Material Flaw Testing Patents (Class 324/238)
  • Patent number: 10451769
    Abstract: A method for transforming a 2D or 3D earth volume geometry into a 1D earth volume geometry includes performing a measurement using the measurement sensor in a wellbore. A layer boundary in the 2D or 3D earth volume geometry that is nearest to the measurement sensor is identified. A vector from the measurement sensor is generated toward the nearest layer boundary. A first intersection is identified between the vector and the nearest layer boundary, and a second intersection is identified between the vector and another layer boundary. Simulated boundaries that extend through the first and second intersections and are perpendicular to the vector are generated. The 1D earth volume geometry that is bounded by the first and second intersections is identified. A property value is extracted from the 2D or 3D earth volume geometry between the first and second intersections. The property value is assigned to the 1D earth geometry.
    Type: Grant
    Filed: January 25, 2016
    Date of Patent: October 22, 2019
    Assignee: SCHLUMBERGER TECHNOLOGY CORPORATION
    Inventors: John C. Rasmus, Christopher E. Morriss, Koji Ito, Hui Xie, Roger Griffiths, Shahzad A. Asif, David Maggs
  • Patent number: 10302593
    Abstract: A method for detecting the defect of the pipe includes the steps of: detecting a first parameter related to a magnetic induction intensity along a length direction of the pipe; determining whether the first parameter exceeds a predetermined threshold; determining a position at which the first parameter exceeds the predetermined threshold as the position of the defect of the pipe; and determining a degree of the defect of the pipe based on a numerical value of the first parameter exceeding the predetermined threshold. Through the detecting device, the defect in the pipe is decided based on parameters related to the magnetic induction intensity, the position of the defect of the pipe is determined according to a position at which the parameters are abnormal, and the degree of the defect of the pipe is determined according to numerical values of the parameters which are abnormal.
    Type: Grant
    Filed: June 12, 2016
    Date of Patent: May 28, 2019
    Assignee: NINGBO YINZHOU CITAL ELECTRONIC TECHNOLOGY CO., LTD.
    Inventors: Runqiao Yu, Bin Zhang, Bo Hu, Guisuo Xia, Dongfang Cheng, Qiangqiang Cheng
  • Patent number: 10082485
    Abstract: In a method for leakage flux testing of ferromagnetic material to be tested, in particular ferromagnetic pipes, for detecting defects, a testing volume of the material to be tested is magnetized by a constant magnetic field. A surface of the material to be tested is scanned by a probe arrangement for capturing magnetic leakage fields caused by defects. The probe arrangement has a probe array with a multiplicity of magnetic-field-sensitive probes arranged next to one another in a first direction and held at a finite testing distance from the surface of the material to be tested during the testing. Electrical probe signals are evaluated for qualifying the defects. Use is made of a probe arrangement in which the probes each have a probe width in the first direction which lies in the range from 20% of the testing distance up to 10 mm.
    Type: Grant
    Filed: May 4, 2015
    Date of Patent: September 25, 2018
    Assignee: Institut Dr. Foerster GmbH & Co. KG
    Inventors: Robert P. Uhlig, Friedrich Hecker
  • Patent number: 10060882
    Abstract: Testing methods and apparatus for testing the health of steel tubes used in reformers and other tubes and pipes used in other high temperature applications are provided. The method includes the steps of transmitting two sinusoidal electromagnetic signals, each having a different frequency F1 and F2, into the reformer tube, receiving a response signal, and analyzing the received response signal's intermodulation frequencies to determine the state of the steel reformer tube.
    Type: Grant
    Filed: December 10, 2013
    Date of Patent: August 28, 2018
    Assignee: ArcelorMittal
    Inventors: Michael Masleid, Zofia Niemczura, George Tsvik
  • Patent number: 9976987
    Abstract: A corrosion tracking system within an enclosure can include an electrical circuit through which a first current flows, where the first current creates a magnetic field. The system can also include a target component disposed proximate to the electrical circuit, where the magnetic field induces a number of second currents to flow within the target component. The system can further include a sensor that measures the plurality of second currents flowing within the target component to generate a plurality of measurements. The measurements can indicate whether the target component is experiencing corrosion.
    Type: Grant
    Filed: November 14, 2016
    Date of Patent: May 22, 2018
    Assignee: Cooper Technologies Company
    Inventors: Benjamin Avery Freer, Jesse Wade Taylor
  • Patent number: 9940702
    Abstract: This invention comprises a system and a method for inspecting the inside of delayed petroleum coking vessels to identify deformations, detect and determine the severity of other defects, and visually observe the inside of the inspected vessel.
    Type: Grant
    Filed: December 19, 2016
    Date of Patent: April 10, 2018
    Assignee: Custom Industrial Automation Inc.
