公开(公告)号：US08490492B2

公开(公告)日：2013-07-23

申请号：US12673883

申请日：2008-07-11

Applicant: Andreas Groos ,  Stefan Nitsche

Inventor： Andreas Groos ,  Stefan Nitsche

IPC: G01N29/04

CPC classification number: G01N29/048 ,  G01B21/08 ,  G01B21/10 ,  G01N29/07 ,  G01N29/4436 ,  G01N2291/2634 ,  G01N2291/2636

Abstract: 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.

Abstract translation: 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。

公开(公告)号：US20110238369A1

公开(公告)日：2011-09-29

申请号：US13132448

申请日：2009-11-27

Applicant: Andreas Groos ,  Stefan Nitsche

Inventor： Andreas Groos ,  Stefan Nitsche

IPC: G01B21/10 ,  G06F15/00

CPC classification number: G01B21/14 ,  G01B21/20 ,  G06F17/5009 ,  G06T17/10 ,  G06T19/00

Abstract: The invention relates to a method for testing the driftability of metal tubes, wherein a cylindrical drift body having a defined diameter and a defined length is guided through the tube with defined force for ensuring a predetermined internal diameter and a minimum straightness. Virtual drifting is hereby performed instead of the physical drift operation.

Abstract translation: 本发明涉及一种用于测试金属管的漂移性的方法，其中具有限定直径和限定长度的圆柱形漂移体以限定的力被引导通过管，以确保预定的内径和最小的平直度。 由此进行虚拟漂移而不是物理漂移操作。

公开(公告)号：US07783432B2

公开(公告)日：2010-08-24

申请号：US11997065

申请日：2006-07-28

Applicant: Thomas Orth ,  Stefan Nitsche ,  Till Schmitte

Inventor： Thomas Orth ,  Stefan Nitsche ,  Till Schmitte

IPC: G01B5/28 ,  G01N27/82

CPC classification number: G01N27/9026 ,  G01N27/82

Abstract: 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.

Abstract translation: 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。

公开(公告)号：US07779693B2

公开(公告)日：2010-08-24

申请号：US11997043

申请日：2006-07-28

Applicant: Thomas Orth ,  Stefan Nitsche ,  Till Schmitte

Inventor： Thomas Orth ,  Stefan Nitsche ,  Till Schmitte

IPC: G01N29/00

CPC classification number: G01N29/041 ,  G01N29/11 ,  G01N29/2412 ,  G01N29/4427 ,  G01N29/46 ,  G01N2291/044 ,  G01N2291/2634

Abstract: A method for nondestructive testing of the pipes for detecting surface flaws is disclosed. With of the method, flaws can be detected and analyzed in near-real-time while the pipe is produced. The data obtained by ultrasound sensors are digitized in a time window following a trigger pulse, and the digitized data are processed in a digital processor, for example a DSP, using wavelet transforms. The evaluated quantity is compared with a reference value, wherein a determined flaw-based signal can be uniquely associated with the flaw located on the pipe surface.

Abstract translation: 公开了一种用于检测表面缺陷的管道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。 通过超声波传感器获得的数据在触发脉冲之后的时间窗中被数字化，并且使用小波变换在数字处理器（例如DSP）中处理数字化数据。 将评估的量与参考值进行比较，其中确定的基于缺陷的信号可以与位于管表面上的缺陷唯一地相关联。

公开(公告)号：US20080228412A1

公开(公告)日：2008-09-18

申请号：US11997065

申请日：2006-07-28

Applicant: Thomas Orth ,  Stefan Nitsche ,  Till Schmitte

Inventor： Thomas Orth ,  Stefan Nitsche ,  Till Schmitte

IPC: G01N27/87

CPC classification number: G01N27/9026 ,  G01N27/82

Abstract: 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.

Abstract translation: 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。

公开(公告)号：US20130131856A1

公开(公告)日：2013-05-23

申请号：US13700741

申请日：2011-05-30

Applicant: Stefan Nitsche ,  Andreas Groos ,  Xiaoxing Guo ,  Nicolas Nourrit ,  Alejandra Segura

Inventor： Stefan Nitsche ,  Andreas Groos ,  Xiaoxing Guo ,  Nicolas Nourrit ,  Alejandra Segura

IPC: G06F17/50

CPC classification number: G06F17/50 ,  G01B11/105 ,  G01B17/02 ,  G01N29/043 ,  G01N29/28 ,  G01N29/30 ,  G01N2291/2634

Abstract: A device for checking steel pipes during production and to a method using the device. The device includes a station for acquiring measurement data representative of physical measurements of the geometry of a pipe taken on an outside thereof, and a computer system configured to store template data applicable in a coordinate system and representative of overall geometry of a sizing body. In a chosen coordinate system, the system then provides a three-dimensional representation of parts of the pipe. For each part of the pipe, the system is referenced to determine a critical parameter, representative of the margin of passage of the sizing body inside a chosen part of the pipe. The method and device may thus establish a diagnostic of traversability of the pipe by a sizing body.

