the produced magnetic flow is transmitted in a contactless manner to the pipe. Projections (4, 4') which are located in the areas close to the surface of the external and internal surfaces of the pipes provoke magnetic dispersion flows which exit the surface of the pipe and can be detected by sensors (2, 2'). Ampltitudes, preferably the horizontal field components of the magnetic flow, which can alter in the vertical direction are detected at a distance close to the surface of the external surface of the pipe and at a distance therefrom. The detected signals are determined in relation to each other. The invention also relates to the device for carrying out said method.

    摘要翻译： 本发明涉及一种借助分散流以非破坏性方式测试管（1）的方法，所述管由铁磁钢制成。 根据本发明，沿纵向移位并且可选地旋转的管道被连续磁场磁化，并且所产生的磁流以非接触方式传递到管道。 位于靠近管道外表面和内表面的区域中的凸起（4,4'）引起离开管道表面的磁性分散流动，并且可以由传感器（2,2'）检测到。 在靠近管道外表面的一段距离处以及在距该管道外表面一定距离处检测可在垂直方向上改变的磁流的水平场分量，优选水平场分量。 检测到的信号是相互关联确定的。 本发明还涉及用于执行所述方法的设备。

    VERFAHREN ZUR ZERSTÖRUNGSFREIEN PRÜFUNG VON ROHREN
    53.
    发明授权
    VERFAHREN ZUR ZERSTÖRUNGSFREIEN PRÜFUNG VON ROHREN 有权
    VERFAHREN ZURZERSTÖRUNGSFREIENPRÜFUNGVON ROHREN

    公开(公告)号：EP2286212B1

    公开(公告)日：2011-10-19

    申请号：EP09745434.2

    申请日：2009-04-02

    申请人： V & M Deutschland GmbH

    发明人： GROOS, Andreas ,  NITSCHE, Stefan

    IPC分类号： G01N27/87

    CPC分类号： G01N27/87

    摘要： The invention relates to a method for the nondestructive testing of pipes made of ferromagnetic steel for flaws by means of leakage flux, wherein the pipe is magnetized by a constant field and the flaws present in the near-surface region of the outer or inner surface of the pipe cause magnetic leakage flux, which exits the pipe surface and is detected by probes of a test unit each for longitudinal and/or transversal flaw testing, wherein the association of the detected amplitude signals is performed on the basis of the amplitude height and/or the frequency spectrum with respect to an outer or inner flaw by external or internal flaw thresholds. To this end, prior to associating the detected amplitude signals with an external or internal flaw, the angular position of the flaw relative to the respective magnetic field direction is determined, and a correction of the signals is carried out by way of a previously determined corrective factor for amplitudes and/or frequencies.

    摘要翻译： 本发明涉及一种借助于漏磁通对铁磁钢制成的管道进行无损检测的方法，其中该管道被恒定磁场磁化并且存在于外表面或内表面的近表面区域中的缺陷 管道产生磁泄漏通量，该磁泄漏通量离开管道表面并且由测试单元的探针检测，每个用于纵向和/或横向缺陷测试，其中检测到的幅度信号的关联基于振幅高度和/ 或外部或内部缺陷阈值相对于外部或内部缺陷的频谱。 为此，在将检测到的振幅信号与外部或内部缺陷相关联之前，确定缺陷相对于相应磁场方向的角位置，并且通过预先确定的校正来执行信号的校正 幅度和/或频率的因子。

    Flaw detector of wire-rope
    54.
    发明公开
    Flaw detector of wire-rope 审中-公开
    对于钢丝绳断裂检测器

    公开(公告)号：EP1995589A3

    公开(公告)日：2010-05-26

    申请号：EP08009385.9

    申请日：2008-05-21

    申请人： Hitachi Ltd.

    发明人： Asai, Daisuke c/o Hitachi Ltd. ,  Ariga, Masaki c/o Hitachi Ltd.