    Inventors: Richard D. Clark, Daryl K. Rutt, John David Stratton
  • Patent number: 9695642
    Abstract: A drilling system is disclosed. The drilling system includes a drill string and a drill tool coupled to the drill string. The drill tool includes a cylindrical body. The drill tool further includes a plurality of blades on exterior portions of the cylindrical body. Additionally, the drill tool includes an instrumented cutting element on one of the plurality of blades. The instrumented cutting element includes a cutting table and a substrate coupled to the cutting table. The substrate includes a cavity. The instrumented cutting element further includes a core in the cavity and an electrical connector coupled to the substrate. The instrumented cutting element further includes a coil wire coupled to the electrical connector and surrounding portions of the core. The coil wire is configured to generate a signal in response to the instrumented cutting element being proximate to a magnetizable material.
    Type: Grant
    Filed: November 12, 2013
    Date of Patent: July 4, 2017
    Assignee: Halliburton Energy Services, Inc.
    Inventor: Richard Thomas Hay
  • Patent number: 9651702
    Abstract: A coil arrangement for a magnetic sensor for detecting metallic objects in a subgrade, in particular structures made of concrete, brick, and wood, as well as a method for energizing and reading out this coil arrangement, is disclosed. The coil arrangement includes one or preferably two stacked outer main coils via which a perpendicular magnetomotive force of the subgrade is effected. Provided within the outer main coil(s) is, on the one hand, a quartet of a total of two pairs of parallel coils lying symmetrical to the axis of the main coil(s), via which a magnetomotive force penetration of the subgrade in two directions parallel to the subgrade surface is possible. To further improve the accuracy and reliability of localizing objects and estimating depth of cover, two pairs of smaller orthogonal coils each opposite from one another and also arranged symmetrically to the axis of the main coil(s) are provided.
    Type: Grant
    Filed: February 26, 2010
    Date of Patent: May 16, 2017
    Assignee: Hilti Aktiengesellschaft
    Inventors: Torsten Gogolla, Christoph Wuersch, Andreas John
  • Patent number: 9546982
    Abstract: Testing methods and apparatus for testing the health of steel tubes used in reformers and other tubes and pipes used in other high temperature applications. The method includes the steps of transmitting two sinusoidal electromagnetic signals, each having a different frequency F1 and F2, into the reformer tube, receiving a response signal, and analyzing the received response signal's intermodulation frequencies to determine the state of the steel reformer tube.
    Type: Grant
    Filed: December 10, 2013
    Date of Patent: January 17, 2017
    Assignee: ArcelorMittal
    Inventors: Michael A. Masleid, Zofia E. Niemczura, George B. Tsvik
  • Patent number: 9170235
    Abstract: An eddy current testing apparatus includes: an eddy current testing probe having an eddy current testing coil arranged on a bottom portion of a casing; a pressing mechanism configured to press the eddy current testing probe so that the bottom portion of the eddy current testing probe is placed in contact with a part of an inner wall surface of a slot formed in an object to be inspected; a carriage configured to mount the pressing mechanism and the eddy current testing probe, the carriage traveling in a depth direction of the slot; and an eddy current testing control device configured to control defect detection for the inner wall surface of the slot by acquiring a detected eddy current signal from the eddy current testing coil.
    Type: Grant
    Filed: November 14, 2013
    Date of Patent: October 27, 2015
    Assignee: Hitachi, Ltd.
    Inventors: Akira Nishimizu, Atsushi Ishihara, Jun Matsumoto, Takayuki Kawanaka
  • Patent number: 9103801
    Abstract: In a defect detection device for a turbine rotor blade, a recess is provided in a side surface of a web provided to the inner circumferential side of a stationary blade diaphragm where stationary blades are annularly arranged adjacent to turbine rotor blades. An eddy current probe is movably installed in the recess, and a rod provided with a signal line for transmitting a signal detected by the eddy current probe, connected to the eddy current prove, is set up to be movable through a hole in a turbine casing and an air gap formed in the stationary blade diaphragm. The eddy current probe is moved toward or away from the turbine rotor blade implanting portion, and a data analyzer determines the condition of a defect occurred in the turbine rotor blade implanting portion based on the signals detected by the eddy current probe.
    Type: Grant
    Filed: October 14, 2008
    Date of Patent: August 11, 2015
    Assignee: Mitsubishi Hitachi Power Systems, Ltd.
    Inventors: Atsuya Hirano, Akira Nishimizu, Takeshi Kudo
  • Patent number: 9103798
    Abstract: A magnetic inspection device and method for nondestructive testing of wire ropes and the like utilizes a leakage flux generator moveable relative to a wire rope to be inspected for inducing in sections of the wire rope magnetic flux at a saturation level. A leakage flux detector moves with the leakage flux generator, and cooperates with the leakage flux generator for detecting leakage flux at the outer surface of the wire rope saturated by the generator. The detector provides a high fidelity signal representative of the loss of metallic cross section at individual locations along the wire rope. A signal processor receiving the high fidelity signal representative of the loss of metallic cross section from the detector extracts a wire rope roughness component from the high fidelity signal.
