Patents by Inventor El Mahjoub Rasselkorde

El Mahjoub Rasselkorde has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Patent number: 10295501
    Abstract: A method for scanning a weld buildup formed on a circumferential portion of a disc for a steam turbine. The method includes providing an ultrasound probe for generating at least one ultrasound beam sweep. The circumferential portion is scanned with a first beam sweep oriented in a first beam orientation to detect a first flaw type in the weld buildup. The circumferential portion is also scanned with a second beam sweep oriented in a second beam orientation to detect a second flaw type in the weld buildup. Further, the circumferential portion is scanned with a third beam sweep oriented in a third beam orientation to detect a third flaw type in the weld buildup. The method also includes rotating the disc about a disc axis during scanning of the circumferential portion and moving the first, second and third beam sweeps in a direction parallel to the disc axis during scanning.
    Type: Grant
    Filed: October 30, 2014
    Date of Patent: May 21, 2019
    Assignee: SIEMENS ENERGY, INC.
    Inventors: El Mahjoub Rasselkorde, Michael F. Fair, David S. Segletes, Erik A. Lombardo, Scott M. Westby-Gibson, Waheed A. Abbasi
  • Patent number: 10197538
    Abstract: System, methods, and devices for inspecting generator rotor slot wedges in-situ are provided. The system includes a controller operably connected to a remote-control carriage for transmitting control signals and receiving data. The carriage includes a drive module for moving the carriage into an inspection area, e.g., through an air gap between the rotor and stator, and an inspection module operable to inspect a rotor wedge surface. The inspection module includes a jack assembly and a transducer assembly. The jack assembly is operably connected to the transducer assembly, and configured to elevate the transducer assembly to the rotor wedge surface for inspection.
    Type: Grant
    Filed: February 2, 2016
    Date of Patent: February 5, 2019
    Assignee: SIEMENS ENERGY, INC.
    Inventors: James Alford, Charles C. Moore, El Mahjoub RasselKorde, James A. Bauer, Joseph T. Beuten
  • Patent number: 9835596
    Abstract: A method and software system for flaw identification, grouping and sizing for fatigue life assessment for rotors used in turbines and generators. The method includes providing ultrasonic data of a plurality of rotor slices and providing volume reconstruction of the ultrasonic data. The method also includes providing in-slice identification, grouping and sizing of flaw indications in the rotor based on the volume reconstruction. Further, the method includes providing inter-slice identification, grouping and sizing of the flaw indications based on the in-slice flaw indications and providing flaw location and size information. The method can be used in both phased-array and A-scan inspections.
    Type: Grant
    Filed: January 3, 2014
    Date of Patent: December 5, 2017
    Assignee: Siemens Energy, Inc.
    Inventors: Xuefei Guan, Jingdan Zhang, Shaohua Kevin Zhou, El Mahjoub Rasselkorde, Waheed A. Abbasi, Steve H. Radke, Chin-Sheng Lee, Ashley L. Lewis
  • Patent number: 9792555
    Abstract: A method for probabilistic fatigue life prediction using nondestructive testing data considering uncertainties from nondestructive examination (NDE) data and fatigue model parameters. The method utilizes uncertainty quantification models for detection, sizing, fatigue model parameters and inputs. A probability of detection model is developed based on a log-linear model coupling an actual flaw size with a nondestructive examination (NDE) reported size. A distribution of the actual flaw size is derived for both NDE data without flaw indications and NDE data with flaw indications by using probabilistic modeling and Bayes theorem. A turbine rotor example with real world NDE inspection data is presented to demonstrate the overall methodology.
    Type: Grant
    Filed: December 16, 2013
    Date of Patent: October 17, 2017
    Assignee: Siemens Energy, Inc.
