Stress Or Strain Measurement Patents (Class 702/42)
  • Patent number: 10752341
    Abstract: A method of tip clearance estimation for a rotor blade is provided. The method includes measuring blade deflection of the rotor blade, generating a harmonic function for the rotor blade from the measured blade deflection, predicting tip displacement of the rotor blade using the generated harmonic function and adjusting a position of the rotor blade according to the predicted tip displacement.
    Type: Grant
    Filed: December 21, 2015
    Date of Patent: August 25, 2020
    Assignee: SIKORSKY AIRCRAFT CORPORATION
    Inventors: Derek Geiger, Jeremy Frimpong Banning
  • Patent number: 10732073
    Abstract: The invention is a method for obtaining the curved displacement of a flexible structure by using strain measurements obtained by strain sensors. By obtaining the displacement of structures in this manner, one may accurately construct the deformed shape of the structure under large geometric nonlinear deformations and display said deformed shape in real-time, enabling active control of the structure shape if desired.
    Type: Grant
    Filed: October 4, 2017
    Date of Patent: August 4, 2020
    Assignee: U.S.A. as Represented by the Administration of the National Aeronautics and Space Administration
    Inventors: William L Ko, Van T Fleischer, Shun-Fat Lung
  • Patent number: 10704972
    Abstract: A method for measuring the applied load on a towing hook/or a tow bar accessory of a towing hook arrangement for a vehicle, and a towing hook arrangement for a vehicle. The towing hook arrangement comprises a towing hook and/or a tow bar accessory arranged on a tow bar, the towing hook arrangement also comprises a sensor arrangement having at least one actuator and at least one sensor, the sensor arrangement is adapted to detect an imparted vibration on the tow bar and use the detected imparted vibration to determine the applied load on the towing hook and/or the tow bar accessory.
    Type: Grant
    Filed: February 23, 2016
    Date of Patent: July 7, 2020
    Assignee: BRINK TOWING SYSTEMS B.V.
    Inventor: Teunis Lassche
  • Patent number: 10612911
    Abstract: A method and system for rendering the quaternion shape and orientation of a three-dimensional structure. The proposed system and method keeps track of twist/roll angles and updates its effect on pitch and yaw orientations. The system relies on a single or multi-core optical fiber or multi-fiber bundle containing fiber Bragg grating sensors (FBGs) arrayed in rosettes at 45° deltas and spaced at uniform intervals along the entire length of the structure to be monitored. A tunable laser is used to interrogate the sensors using optical frequency domain reflectometry (OFDR), which detects shifts in the wavelength reflected by the sensors in response to strain on the fibers. Each sensor is continuously queried by software which determines the strain magnitude (?L/L) for each fiber at a given triplet. Given these measured strain values, the software implements a novel quaternion approach to rendering the 3D shape of the fiber including twist.
    Type: Grant
    Filed: September 4, 2018
    Date of Patent: April 7, 2020
    Assignee: United States of America as Represented by the Administrator of the National Aeronautics and Space Administration
    Inventors: Francisco Pena, III, Allen R. Parker, Jr., William Lance Richards, Hon Man Chan
  • Patent number: 10605854
    Abstract: A method of monitoring the health of a semiconductor power electronic switch such as an insulated gate bipolar transistor (IGBT) is provided. The method having the steps of: measuring one or more parameters selected from the group consisting of: a rate of change of voltage ( dV dt ) across the switch; a rate of change of current ( di dt ) through the switch, a charge present on a gate of the switch (QG), a peak overshoot voltage (VPO) across the switch, and a peak overshoot or reverse recovery current (IRR) through the switch; and estimating the health of the switch based on the measured parameter(s).
    Type: Grant
    Filed: May 16, 2017
    Date of Patent: March 31, 2020
    Assignee: ROLLYS-ROYCE plc
    Inventors: Mohamed Halick Mohamed Sathik, Chandana Jayamapathi Gajanayake, Shantha Dharmasiri Gamini Jayasinghe, Amit Kumar Gupta, Rejeki Simanjorang
  • Patent number: 10589431
    Abstract: Provided is a strain sensor which includes: a linear bearing including a first member and a second member which are supported such that the first member and the second member are relatively movable only in an axial direction of a predetermined axis; a connecting member including fixed portions, which are respectively fixed to the first member and the second member, and a strain generation portion which connects the fixed portions with each other; and a strain detecting element disposed on the connecting member so as to be capable of detecting strain in at least a moving direction.
    Type: Grant
    Filed: November 28, 2018
    Date of Patent: March 17, 2020
    Assignee: FANUC CORPORATION
    Inventor: Kazutaka Nakayama
  • Patent number: 10595399
    Abstract: An organic substrate includes a core layer including organic materials; a first buildup layer on a top surface of the core layer; a second buildup layer on a bottom surface of the core layer; and at least one correction layer formed on at least one part of surfaces of the first buildup layer and the second buildup layer, wherein the correction layer has a thickness which has been calculated using properties of constituent materials including the coefficient of thermal expansion (CTE) and the Young's modulus of the core layer, and CTEs and the Young's modulus of the first and the second buildup layers for reducing warpage of the organic substrate.