    Type: Grant
    Filed: July 26, 2012
    Date of Patent: August 11, 2015
    Assignee: NDT Technologies, Inc.
    Inventor: Herbert R. Weischedel
  • Patent number: 8981771
    Abstract: A method and apparatus for inspecting a metallic structure. A first signal is sent into a first location in the metallic structure and a second signal into a second location in the metallic structure at substantially a same time. A first response to the first signal is received. A second response to the second signal is received. The first response is compared with the second response to form a comparison. A determination is made as to whether an inconsistency is present using the comparison.
    Type: Grant
    Filed: June 3, 2011
    Date of Patent: March 17, 2015
    Assignee: The Boeing Company
    Inventors: Jeffrey G. Thompson, Gary E. Georgeson
  • Publication number: 20150061659
    Abstract: The invention concerns a structural integrity assessment system and method for determining stress concentration zones in a structure, such as a pipeline. The invention comprises a magnetic field sensor array arranged to be moved relative to the structure in a known direction. A controller is provided for recording one or more magnetic field readings taken by the magnetic field sensor array at different locations in the direction of movement thereof. A processor is arranged to identify one or more feature within said values, said feature being indicative of a region of reduced structural integrity in the structure. The processor also receives a data input for a further parameter corresponding to the location of the sensor array and compares the feature with the further parameter in order to verify that said feature corresponds to a region of reduced structural integrity for the structure.
    Type: Application
    Filed: March 1, 2013
    Publication date: March 5, 2015
    Applicant: SPEIR HUNTER LTD.
    Inventors: Steven Freear, Ben Varcoe, David Matthew Joseph Cowell, Stephen George Henry Staples, Chau Vo
  • Publication number: 20150054501
    Abstract: A method of inspecting a component (1) on the basis of Barkhausen noises in which a plurality of Barkhausen noise signals are processed, which have been or are determined at measurement positions (PS1, PS2, . . . , PS9) along the surface of the component (1) by a measuring device. According to the method, a computer forms a measurement matrix (M) from the Barkhausen noise signals, which matrix contains the Barkhausen noise signals detected as entries. A variety of characteristics are specified, each of which represents at least one cause of a manufacturing defect(s) of the component (1), each characteristic is associated with a processing procedure of the measurement matrix (M). The procedure is specific for the characteristic concerned. Finally, for each characteristic the measurement matrix (M) undergoes the associated processing procedure in which the intensity of the characteristic concerned is determined.
    Type: Application
    Filed: March 4, 2013
    Publication date: February 26, 2015
    Inventors: Oliver Bleicher, Herman Yakaria, Yiwen Xu
  • Patent number: 8960012
    Abstract: Yield stress is an important indicator of the strength of a component such as a pipe section. A method and apparatus for measuring yield stress of components made from magnetic materials is provided. The magnetic permeability of the material is recorded at multiple stress levels below yield establishing a permeability-stress relationship. The yield stress is then estimated as a function of the recorded permeability-stress relationship. The permeability stress relationship may be non-linear for a range of stress levels, achieving a peak permeability response for a stress below yield. The yield stress may be estimated as a multiple of the stress at which the peak permeability response is recorded.
    Type: Grant
    Filed: October 30, 2013
    Date of Patent: February 24, 2015
    Assignee: JENTEK Sensors, Inc.
    Inventors: Todd M. Dunford, Neil J. Goldfine, Shayan Haque
  • Patent number: 8941376
    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.
    Type: Grant
    Filed: November 18, 2009
    Date of Patent: January 27, 2015
    Assignee: Vallourec Deutschland GmbH
    Inventors: Michael Kaack, Stefan Nitsche, André Germes
  • Publication number: 20150008912
    Abstract: A method and a device detect mechanical changes in a component formed of a ferromagnetic material. The mechanical stress in the component is determined using at least one magnetoelastic sensor.
    Type: Application
    Filed: December 20, 2012
    Publication date: January 8, 2015
    Inventors: Carl Udo Maier, Jochen Ostermaier
  • Patent number: 8928316
    Abstract: Methods and apparatus for characterizing composite materials for manufacturing quality assurance (QA), periodic inspection during the useful life, or for forensic analysis/material testing. System are provided that relate eddy-current sensor responses to the fiber layup of a composite structure, the presence of impact damage on a composite structure with or without a metal liner, volumetric stress within the composite, fiber tow density, and other NDE inspection requirements. Also provided are systems that determine electromagnetic material properties and material dimensions of composite materials from capacitive sensor inspection measurements. These properties are related to the presence of buried defects in non-conductive composite materials, moisture ingress, aging of the material due to service or environmental/thermal exposure, or changes in manufacturing quality.
    Type: Grant
    Filed: November 16, 2011
    Date of Patent: January 6, 2015
    Assignee: JENTEK Sensors, Inc.
