公开(公告)号：EP3047264A1

公开(公告)日：2016-07-27

申请号：EP14781058.4

申请日：2014-09-16

申请人： Rosen Swiss AG

发明人： MOLENDA, Daniel ,  THALE, Werner ,  REINING, Bernhard

IPC分类号： G01N27/72 ,  G01N27/90

CPC分类号： G01N27/80 ,  G01N27/025 ,  G01N27/72 ,  G01N27/9006 ,  G01N27/9033

摘要： The invention relates to a method for determining a mechanical-technological characteristic value of ferromagnetic metals, preferably ferromagnetic steels and in particular fine-grained steels, which are used in pipelines, wherein a magnetizing device having at least one permanent magnet or electromagnet (17) magnetizes the metal to be determined and a sensor device (11) comprising a transmitting coil (24) produces a magnetic field, which interacts with the magnetic field produced in the metal by the magnetizing device and produces an eddy current, wherein the eddy current is produced in the magnetically at least substantially saturated metal and the eddy current is measured by an eddy-current sensor of the sensor device (11), wherein a magnetic-field-strength sensor (12) measures the magnetic field of the metal at least close to the surface, and wherein, by means of an evaluating device (43), the electrical conductivity or the specific resistance of the metal is determined from the data of the eddy-current sensor on the basis of reference data and the characteristic value of the metal is derived from the conductivity or the resistance. The invention further relates to an inspection pig for performing such a method.

公开(公告)号：EP1986002B1

公开(公告)日：2015-11-11

申请号：EP08154820.8

申请日：2008-04-18

申请人： SNECMA

发明人： Briffa, Patrick ,  Cabanis, Patrick ,  Gaison, Patrick ,  Ravize, Luc

IPC分类号： G01N27/90 ,  F01D25/28

CPC分类号： G01N27/9006 ,  F01D25/285 ,  F05D2260/80

公开(公告)号：EP2435822A4

公开(公告)日：2015-01-21

申请号：EP09845325

申请日：2009-07-01

申请人： LIEVYI SERGII ,  AGALIDI YURIY ,  SHUMSKY IVAN

发明人： LIEVYI SERGII ,  AGALIDI YURIY ,  SHUMSKY IVAN

IPC分类号： G01N27/90

CPC分类号： G01N27/9006

摘要： Inductor of eddy currents for magnetic tape testing comprises of a nonferromagnetic dielectric supporting element (1) having a longitudinal groove in the operational butt end, an exciting conductor (2) shaped as wire segment and placed within said groove of said supporting element (1), and a suitable means (3) for connection of said conductor (2) to a source (4) of pulse current. Scanner for magnetic tape testing comprises of a rigid body (9); aforesaid inductor of eddy currents as such and the source (4) of pulse current, which are mounted on said body (9). These closely coupled devices have heightened sensitivity to the surface defects in electroconductive (especially nonferromagnetic) articles and secure high resolving capacity of magnetic tape testing.

公开(公告)号：EP2734837A1

公开(公告)日：2014-05-28

申请号：EP12743940.4

申请日：2012-07-18

申请人： Institut Dr. Foerster GmbH & Co. KG

发明人： HOLZMAYER, Bernhard ,  HALTER, Michael

IPC分类号： G01N27/90 ,  G01N29/36

CPC分类号： H03M1/60 ,  G01N27/9006

摘要： The invention relates to a method for testing the material of a test object (8) in a nondestructive manner, said test object being moved relative to a probe (1) at a variable relative speed. The method has the following steps: detecting a probe signal (US) using the probe (1); converting the probe signal (US) from analog to digital in order to generate a digitized probe signal (USD) in the form of a sequence of digital words with a specified, in particular constant, word repetition frequency; decimating the word repetition frequency of the digitized probe signal (USD) or a digital demodulation signal (UM) derived from the digitized probe signal in n stages using n cascaded decimating stages (5_1 to 5_n), wherein n ≥ 2; selecting an output signal (UA_1 to UA_n) of one of the n decimating stages (5_1 to 5_n) dependent on the current relative speed; and filtering the selected output signal using a digital filter (7) that is clocked at the word repetition frequency of the selected output signal.

公开(公告)号：EP1952135A2

公开(公告)日：2008-08-06

申请号：EP06846220.9

申请日：2006-11-03

申请人： The Clock Spring Company L.P.

发明人： CROUCH, Alfred, E. ,  GOYEN, Todd ,  PORTER, Patrick, C. ,  LAUGHLIN, Shawn

IPC分类号： G01N27/22

CPC分类号： G01N27/9006 ,  G01N27/904

摘要： A system (10) for mapping a surface defect (20) in an electrically-conducting material (22) by measuring a change in the resonance of the material (22) includes a flexible printed circuit board (30) and a two dimensional array of transducers printed on the flexible circuit board, wherein each element of the array includes two transducer coils (34) in a paired arrangement. A receive circuit connected to the coils is tuned to a resonant frequency, and the transducer coils (34) operate in a send/receive mode. In another feature of the invention, there are means (12, 14, 16) for converting a change in measured resonance to a visual display of the depth and width of the surface defect (20).

