Patents by Inventor Waheed A. Abbasi
Waheed A. Abbasi 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).
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Patent number: 10295501Abstract: 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: GrantFiled: October 30, 2014Date of Patent: May 21, 2019Assignee: SIEMENS ENERGY, INC.Inventors: El Mahjoub Rasselkorde, Michael F. Fair, David S. Segletes, Erik A. Lombardo, Scott M. Westby-Gibson, Waheed A. Abbasi
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Patent number: 9835596Abstract: 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: GrantFiled: January 3, 2014Date of Patent: December 5, 2017Assignee: 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
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Patent number: 9792555Abstract: 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: GrantFiled: December 16, 2013Date of Patent: October 17, 2017Assignee: 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
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Patent number: 9658192Abstract: 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: GrantFiled: January 16, 2013Date of Patent: May 23, 2017Assignees: Siemens Corporation, Siemens Energy, Inc.Inventors: Xuefei Guan, Jingdan Zhang, Shaohua Kevin Zhou, Mark W. Fischer, Waheed A. Abbasi, Scott A. Karstetter, Christopher John William Adams
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Patent number: 9575034Abstract: 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: GrantFiled: March 12, 2014Date of Patent: February 21, 2017Assignee: SIEMENS ENERGY, INC.Inventors: El Mahjoub Rasselkorde, Michael F. Fair, Francisco J. Jaimes, Waheed A. Abbasi, James A. Bauer
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Publication number: 20160123932Abstract: 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: ApplicationFiled: October 30, 2014Publication date: May 5, 2016Inventors: El Mahjoub Rasselkorde, Michael F. Fair, David S. Segletes, Erik A. Lombardo, Scott M. Westby-Gibson, Waheed A. Abbasi
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Patent number: 9177371Abstract: Interactive virtual inspection of modeled objects is provided. A graphic user interface facilitates interaction between a Data Visualization and Analysis application and the inspector. The Data Visualization and Analysis application acquires non-destructive examination data that is collected with reference to an industrial component under evaluation. The acquired non-destructive examination data is transformed into a visualization defined by a volumetric representation that is rendered on at least one display device as at least one view representative of the component under evaluation. The inspector may navigate the volumetric representation to investigate the integrity of the industrial component including non-surface conditions thereof.Type: GrantFiled: May 21, 2009Date of Patent: November 3, 2015Assignee: Siemens Energy, Inc.Inventors: Michael J. Metala, Waheed A. Abbasi
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Publication number: 20150260690Abstract: 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: ApplicationFiled: March 12, 2014Publication date: September 17, 2015Applicant: Siemens Energy, Inc.Inventors: El Mahjoub Rasselkorde, Michael F. Fair, Francisco J. Jaimes, Waheed A. Abbasi, James A. Bauer
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Patent number: 8839673Abstract: 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: GrantFiled: May 2, 2012Date of Patent: September 23, 2014Assignee: Siemens Energy, Inc.Inventors: El Mahjoub Rasselkorde, Waheed A. Abbasi, Larry C. Himes
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Publication number: 20140229149Abstract: 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: ApplicationFiled: December 16, 2013Publication date: August 14, 2014Applicants: SIEMENS CORPORATION, SIEMENS ENERGY, INC., SIEMENS AKTIENGESELLSCHAFTInventors: 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
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Patent number: 8805625Abstract: A method and apparatus for three-dimensional (3D) visualization and analysis for automatic non-destructive examination of a rotor bore using ultrasound. Data is acquired by scanning the rotor bore with an ultrasound pulser/transducer producing a plurality of one-dimensional ultrasound scans, each scan having a plurality of sample points. Each sample point is associated with a voxel of a regular 3D grid having a plurality of voxels. A Gaussian kernel is associated with each sample point and a value for a particular voxel is determined based on a weighted sum of sample points whose kernels cover the particular voxel. The values for the other voxels of the regular 3D grid are determined similarly. A 3D visualization of the rotor bore can be displayed to a user.Type: GrantFiled: October 13, 2010Date of Patent: August 12, 2014Assignees: Siemens Corporation, Siemens Energy, Inc.Inventors: Jingdan Zhang, Shaohua Kevin Zhou, Waheed A. Abbasi, Chris Vierck, Peter Faltin, Daniel S. Morgan, Larry C. Himes, Dorin Comaniciu, Michael J. Metala