    Type: Grant
    Filed: January 16, 2018
    Date of Patent: March 17, 2020
    Assignee: INTERNATIONAL BUSINESS MACHINES CORPORATION
    Inventors: Sayuri Hada, Hiroyuki Mori, Keishi Okamoto
  • Patent number: 10578144
    Abstract: An Internet of Thing (IoT) device includes a head portion; an elongated stress sensor coupled to the head portion, the stress sensor coupled to a surface; a processor coupled to the stress sensor; and a wireless transceiver coupled to the processor.
    Type: Grant
    Filed: April 16, 2019
    Date of Patent: March 3, 2020
    Inventors: Bao Tran, Ha Tran
  • Patent number: 10543721
    Abstract: A method of operating a Tire Pressure Monitoring System (TPMS) includes executing tire pressure monitoring of at least one tire installed on a vehicle in a first mode, and transmitting frequency signal loss information to a center if a loss of a frequency signal in the first mode occurs in a designated time period.
    Type: Grant
    Filed: December 20, 2016
    Date of Patent: January 28, 2020
    Assignee: HYUNDAI MOTOR COMPANY
    Inventor: Sung Ho Choi
  • Patent number: 10521527
    Abstract: An apparatus is provided for analysis of a leading edge rib of a fixed leading edge section of an aircraft wing. The apparatus may identify geometric or inertial properties of a plurality of stiffeners of the rib, and based thereon perform an analysis to predict a failure rate of the leading edge rib under an external load. From the failure rate, the apparatus may determine a structural integrity of the leading edge rib under the external load. Performing the analysis may include importing a plurality of section cuts into a finite element model of the rib and thereby identifying nodes proximate the section cuts. Under an external load, internal load distributions may be extracted from elements proximate the nodes and elements, and the failure rate of the leading edge rib under the external load may be predicted based on the internal load distributions of the elements.
    Type: Grant
    Filed: June 24, 2016
    Date of Patent: December 31, 2019
    Assignee: The Boeing Company
    Inventors: Eric S. Lester, Michael A. O'Grady, Alan N. Baumgarten, Navin Kumar, Venkata Narasimha Ravi Udali, Sachin Kulshrestha, Tejoram Bhagavathula
  • Patent number: 10521551
    Abstract: A method is provided that includes providing a first digital representation of a first member and a second digital representation of a second member. The first member and the second member are configured to be joined. The method also includes aligning the first digital representation and the second digital representation in a same coordinate system. Further, the method includes determining, in the coordinate system, a virtual deformation corresponding to at least one of the first digital representation or the second digital representation corresponding to an applied loading. Also, the method includes determining shim dimensions for a shim to be interposed between the first member and the second member based on the virtual deformation. The method further includes fabricating a shim having the shim dimensions.
    Type: Grant
    Filed: November 16, 2015
    Date of Patent: December 31, 2019
    Assignee: The Boeing Company
    Inventors: Don Michael Clark, Joshua Gerritt Letendre, Steven Elsdon Larson
  • Patent number: 10458881
    Abstract: This internal pressure loading system includes an internal pressure loading device and an information processing device. The internal pressure loading device is set at an inner face of a pipe, and includes a load meter which detects the load applied to the inner face of the pipe and a displacement meter which detects the deformation amount of the pipe. When the internal pressure loading device is expanded so as to increase the load to be detected by the load meter, the width of the pipe at which the displacement meter is located is reduced. On the basis of the load detected by the load meter and the deformation amount detected by the displacement meter, the information processing device evaluates the remaining strength of the pipe.
    Type: Grant
    Filed: January 25, 2017
    Date of Patent: October 29, 2019
    Assignees: NATIONAL UNIVERSITY CORPORATION TOTTORI UNIVERSITY, NATIONAL UNIVERSITY CORPORATION SHIMANE UNIVERSITY
    Inventors: Masahiro Hyodo, Hidehiko Ogata, Naoki Kawamura, Tsuguhiro Nonaka, Masayuki Ishii
  • Patent number: 10426541
    Abstract: A device (1) assisting with the placement of an orthopedic instrument (2) intended to be inserted in a receiving bone (3) by impaction, by means of an impacter (10) comprising at least one striking surface (11) designed to come into contact with an impact surface coupled to said orthopedic instrument in order to apply an impaction force to said orthopedic instrument (2), said device being characterized in that it comprises a force sensor (12) able to measure, upon each impact, said impaction force applied by the impacter (10) to said impact surface and to supply a measurement signal indicative of the temporal variation of said applied impaction force, said force sensor (12) being connected to processing means (30) designed to determine, on the basis of the temporal variation of said impaction force supplied for each impact in succession, an indicator representative of the degree of insertion of said orthopedic instrument (2) in the receiving bone (3).
