Electromagnetic (e.g., Eddy Current) Patents (Class 702/38)
  • Patent number: 11547495
    Abstract: The invention involves a system and method for increasing positional accuracy of surgical systems that utilize magnetic or electromagnetic sensors to provide positional awareness to a surgeon or robot performing the surgery. The system takes advantage of electromagnetic tracking through sensors. These sensors are very accurate and repeatable, while being compact enough to not inhibit surgical procedures. The accuracy and repeatability of the sensors is <1 mm within a predetermined 6 inch×6 inch performance motion box. The system is constructed and arranged to map the distortion patterns of the sensor and, in real time, correct the distortion pattern to provide accurate location of anatomical structures for performance of a surgery.
    Type: Grant
    Filed: April 22, 2020
    Date of Patent: January 10, 2023
    Assignee: Globus Medical, Inc.
    Inventors: Peter L. Bono, James D. Lark, John S. Scales, Thomas J. Lord
  • Patent number: 11268931
    Abstract: Disclosed are method and apparatus for measuring material properties. Segmented field sensors have multiple sensing elements at different spatial geometries to capture field components having substantially different depths of penetration. These sensors are excited and measured on these different sensing elements to facilitate characterization of unknown material properties. This is illustrated in some embodiments using eddy current sensors to characterize materials that are frequency dispersive and/or do not produce a measurable phase shifts. Only a single scalar quantity may provide independent information from one or more of the sensing elements. Property estimation techniques, such as those using precomputed databases of sensor responses are used to estimate the unknown material properties.
    Type: Grant
    Filed: June 18, 2019
    Date of Patent: March 8, 2022
    Assignee: JENTEK Sensors, Inc.
    Inventors: Neil J Goldfine, Andrew P Washabaugh, Todd M Dunford, Zachary M Thomas
  • Patent number: 11156486
    Abstract: The magnetic flowmeter includes at least one coil and a pair of electrodes is configured to detect an electromotive force within the process fluid flow in response to the magnetic field. Measurement circuitry is coupled to the electrodes and is configured to provide an indication of the detected electromotive force. A processor is coupled to the measurement circuitry and is configured to receive the indication of the detected electromotive force. The processor is configured to obtain a sequence of indications of detected electromotive force over a time interval and to generate a plurality of sets of emf samples by selecting non-continuous indications of the detected electromotive force. Each of the sets of emf samples is processed by a signal processing engine to provide an emf sample output. The processor is configured to combine emf sample outputs from each set of emf samples to generate a process fluid flow output.
    Type: Grant
    Filed: September 13, 2019
    Date of Patent: October 26, 2021
    Assignee: Micro Motion, Inc.
    Inventor: Scot R. Foss
  • Patent number: 10884423
    Abstract: A system includes an inspection robot having a plurality of input sensors comprising a plurality of magnetic induction sensors and configured to provide inspection data of an inspection surface, wherein the inspection data comprises electromagnetic (EM) induction data, and wherein the plurality of input sensors are distributed horizontally relative to the inspection surface; wherein at least a portion of the inspection surface comprises a ferrous substrate having a non-ferrous coating thereupon; a controller, comprising: an EM data circuit structured to interpret the EM induction data, and to determine a substrate distance value in response to the EM induction data; and a thickness processing circuit structured to determine a thickness value in response to the EM induction data, the thickness value comprising a thickness of the non-ferrous coating.
    Type: Grant
    Filed: June 4, 2018
    Date of Patent: January 5, 2021
    Assignee: Gecko Robotics, Inc.
    Inventors: Mark Loosararian, Joshua Moore, Yizhu Gu, Kevin Low, Edward Bryner, Logan MacKenzie, Ian Miller, Alvin Chou, Todd Joslin
  • Patent number: 10816431
    Abstract: An electrically conductive probe, such as a probe similar to those utilized in other electric leak detection systems, is positioned electrically adjacent to different regions of a wall of an underground access chamber, for detection of leaks therein. In one embodiment, the probe is positioned at an elevation and circumferential position which is sequentially adjusted so that the probe can scan regions of the wall for leaks. In another embodiment, a modified probe remains centrally located within the underground access chamber and only moved vertically. The modified probe is fitted with whiskers extending radially. The modified probe includes sectors circumferentially spaced from each other and with each whisker associated with one of the sectors. A selector switch electrically connects one sector to the electrically conductive cable. Data collected by either probe can be graphed or otherwise analyzed with regions of high conductivity correlating with leaks in the underground access chamber.
    Type: Grant
    Filed: September 5, 2018
    Date of Patent: October 27, 2020
    Assignee: Electro Scan, Inc.