    Inventors: Xuefei Guan, Jingdan Zhang, Shaohua Kevin Zhou, Kai Kadau, Yan Guo, El Mahjoub Rasselkorde, Waheed A. Abbasi, Chin-Sheng Lee, Ashley L. Lewis, Steve H. Radke
  • Publication number: 20170219533
    Abstract: System, methods, and devices for inspecting generator rotor slot wedges in-situ are provided. The system includes a controller operably connected to a remote-control carriage for transmitting control signals and receiving data. The carriage includes a drive module for moving the carriage into an inspection area, e.g., through an air gap between the rotor and stator, and an inspection module operable to inspect a rotor wedge surface. The inspection module includes a jack assembly and a transducer assembly. The jack assembly is operably connected to the transducer assembly, and configured to elevate the transducer assembly to the rotor wedge surface for inspection.
    Type: Application
    Filed: February 2, 2016
    Publication date: August 3, 2017
    Inventors: James Alford, Charles C. Moore, El Mahjoub RasselKorde, James A. Bauer, Joseph T. Beuten
  • Patent number: 9575034
    Abstract: Immersion ultrasonic NDE is performed within cavities of inanimate objects, having downwardly directed openings, such as for in situ inspection of steam inlet sleeves and steam inlet necks within steam turbine housings. A shaft assembly has one or more single angle or phased array ultrasonic probes that are affixed on an upstream or distal end. An inflatable bladder is affixed to the shaft on a proximal end of the shaft assembly downstream the ultrasonic probe(s). The shaft is inserted into the cavity opening, and the bladder is inflated to form a fluid tight seal against the cavity. Immersion fluid is introduced upstream the bladder in the volume occupied by the probes. Immersion ultrasonic inspection of the object is then performed.
    Type: Grant
    Filed: March 12, 2014
    Date of Patent: February 21, 2017
    Assignee: SIEMENS ENERGY, INC.
    Inventors: El Mahjoub Rasselkorde, Michael F. Fair, Francisco J. Jaimes, Waheed A. Abbasi, James A. Bauer
  • Publication number: 20160123932
    Abstract: A method for scanning a weld buildup formed on a circumferential portion of a disc for a steam turbine. The method includes providing an ultrasound probe for generating at least one ultrasound beam sweep. The circumferential portion is scanned with a first beam sweep oriented in a first beam orientation to detect a first flaw type in the weld buildup. The circumferential portion is also scanned with a second beam sweep oriented in a second beam orientation to detect a second flaw type in the weld buildup. Further, the circumferential portion is scanned with a third beam sweep oriented in a third beam orientation to detect a third flaw type in the weld buildup. The method also includes rotating the disc about a disc axis during scanning of the circumferential portion and moving the first, second and third beam sweeps in a direction parallel to the disc axis during scanning.
    Type: Application
    Filed: October 30, 2014
    Publication date: May 5, 2016
    Inventors: El Mahjoub Rasselkorde, Michael F. Fair, David S. Segletes, Erik A. Lombardo, Scott M. Westby-Gibson, Waheed A. Abbasi
  • Publication number: 20150260690
    Abstract: Immersion ultrasonic NDE is performed within cavities of inanimate objects, having downwardly directed openings, such as for in situ inspection of steam inlet sleeves and steam inlet necks within steam turbine housings. A shaft assembly has one or more single angle or phased array ultrasonic probes that are affixed on an upstream or distal end. An inflatable bladder is affixed to the shaft on a proximal end of the shaft assembly downstream the ultrasonic probe(s). The shaft is inserted into the cavity opening, and the bladder is inflated to form a fluid tight seal against the cavity. Immersion fluid is introduced upstream the bladder in the volume occupied by the probes. Immersion ultrasonic inspection of the object is then performed.
    Type: Application
    Filed: March 12, 2014
    Publication date: September 17, 2015
    Applicant: Siemens Energy, Inc.