    Type: Grant
    Filed: April 2, 2015
    Date of Patent: October 1, 2019
    Assignee: CENTRE NATIONAL DE LA RECHERCHE SCIENTIFIQUE (CNRS)
    Inventors: Guillaume Haiat, Vincent Mathieu, Adrien Michel
  • Patent number: 10354023
    Abstract: A method and apparatus for transforming a finite element model is provided. A set of joint elements to the finite element model of a structure is created at a set of joint locations in the finite element model of the structure. A local coordinate system is assigned to each of the set of joint elements that is independent of a global coordinate system of the finite element model to generate a transformed finite element model. The transformed finite element model is generated with improved consistency and efficiency.
    Type: Grant
    Filed: December 10, 2014
    Date of Patent: July 16, 2019
    Assignee: The Boeing Company
    Inventors: Saif Sultan, Weidong Song, Nooshin M. Khalili
  • Patent number: 10311202
    Abstract: A fatigue life management system for determining a remaining fatigue life of a component of an aircraft. The fatigue life management system may generate probability density functions of minimum load, maximum load, and timeframe damage for predetermined time intervals based on selected flight data of the aircraft and regression models for probabilistic prediction of minimum load, maximum load, and timeframe damage of the component. The fatigue life management system may further compute an accumulated fatigue damage estimation based on the probability density functions and a probabilistic fatigue strength model. The fatigue life management system may then generate a distribution of the accumulated fatigue damage estimation of the component. If desired, the processing circuit may compare the distribution of the accumulated fatigue damage estimation with a reliability requirement to determine the remaining fatigue life of the component.
    Type: Grant
    Filed: April 11, 2016
    Date of Patent: June 4, 2019
    Assignee: AIRBUS HELICOPTERS DEUTSCHLAND GMBH
    Inventors: Sam Dekker, Georg Wurzel
  • Patent number: 10295438
    Abstract: An apparatus is provided for analysis of a leading edge rib of a fixed leading edge section of an aircraft wing. The apparatus may identify geometric or inertial properties of a plurality of stiffeners of the rib in which respective stiffeners are represented by a collection of geometry within a solid model of the rib, and perform an analysis to predict a failure rate of the leading edge rib under an external load. From the failure rate, the apparatus may determine a structural integrity of the leading edge rib under the external load. Identifying the properties may include, extracting a section cut of the geometry that corresponds to and has one or more properties of the respective stiffener, and identifying the properties of the cross-section and thereby the respective stiffener based on a correlation of the cross-section to a generic profile of a plurality of different cross-sections.
    Type: Grant
    Filed: June 24, 2016
    Date of Patent: May 21, 2019
    Assignee: The Boeing Company
    Inventors: Eric S. Lester, Michael A. O'Grady, Alan N. Baumgarten, Navin Kumar, Venkata Narasimha Ravi Udali, Sachin Kulshrestha, Tejoram Bhagavathula
  • Patent number: 10285762
    Abstract: A computer implemented method for assessing an arterio-venous malformation (AVM) may include, for example, receiving a patient-specific model of a portion of an anatomy of a patient; using a computer processor to analyze the patient-specific model for identifying one or more blood vessels associated with the AVM, in the patient-specific model; and estimating a risk of an undesirable outcome caused by the AVM, by performing computer simulations of blood flow through the one or more blood vessels associated with the AVM in the patient-specific model.
    Type: Grant
    Filed: May 11, 2018
    Date of Patent: May 14, 2019
    Assignee: HeartFlow, Inc.
    Inventors: Sethuraman Sankaran, Christopher K. Zarins, Leo Grady
  • Patent number: 10270137
    Abstract: The present invention extends to methods, systems, devices, apparatus, and computer program products for detecting battery status and failure. In general, detecting mechanical swelling of a battery cell along with optional measurement of temperature increases can be used to identify a battery cell as failing or failed. Force strain sensors or similar extension/compression sensors can be mounted in a (e.g., fire resistant) sleeve surround a battery pack and/or between cells in a battery pack. In some embodiments, extension/compression sensors are used along with temperature probes to detect battery cell failure.
    Type: Grant
    Filed: March 27, 2015
    Date of Patent: April 23, 2019
    Assignee: Olaeris, Inc.