    Inventors: Charles A. Hansen, Mark J. Grabowski, Sean T. Blottie, Cory T. Peters, Sonja M. Hansen, Bianca C. Hansen, Charles E. G. Johnson
  • Patent number: 10697935
    Abstract: Methods and systems for inspecting insulated equipment for corrosion under insulation are provided. The system includes an autonomous unmanned vehicle having aerial and ground locomotive capabilities. The vehicle includes an infrared detector and a pulsed eddy current sensor. In the method, infrared waves emitted from the equipment are detected along the equipment with the infrared detector. Using the infrared detector, at least one image of an inner surface of the equipment is developed based on the detected infrared waves. At least one area that is susceptible to corrosion is determined based on the at least one image. The susceptible area is inspected with the pulsed eddy current sensor, which induces an eddy current in the inner wall of the equipment. Based on a rate of the decay in strength of the eddy current, it is determined whether corrosion exists at the susceptible area using a processor configured by code.
    Type: Grant
    Filed: November 15, 2018
    Date of Patent: June 30, 2020
    Assignee: Saudi Arabian Oil Company
    Inventors: Ayman Amer, Ali Shehri, Brian Parrott
  • Patent number: 10619991
    Abstract: A vertical shaft steel wire rope cage guide sliding sleeve wear amount detection device includes flexible printed circuit (FPC) flat cable units, voltage detection circuit units, a control system, and data display equipment. Two end faces of a vertical shaft steel wire rope cage guide sliding sleeve are provided with the FPC flat cable units, the FPC flat cable units being sequentially attached to end portion surfaces of the sliding sleeve along an outer periphery of a rope hole of a steel wire rope to form an enclosure; each FPC flat cable unit is connected to one voltage detection circuit unit; a signal input end of the control system is connected with the voltage detection circuit units, and a signal output end of a control module is connected to a wireless transmission module; and the data display equipment receives data transmitted by the wireless transmission module.
    Type: Grant
    Filed: September 21, 2018
    Date of Patent: April 14, 2020
    Assignees: CHINA UNIVERSITY OF MINING AND TECHNOLOGY, XUZHOU ZHIRUN MINING EQUIPMENT SCIENCE AND TECHNOLOGY CO., LTD
    Inventors: Gongbo Zhou, Zhencai Zhu, Gang Shen, Yuan Sun, Qiao Gao, Chaoquan Tang, Ping Zhou, Gang Zhang, Wei Li, Guohua Cao, Yuxing Peng, Songyong Liu, Fan Jiang, Xin Zhang
  • Patent number: 10481037
    Abstract: A method for detecting deterioration of a structural part includes: detecting a waveform of time domain of the structural part by a sensor disposed on the structural part; performing a conversion of time domain to frequency domain for the waveform of time domain by a processor electrically connected to the sensor so as to obtain an actual modal parameter of each of a plurality of modals related to a waveform of frequency domain of the structural part; comparing the actual modal parameter of each of the plurality of modals to modal parameter information stored in a database to determine whether a deterioration defect exists in the structural part; and determining a degree and a position of the deterioration defect when the deterioration defect exists in the structural part.
    Type: Grant
    Filed: December 27, 2017
    Date of Patent: November 19, 2019
    Assignee: INDUSTRIAL TECHNOLOGY RESEARCH INSTITUTE
    Inventors: Yao-Long Tsai, Li-Hua Wang
  • Patent number: 10222465
    Abstract: In an embodiment of the disclosed technology, a visual output of data from a ground-penetrating radar and magnetic field measuring device is displayed on a visual medium. The display has a first exhibition of output from the ground-penetrating radar device and a second from a magnetic field measuring device, such as a very low frequency (VLF) receiver. Using an identical axis, such as an X-axis measuring time or distance, output of each device is exhibited and overlaid over one another. In this manner, one can detect (using two different methodologies and uses) the visual exhibition of both to best determine the location of a metal or electrical target.
    Type: Grant
    Filed: December 29, 2015
    Date of Patent: March 5, 2019
    Assignee: Geophysical Survey Systems, Inc.
    Inventor: Jeffrey R Feigin
  • Patent number: 9945814
    Abstract: The invention relates to improved systems and methods for inspecting the tubes of a steam generator of a nuclear reactor that involves modeling the steam generator, comparing signals of a tube from an eddy current sensor with aspects of the model to determine whether further analysis is required, employing primary and secondary analysis processes, and producing a combined report of the primary and secondary analysis results.
    Type: Grant
    Filed: July 15, 2015
    Date of Patent: April 17, 2018
    Assignee: Westinghouse Electric Company LLC
    Inventors: Qui V. Le, Stephen J. Beehner
  • Patent number: 9581520
    Abstract: Embodiments of the present invention provide systems to detect crack-like features in pipeline welds using magnetic flux leakage data and pattern recognition. A screening process, for example, does not affect or change how survey data is recorded in survey tools; only how it is analyzed after the survey data is completed. Embodiments of the present invention can be used to screen for very narrow axial anomalies in the pipeline welds, and may also be used to predict the length of such anomalies. Embodiments of the present invention also produce a listing of the anomalies based on their relative signal characteristics.