    Inventors: Neil J. Goldfine, Andrew P. Washabaugh, Robert Lyons, Zachary Thomas, David A. Jablonski, Christopher Martin
  • Patent number: 8928315
    Abstract: An insertion type eddy current flaw detection probe capable of more accurately detecting flaws in magnetic tubes is provided. A method for inspecting magnetic tubes for flaws with high accuracy is also provided. A eddy current flaw detection probe contains a cylindrical yoke (1), a plurality of detection coils (5) disposed around the central portion of the cylindrical yoke in the direction of a cylindrical axis thereof, first and second inner excitation coils (6) disposed on both sides of the plurality of detection coils in the direction of the cylindrical axis, and first and second permanent magnets (3, 4) disposed around the yoke on both sides of the first and second excitation coils in the direction of the cylindrical axis so that the direction of magnetizations thereof are parallel to the radial direction of the yoke and magnetic poles on the cylindrical yoke side thereof are different from each other.
    Type: Grant
    Filed: March 11, 2010
    Date of Patent: January 6, 2015
    Assignee: Sumitomo Chemical Company, Limited
    Inventors: Mitsuo Hashimoto, Hisakazu Mori, Hidehiko Suetsugu, Toyokazu Tada
  • Patent number: 8917090
    Abstract: A device for inspecting an annular sealing wiper extending at the surface of a bladed-wheel drum of a rotor. The device includes a carriage including at least two guide wheels and carrying a probe situated in a location such that, when the carriage is in position, the probe is positioned facing an edge of the wiper for inspection and at a determined distance therefrom.
    Type: Grant
    Filed: June 2, 2010
    Date of Patent: December 23, 2014
    Assignee: SNECMA
    Inventors: Sadia Bousquet, Gerard Derrien, Carolina Garcia-Lopez, Jean-Jacques Nedelec
  • Publication number: 20140347041
    Abstract: Provided is a defect inspection device of a steel plate. The defect inspection device according to the present invention includes a plurality of inspection units arranged in a width direction of the steel plate, wherein each of the plurality of inspection units includes a first magnetized pole and a second magnetized pole corresponding to each other. Also, the inspection unit includes: a magnetizing part generating a magnetic flux for magnetizing the steel plate in a direction inclined at a predetermined angle with respect to a rolling direction through the first magnetized pole and the second magnetized pole; and a detection part detecting a leakage flux that leaks due to defects existing in or on the steel plate by using the flux generated by the magnetizing part. Thus, the defects may be correctly detected through the defect inspection device.
    Type: Application
    Filed: November 30, 2012
    Publication date: November 27, 2014
    Inventors: Ju-Seung Lee, Se-Ho Choi, Sang-Woo Choi, Jong-Pil Yun, Shin-Hwan Kang, Ki-Jang Oh
  • Patent number: 8884613
    Abstract: A water-chamber working apparatus 1 according to the present invention includes a movable body that can move along a tube plate 12 of a steam generator 10, an extendable member 21 that extends and retracts in a direction in which a first coupling portion 21d approach each other and a direction in which these portions move away from each other, where the first coupling portion 21d is attached to a maintenance hatch 15 via a first joint 23a including two rotation axes intersecting with each other, and the second coupling portion 21e is attached to the movable body via a second joint 23b including two rotation axes intersecting with each other, which are different from the rotation axes of the first joint 23a.
    Type: Grant
    Filed: January 19, 2011
    Date of Patent: November 11, 2014
    Assignee: Mitsubishi Heavy Industries, Ltd.
    Inventor: Jun Fujita
  • Patent number: 8878527
    Abstract: A system for testing a magnetic sensor has a plurality of coils, wherein the coils are positioned along perpendicular planes. A magnetic field is generated along each of the perpendicular planes when a current is sent to each of the plurality of coils.
    Type: Grant
    Filed: November 29, 2010
    Date of Patent: November 4, 2014
    Assignee: Amkor Technology, Inc.
    Inventors: Raimondo Sessego, Gerard John, Pete Duchine
  • Patent number: 8866472
    Abstract: A device for detection of at least one defect in a concave or convex structure including an emitting part and a receiving part, in which the emitting part includes at least one current layer that makes it possible to create currents oriented approximately along a same direction as the defects whose influence is to be minimized and the receiving part includes at least one magnetic field receiver, added on or etched on a flexible support.
    Type: Grant
    Filed: July 28, 2010
    Date of Patent: October 21, 2014
    Assignees: Commissariat à l' énergie Atomique et aux énergies Alternatives, Institut de Radioprotection et de Surete Nucleaire
    Inventors: Jean-Marc Decitre, Olivier Casula, Gerard Cattiaux
  • Patent number: 8866471
    Abstract: A probe for eddy current monitoring of the surface of a circumferential slot formed in a turbojet disk. The probe includes a stem fastened to a support and a first multi-element sensor constrained to move with the stem and configured to be inserted into the circumferential slot to perform the inspection, and a second multi-element sensor. The two multi-element sensors are disposed back to back, and the stem of the probe is mounted to pivot about its own axis to enable the two multi-element sensors to be inserted in the slot.
