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    • 3. 发明申请
    • METHOD FOR THE NONDESTRUCTIVE TESTING OF PIPES
    • 管道非结构试验方法
    • US20110268343A1
    • 2011-11-03
    • US12992710
    • 2009-04-02
    • Andreas GroosStefan Nitsche
    • Andreas GroosStefan Nitsche
    • G06K9/00G01R33/12
    • G01N27/87
    • The invention relates to a method for the nondestructive testing of pipes made of ferromagnetic steel for flaws by means of stray flux, wherein the pipe is magnetized by a constant field and the discontinuities present in the near-surface region of the outer or inner surface of the pipe cause magnetic stray fluxes, which exit the pipe surface and are 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 external or internal flaw via defined flaw thresholds respectively. To this end, prior to associating the detected amplitude signals to 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 via a previously determined correction factor for amplitudes and/or frequencies of a perpendicular angular position.
    • 本发明涉及一种用于通过杂散焊剂对由铁磁性钢制成的管道进行非破坏性测试的方法,其中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不连续性 该管道引起磁性杂散通量,其离开管表面并由每个用于纵向和/或横向缺陷测试的测试单元的探针检测,其中检测到的振幅信号的关联基于振幅高度和/ 或相对于外部或内部缺陷的频谱分别通过限定的缺陷阈值。 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,确定缺陷相对于各个磁场方向的角位置,并且经由预先确定的校正因子来执行信号的校正 垂直角位置的幅度和/或频率。
    • 4. 发明授权
    • Method for the nondestructive testing of pipes
    • 管道无损检测方法
    • US08552718B2
    • 2013-10-08
    • US12992710
    • 2009-04-02
    • Andreas GroosStefan Nitsche
    • Andreas GroosStefan Nitsche
    • G01N27/82G06K9/00
    • G01N27/87
    • In a method for the nondestructive testing of pipes made of ferromagnetic steel for flaws by means of stray flux, the pipe is magnetized by a constant field and the discontinuities in the near-surface region of the outer or inner surface of the pipe cause magnetic stray fluxes, which exit the pipe surface and are detected by probes of a test unit, 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 external or internal flaw via defined flaw thresholds respectively. For this, prior to associating the detected amplitude signals to 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 via a previously determined correction factor for amplitudes and/or frequencies of a perpendicular angular position.
    • 在通过杂散磁通对由铁磁钢制成的管道进行非破坏性测试的方法中,管道被恒定磁场磁化,并且管道的外表面或内表面的近表面区域中的不连续性导致磁性杂散 通过测试单元的探头离开管道表面并通过测试单元的探测器检测到的通量,其中检测到的振幅信号的关联基于通过限定的外部或内部缺陷的振幅高度和/或频谱来执行 缺陷阈值。 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,确定缺陷相对于各个磁场方向的角位置,并且通过预先确定的振幅校正因子来执行信号的校正 和/或垂直角位置的频率。
    • 6. 发明申请
    • METHOD FOR NONDESTRUCTIVE TESTING OF PIPES
    • 管道非结构试验方法
    • US20120125111A1
    • 2012-05-24
    • US12673883
    • 2008-07-11
    • Andreas GroosStefan Nitsche
    • Andreas GroosStefan Nitsche
    • G01N29/04
    • G01N29/048G01B21/08G01B21/10G01N29/07G01N29/4436G01N2291/2634G01N2291/2636
    • The invention relates to a process for the destruction-free testing of metallic pipes, in particular seamlessly produced steel pipes, in which method the entire length of the pipe is scanned following the circumference precisely and in this case, in addition to the wall thickness (WD) and the external diameter (Da) being determined, the inner and outer surfaces of the pipe are examined for faults, the faults determined in this process are compared with a predefined permissible reference fault depth RFT (RFT=fault threshold of×% of the nominal wall thickness), the pipes are sent to reworking means if the fault threshold is exceeded, and a requisite minimum wall thickness (WDmin) has to be present in the reworked region after the processing has been carried out.For this purpose, the invention provides for the pipes containing faults to be released for reworking only when the determined geometrical parameters have been correlated with one another beforehand in an evaluation step, and the following conditions are met: WD−RFT>WDmin for faults on the inner and outer sides of the pipe and Da−RFT>Da min for faults on the outer side of the pipe.