    Inventor: Paul E. I. Pounds
  • Patent number: 10168685
    Abstract: A method for applying stress conditions to integrated circuit device samples during accelerated stress testing may include partitioning each of the integrated circuit device samples into a first region having a first functional element, partitioning each of the integrated circuit device samples into at least one second region having at least one second functional element, applying a first stress condition to the first region having the first element, applying a second stress condition to the at least one second region having the at least one second element, determining a first portion of the integrated circuit device samples that functionally failed based on the first stress condition, and determining a second portion of the integrated circuit device samples that functionally failed based on the second stress condition. An acceleration model parameter is derived based on the determining of the first and second portion of the integrated circuit samples that functionally failed.
    Type: Grant
    Filed: October 4, 2016
    Date of Patent: January 1, 2019
    Assignee: International Business Machines Corporation
    Inventors: Mark A. Burns, Douglas S. Dewey, Nazmul Habib, Daniel D. Reinhardt
  • Patent number: 10161892
    Abstract: A method of analyzing press-forming of a press-forming material including analyzing press-forming, analyzing springback and analyzing a change in shape of the press-forming material. The analyzing press-forming may include setting an initial temperature distribution for the heated press-forming material and performing a press-forming analysis by combining temperature analysis and structural analysis to obtain shape information, temperature distribution, stress distribution, and strain distribution. The analyzing springback may occur with and without consideration of contact heat transfer between a press-forming tool and the press-forming material. The method may further include modifying the temperature distribution obtained in the analyzing springback and then re-analyzing the change in shape of the press-forming material. The analyzing the change in shape may be performed until a temperature distribution in the press-forming material is within the range of ±5° C.
    Type: Grant
    Filed: February 8, 2013
    Date of Patent: December 25, 2018
    Assignee: JFE STEEL CORPORATION
    Inventors: Toru Minote, Yuichi Tokita, Yoshikiyo Tamai, Takeshi Fujita
  • Patent number: 10069451
    Abstract: A unit for recording operating information of an electronically commutated motor (ECM) is described. The unit includes a system controller communicatively coupled to an ECM. The system controller includes a processing device configured to control the unit. The unit also includes a memory device communicatively coupled to the system controller. The memory device is configured to receive and store ECM operating information provided by the processing device.
    Type: Grant
    Filed: March 16, 2017
    Date of Patent: September 4, 2018
    Assignee: Regal Beloit America,Inc.
    Inventors: Brian L. Beifus, Paul N. Selking, Vijay D. Gurudasani, Michael R. Koller
  • Patent number: 10020546
    Abstract: A device for managing an accumulator, including: a plurality of strain gauges including at least three strain gauges, the strain gauges being arranged to measure stresses along at least three distinct stress axes; a measuring device measuring strains undergone by each gauge along its stress axis; a reversible electrical switch; a calculating device controlling opening and closing of the electrical switch, depending on measurements carried out by the measuring device.
    Type: Grant
    Filed: April 23, 2014
    Date of Patent: July 10, 2018
    Assignee: Commissariat à l'énergie atomique et aux énergies alternatives
    Inventors: Sylvie Genies, Melanie Alias, Caroline Coutier, Estelle Le Baron, Sophie Mailley
  • Patent number: 10012555
    Abstract: A method of identifying a cause of springback includes a step of performing a press forming analysis, a step of performing a springback analysis on the basis of information acquired by the press forming analysis, a step of dividing a shape of a press forming product acquired by the press forming analysis into a plurality of regions, a step of changing Young's modulus in a designated direction in any region of the divided regions, a step of performing the springback analysis on the press forming product whose Young's modulus is changed, a step of acquiring springback amount differences on the basis of multiple springback analysis results, and a step of identifying the cause of the springback on the basis of the acquired springback amount differences.
    Type: Grant
    Filed: August 15, 2013
    Date of Patent: July 3, 2018
    Assignee: JFE STEEL CORPORATION
    Inventors: Satoshi Sumikawa, Akinobu Ishiwatari
  • Patent number: 9989498
    Abstract: Methods and apparatus, including computer program products, are provided for nonlinear ultrasonic testing. In one aspect there is provided a method, which may include generating at least one ultrasonic wave to enable the at least one ultrasonic wave to propagate through a solid; detecting the at least one ultrasonic wave propagating through the solid; and determining a stress of the solid based on at least one of an imaginary component of a wavenumber, a wave amplitude, a wave strength, a statistical moment in a time domain, or a statistical moment in a frequency domain of the at least one ultrasonic wave.
    Type: Grant
    Filed: February 5, 2014
    Date of Patent: June 5, 2018
    Assignee: The Regents Of The University of California
    Inventors: Francesco Lanza di Scalea, Claudio Nucera
  • Patent number: 9977819
    Abstract: System, methods and articles of manufacture for replicating relational data on multiple nodes. An embodiment comprises receiving an update request message from a node, wherein the update request message comprises a node identification and an application identification, accessing an application schema based on the application identification, identifying a partition residing in the application schema based on the node identification, accessing a server schema, identifying a second partition residing in the server schema based on the application identification, determining at least one data change stored in the second partition that changes data associated with the first partition, retrieving at least one data change from the second partition, formatting data change in an update response message, and transmitting the update response message to the node.