公开(公告)号：EP1176420A3

公开(公告)日：2004-04-07

申请号：EP01306415.9

申请日：2001-07-26

申请人： GENERAL ELECTRIC COMPANY

发明人： Nath, Shridhar Champaknath ,  Rose, Curtis Wayne ,  Batzinger, Thomas James ,  Stryjek, Paul Peter

IPC分类号： G01N27/90

CPC分类号： G01N27/9006

摘要： A method of inspecting a preselected area (16) of an electrically conductive component (10) to determine whether flaws (14) are present. The method includes the steps of permanently mounting an eddy current element (22) on the component (10) over the preselected area (16) and energizing the element (22) to generate alternating magnetic fields proximate the component (10). An electrical signal generated by a secondary magnetic field formed proximate the component (10) is detected using the element (22) and the detected electrical signal is compared to a reference signal to determine whether the detected signal is different than the reference signal. Differences indicate the presence of a flaw (14) in the component (10). Inspection apparatus (12) for performing this method is also disclosed.

公开(公告)号：EP1209463A3

公开(公告)日：2002-07-10

申请号：EP01309820.7

申请日：2001-11-22

申请人： Dinsley Devices Limited

发明人： Owston, Charles Neville

IPC分类号： G01N27/90 ,  G01N17/00

CPC分类号： G01N17/006 ,  G01N27/9006

摘要： A method and apparatus (1) for detecting corrosion of lighting columns (2) is disclosed. A drive coil assembly (4) applies a varying magnetic field to the lighting column (2) to induce varying eddy currents in the column (2), and a magnetic field caused by the varying eddy currents in the column (2) is detected by means of a detector coil (5).

公开(公告)号：EP1176420A2

公开(公告)日：2002-01-30

申请号：EP01306415.9

申请日：2001-07-26

申请人： GENERAL ELECTRIC COMPANY

发明人： Nath, Shridhar Champaknath ,  Rose, Curtis Wayne ,  Batzinger, Thomas James ,  Stryjek, Paul Peter

IPC分类号： G01N27/90

CPC分类号： G01N27/9006

摘要： A method of inspecting a preselected area (16) of an electrically conductive component (10) to determine whether flaws (14) are present. The method includes the steps of permanently mounting an eddy current element (22) on the component (10) over the preselected area (16) and energizing the element (22) to generate alternating magnetic fields proximate the component (10). An electrical signal generated by a secondary magnetic field formed proximate the component (10) is detected using the element (22) and the detected electrical signal is compared to a reference signal to determine whether the detected signal is different than the reference signal. Differences indicate the presence of a flaw (14) in the component (10). Inspection apparatus (12) for performing this method is also disclosed.

摘要翻译： 检查导电部件（10）的预选区域（16）以确定是否存在缺陷（14）的方法。 该方法包括以下步骤：在预选区域（16）上将涡流元件（22）永久地安装在部件（10）上，并激励元件（22），以产生接近部件（10）的交变磁场。 使用元件（22）检测由靠近部件（10）形成的次级磁场产生的电信号，并将检测到的电信号与参考信号进行比较，以确定检测到的信号是否不同于参考信号。 差异表明组分（10）中存在缺陷（14）。 还公开了用于执行该方法的检查装置（12）。

公开(公告)号：EP0078672B1

公开(公告)日：1986-10-08

申请号：EP82305748.4

申请日：1982-10-28

申请人： LTV Steel Company, Inc.

发明人： Harris, Richard M.

IPC分类号： G01N27/90

CPC分类号： G01N27/9006 ,  Y10S165/903

公开(公告)号：EP0088069A1

公开(公告)日：1983-09-07

申请号：EP83890013.2

申请日：1983-02-03

申请人： VOEST-ALPINE Aktiengesellschaft

发明人：

IPC分类号： G01N27/82 ,  G01N27/90

CPC分类号： G01N27/9006 ,  G01N27/82

摘要： Um Fehler im Stahlgut (1) mit großer Sicherheit zu erkennen, wobei ein Energieverlust durch Erkaltenlassen des Stahtgutes (1) und anschließendes Wiederaufheizen vermieden wird, wird nur eine dünne Oberflächenschicht (8) des Stahlgutes (1) an der zu prüfenden Oberfläche (7) auf eine Temperatur unterhalb des Curie-Punktes intensiv abgekühlt, während der Kern (8') des Stahlgutes (1) heiß bleibt, worauf unmittelbar danach in der abgekühlten Oberflächenschicht (8) ein magnetisches oder elektromagnetisches Feld induziert wird und durch Fehlstellen, insbesondere Risse, im Stahlgut (1) verursachte Beeinflussungen des induzierten Feldes mittels Aufnehmer festgestellt und aufgezeichnet werden.

摘要翻译： 到由于电力损失冷却，钢材料（1）和随后的再加热，避免以极大的确定性来检测在钢材料（1）的错误，只有薄的表面层（8）的钢材（1）的表面上的要被测试（7） 集中冷却到居里点以下的温度，而钢材料（1）的芯（8“）的温度仍然很高，然后在其后立即磁场或电磁场中的冷却的表面层（8）和由缺陷引起的，特别是破解， 在钢材料（1）造成的影响的感应场是由换能器检测并记录。