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Publication number: 20140200853Abstract: 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: ApplicationFiled: January 3, 2014Publication date: July 17, 2014Applicants: SIEMENS ENERGY, INC., SIEMENS CORPORATIONInventors: Xuefei Guan, Jingdan Zhang, Shaohua Kevin Zhou, El Mahjoub Rasselkorde, Waheed A. Abbasi, Steve H. Radke, Chin-Sheng Lee, Ashley L. Lewis
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Patent number: 8699817Abstract: 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: GrantFiled: September 26, 2011Date of Patent: April 15, 2014Assignees: 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
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Publication number: 20130291640Abstract: 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: ApplicationFiled: May 2, 2012Publication date: November 7, 2013Inventors: El Mahjoub Rasselkorde, Waheed A. Abbasi, Larry C. Himes
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Patent number: 8525831Abstract: 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: GrantFiled: October 5, 2010Date of Patent: September 3, 2013Assignees: 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
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Publication number: 20130191041Abstract: 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: ApplicationFiled: January 16, 2013Publication date: July 25, 2013Applicants: Siemens Energy, Inc., Siemens CorporationInventors: Xuefei Guan, Jingdan Zhang, Shaohua Kevin Zhou, Mark W. Fischer, Waheed A. Abbasi, Scott A. Karstetter, Christopher John William Adams
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Patent number: 8438929Abstract: A phased array ultrasonic testing system for examining discontinuities in turbine or generator rotor bores formed within turbine or generator rotors of a turbine or generator rotor assembly. The system includes a phased array ultrasonic transducer structured to be coupled to a surface of the rotor bore at a first location in order to emit an ultrasonic beam toward a second location of the rotor bore which is to be examined. The system further includes a control system with a computer and a controller for programming, emitting, and steering the ultrasonic beam via at least one, two-dimensional phased array transducer, thereby precisely and accurately inspecting the area of interest. Computer control of the beam permits the number of inspection locations and the number of different transducer wedges to be reduced providing for an efficient, timely inspection.Type: GrantFiled: September 2, 2010Date of Patent: May 14, 2013Assignee: Siemens Energy, Inc.Inventors: Michael J. Metala, Waheed A. Abbasi
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Publication number: 20120128266Abstract: 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: ApplicationFiled: September 26, 2011Publication date: May 24, 2012Applicants: Siemens Energy, Inc., Siemens CorporationInventors: Jingdan Zhang, Moritz Michael Knorr, Guozhen Li, Shaohua Kevin Zhou, El Mahjoub Rasselkorde, Waheed A. Abbasi, Michael J. Metala
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Publication number: 20120055255Abstract: A phased array ultrasonic testing system for examining discontinuities in turbine or generator rotor bores formed within turbine or generator rotors of a turbine or generator rotor assembly. The system includes a phased array ultrasonic transducer structured to be coupled to a surface of the rotor bore at a first location in order to emit an ultrasonic beam toward a second location of the rotor bore which is to be examined. The system further includes a control system with a computer and a controller for programming, emitting, and steering the ultrasonic beam via at least one, two-dimensional phased array transducer, thereby precisely and accurately inspecting the area of interest. Computer control of the beam permits the number of inspection locations and the number of different transducer wedges to be reduced providing for an efficient, timely inspection.Type: ApplicationFiled: September 2, 2010Publication date: March 8, 2012Inventors: Michael J. Metala, Waheed A. Abbasi
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Publication number: 20110109627Abstract: 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: ApplicationFiled: October 5, 2010Publication date: May 12, 2011Applicants: 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