    Type: Grant
    Filed: August 9, 2010
    Date of Patent: May 22, 2018
    Assignee: iAnywhere Solutions, Inc.
    Inventors: Thomas Stephen Slee, James David Graham, Adam Hurst
  • Patent number: 9874504
    Abstract: A bending fracture limit stress is calculated for each of (bend radius at sheet thickness center of a metal sheet)/(initial sheet thickness of the metal sheet); a fracture limit curve and a fracture limit stress are calculated from work hardening characteristics; a fracture limit curve corresponding to (the metal sheet bend radius at sheet thickness center)/(the initial sheet thickness of the metal sheet) is calculated; a corresponding fracture limit stress is calculated from stress of the element subject to determination and the fracture limit curve; a risk ratio that is a ratio between the stress of the element subject to determination and the fracture limit stress is computed; and performing fracture determination for the element subject to determination based on the risk ratio.
    Type: Grant
    Filed: June 26, 2014
    Date of Patent: January 23, 2018
    Assignee: NIPPON STEEL & SUMITOMO METAL CORPORATION
    Inventors: Shigeru Yonemura, Takuya Kuwayama, Akihiro Uenishi, Toshiyuki Niwa
  • Patent number: 9851417
    Abstract: A structure having collocated magnetic field sensing elements can be used to simultaneously determine magnetic field and mechanical stress. A primary magnetic field sensing element generates a primary signal responsive to a magnetic field and a secondary magnetic field sensing element generates a secondary signal responsive to mechanical stress. A system includes a stress compensation module to receive the primary and signals, and to compensate for mechanical stress in the primary signal.
    Type: Grant
    Filed: July 28, 2015
    Date of Patent: December 26, 2017
    Assignee: Allegro MicroSystems, LLC
    Inventors: Steven Kosier, Gregory Delmain
  • Patent number: 9839483
    Abstract: A computer implemented method for assessing an arterio-venous malformation (AVM) may include, for example, receiving a patient-specific model of a portion of an anatomy of a patient; using a computer processor to analyze the patient-specific model for identifying one or more blood vessels associated with the AVM, in the patient-specific model; and estimating a risk of an undesirable outcome caused by the AVM, by performing computer simulations of blood flow through the one or more blood vessels associated with the AVM in the patient-specific model.
    Type: Grant
    Filed: September 2, 2015
    Date of Patent: December 12, 2017
    Assignee: HEARTFLOW, INC.
    Inventors: Sethuraman Sankaran, Christopher Zarins, Leo J. Grady
  • Patent number: 9798838
    Abstract: Method and system of determining ground-to-tire friction coefficient for an aircraft landing event. The method uses an aircraft computational model to repeatedly model the landing event, varying one or more initial conditions of the aircraft model until a best match between a modelled value and a provided value of aircraft vertical acceleration is determined. The method uses initial conditions associated with the best match of modelled and provided vertical acceleration values and a strain value from a sensor on the aircraft landing gear, with the ground-to-tire friction coefficient is a variable. The method models the landing gear to generate a modelled strain value and compares this with the measured strain value, and repeats the landing gear modelling step with a different value for the ground-to-tire friction coefficient until a best match between the modelled strain value and the measured strain value is determined and outputting the respective friction coefficient value.
    Type: Grant
    Filed: March 16, 2012
    Date of Patent: October 24, 2017
    Assignee: Safran Landing Systems UK LTD
    Inventors: Laura Collett, Kyle R. Schmidt, Pia Sartor
  • Patent number: 9789979
    Abstract: A system for calculating forces exerted into an aircraft component includes a test hinge assembly and a monitoring system. In at least one embodiment, the test hinge assembly is a triangular shaped assembly, and includes at least one beam, at least one connecting joint having a channel configured to receive and retain a fastening member, and at least one strain gage secured to an outer surface of the beam(s). The strain gage(s) is configured to detect one or more strains exerted into the beam(s). The monitoring system is in communication with the strain gage(s). The monitoring system is configured to calculate forces exerted into the fastening member(s) by analyzing the strain(s) exerted into the beam(s).
    Type: Grant
    Filed: July 11, 2014
    Date of Patent: October 17, 2017
    Assignee: The Boeing Company
    Inventors: Brian S. Oelke, James A. Williams, Robert Johnson, Shahzad Aminzadeh, Matt R. Dickerson
  • Patent number: 9743720
    Abstract: A fastener for fastening a first element to a second element comprising: a first part; a second part fastenable to the first part via a first fastening mechanism; and a third part fastenable to the second part via a second fastening mechanism. The third part comprises at least one protruding member for inserting thereof to the second element for fastening the second element between the second and third parts. The first fastening mechanism is configured such that to open the fastening of the first part to the second part an external tool such as a key or a magnet should be applied.