Abstract translation: 在生产期间检查钢管的装置以及使用该装置的方法。 该装置包括用于获取表示在其外部拍摄的管的几何形状的物理测量的测量数据的站，以及被配置为存储可应用于坐标系中并表示尺寸体的整体几何形状的模板数据的计算机系统。 在所选择的坐标系中，系统提供管道部分的三维表示。 对于管道的每个部分，参考系统来确定关键参数，代表在选定部分管道内的上浆体通过边缘的关键参数。 因此，该方法和装置可以建立通过施胶体对管道的横向性的诊断。

公开(公告)号：US20120098532A1

公开(公告)日：2012-04-26

申请号：US13131454

申请日：2009-11-18

Applicant: Michael Kaack ,  Stefan Nitsche ,  André Germes

Inventor： Michael Kaack ,  Stefan Nitsche ,  André Germes

IPC: G01R33/07 ,  G01R33/02

CPC classification number: G01R33/1215 ,  G01N27/87

Abstract: The invention relates to a method for the automated measurement of the residual magnetic field strength of magnetized ferromagnetic workpieces, especially steel tubes, the residual magnetic field exiting the face of the tube end being measured by means of a measuring probe. Instead of directly measuring the residual field strength on the face, the curve of at least one magnetic field component is measured on the outer surface of the tube at least in the region of the tube ends and beyond the tube ends and the residual field strength on the face is inferred on the basis of the previously determined correlations between the residual field strength measured on the face and on the tube surface.

Abstract translation: 本发明涉及一种用于自动测量磁化铁磁性工件，特别是钢管的残余磁场强度的方法，通过测量探头测量离开管端面的剩余磁场。 代替直接测量面上的残余场强，至少在管的外表面上测量至少一个磁场分量的曲线，该曲线至少在管末端的区域中并超过管端，残余场强度 基于在面上和管表面上测量的残余磁场强度之间先前确定的相关性来推断该面。

公开(公告)号：US20110268343A1

公开(公告)日：2011-11-03

申请号：US12992710

申请日：2009-04-02

Applicant: Andreas Groos ,  Stefan Nitsche

Inventor： Andreas Groos ,  Stefan Nitsche

IPC: G06K9/00 ,  G01R33/12

CPC classification number: G01N27/87

Abstract: 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.

Abstract translation: 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。

公开(公告)号：US07728586B2

公开(公告)日：2010-06-01

申请号：US11631743

申请日：2005-06-10

Applicant: Michael Kaack ,  Stefan Nitsche ,  Thomas Orth

Inventor： Michael Kaack ,  Stefan Nitsche ,  Thomas Orth

IPC: G01N27/82 ,  G01R33/12

CPC classification number: G01N27/87

Abstract: The present invention pertains to a method for the nondestructive testing of pipes made of ferromagnetic steel by means of a stray flux, in which the pipe, which is moving in the longitudinal direction and alternatively additionally rotating, is magnetized by a constant field, and the generated magnetic flux is transmitted into the pipe in a contactless manner, and the flaws that are located in the near-surface area of the outer or inner surface of the pipe bring about magnetic stray fluxes, which emerge from the pipe surface and are detected by means of sensors. The amplitudes, preferably of the horizontal field component of the magnetic stray flux, which vary in the vertical direction, are detected, on the one hand, at a near-surface distance from the pipe outer surface, and, on the other hand, at a distance lying further remotely therefrom, and the detected signals are related to one another.

Abstract translation: 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进行非破坏性测试的方法，其中沿着纵向方向移动并另外旋转的管被恒定磁场磁化，并且 产生的磁通以无接触的方式传递到管中，并且位于管的外表面或内表面的近表面区域中的缺陷产生从管表面出现并由管表面检测的磁性杂散磁通 传感器手段 一方面，检测在垂直方向上变化的磁性杂散磁通的水平场分量的幅度，一方面与管外表面的近表面距离，另一方面，在 距离更远的距离，并且检测到的信号彼此相关。

公开(公告)号：US20080210010A1

公开(公告)日：2008-09-04

申请号：US11997043

申请日：2006-07-28

Applicant: Thomas Orth ,  Stefan Nitsche ,  Till Schmitte

Inventor： Thomas Orth ,  Stefan Nitsche ,  Till Schmitte

IPC: G01N29/00

CPC classification number: G01N29/041 ,  G01N29/11 ,  G01N29/2412 ,  G01N29/4427 ,  G01N29/46 ,  G01N2291/044 ,  G01N2291/2634

Abstract: A method for nondestructive testing of the pipes for detecting surface flaws is disclosed. With of the method, flaws can be detected and analyzed in near-real-time while the pipe is produced. The data obtained by ultrasound sensors are digitized in a time window following a trigger pulse, and the digitized data are processed in a digital processor, for example a DSP, using wavelet transforms. The evaluated quantity is compared with a reference value, wherein a determined flaw-based signal can be uniquely associated with the flaw located on the pipe surface.

Abstract translation: 公开了一种用于检测表面缺陷的管道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。 通过超声波传感器获得的数据在触发脉冲之后的时间窗中被数字化，并且使用小波变换在数字处理器（例如DSP）中处理数字化数据。 将评估的量与参考值进行比较，其中确定的基于缺陷的信号可以与位于管表面上的缺陷唯一地相关联。