    Type: Grant
    Filed: November 19, 2010
    Date of Patent: February 28, 2017
    Assignee: Kinder Morgan, Inc.
    Inventors: Noel Duckworth, Ron Sherstan
  • Patent number: 9389276
    Abstract: Faults and fault types in electric machines can be identified based on spectra associated with stator and field currents. Signals associated with such currents can be compensated for line variations, and spectral contributions for non-eccentric machines can be reduced or eliminated to permit distinguish static eccentricities from non-eccentric machine operation. One or more of a static eccentricity, a dynamic eccentricity, and a mixed eccentricity can be identified based on spectral component magnitudes at selected frequencies.
    Type: Grant
    Filed: June 15, 2012
    Date of Patent: July 12, 2016
    Inventors: Subhasis Nandi, Ilamparithi Thirumarai Chelvan
  • Patent number: 9304055
    Abstract: The system utilizes electroscan equipment including a voltage source and current meter with a cable having one end grounded and one end having an electric probe thereon sized to fit within an underground pipe. The probe is able to complete an electric circuit back to ground when the probe is adjacent a defect through which electric currents can pass, thus producing varying electric current. A cable reel is provided with portions of the cable supported thereon and with a cable distance sensor coupled to the reel along with the current meter and voltage source in the form of a battery. The current meter and distance sensor transmit wireless signals to an on-site processor, such as a smartphone, for on-site data evaluation. Such unconditioned data is also transmitted to a remote location for conditioning of the data and retransmission of the conditioned data back to the on-site processor.
    Type: Grant
    Filed: February 15, 2013
    Date of Patent: April 5, 2016
    Assignee: Electro Scan, Inc.
    Inventors: Charles Hansen, Robert Jackson Harris
  • Patent number: 9243972
    Abstract: Embodiments of the present invention provide computer-implemented methods to detect crack-like features in pipeline welds using magnetic flux leakage data and pattern recognition. A screening process, for example, does not affect or change how survey data is recorded in survey tools; only how it is analyzed after the survey data is completed. Embodiments of the present invention can be used to screen for very narrow axial anomalies in the pipeline welds, and may also be used to predict the length of such anomalies. Embodiments of the present invention also produce a listing of the anomalies based on their relative signal characteristics.
    Type: Grant
    Filed: November 24, 2010
    Date of Patent: January 26, 2016
    Assignee: Kinder Morgan, Inc.
    Inventors: Noel Duckworth, Ron Sherstan
  • Patent number: 9170303
    Abstract: A system and method for determining electric motor efficiency includes a monitoring system having a processor programmed to determine efficiency of an electric motor under load while the electric motor is online. The determination of motor efficiency is independent of a rotor speed measurement. Further, the efficiency is based on a determination of stator winding resistance, an input voltage, and an input current. The determination of the stator winding resistance occurs while the electric motor under load is online.
    Type: Grant
    Filed: April 18, 2011
    Date of Patent: October 27, 2015
    Assignee: Eaton Corporation
    Inventors: Bin Lu, Thomas G. Habetler
  • Patent number: 9121601
    Abstract: An insertion-hole blockage-rate evaluation system is applied to a heat exchanger that includes a heat transfer tube and a tube support plate having an insertion hole formed therein for inserting the heat transfer tube therethrough. The tube support plate is displayed in a three dimensional manner in an elliptical diagram with a ratio between a long axis and a short axis being in a range from 1.0 to 2.0 inclusive, each of the tube support plates is serially arranged so as not to overlap on each other, and the insertion-hole blockage-rate evaluation system includes an imaging process of color-coding and displaying the diagram displayed in the three-dimensional elliptical shape according to a value of a blockage rate of the insertion hole acquired by checking the blockage rate of the insertion hole.
    Type: Grant
    Filed: March 23, 2012
    Date of Patent: September 1, 2015
    Assignee: MITSUBISHI HEAVY INDUSTRIES, LTD.
    Inventors: Yuji Kohashi, Naoto Kawase, Kayoko Kawata, Takashi Inagaki, Masaharu Michihashi
  • Patent number: 9103896
    Abstract: A method and a device for establishing excitation parameters, in particular for establishing an excitation profile, for MR imaging, are proposed. Elements of a k-space covariance matrix are determined for signal noise in k-space data which is captured using a plurality of receive channels in the context of data captured at an examination object. Elements of at least one image space covariance matrix are mathematically determined for a plurality of voxels of the examination object as a function of the k-space covariance matrix. The excitation parameters are established as a function of the determined elements of the at least one image space covariance matrix.