    Type: Grant
    Filed: January 27, 2015
    Date of Patent: August 29, 2017
    Assignee: ANGEL SENSE LTD.
    Inventors: Eyal Benjamin Zur, Nery Ben Azar
  • Patent number: 9733075
    Abstract: A method and device for evaluating inhomogeneous deformations in a first wafer bonded by molecular adhesion to a second wafer. This evaluation method includes the steps of making at least one reading of a plurality of measurement points, the reading corresponding to a surface profile of the first wafer along a predefined direction and over a predefined length, computing a second derivative from the measurement points of the surface profile and evaluating a level of inhomogeneous deformations in the first wafer according to the second derivative.
    Type: Grant
    Filed: January 24, 2011
    Date of Patent: August 15, 2017
    Assignee: Sony Semiconductors Solutions Corporation
    Inventors: Marcel Broekaart, Arnaud Castex, Laurent Marinier
  • Patent number: 9679856
    Abstract: According to an embodiment, a micro-fabricated test structure includes a structure mechanically coupled between two rigid anchors and disposed above a substrate. The structure is released from the substrate and includes a test layer mechanically coupled between the two rigid anchors. The test layer includes a first region having a first cross-sectional area and a constricted region having a second cross-sectional area smaller than the first cross-sectional area. The structure also includes a first tensile stressed layer disposed on a surface of the test layer adjacent the first region.
    Type: Grant
    Filed: March 7, 2014
    Date of Patent: June 13, 2017
    Assignee: Infineon Technologies AG
    Inventors: Christoph Glacer, Alfons Dehe, John Brueckner
  • Patent number: 9651471
    Abstract: Defects in ferromagnetic materials are detected and characterized by analyzing the items' magnetic fields to find portions of the magnetic fields that differ in characteristic ways from residual magnetic fields generated by non-defective portions of the items. The portions of the magnetic fields that differ in the characteristic ways correspond to locations of the defects. The residual magnetic fields correspond to portions of the items distant from the defects. The defect characterization may include volume of material lost due to each defect and/or width and/or depth of each defect.
    Type: Grant
    Filed: May 15, 2015
    Date of Patent: May 16, 2017
    Assignee: The Charles Stark Draper Laboratory, Inc.
    Inventors: Almir D. Davis, William J. Trinkle, Donald Gustafson, Philip S. Babcock, IV, Richard T. Berthold
  • Patent number: 9639530
    Abstract: According to one embodiment, an apparatus for measuring a component supported on a fixture includes a housing, a wireless transceiver coupled to the housing, a radio frequency identification (RFID) reader coupled to the housing, and a magnet coupled to the housing. The magnet is magnetically attracted to a portion of the fixture to removably secure the housing to the fixture.
    Type: Grant
    Filed: September 12, 2014
    Date of Patent: May 2, 2017
    Assignee: The Boeing Company
    Inventors: Jonathan B. Vance, Andrew J. Martignoni, III, Ken Nguyen
  • Patent number: 9625823
    Abstract: A system and method for local film stress calculation is disclosed. The method may include specifying a plurality of measurement points on a substrate, the substrate being configured to receive a film deposition; obtaining a local film thickness measurement for each measurement point; obtaining a local wafer shape parameter for each measurement point; and calculating a local film stress value for each measurement point based on the local film thickness measurement and the local wafer shape parameter for each corresponding measurement point. The method may further include specifying a plurality of estimation points on the substrate; obtaining a local wafer shape parameter for each estimation point; calculating an estimated local film thickness for each estimation point; and calculating a local film stress value for each estimation point based on the estimated local film thickness and the local wafer shape parameter for each corresponding estimation point.
    Type: Grant
    Filed: April 27, 2011
    Date of Patent: April 18, 2017
    Assignee: KLA-Tencor Corporation
    Inventors: Torsten R. Kaack, Leonid Poslavsky, Yu Tay
  • Patent number: 9624766
    Abstract: A system and method to quantify damage to a gravel pack screen include the use of a flux leakage tool to record electromagnetic field measurements at a plurality of points on the gravel pack screen. The system also includes a processor to obtain the electromagnetic field measurements recorded at the plurality of points and to suppress a baseline signal associated with electromagnetic field measurements resulting from perforations of the gravel pack screen to isolate and quantify flux leakage resulting from the damage to the gravel pack screen from flux leakage resulting from the perforations.