    • 本发明涉及一种用于金属管,特别是无缝生产的钢管的无破坏测试方法,其中管道的整个长度在圆周上精确扫描,并且在这种情况下,除了壁厚( WD)和外径(Da),检查管道的内表面和外表面是否存在故障,将此过程中确定的故障与预定义的允许参考故障深度RFT(RFT =故障阈值为×% 如果超过了故障阈值,则将管道送到返工装置,并且在进行处理之后必须在返工区域中存在必要的最小壁厚(WDmin)。 为此,本发明提供了仅在确定的几何参数在评估步骤中预先相互关联并且满足以下条件的情况下,将包含要被释放的故障的管道包括在内才能进行再加工:WD-RFT> WDmin 管道的内侧和外侧以及Da-RFT> Da min,用于管道外侧的故障。
    • 7. 发明授权
    • Method for nondestructive testing of pipes
    • 管道无损检测方法
    • US08490492B2
    • 2013-07-23
    • US12673883
    • 2008-07-11
    • Andreas GroosStefan Nitsche
    • Andreas GroosStefan Nitsche
    • G01N29/04
    • G01N29/048G01B21/08G01B21/10G01N29/07G01N29/4436G01N2291/2634G01N2291/2636
    • The invention relates to a process for the destruction-free testing of metallic pipes, in particular seamlessly produced steel pipes, in which method the entire length of the pipe is scanned following the circumference precisely and in this case, in addition to the wall thickness (WD) and the external diameter (Da) being determined, the inner and outer surfaces of the pipe are examined for faults, the faults determined in this process are compared with a predefined permissible reference fault depth RFT (RFT=fault threshold of×% of the nominal wall thickness), the pipes are sent to reworking means if the fault threshold is exceeded, and a requisite minimum wall thickness (WDmin) has to be present in the reworked region after the processing has been carried out.For this purpose, the invention provides for the pipes containing faults to be released for reworking only when the determined geometrical parameters have been correlated with one another beforehand in an evaluation step, and the following conditions are met: WD−RFT>WDmin for faults on the inner and outer sides of the pipe and Da−RFT>Da min for faults on the outer side of the pipe.
    • 本发明涉及一种用于金属管,特别是无缝生产的钢管的无破坏测试方法,其中管道的整个长度在圆周上精确扫描,并且在这种情况下,除了壁厚( WD)和外径(Da),检查管道的内表面和外表面是否存在故障,将此过程中确定的故障与预定义的允许参考故障深度RFT(RFT =故障阈值为×% 如果超过了故障阈值,则将管道送到返工装置,并且在进行处理之后必须在返工区域中存在必要的最小壁厚(WDmin)。 为此,本发明提供了仅在确定的几何参数在评估步骤中预先相互关联并且满足以下条件的情况下,将包含要被释放的故障的管道包括在内才能进行再加工:WD-RFT> WDmin 管道的内侧和外侧以及Da-RFT> Da min,用于管道外侧的故障。
    • 10. 发明授权
    • Method for nondestructive testing of pipes for surface flaws
    • 表面缺陷管无损检测方法
    • US07783432B2
    • 2010-08-24
    • US11997065
    • 2006-07-28
    • Thomas OrthStefan NitscheTill Schmitte
    • Thomas OrthStefan NitscheTill Schmitte
    • G01B5/28G01N27/82
    • G01N27/9026G01N27/82
    • A method for nondestructive testing of the pipes for detecting surface flaws using magnetic leakage flux is disclosed. With of the method, flaws can be detected and analyzed in near-real-time while the pipe is produced. The data obtained with inductive coils, Hall sensors or GMR sensors are digitized, the digital data are buffered in a first memory, and a subset of the digital data are copied into a second memory. The copied data are transformed with a wavelet transformation and the resulting wavelet coefficients are filtered and/or modified. In an alternative embodiment, the digital data can be continuously supplied to a routine for wavelet transformation, which is performed using cascaded digital signal processing routines. The evaluated variable is compared with a reference value, wherein a determined flaw-based signal can be unambiguously associated with the position of the flaw.
    • 公开了一种用于使用漏磁通检测表面缺陷的管的非破坏性测试方法。 通过该方法,可以在生产管道时近距离地检测和分析缺陷。 使用感应线圈,霍尔传感器或GMR传感器获得的数据被数字化,数字数据被缓冲在第一存储器中,并且数字数据的子集被复制到第二存储器中。 复制的数据用小波变换进行变换,并且所得到的小波系数被过滤和/或修改。 在替代实施例中,可以将数字数据连续提供给使用级联数字信号处理程序执行的用于小波变换的例程。 将评估变量与参考值进行比较,其中确定的基于缺陷的信号可以明确地与缺陷的位置相关联。