    Inventors: El Mahjoub Rasselkorde, Michael F. Fair, Francisco J. Jaimes, Waheed A. Abbasi, James A. Bauer
  • Patent number: 8839673
    Abstract: An industrial ultrasonic inspection system is capable of scanning for discontinuities in relatively thick solid objects such as solid core steel alloy turbine shafts. A phased array probe located on the turbine shaft periphery transmits ultrasonic pulses in a sector-shaped scanning field within the shaft that includes the inner 50% core volume that is of special interest in non-destructive evaluation and inspection. Staggered pulse firing alone or in combination with variable pulse repetition frequency (PRF) may be utilized in order to balance image quality with inspection speed. Discontinuities are identified by analysis of reflected echo waveform energy. Discontinuity size and position within the inspected object is correlated with an equivalent reflector size (ERS) by the Distance-Gain-Size (DGS) method.
    Type: Grant
    Filed: May 2, 2012
    Date of Patent: September 23, 2014
    Assignee: Siemens Energy, Inc.
    Inventors: El Mahjoub Rasselkorde, Waheed A. Abbasi, Larry C. Himes
  • Publication number: 20140229149
    Abstract: A method for probabilistic fatigue life prediction using nondestructive testing data considering uncertainties from nondestructive examination (NDE) data and fatigue model parameters. The method utilizes uncertainty quantification models for detection, sizing, fatigue model parameters and inputs. A probability of detection model is developed based on a log-linear model coupling an actual flaw size with a nondestructive examination (NDE) reported size. A distribution of the actual flaw size is derived for both NDE data without flaw indications and NDE data with flaw indications by using probabilistic modeling and Bayes theorem. A turbine rotor example with real world NDE inspection data is presented to demonstrate the overall methodology.
    Type: Application
    Filed: December 16, 2013
    Publication date: August 14, 2014
    Applicants: SIEMENS CORPORATION, SIEMENS ENERGY, INC., SIEMENS AKTIENGESELLSCHAFT
    Inventors: Xuefei Guan, Jingdan Zhang, Shaohua Kevin Zhou, Kai Kadau, Yan Guo, El Mahjoub Rasselkorde, Waheed A. Abbasi, Chin-Sheng Lee, Ashley L. Lewis, Steve H. Radke
  • Publication number: 20140200853
    Abstract: A method and software system for flaw identification, grouping and sizing for fatigue life assessment for rotors used in turbines and generators. The method includes providing ultrasonic data of a plurality of rotor slices and providing volume reconstruction of the ultrasonic data. The method also includes providing in-slice identification, grouping and sizing of flaw indications in the rotor based on the volume reconstruction. Further, the method includes providing inter-slice identification, grouping and sizing of the flaw indications based on the in-slice flaw indications and providing flaw location and size information. The method can be used in both phased-array and A-scan inspections.
    Type: Application
    Filed: January 3, 2014
    Publication date: July 17, 2014
    Applicants: SIEMENS ENERGY, INC., SIEMENS CORPORATION
    Inventors: Xuefei Guan, Jingdan Zhang, Shaohua Kevin Zhou, El Mahjoub Rasselkorde, Waheed A. Abbasi, Steve H. Radke, Chin-Sheng Lee, Ashley L. Lewis
  • Patent number: 8699817
    Abstract: An image reconstruction method includes receiving volume data comprising a plurality of sampling points, determining a first conditioning of the sampling points suppressing low amplitudes and conserving maximum amplitudes, determining a second conditioning of the sampling points wherein an influence of a sampling point depends on its distance to a grid point in a sampling grid, determining a kernel comprising a plurality of weighting functions for the first conditioning and the second conditioning to determine an energy spread of each of the plurality of sampling points without determining a shape or size of the kernel, and outputting a reconstructed volume according to the energy spread of each of the plurality of sampling points.
    Type: Grant
    Filed: September 26, 2011
    Date of Patent: April 15, 2014
    Assignees: Siemens Corporation, Siemens Energy, Inc.