    Type: Grant
    Filed: June 9, 2014
    Date of Patent: April 18, 2017
    Assignee: BAKER HUGHES INCORPORATED
    Inventors: Ian Draper, Bruce Girrell
  • Patent number: 9594002
    Abstract: The present invention relates to a method of monitoring a fluid carrying conduit, comprising interrogating an optic fiber positioned along the path of the conduit to provide distributed acoustic sensing, measuring by distributed acoustic sensing the acoustic signal at each of a plurality of discrete longitudinal sensing portions along the length of the optic fiber, to monitor the optic fiber for the presence of a first characteristic signal, the first characteristic signal being indicative of ground heave the vicinity of the optic fiber, and determining that a failure has occurred in the conduit when a first characteristic signal is measured in the distributed acoustic sensing.
    Type: Grant
    Filed: March 1, 2012
    Date of Patent: March 14, 2017
    Assignee: OPTASENSE HOLDINGS LIMITED
    Inventors: Alastair Godfrey, Philip Newton Winder
  • Patent number: 9581490
    Abstract: In some examples of monitoring pipeline integrity using fiber optics, a first set of values that represent an attenuation of a light signal transmitted through an optical fiber positioned adjacent a pipeline to carry fluids and a second set of values that represent a dispersion of the light signal transmitted through the optical fiber are received. An attenuation profile of the light signal and a dispersion profile of the light signal through the optical fiber are generated based on the first and second sets of values, respectively. Using the profiles, a light-based profile signature describing an environment surrounding the optical fiber is generated, and compared with a baseline light-based profile signature describing an environment surrounding the optical fiber under a normal operating condition. A notification describing an operation of the pipeline is provided in response to the comparing.
    Type: Grant
    Filed: April 17, 2014
    Date of Patent: February 28, 2017
    Assignee: Saudi Arabian Oil Company
    Inventors: Soliman A. Al-Walaie, Saleh M. Al-Saikhan
  • Patent number: 9489341
    Abstract: A prediction of an impending failure in a climate control system is based on degradation of a second harmonic in a temperature history of the system.
    Type: Grant
    Filed: April 18, 2013
    Date of Patent: November 8, 2016
    Assignee: The Boeing Company
    Inventors: Sidney Ly, Michael A. Bodach
  • Patent number: 9484791
    Abstract: A rotor parameter sensor is used for electric drives. A rotor of an electric engine or motor is monitored by a sensor sensing one or more physical observables or operation parameters. Furthermore, a method and system is used for monitoring an electric engine or motor for use in electric or hybrid vehicles.
    Type: Grant
    Filed: August 8, 2012
    Date of Patent: November 1, 2016
    Assignee: Infineon Technologies AG
    Inventors: Philip Georg Brockerhoff, Mattias Welponer
  • Patent number: 9447778
    Abstract: A method of detecting a fault mode of a sensor is provided. The sensor may be, for example, a bending moment sensor and may sense a bending moment of a blade on a wind turbine generator (WTG). The method includes comparing data output by a first sensor with reference data indicating what is expected to be output by the first sensor to produce a first comparison result and comparing data output by the first sensor with data output by a second sensor to produce a second comparison result. A determination of whether the first sensor has entered a fault mode is made based at least in part on the first and second comparison results.
    Type: Grant
    Filed: November 2, 2011
    Date of Patent: September 20, 2016
    Assignee: VESTAS WIND SYSTEMS A/S
    Inventors: Fabio Caponetti, Per Brath, Keld Hammerum, Johnny Nielsen
  • Patent number: 9328482
    Abstract: A method of optimizing machine performance in a plurality of load cases. According to the present invention, a maximum load case, which involves application of a maximum force to at least one member of a machine, is determined for the machine. For each of a plurality of member joints of the machine, a maximum member joint load is determined for the maximum load case for the machine. The machine is then operated by applying a force to the at least one member of the machine in each of the plurality of load cases so as not to exceed the maximum member joint load while exceeding the maximum force during at least one of the plurality of load cases.
    Type: Grant
    Filed: June 19, 2014
    Date of Patent: May 3, 2016
    Assignee: Flanders Electric Motor Service, Inc.
    Inventor: Richard L. Claxton
  • Patent number: 9281252
    Abstract: A method includes providing a semiconductor structure. An external mechanical stress is applied to the semiconductor structure. One or more semiconductor manufacturing processes are performed while the external mechanical stress is applied to the semiconductor structure. The one or more semiconductor manufacturing processes provide one or more material layers having an intrinsic stress at the semiconductor structure. After performing the one or more semiconductor manufacturing processes, the external mechanical stress is removed from the semiconductor structure. The removal of the external mechanical stress at least partially relaxes the intrinsic stress of the one or more material layers.
    Type: Grant
    Filed: October 24, 2014
    Date of Patent: March 8, 2016
    Assignee: GLOBALFOUNDRIES Inc.