    Type: Grant
    Filed: May 13, 2009
    Date of Patent: October 21, 2014
    Assignee: SNECMA
    Inventors: Patrick Cabanis, Sandra Cheynet, Patrick Gaisnon, Luc Ravize
  • Patent number: 8847586
    Abstract: A magnetic sensor inspection apparatus has a rectangular frame including a stage, a probe card, and a plurality of magnetic field generating coils. A wafer-like array of magnetic sensors is mounted on the stage, which is movable in horizontal and vertical directions. The probe card includes a plurality of probes which are brought into contact with a plurality of magnetic sensors encompassed in a measurement area. The magnetic field generating coils are driven to generate a magnetic field toward the stage. A plurality of magnetic field environment measuring sensors is arranged in the peripheral portion of the probe card surrounding the probes. A magnetic field controller controls magnetic fields generated by the magnetic field generating coils based on the measurement result of the magnetic field environment measuring sensors. Thus, it is possible to concurrently inspect a wafer-like array of magnetic sensors with the probe card.
    Type: Grant
    Filed: August 8, 2012
    Date of Patent: September 30, 2014
    Assignee: Yamaha Corporation
    Inventor: Takashi Suzuki
  • Patent number: 8841904
    Abstract: A probe for detecting distortions in a material includes a probe body, a ferrite core in the probe body, an excitation coil encircling the ferrite core and adapted to generate eddy currents, further magnetic shielding surrounding the excitation coil, and at least one giant magnetoresistive (GMR) sensor disposed in magnetic field-communicating relationship with the excitation coil and off-center with respect to the excitation coil's axis.
    Type: Grant
    Filed: February 17, 2011
    Date of Patent: September 23, 2014
    Assignee: The Boeing Company
    Inventors: Steven K. Brady, Donald D. Palmer, Jr., Jeffrey R. Kollgaard
  • Patent number: 8841902
    Abstract: A test set-up (10) for non-destructive detection of a flaw in a device being tested by means of an eddy current has an excitation coil (14), to which an excitation signal (SE) can be sent to act on the device being tested (16) with an electromagnetic alternating field, a receiving coil (17) to generate a coil signal (SP), which is a function of the flaw in the device being tested (16), an analog-digital converter (21), which is coupled to the receiving coil (17) on the input side, a filter arrangement (22), which is coupled to the analog-digital converter (21) on the input side and is designed for band-pass filtering and scan rate reduction, and a demodulator (27), which is coupled to an output of the filter arrangement (22) on the input side.
    Type: Grant
    Filed: July 13, 2012
    Date of Patent: September 23, 2014
    Assignee: Prüftechnik Dieter Busch AG
    Inventors: Heinrich Lysen, Werner Bräu
  • Patent number: 8823369
    Abstract: A non-destructive inspection system that has particular application for inspecting a bore in a valve for defects. The system includes an inspection yoke having a ferromagnetic core, where a first coil is wound around the core in one direction and a second coil is wound around the core in an orthogonal direction so that orthogonal electromagnetic fields can be generated within the bore. A controller provides a current flow through the coils to generate the electromagnetic fields to detect defects in the bore.
    Type: Grant
    Filed: May 17, 2011
    Date of Patent: September 2, 2014
    Assignee: Siemens Energy, Inc.
    Inventors: David S. Segletes, Erik A. Lombardo
  • Patent number: 8816681
    Abstract: In a method for detecting near-surface defects in a test sample consisting at least partly of a ferromagnetic material, a test volume of the test sample is magnetized and scanned for the detection of magnetic leakage fields caused by defects. The test volume is magnetized by means of a magnetic constant field and simultaneously by means of a magnetic alternating field superposed on the constant field. Leakage field test devices suitable for carrying out the method are described.
    Type: Grant
    Filed: March 25, 2009
    Date of Patent: August 26, 2014
    Assignee: Institut Dr. Foerster GmbH & Co. KG
    Inventor: Heinrich Braun
  • Patent number: 8797023
    Abstract: Provided is a coercive-force specifying apparatus capable of creating a demagnetization curve for each divisional area of a coercive-force distributed magnet without breaking the coercive-force distributed magnet and of specifying an average coercive force for each divisional area precisely. A coercive force specifying apparatus of the present invention includes: a yoke including an insertion space into which a coercive-force distributed magnet is to be inserted; a magnetizing coil; a search coil that detects a magnetization change when the magnetic field is applied to the coercive-force distributed magnet; and a tracer that creates a demagnetization curve on a basis of a voltage value generated due to the magnetization change. The end face is provided with two or more loop-shaped thread grooves bored therein, the search coil being provided in each thread groove.