    IPC分类号： G01N27/87

    摘要： A flaw detector of a wire-rope is provided which can enhance the reliability of measurement for a damage which is located even in a deep part of the wire-rope, by detecting a leakage magnetic flux caused in a damaged part of a steel wire. The flaw detection includes a magnetizer (2) for magnetizing a wire-rope (1) in the longitudinal direction of the latter, a plurality of magnetic detection means (3, 4) arranged in the circumferential direction of the wire-rope (1), for detecting a leakage magnetic flux, storages (8, 10) previously storing therein depths of damage parts, values of damage, sums of values detected by the plurality of magnetic detection means, difference values detected by adjacent magnetic detection means, wherein a depth and a value of damage of the damaged value are obtained from the values detected by the magnetic detection means and then the value stored in the storage.

    Vorrichtung zum Erkennen von Defekten an Metallteilen
    55.
    发明公开
    Vorrichtung zum Erkennen von Defekten an Metallteilen 审中-公开
    Vorrichtung zum Erkennen von Defekten a Metallteilen

    公开(公告)号：EP1847829A1

    公开(公告)日：2007-10-24

    申请号：EP07007762.3

    申请日：2007-04-17

    申请人： Prüftechnik Dieter Busch AG

    发明人： Zimmermann, Bernd

    IPC分类号： G01N27/87

    CPC分类号： G01N27/87

    摘要： Das Streuflußmeßgerät zur Detektion von oberflächennahen und oberflächenfernen Defekten an ferromagetischen Prüflingen (10) zeichnet sich aus durch mindestens eine flachliegende Spule (20) oder eine äquivalent wirkende Kern-/Spulenkombination (24, 22) sowie mindestens eine aufrecht stehende Spule (30, 40) oder eine äquivalent wirkende Kern-/Spulenkombination (34, 32; 44,42).

    摘要翻译： 该装置具有具有芯（24,34,44）的线圈（22,32,42），其中线圈（22）和芯（24）的组合适合于在存在通量线（...）的情况下产生可检测信号 15）。 由组合产生的可检测信号被馈送到放大器和功率调节单元，以获得关于铁磁测试样品（10）的材料表面中的缺陷（12,14）的重要细节。

    INHOMOGENEITY DETECTION SYSTEM
    56.
    发明公开
    INHOMOGENEITY DETECTION SYSTEM 失效
    非均质检测系统

    公开(公告)号：EP0422131A4

    公开(公告)日：1991-10-16

    申请号：EP89909295

    申请日：1989-06-20

    申请人： ELECTRIC POWER RESEARCH INSTITUTE, INC

    发明人： NAKATA, ROY ,  RABINOWITZ, MARIO ,  NOTTINGHAM, LAWRENCE, D.

    IPC分类号： G01R33/035 ,  G01N27/82 ,  G01N27/83 ,  G01R33/10 ,  G01N27/87

    CPC分类号： G01N27/82 ,  G01R33/10

    摘要： Utilizing an array (50) of SQUID detectors to map the magnetic field associated with test currents flowing in the component (20) to be tested. The SQUID is an ultrasensitive, miniature device that transduces a faint magnetic field to a measurable voltage. Perturbation occurs in the test currents and the associated magnetic field at physical defects or inhomogeneities. In the preferred embodiment, multi-dimensional test currents are injected into the component (20) being tested; the injection being made between specific electrodes (30) and (32) (of a matrix of electrodes) by varying the direction of the defect to maximize and amplify the effect of the perturbation.

    IN-LINE DEVICE FOR DETECTING MECHANICAL STRESSES IN A PIPELINE
    57.
    发明公开
    IN-LINE DEVICE FOR DETECTING MECHANICAL STRESSES IN A PIPELINE 审中-实审

    公开(公告)号：EP4390387A1

    公开(公告)日：2024-06-26

    申请号：EP22884151.6

    申请日：2022-10-11

    申请人： Kolesnikov, Igor Sergeevich

    发明人： Kolesnikov, Igor Sergeevich

    IPC分类号： G01N27/87

    CPC分类号： G01N27/87

    摘要： The in-line device for determining mechanical stresses in pipelines is designed to move within the pipeline. The device features a cylindrical body that houses at least two coaxially positioned non-ferromagnetic disks. These disks are rigidly connected and arranged at a distance L. The device also includes at least four probes with 3D gradiometer sensors capable of scanning the inner pipe surface using the magnetic gradient tomography (MTM-G) method. The probes are rigidly fixed and coaxially positioned within the cylindrical body on the aforementioned disks, enabling scanning in three mutually perpendicular planes within the pipe space.