    Type: Grant
    Filed: February 28, 2012
    Date of Patent: August 11, 2015
    Assignee: SIEMENS AKTIENGESELLSCHAFT
    Inventor: Patrick Gross
  • Patent number: 9097767
    Abstract: A system and method for determining the health of a DC motor, such as a DC motor on a vehicle. The method includes measuring a current output signal of the DC motor, determining a mean of the measured current signal over a predetermined time period and determining a variance estimation of the mean of the measured current. The method then uses the variance estimation to determine the health of the motor, including an end-of-life prediction of the motor, and uses the mean of the measured current to determine the performance (torque) of the motor.
    Type: Grant
    Filed: January 9, 2012
    Date of Patent: August 4, 2015
    Assignee: GM Global Technology Operations LLC
    Inventors: Mark N. Howell, Pattada A. Kallappa, Avoki Omekanda
  • Publication number: 20150134273
    Abstract: Non-destructive material examination of a test part by scanning induction thermography improves upon the quality of a manual measurement by an inspecting person. Recorded infrared images undergo evaluation and references corresponding to the evaluation are projected onto the test piece for an inspecting person.
    Type: Application
    Filed: June 12, 2013
    Publication date: May 14, 2015
    Applicant: SIEMENS AKTIENGESELLSCHAFT
    Inventors: Lukasz Adam Bienkowski, Christian Homma, Max Rothenfusser
  • Publication number: 20150127274
    Abstract: The apparatus employs the remote field eddy-current (RFEC) inspection technique to electromagnetically measure physical parameters of a metallic pipe. RFEC devices inserted into and displaced along a cylindrical pipes may be used to measure the ratio of pipe thickness to electromagnetic skin-depth and thus allow for the non-invasive detection of flaws or metal loss. Typically these RFEC thickness measurements exhibit a so-called double-indication of flaws, an undesired artifact due to a double-peaked geometrical sensitivity function of the device. The method describes a means by which this double indication artifact may be removed by an appropriate processing of RFEC measurements performed by an apparatus specifically designed for this purpose. The invention is particularly well designed for applications in the oilfield industry.
    Type: Application
    Filed: January 6, 2015
    Publication date: May 7, 2015
    Inventors: Emmanuel Legendre, Thilo M. Brill, Richard A. Rosthal, Gerald N. Minerbo
  • Publication number: 20150066391
    Abstract: The disclosure describes methods, devices and tools useful in the non-destructive inspection and the characterization of mechanical damage such as dents in pipelines. Methods, devices and tools described herein make use of a strain severity indication combined with a material loss indication such as magnetic flux leakage to determine whether a dent comprises at least one of a crack, a gouge and corrosion. The characterization of the mechanical damage in dents of pipes may be used to determine whether and when any corrective or preventive action should be carried out.
    Type: Application
    Filed: August 30, 2013
    Publication date: March 5, 2015
    Applicant: TransCanada Pipelines Limited
    Inventor: Rick Yahua WANG
  • Publication number: 20150057952
    Abstract: An inspection system for inspecting a target object is disclosed. The inspection system includes an inspection module. The inspection module includes a housing, a sensor adapted to provide sensor data relating to the target object, an inspection module processor adapted to receive the sensor data from the sensor and to provide corresponding packaged data, and an inspection module interface adapted to output the packaged data from the inspection module processor. The inspection system also includes a handset adapted to selectively mechanically engage with the inspection module. The handset includes a handset processor, a handset interface adapted to receive the packaged data from the inspection module interface and to provide the packaged data to the handset processor, and a user output interface responsive to the handset processor to output information about the target object to a user based on the packaged data.
    Type: Application
    Filed: August 26, 2013
    Publication date: February 26, 2015
    Applicant: General Electric Company
    Inventors: Kevin Andrew Coombs, Joshua Lynn Scott
  • Patent number: 8949042
    Abstract: The present invention discloses an autonomous magnetic tomography method (MTM) and device for magnetographic identification and magnetographic analysis of mechanical flaws and defects along structures located deep in the sea or otherwise located underwater and further underground. The invention optimizes the inspection and maintenance processes of extended metallic constructions, e.g., pipelines. The device is based on the inverse magnetostrictive effect (i.e., the Villari effect)—the variation of a material's magnetic susceptibility under applied mechanical stress. The changes in magnetic susceptibility result in distribution of a magnetic field gradient along a structure's surface area, thus providing information about the presence and the value of the magnetic field anomaly at a given and precise location on the structure. The device and method is capable of autonomous and offline operation underwater at depths up to 1,500 meters below sea level.
    Type: Grant
    Filed: April 2, 2014
    Date of Patent: February 3, 2015
    Inventors: Valerian Goroshevskiy, Svetlana Kamaeva, Igor Kolesnikov, Leonid Ivlev
  • Patent number: 8903680
    Abstract: An apparatus for evaluating layers, including interlayer gaps, in a multi-layer structure; the multi-layer structure presenting a plurality of edges generally aligned athwart an axis; the apparatus includes: (a) a sensing unit configured for sensing at least one parameter; (b) a positioning unit coupled with the sensing unit; the positioning unit being configured to effect moving the sensing unit generally along the axis; and (c) a control unit coupled with at least one of the positioning unit and the sensing unit. The control unit provides an electrical signal to the sensing unit. The control unit monitors changes in the at least one parameter as the sensing unit moves past the plurality of edges. The control unit employs the changes in the at least one parameter to effect the evaluating.