    Type: Grant
    Filed: March 7, 2011
    Date of Patent: August 5, 2014
    Assignee: Toyota Jidosha Kabushiki Kaisha
    Inventors: Masafumi Suzuki, Tomonari Kogure, Mayumi Nakanishi
  • Patent number: 8789410
    Abstract: The device (18) for checking a tire (14) reinforcing thread comprises: an induction member (68, 70) that induces a magnetic flux (P1, P2; P) in the thread (42a-b; 100; 102), a support (67) supporting the induction member (68, 70) having the overall shape of a U and comprising legs (82, 84) that conduct the magnetic flux (P) into the thread (42a-b; 100; 102), the legs defining a direction of alignment of the device, at least one receiver member (74) that receives the magnetic flux (P1, P2; P) flowing through the thread (42a-b; 100; 102) situated between the legs (82, 84). The dimensions of the receiver member are designed so as to measure only the magnetic flux flowing through the thread (42a-b; 100; 102) when, in operation, the direction of alignment (18) is parallel to the thread (42a-b; 100; 102).
    Type: Grant
    Filed: December 28, 2009
    Date of Patent: July 29, 2014
    Assignees: Michelin Recherche et Technique S.A., Compagnie Generale des Etablissments Michelin
    Inventors: Thierry Dardelin, Patrice Alcalde, Jean-Marc Decitre, Olivier Casula
  • Patent number: 8773158
    Abstract: An inspection system is provided, which applies a forward or reverse voltage on a light-emitting device and measures a current thereof respectively before and after temperature rise, and determines whether the device fails according to the fact whether a current difference before and after the temperature rise is larger than a failure current determination value. Alternatively, the inspection system adopts a current applying device to apply a forward and reverse current on a light-emitting device and measures a voltage difference thereof respectively before and after temperature rise, and determines whether the device fails according to the fact whether a difference of the voltage differences before and after the temperature rise is larger than a failure voltage determination value. Alternatively, the inspection system adopts a predetermined inspecting step and a rapid inspecting step respectively to determine whether a light-emitting device fails.
    Type: Grant
    Filed: May 23, 2011
    Date of Patent: July 8, 2014
    Assignee: Industrial Technology Research Institute
    Inventors: Chien-Ping Wang, Shih-Chun Yang, Tzung-Te Chen, An-Tse Lee, Sheng-Bang Huang
  • Publication number: 20140167748
    Abstract: An apparatus and method for inspecting an elongate tubular member with an eddy current sensor inspection assembly including a bobbin is provided. The bobbin includes a shell defining a hollow interior and axially aligned openings at each end while supporting a sensor. A plurality of petals extend outwardly from the shell, and the petals are configured to position the bobbin concentrically within a tubular member as the bobbin is moved within the tubular member. The bobbin can be included in an inspection assembly with a probe head to support a sensor including at least one wire winding. A flexible shaft is connected to the probe head and transmits a motive force to move the probe head within the tubular member. The probe head includes a flexible tube, the bobbin supporting the sensor, and at least one centering bead mounted upon the flexible tube.
    Type: Application
    Filed: December 19, 2012
    Publication date: June 19, 2014
    Applicant: GENERAL ELECTRIC COMPANY
    Inventor: Jae Young Choi
  • Patent number: 8723513
    Abstract: The present invention discloses an eddy current probe and an eddy current inspection device including the eddy current probe for inspection of surface defect of a rotor wheel including a dovetail coupling part in which a hook is formed. The eddy current probe in accordance with an embodiment of the present invention includes: a main body, a contact part coupled to the main body and having a convex part and a concave part formed thereon corresponding to the hook, and an eddy current sensor being coupled to an end part of the convex part of the contact part. Accordingly, the detectability of a defect and the permeation depth can be enhanced, and the inspection procedures can be simplified.
    Type: Grant
    Filed: July 29, 2011
    Date of Patent: May 13, 2014
    Assignees: Korea Electric Power Corporation, Korea East-West Power Co., Ltd.
    Inventors: Yeon-Shik Ahn, Sang-Gi Park, Doo-Song Gil
  • Patent number: 8704512
    Abstract: A nondestructive testing system for testing the strength of a gear (15) that has been subjected to vacuum carburization is disclosed. A detection coil (33) embedded in a resin member (32) having a wedge-shaped cross section is placed in proximity to a bottom land (44) of the gear, and the carburized depth of the bottom land is measured to test the strength of the gear.
    Type: Grant
    Filed: March 17, 2009
    Date of Patent: April 22, 2014
    Assignee: Honda Motor Co., Ltd.
    Inventors: Yuzo Yamamoto, Ichiro Nagasawa
  • Patent number: 8680851
    Abstract: A facility for generating a detection signal upon the presence of metallic-conductive parts in a conveyed flow that is at least largely non-conductive, in which, for example, an alternating electromagnetic field is established in a section of the conveyed flow to be monitored by means of an alternating current generator and a transmitter coil system, whereby a variation of the signal of said field that is triggered by passage of a part is detected by a receiver coil system and converted into a detection signal by an analytical circuit. The individual components of the system are distributed over separate circuit modules which in turn act in concert by means of a bus system.