    Inventors: Jingdan Zhang, Moritz Michael Knorr, Guozhen Li, Shaohua Kevin Zhou, El Mahjoub Rasselkorde, Waheed A. Abbasi, Michael J. Metala
  • Publication number: 20130291640
    Abstract: An industrial ultrasonic inspection system is capable of scanning for discontinuities in relatively thick solid objects such as solid core steel alloy turbine shafts. A phased array probe located on the turbine shaft periphery transmits ultrasonic pulses in a sector-shaped scanning field within the shaft that includes the inner 50% core volume that is of special interest in non-destructive evaluation and inspection. Staggered pulse firing alone or in combination with variable pulse repetition frequency (PRF) may be utilized in order to balance image quality with inspection speed. Discontinuities are identified by analysis of reflected echo waveform energy. Discontinuity size and position within the inspected object is correlated with an equivalent reflector size (ERS) by the Distance-Gain-Size (DGS) method.
    Type: Application
    Filed: May 2, 2012
    Publication date: November 7, 2013
    Inventors: El Mahjoub Rasselkorde, Waheed A. Abbasi, Larry C. Himes
  • Patent number: 8525831
    Abstract: A method and apparatus for three-dimensional visualization and analysis for automatic non-destructive examination of a solid Rotor using ultrasonic phased array is disclosed. Data is acquired by scanning a solid rotor with a phased array ultrasound transducer producing a plurality of two dimensional ultrasound scans. Each of a plurality of sample points of a plurality of two dimensional ultrasound scans are associated with a corresponding 3D image point of a regular grid. A kernel function for each of the plurality of sample points defining a size and shape of a kernel located at the corresponding image point is determined. A weight is assigned to each kernel which, in one embodiment, is based on the sample point value. A value for each image point of the regular 3D grid is determined based on kernels overlapping each image point. A three-dimensional volume representing the solid rotor is then visualized.
    Type: Grant
    Filed: October 5, 2010
    Date of Patent: September 3, 2013
    Assignees: Siemens Corporation, Siemens Energy, Inc.
    Inventors: Jingdan Zhang, Moritz Michael Knorr, Shaohua Kevin Zhou, Waheed A. Abbasi, Michael F. Fair, Larry C. Himes, Michael J. Metala, El Mahjoub Rasselkorde
  • Publication number: 20120128266
    Abstract: An image reconstruction method includes receiving volume data comprising a plurality of sampling points, determining a first conditioning of the sampling points suppressing low amplitudes and conserving maximum amplitudes, determining a second conditioning of the sampling points wherein an influence of a sampling point depends on its distance to a grid point in a sampling grid, determining a kernel comprising a plurality of weighting functions for the first conditioning and the second conditioning to determine an energy spread of each of the plurality of sampling points without determining a shape or size of the kernel, and outputting a reconstructed volume according to the energy spread of each of the plurality of sampling points.
    Type: Application
    Filed: September 26, 2011
    Publication date: May 24, 2012
    Applicants: Siemens Energy, Inc., Siemens Corporation
    Inventors: Jingdan Zhang, Moritz Michael Knorr, Guozhen Li, Shaohua Kevin Zhou, El Mahjoub Rasselkorde, Waheed A. Abbasi, Michael J. Metala
  • Publication number: 20110109627
    Abstract: A method and apparatus for three-dimensional visualization and analysis for automatic non-destructive examination of a solid Rotor using ultrasonic phased array is disclosed. Data is acquired by scanning a solid rotor with a phased array ultrasound transducer producing a plurality of two dimensional ultrasound scans. Each of a plurality of sample points of a plurality of two dimensional ultrasound scans are associated with a corresponding 3D image point of a regular grid. A kernel function for each of the plurality of sample points defining a size and shape of a kernel located at the corresponding image point is determined. A weight is assigned to each kernel which, in one embodiment, is based on the sample point value. A value for each image point of the regular 3D grid is determined based on kernels overlapping each image point. A three-dimensional volume representing the solid rotor is then visualized.
    Type: Application
    Filed: October 5, 2010
    Publication date: May 12, 2011
    Applicants: Siemens Corporation, Siemens Energy, Inc.
    Inventors: Jingdan Zhang, Moritz Michael Knorr, Shaohua Kevin Zhou, Waheed A. Abbasi, Michael F. Fair, Larry C. Himes, Michael J. Metala, El Mahjoub Rasselkorde