    Inventors: Alexander Würfel, Moritz Andreas Meyer
  • Patent number: 9175955
    Abstract: A method of measuring an angle includes orienting a measurement device at a reference position characterized by a reference angle. A first panoramic image defined by a predetermined range of elevation angles is acquired where the first panoramic image includes an object. A first bearing of the object in relation to the reference angle is determined and the measurement device is rotated to a measurement position characterized by a measurement angle. A second panoramic image defined by the predetermined range of elevation angles is acquired where the second panoramic image includes the object. A second bearing of the object in relation to the reference angle is determined. The measurement angle is computed as a function of the first bearing and the second bearing.
    Type: Grant
    Filed: October 30, 2013
    Date of Patent: November 3, 2015
    Assignee: Trimble Navigation Limited
    Inventors: Michael Vogel, Omar Soubra, Darin Muncy
  • Patent number: 9157819
    Abstract: A wheel component force detecting apparatus for detecting a component force on a wheel includes a cylindrical axle flange, an electric motor, and a wheel unit. The electric motor includes a stator and an armature. The wheel component force detecting apparatus includes a pair of sensing units each including a cylinder and a bridge circuit. The cylinder is mounted outside the circumferential surface of the axle flange and has a first end fixed to the axle flange and a second end fixed to the stator. The bridge circuit includes a plurality of strain gages disposed on the cylinder. The pair of sensing units is symmetrical in the axial direction of the axle flange with respect to the stator.
    Type: Grant
    Filed: April 29, 2014
    Date of Patent: October 13, 2015
    Assignee: FUJI JUKOGYO KABUSHIKI KAISHA
    Inventor: Hiroshi Shimoyama
  • Patent number: 9081921
    Abstract: A computerized simulation method to obtain a loss tangent of a rubber compound comprising a rubber matrix and filler particles, wherein a model of the rubber compound is generated; as deformation conditions thereof, two different values of strain are defined; deformation simulations are made under the two different values of the strain, to compute a normal strain and a shear strain of each element under each of the two different values of the strain, and to compute an energy loss of each element by the use of the computed strain; and the loss tangent of the rubber compound is computed from the sum of the energy losses of all of the elements, a strain amplitude caused by the difference between the two different values of the strain, and an elastic modulus of the rubber compound model.
    Type: Grant
    Filed: April 13, 2012
    Date of Patent: July 14, 2015
    Assignee: SUMITOMO RUBBER INDUSTRIES, LTD.
    Inventor: Masato Naito
  • Publication number: 20150142342
    Abstract: A method determines isotropic stress by means of a Hall element which includes a plate-shaped area made of a doped semiconductor material and comprises four contacts contacting the plate-shaped area and forming corners of a quadrangle, two neighboring corners of the quadrangle defining an edge thereof. At least one van der Pauw transresistance value in at least one van der Pauw measurement set-up of the Hall element is determined, wherein the four contacts of the Hall element form contact pairs, a contact pair comprising two contacts defining neighbouring corners of the quadrangle. One contact pair supplies a current and the other contact pair measures a voltage. A relationship between the supplied current and the measured voltage defines the Van der Pauw transresistance value. The method comprises determining a stress signal which depends on the at least one Van der Pauw transresistance value and determining isotropic stress.
    Type: Application
    Filed: May 7, 2013
    Publication date: May 21, 2015
    Inventors: Samuel Huber, Johan Raman, Pieter Rombouts, Appolonius Jacobus Van Der Wiel
  • Patent number: 9037420
    Abstract: An internal residual stress calculating device includes a prediction unit that predicts a temporal variation in deformation which is received by a medium having an image formed thereon from a correcting device correcting a deformation, and a calculation unit that calculates an internal residual stress of the medium having passed through the correcting device on the basis of a relational expression including an elasticity term and a term related to a plastic deformation and the temporal variation in deformation predicted by the prediction unit.
    Type: Grant
    Filed: August 22, 2011
    Date of Patent: May 19, 2015
    Assignee: FUJI XEROX CO., LTD.
    Inventors: Ryosuke Takahashi, Tomoyuki Ito, Kiyoshi Hosoi, Takashi Ogino
  • Patent number: 9026380
    Abstract: Disclosed is an air gap measuring apparatus, for measuring width of an air gap formed between a rotator and a stator. An insertion section has a first flat plate section and a second flat plate section. Gap adjusting means drives the second flat plate section such that the second flat plate section moves away from the first flat plate section, until the first flat plate section and the second flat plate section abuts on the rotator and the stator. An operating section extends to outside of the insertion section, and operates the gap adjusting means. An elastic body has an end that follows the first flat plate section, and other end that follows the second flat plate section. A strain gage outputs electrical signals corresponding to the strain of the elastic body, the strain being formed due to the movement of the second flat plate section.
    Type: Grant
    Filed: June 20, 2012
    Date of Patent: May 5, 2015
    Assignee: Toshiba Mitsubishi-Electric Industrial Systems Corporation
    Inventors: Kenichi Ito, Yasuaki Hashimoto