    Type: Grant
    Filed: April 22, 2009
    Date of Patent: March 25, 2014
    Assignee: Mesutronic Gerätebau GmbH
    Inventor: Manfred Artinger
  • Patent number: 8653810
    Abstract: A flexible printed circuit board (PCB) magnetostrictive (MS) sensor comprising a first direct current (DC) bias PCB layer comprising a first plurality of conductive traces, a first alternating current (AC) PCB layer disposed on the first DC bias PCB layer, the first AC PCB layer comprising a first AC coil, a pocket PCB layer disposed on the first AC PCB layer, the pocket PCB layer to receive a strip of MS material, a second AC PCB layer disposed on the pocket PCB layer, the second AC PCB layer comprising a second AC coil, and a second DC bias PCB layer disposed on the second AC PCB layer, the second DC bias PCB layer comprising a second plurality of conductive traces. The traces from the first plurality of conductive traces are electrically coupled to traces from the second plurality of conductive traces.
    Type: Grant
    Filed: September 19, 2011
    Date of Patent: February 18, 2014
    Assignee: Southwest Research Institute
    Inventors: Adam C. Cobb, Jonathan D. Bartlett, Charles E. Duffer
  • Patent number: 8593138
    Abstract: A bearing residual life prediction method, a bearing residual life diagnostic apparatus and a bearing diagnostic system can be provided. The bearing diagnostic system 20 includes: an eddy current tester 11 that measures the impedance X of a certain portion of a bearing 24 before and after the use of the bearing; a bearing information transmitter 30 that transmits bearing information s1 containing the impedance X; and a bearing information receiver 31 that receives the information; a diagnostic section 12 that obtains the residual life information s2 of the bearing 24 based on the received impedance X; and a life information transmitter 36 that transmits the residual life information s2; and a life information receiver 40 that receives the information. Hence, the bearing used by the user can be inspected nondestructively, and the residual life of the bearing can be predicted.
    Type: Grant
    Filed: December 16, 2010
    Date of Patent: November 26, 2013
    Assignee: NSK Ltd.
    Inventors: Tsuyoshi Nomura, Takamasa Ohira, Nobuaki Mitamura, Masahide Natori, Tohru Ueda, Ichiro Joko, Hidenobu Magami
  • Patent number: 8581578
    Abstract: A magnetic pattern detection device for use with a medium having at least one magnetic pattern of a plurality of types of magnetic patterns whose residual magnetic flux density and permeability are different on a basis of both of a level of residual magnetic flux density and a level of permeability may include a common sensor part structured to detect presence/absence of each of the plurality of types of magnetic patterns, and a signal processing section structured to extract a first signal corresponding to the level of the residual magnetic flux density and a second signal corresponding to the level of the permeability from a signal outputted from the sensor part.
    Type: Grant
    Filed: December 19, 2008
    Date of Patent: November 12, 2013
    Assignee: Nidec Sankyo Corporation
    Inventor: Shogo Momose
  • Patent number: 8581577
    Abstract: An inspection assembly for insertion inspection of an elongate hollow member. The inspection assembly includes a probe head including at least one sensor for sensing a characteristic of the elongate hollow member as the probe head is moved internally within the elongate hollow member. The assembly includes a flexible shaft connected to the probe head and transmitting a motive force to the probe head to move the probe head within the elongate hollow member. The flexible shaft encloses at least one wire operatively connected between the probe head and at least one component external to the elongate hollow member for sensory operation of the at least one sensor. The flexible shaft is at least partially corrugated.
    Type: Grant
    Filed: June 30, 2011
    Date of Patent: November 12, 2013
    Assignee: General Electric Company
    Inventors: Jeffrey Bishop Draper, Lance Edmund Maggy
  • Patent number: 8577626
    Abstract: Methods and systems for assessing fluid dynamics aspects of corrosion and shear stress in piping networks are provided. Shear stress hot spots of a piping network may be identified using non-dimensional transfer functions that have been developed for identifying the magnitude and location of these local maxima depending upon the geometrical parameters of commonly used components of piping networks, the fluid properties of the flow, and the operating conditions of the piping network. Upon identification of potential shear stress local maxima, piping network operators may monitor these locations for corrosion or other damage to prevent loss of integrity of the pipes.
    Type: Grant
    Filed: July 22, 2008
    Date of Patent: November 5, 2013
    Assignee: General Electric Company
    Inventors: Jitendra Kumar Gupta, Muralidharan Lakshmipathy, Yatin Tayalia
  • Patent number: 8552717
    Abstract: It is an object of the present invention to provide an eddy current testing apparatus capable of accurately detecting any flaws occurring in a columnar or cylindrical subject to be tested regardless of their extending directions, with the use of the same probe coil. The eddy current testing apparatus 100 according to the present invention comprises a spinning plate 1 and a probe coil 2 disposed on the spinning plate 1. The probe coil is a probe coil capable of obtaining a differential output about a scanning direction of a detection signal which corresponds to a detected eddy current induced in the subject to be tested. The spinning plate is disposed in such a position that a spinning center RC of the spinning plate faces with an axial center PC of the subject to be tested.