    Type: Grant
    Filed: December 10, 2010
    Date of Patent: December 2, 2014
    Assignee: The Boeing Company
    Inventors: John R. Linn, Jeffrey G. Thompson
  • Publication number: 20140257718
    Abstract: A method for determining tube support plate blockage of a steam generator includes the following steps: measuring at least five different eddy current values per tube support intersection; calculating a nominal clean fit radius of flow hole; determining a center signal response; converting the center signal response to a deposit thickness; determine an edge reduction; converting the edge reduction to an edge thickness; calculating the resulting flow hole radius; verifying the reasonableness of the resulting flow hole radius; and determining a virtual calibration range.
    Type: Application
    Filed: May 22, 2014
    Publication date: September 11, 2014
    Applicant: AREVA Inc.
    Inventors: John C. Griffith, Joseph R. Wyatt, Mihai G.M. Pop, Jeffrey M. Fleck
  • 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
  • Publication number: 20140214340
    Abstract: An apparatus and a method for detecting at least one periodically occurring defect on an object, in particular on a metal strip, in which at least one time signal is recorded from the moving object using a measuring method, the time signal is converted into a quality function using a stochastic method and one or more periodic signals in the time signal are inferred on the basis of this quality function in order to thereby detect at least one periodically occurring defect on the object. In order to obtain advantageous method properties, it is proposed to convert the time signal recorded by means of the measuring method, in particular the electromagnetic measuring method, into the quality function using a model-based estimation method, in particular using a maximum likelihood method.
    Type: Application
    Filed: July 16, 2012
    Publication date: July 31, 2014
    Applicant: VOESTALPINE STAHL GMBH
    Inventors: Thomas Pfatschbacher, Johann Reisinger, Norbert Gstoettenbauer, Stefan Schuster, Karsten Lothar Feiste
  • Patent number: 8788219
    Abstract: Method of determining an edge of a first anomaly in a wall of a pipeline from a first set of data elements representing measurements of the wall of the pipeline. An element of the first set comprises a first coordinate, a second coordinate, and a parameter being indicative for the presence and/or severity of the first anomaly a position along the wall indicated by the first and second coordinate. The method comprises determining a data element that is associated with a maximum in the severity of the first anomaly; evaluating a value of the parameter by comparing with a predetermined threshold; determining an initial edge data element for which the parameter has reached the threshold; determining a next edge data element; determining further edge data elements; and determining the edge of the first anomaly by combining the first and second coordinates of the determined edge data elements.
    Type: Grant
    Filed: May 11, 2010
    Date of Patent: July 22, 2014
    Assignee: Röntgen Technische Dienst B.V.
    Inventors: Martin Fingerhut, Deli Yu
  • Patent number: 8788220
    Abstract: An impact detection and remediation system includes a sensing device for detecting damage events related to a structure of interest. Such damage events may include impact from a ballistic object, a tamper event, a physical impact, or other events that may affect structural integrity or cause failure. Illustratively, the sensing device is in communication with a measurement system to determine impact criteria, and a processing system which is configured to use the impact criteria to determine a direction of the initiation point of a ballistic causing the damage event.
    Type: Grant
    Filed: June 16, 2011
    Date of Patent: July 22, 2014
    Assignee: The United States of America as represented by the Secretary of the Navy
    Inventors: Alexander M. Soles, Matthew R. Walsh, Eric B. Scott
  • Publication number: 20140200831
    Abstract: A technique facilitates evaluation of pipe. A sensor is positioned to examine a pipe and to obtain data on the pipe. The data obtained is analyzed on a processor-based system and compared to predetermined defect data. If the data obtained by the sensor sufficiently matches predetermined defect data, a defect is determined to enable performance of an appropriate action with respect to the pipe.
    Type: Application
    Filed: January 30, 2012
    Publication date: July 17, 2014
    Applicant: SCHLUMBERGER TECHNOLOGY CORPORATION
    Inventors: David P. Smith, Bonnie Powell, Russell Powell
  • Publication number: 20140200832
    Abstract: An apparatus comprises an inspection vehicle, a sensor system, a positioning system, a controller, and a support system. The inspection vehicle is configured to move on a surface of an object. The sensor system is associated with the inspection vehicle and is configured to generate information about the object when the inspection vehicle is on the surface of the object. The positioning system is configured to determine a location of the inspection vehicle on the object. The controller is configured to control movement of the inspection vehicle using the positioning system and control operation of the sensor system. The support system is connected to the inspection vehicle and is configured to support the inspection vehicle in response to an undesired release of the inspection vehicle from the surface of the object.