    Type: Grant
    Filed: March 17, 2008
    Date of Patent: October 8, 2013
    Assignee: Nippon Steel & Sumitomo Metal Corporation
    Inventors: Shigetoshi Hyodo, Yoshiyuki Nakao
  • Patent number: 8552718
    Abstract: 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.
    Type: Grant
    Filed: April 2, 2009
    Date of Patent: October 8, 2013
    Assignee: V & M Deutschland GmbH
    Inventors: Andreas Groos, Stefan Nitsche
  • Patent number: 8547086
    Abstract: There is provided a coercivity performance determination device for a coercivity distribution magnet that is capable of determining, in a short period of time, with precision, and at as low a testing cost as possible, whether or not each part of one coercivity distribution magnet has a coercivity that is equal to or greater than the required coercivity. A coercivity determining device of the present invention comprises: a substantially C-shaped magnetic body; excitation means that generates a magnetic flow in the magnetic body; and a flux meter that measures the residual magnetic flux of the coercivity distribution magnet. Protrusions are provided at corresponding positions on two opposing end faces of the magnetic body, and the coercivity distribution magnet is held between the two protrusions to form an annular magnetic circuit. An external magnetic field generation means is formed by magnetic regions caused by the protrusions and non-magnetic regions comprising the air in the periphery thereof.
    Type: Grant
    Filed: August 11, 2010
    Date of Patent: October 1, 2013
    Assignee: Toyota Jidosha Kabushiki Kaisha
    Inventors: Masafumi Suzuki, Mayumi Nakanishi
  • Publication number: 20130249540
    Abstract: The invention provides a method for compensating the sensitivity variations induced by lift-off variations for an eddy current array probe. The invention uses the eddy current array probe coils in two separate ways to produce a first set of detection channels and a second set of lift-off measurement channels without the need to add coils dedicated to the lift-off measurement operation. Another aspect of the invention provides an improved calibration process which combines the detection and lift-off measurement channel calibration on a simple calibration block including a reference defect without the need of a pre-defined lift-off condition.
    Type: Application
    Filed: March 22, 2012
    Publication date: September 26, 2013
    Applicant: OLYMPUS NDT INC.
    Inventor: Benoit Lepage
  • Patent number: 8513943
    Abstract: An apparatus, system, and method are disclosed for maintaining normalcy of a sensor with respect to a structure. The apparatus includes a driving member, a driven member, and a sensor. The driving member includes a first engaging element and a second engaging element. The driven member includes a third engaging element and a fourth engaging element. The third engaging element of the driven member is engaged with the first engaging element of the driving member. The fourth engaging element of the driven member is engaged with the second engaging element of the driving member. The sensor is coupled to the driven member, which is rotatably drivable by the driving member. Engagement between the first and third engaging elements facilitates three-dimensional adjustment of the driven member relative to the driving member. Engagement between the second and fourth engaging elements facilitates co-rotation of the driving member and the driven member.
    Type: Grant
    Filed: August 24, 2010
    Date of Patent: August 20, 2013
    Assignee: United Western Technologies Corporation
    Inventors: Mark Gehlen, Gary Brockman, Steve Hubbard
  • Publication number: 20130187643
    Abstract: A test set-up (10) for non-destructive detection of a flaw in a device being tested by means of an eddy current has an excitation coil (14), to which an excitation signal (SE) can be sent to act on the device being tested (16) with an electromagnetic alternating field, a receiving coil (17) to generate a coil signal (SP), which is a function of the flaw in the device being tested (16), an analog-digital converter (21), which is coupled to the receiving coil (17) on the input side, a filter arrangement (22), which is coupled to the analog-digital converter (21) on the input side and is designed for band-pass filtering and scan rate reduction, and a demodulator (27), which is coupled to an output of the filter arrangement (22) on the input side.
    Type: Application
    Filed: July 13, 2012
    Publication date: July 25, 2013
    Applicant: Prüftechnik Dieter Busch AG
    Inventors: Heinrich LYSEN, Werner BRÄU
  • Patent number: 8493064
    Abstract: An apparatus, system, and method are disclosed for scanning metallic surfaces. The apparatus, in one embodiment, comprises a shaft and a rotating member. The rotating member may comprise a sensing end and a featuring engaging element. The shaft further comprises a first coupling element and the rotating member further comprises a second coupling element. The first coupling element may be coupleable with the second coupling element such that the rotating member is pivotable at any three-dimensional angle with respect to the shaft to orient the sensing surface parallel to the scanned surface.
    Type: Grant
    Filed: August 24, 2010
    Date of Patent: July 23, 2013
    Assignee: United Western Technologies Corporation
    Inventors: Mike Setbacken, Mark Gehlen, Steve Hubbard, Fred Perrin