    Type: Application
    Filed: January 8, 2014
    Publication date: July 17, 2014
    Applicant: The Boeing Company
    Inventors: James J. Troy, Gary Ernest Georgeson, Karl Edward Nelson, Scott Wesley Lea
  • Publication number: 20140172326
    Abstract: A method implemented using a processor based device includes obtaining a measured electrical signal from an electrical device coupled to a mechanical device and generating a signal signature representative of a fault in the mechanical device based on the measured electrical signal. The method also includes determining a diagnostic parameter based on a harmonic frequency of the signal signature and determining the fault in the mechanical device based on the diagnostic parameter.
    Type: Application
    Filed: December 17, 2012
    Publication date: June 19, 2014
    Applicant: GENERAL ELECTRIC COMPANY
    Inventors: Pinjia Zhang, Prabhakar Neti
  • Patent number: 8744781
    Abstract: A method for determining tube support plate blockage of a steam generator includes the following steps: measuring at least five different eddy current values per tube support intersection; calculating a nominal clean fit radius of flow hole; determining a center signal response; converting the center signal response to a deposit thickness; determine an edge reduction; converting the edge reduction to an edge thickness; calculating the resulting flow hole radius; verifying the reasonableness of the resulting flow hole radius; and determining a virtual calibration range.
    Type: Grant
    Filed: August 20, 2013
    Date of Patent: June 3, 2014
    Assignee: AREVA Inc.
    Inventors: John C. Griffith, Joseph R. Wyatt, Mihai G. M. Pop, Jeffrey M. Fleck
  • Patent number: 8731987
    Abstract: A technique that is usable with a well includes providing a model so predict measurements that are received by receivers due to transmissions by sources based on estimated positions of the receivers relative to the sources. The estimated positions each have at least two dimensions. At least some of the receivers and the sources are located in the well. On a computer, the estimated positions are automatically refined based on a comparison of the predicted measurements and actual measurements that are obtained by the receivers.
    Type: Grant
    Filed: May 7, 2007
    Date of Patent: May 20, 2014
    Assignee: Schlumberger Technology Corporation
    Inventors: Jiuping Chen, Ping Zhang, Michael Wilt, Edward Nichols, David Alumbaugh
  • Patent number: 8717008
    Abstract: A fan speed testing system includes a voltage regulating module, a rotational frequency collecting module, and a rotational frequency converting module. The voltage regulating module receives an AC voltage signal and converts the AC voltage signal to a variable first DC voltage signal to adjust a rotational speed of a fan. The rotational frequency collecting module detects the rotational speed of the fan and outputs rotational frequency signals. The rotational frequency converting module receives the rotational frequency signals and determines the rotational speed of the fan according to numbers and period of time level voltage switching in the rotational frequency signals.
    Type: Grant
    Filed: April 28, 2011
    Date of Patent: May 6, 2014
    Assignees: Hong Fu Jin Precision Industry (ShenZhen) Co., Ltd., Hon Hai Precision Industry Co., Ltd.
    Inventors: Xiang-Biao Chen, Li-Ping Fan, Yu-Lin Liu
  • Patent number: 8639475
    Abstract: A system and method of signal detection from a given point, in which a radiative aperture, such as a sonar sensor, radar antenna, acoustic sensor, or the like, receives radiation from the point at more than one range. At each range, the signal incident on each point within the aperture is weighted by the cosine of the angle between a surface normal at the point on the aperture, and a vector from the point on the aperture to the given point. The physical size and shape of the aperture may also be changed to cause the aperture to subtend the same solid angle having the given point as the vertex, at each range. In this manner, the signal from the given point becomes aperture shape independent, facilitating object recognition and imaging.
    Type: Grant
    Filed: May 18, 2009
    Date of Patent: January 28, 2014
    Assignee: The United States of America as represented by the Secretary of the Navy
    Inventor: Richard Rikoski
  • Publication number: 20130338939
    Abstract: Faults and fault types in electric machines can be identified based on spectra associated with stator and field currents. Signals associated with such currents can be compensated for line variations, and spectral contributions for non-eccentric machines can be reduced or eliminated to permit distinguish static eccentricities from non-eccentric machine operation. One or more of a static eccentricity, a dynamic eccentricity, and a mixed eccentricity can be identified based on spectral component magnitudes at selected frequencies.
    Type: Application
    Filed: June 15, 2012
    Publication date: December 19, 2013
    Inventors: Subhasis Nandi, Ilamparithi Thirumarai Chelvan
  • Publication number: 20130338940
    Abstract: A method for determining tube support plate blockage of a steam generator includes the following steps: measuring at least five different eddy current values per tube support intersection; calculating a nominal clean fit radius of flow hole; determining a center signal response; converting the center signal response to a deposit thickness; determine an edge reduction; converting the edge reduction to an edge thickness; calculating the resulting flow hole radius; verifying the reasonableness of the resulting flow hole radius; and determining a virtual calibration range.
    Type: Application
    Filed: August 20, 2013
    Publication date: December 19, 2013
    Applicant: AREVA NP Inc.
    Inventors: John C. Griffith, Joseph R. Wyatt, Mihai G. M. Pop, Jeffrey M. Fleck
  • Patent number: 8600545
    Abstract: A method for qualifying an automated process for inspecting and sorting particles through the production and use of seed particles is disclosed. In one embodiment, seed particles are produced by forming a conformal surface layer on a plurality of particles, thereby imparting them with at least one property whose value or range of values is the same as or about the same as a value or range of values of a corresponding property of undesirable particles. By introducing a predetermined quantity of seed particles, their detection and removal by the automated sorting system can be used to periodically calibrate and qualify the sorting system without interrupting the manufacturing operations or introducing actual undesirable particles into the process stream. The production and use of seed particles to qualify an automated sorting system is particularly well-suited for use with Ti sponge sorting operations.
    Type: Grant
    Filed: December 22, 2010
    Date of Patent: December 3, 2013
    Assignee: Titanium Metals Corporation
    Inventor: Matthew R. Earlam
  • Patent number: 8571816
    Abstract: Gain switching is performed by a DC amplifying circuit. The DC amplifying circuit is provided with individual gain generating circuits and a gain selecting circuit, and saturation preventing circuits are provided in earlier stages than the individual gain generating circuits. The individual gain generating circuit generates a gain G1, the individual gain generating circuit generates a gain G2 (where G2>G1), and the individual gain generating circuit generates a gain G3 (where G3>G2). The gain selecting circuit selects, as a used gain generating circuit, one of the individual gain generating circuits, and sends the output thereof to an A/D converting circuit in a later stage.
    Type: Grant
    Filed: April 19, 2011
    Date of Patent: October 29, 2013
    Assignee: Azbil Corporation
    Inventors: Taka Inoue, Ichirou Mitsutake
  • Patent number: 8543346
    Abstract: One embodiment provides a system that analyzes a target electromagnetic signal radiating from a monitored system. During operation, the system monitors the target electromagnetic signal using a near-isotropic antenna that includes a set of receiving surfaces arranged in a regular polyhedron. Next, the system obtains a set of received target electromagnetic signals from the receiving surfaces. Finally, the system assesses the integrity of the monitored system by separately analyzing each of the received target electromagnetic signals.
    Type: Grant
    Filed: May 29, 2009
    Date of Patent: September 24, 2013
    Assignee: Oracle America, Inc.
    Inventors: Kenny C. Gross, Robert P. Masleid, Ramakrishna C. Dhanekula, David K. McElfresh
  • Publication number: 20130238147
    Abstract: An abnormality diagnosis apparatus for an electric pump prevents an erroneous decision that a normally functioning electric pump has an abnormality. When a motor is driven by a current of the driving motor using an upper limit current I? before a predetermined time T1 passes, it is decided that there is a probability that an abnormality occurs in the pump and the decision is reported to an external device when the number of rotations of the motor is less than the lower limit number of rotations set under lower limit temperature of a hydraulic oil. When the motor is driven by limiting the current of the motor by I? and I? (<I?) after T1 passes, it is decided that there is a probability of occurrence of an abnormality when rotation of the motor stops and the decision is reported to the external device.
    Type: Application
    Filed: March 7, 2013
    Publication date: September 12, 2013
    Applicant: HITACHI AUTOMOTIVE SYSTEMS, LTD.
    Inventor: Naoki OKAMOTO
  • Patent number: 8527216
    Abstract: A method for determining tube support plate blockage of a steam generator includes the following steps: measuring at least five different eddy current values per tube support intersection; calculating a nominal clean fit radius of flow hole; determining a center signal response; converting the center signal response to a deposit thickness; determine an edge reduction; converting the edge reduction to an edge thickness; calculating the resulting flow hole radius; verifying the reasonableness of the resulting flow hole radius; and determining a virtual calibration range.
    Type: Grant
    Filed: February 8, 2010
    Date of Patent: September 3, 2013
    Assignee: Areva NP Inc
    Inventors: John C. Griffith, Joseph R. Wyatt, Mihai G. M. Pop, Jeffrey M. Fleck
  • Publication number: 20130226472
    Abstract: A method for monitoring the condition of a piezoinjector of a fuel injection system is disclosed. The fuel injection is carried out in injection cycles, each of which comprises a filling phase, a holding phase, and an emptying phase. The discharge resistance is ascertained during the holding phase of the piezoinjector. Conclusions about the working order of the piezoinjector are drawn using the ascertained discharge resistance.
    Type: Application
    Filed: October 5, 2011
    Publication date: August 29, 2013
    Inventor: Robert Hoffmann
  • Publication number: 20130218485
    Abstract: The system utilizes electroscan equipment including a voltage source and current meter with a cable having one end grounded and one end having an electric probe thereon sized to fit within an underground pipe. The probe is able to complete an electric circuit back to ground when the probe is adjacent a defect through which electric currents can pass, thus producing varying electric current. A cable reel is provided with portions of the cable supported thereon and with a cable distance sensor coupled to the reel along with the current meter and voltage source in the form of a battery. The current meter and distance sensor transmit wireless signals to an on-site processor, such as a smartphone, for on-site data evaluation. Such unconditioned data is also transmitted to a remote location for conditioning of the data and retransmission of the conditioned data back to the on-site processor.
    Type: Application
    Filed: February 15, 2013
    Publication date: August 22, 2013
    Applicant: ELECTRO SCAN, INC.
    Inventor: Electro Scan, Inc.
  • Patent number: 8515689
    Abstract: A method for determining the location of underground cables and pipes is disclosed. In some embodiments, the method includes measuring a set of electromagnetic field magnitudes and phases at a plurality of positions while traversing a target line parallelly using 3D electromagnetic coil sensors, the 3D electromagnetic coil sensors being orthogonally oriented to the target line, modeling a set of expected complex electromagnetic field magnitudes of a single underground conductor at each of the positions to form a set of values corresponding to a set of individual models for the target line, determining which of the set of individuals models is a best model, determining confidence information at each of the positions based on a comparison between the measured set of complex electromagnetic magnitudes and phases and the best model, and determining parameters at each of positions related to the target line from the best model.
    Type: Grant
    Filed: September 12, 2008
    Date of Patent: August 20, 2013
    Assignee: Metrotech Corporation Inc.
    Inventors: Kun Li, Jim Waite, Ruwan Welaratna, Johan Overby, Paolo Salvagione
  • Patent number: 8515690
    Abstract: A line locator includes a signal detector to detect signals from an underground line; an error modeler that models a phase error in the signal from neighboring underground lines; and an enhanced electromagnetic field modeler that provides a location of the underground line based on the signal and a result from the error modeler.
    Type: Grant
    Filed: May 25, 2012
    Date of Patent: August 20, 2013
    Assignee: Metrotech Corporation
    Inventor: Kun Li
  • Patent number: 8510061
    Abstract: Methods, systems, and computer readable media for wireless crack detection and monitoring are disclosed. According to one system, a crack detector is affixed to a surface of a material for detecting a crack in the material. In response to detecting a crack, a crack indicator is generated, indicating the existence of the crack. A mote wirelessly communicates the crack indicator to an external device. The mote may also store multiple crack indicators in local memory before being downloaded to the external device. In other embodiments, the mote may time-stamp the crack indicator for indicating a time when the crack was detected. Additionally, the mote may associate other information with the crack indicator such as temperature and acceleration information.
    Type: Grant
    Filed: August 3, 2009
    Date of Patent: August 13, 2013
    Assignees: North Carolina State University, DRS C3 & Aviation Company
    Inventors: Edward Grant, Matthew David Craver, Carey Merritt, Kyle Luthy, Jonathan Simmons, Kyle Roberts, Norman V. Scurria, Jr., Robert C. Roth, Roger C. Sanwald, John S. Strenkowski, Leonardo Serra Mattos
  • Publication number: 20130191041
    Abstract: In a general methodology for insulation defect identification in a generator core, a Chattock coil is used to measure magnetic potential difference between teeth. Physical knowledge and empirical knowledge is combined in a model to predict insulation damage location and severity. Measurements are taken at multiple excitation frequencies to solve for multiple characteristics of the defect.
    Type: Application
    Filed: January 16, 2013
    Publication date: July 25, 2013
    Applicants: Siemens Energy, Inc., Siemens Corporation
    Inventors: Xuefei Guan, Jingdan Zhang, Shaohua Kevin Zhou, Mark W. Fischer, Waheed A. Abbasi, Scott A. Karstetter, Christopher John William Adams
  • Patent number: 8493065
    Abstract: Method and device for nondestructive and noncontact detection of faults in a test piece, or electrically conductive particles in a liquid flow, moving past the device, using eddy currents. The test piece or flow is exposed to periodic alternating electromagnetic fields. A periodic electrical signal is detected by a receiver coil. The receiver coil signal has a carrier oscillation whose amplitude and/or phase is modulated by defects in the test piece or by electrically conducting particles and is digitized. A useful signal is produced from the digitized receiver coil signal, and the useful signal is evaluated with an evaluation unit to detect faults in the test piece or electrically conductive particles. When overdriving of the A/D converter stage by the receiver coil signal is ascertained, a part of the receiver coil signal truncated by the A/D converter stage is reconstructed using a mathematical approximation in the digitized receiver coil signal.
    Type: Grant
    Filed: May 20, 2010
    Date of Patent: July 23, 2013
    Assignee: Prueftechnik Dieter Busch AG
    Inventor: Roland Hölzl