By Ultrasonic Patents (Class 702/171)
  • Patent number: 9851230
    Abstract: A fluid flow meter can include a sensor capable of transmitting a transmit signal to propagate, at least partially, through a fluid in a pipe and receiving a respective receive signal. The fluid flow meter can include a memory storing computer code instructions and a plurality of pipe type signatures associated with a plurality of pipe types. Each pipe type signature of a respective pipe type of the plurality of pipe types can include one or more characteristics of receive signals associated with that pipe type. The fluid flow meter can also include a processor communicatively coupled to the sensor and to the memory. When executing the computer code instructions, the processor can determine one or more signal features of the receive signal, and identify a pipe type of the pipe based on the one or more signal features of the receive signal and the plurality of pipe type signatures.
    Type: Grant
    Filed: May 31, 2017
    Date of Patent: December 26, 2017
    Assignee: Reliance Worldwide Corporation
    Inventors: Brian Gestner, Thea Knudsen, Francis M. Mess, Jeffrey L. Leaders
  • Patent number: 9739616
    Abstract: A localization scheme and method using a laser sensor for indoor wheeled mobile robots (IWMR), which need to localize themselves for working autonomously, is provided. In this method, a laser sensor moves inside an onboard guide way and its distance measurements are used to robustly detect and recognize a unique target based on edge detection and pattern recognition techniques. From the distance measurements with respect to the recognized target, a kinematic model is developed to determine the IWMR orientation and location in the global co-ordinates (in 2-D). Such target recognition and localization methods are validated with experimental results.
    Type: Grant
    Filed: June 1, 2012
    Date of Patent: August 22, 2017
    Assignee: Honda Motor Co., Ltd.
    Inventors: Junmin Wang, Madhu Soodhanan Govindarajan, James W. Post, II, Andrew John Fox
  • Patent number: 8884793
    Abstract: A method for reducing ultrasound data from an ultrasound signal includes rectifying the ultrasound signal and generating an envelope curve about maximum values of the rectified ultrasound signal. Each ultrasound pulse is represented as a curve portion with a single maximum value. A first negative envelope curve signal, which is reduced by a first factor f, and a delayed envelope curve signal, which is not modified but is delayed by a time period td, are produced. The first negative envelope curve signal and the delayed envelope curve signal are added to form a first sum signal with a first zero crossing, wherein the first zero crossing represents a first time value. An amplitude is associated with the first time value, the amplitude corresponding to a signal height consistent with a maximum peak height from the envelope curve within a time interval about the first time value.
    Type: Grant
    Filed: February 14, 2012
    Date of Patent: November 11, 2014
    Assignee: Karlsruher Institut Fuer Technologie
    Inventors: Hartmut Gemmeke, Helmut Stripf, Nicole Ruiter
  • Patent number: 8838405
    Abstract: Ultrasonic inspection equipment facilitates alignment of display positions of three-dimensional ultrasonic inspection data and three-dimensional shape data, and quickly discriminates between a defect echo and an inner-wall echo. A computer 102A has a position correction function of correcting a relative display position between three-dimensional shape data and three-dimensional ultrasonic inspection data. A display position of the three-dimensional ultrasonic inspection data or that of the three-dimensional shape data is moved by a norm of a mean vector along the mean vector that is calculated from a plurality of vectors defined by a plurality of points selected in the three-dimensional ultrasonic inspection data and by a plurality of points selected in the three-dimensional shape data. The three-dimensional shape data and the three-dimensional ultrasonic inspection data are displayed in such a manner as to be superimposed on each other on a three-dimensional display unit 103C.
    Type: Grant
    Filed: October 9, 2013
    Date of Patent: September 16, 2014
    Assignee: Mitsubishi Hitachi Power Systems, Ltd.
    Inventors: So Kitazawa, Naoyuki Kono, Atsushi Baba
  • Publication number: 20140208852
    Abstract: Systems, methods and computer storage mediums accurately measure wall thickness in a region of interest included in complex curved structures. Embodiments of the present disclosure relate to generating a wall thickness loss distribution map of a region of interest that provides an accurate representation of wall thickness for the region of interest included in a complex curved structure. The wall thickness loss distribution map is generated from a two-dimensional model of the wall thickness loss distribution of the region of interest. The two-dimensional model is converted from a three-dimensional representation of the wall thickness loss distribution of the region of interest. The three-dimensional representation of the wall thickness is generated by ultrasonic waves generated by a transducer system that propagated through the region of interest.
    Type: Application
    Filed: January 30, 2014
    Publication date: July 31, 2014
    Applicants: CINCINNATI NDE, LTD., UNIVERSITY OF CINCINNATI
    Inventors: Geir Instanes, Peter B. Nagy, Francesco Simonetti, Carson L. Willey
  • Patent number: 8639488
    Abstract: A method of producing a temperature model of a surface of an object using ultrasonic transducers comprises the steps of iteratively adjusting a temperature model by using measured travel times of ultrasonic waves and their predictions model-based. The ultrasonic waves used for producing the temperature model are preferably substantially non-dispersive ultrasonic waves. The method may further involve a height model of the surface, which height model is produced using substantially dispersive ultrasonic waves and is corrected by using the temperature model.
    Type: Grant
    Filed: May 13, 2009
    Date of Patent: January 28, 2014
    Assignee: Nederlandse Organisatie Voor Toegepast-Natuurwetenschappelijk Onderzoek TNO
    Inventors: Arno Willem Frederik Volker, Arjan Mast, Joost Gerardus Petrus Bloom, Pieter Jacobus Gijsbertus Van Beek
  • Patent number: 8600702
    Abstract: The present invention generally relates to improved non-destructive thickness measurement systems and methods. Embodiments of the present invention utilize quarter wave resonant frequency to measure the thickness of high-temperature pipe walls. In one embodiment, an improved non-destructive thickness measurement system is provided that utilizes Gaussian white noise to produce maximum mechanical resonance in the pipe wall and laser vibrometers to detect the pipe wall's maximum displacement.
    Type: Grant
    Filed: December 30, 2008
    Date of Patent: December 3, 2013
    Assignee: United States Pipe and Foundry Company, LLC
    Inventor: Kenneth J. Watts
  • Patent number: 8583393
    Abstract: Ultrasonic inspection equipment facilitates alignment of display positions of three-dimensional ultrasonic inspection data and three-dimensional shape data, and quickly discriminates between a defect echo and an inner-wall echo. A computer 102A has a position correction function of correcting a relative display position between three-dimensional shape data and three-dimensional ultrasonic inspection data. A display position of the three-dimensional ultrasonic inspection data or that of the three-dimensional shape data is moved by a norm of a mean vector along the mean vector that is calculated from a plurality of vectors defined by a plurality of points selected in the three-dimensional ultrasonic inspection data and by a plurality of points selected in the three-dimensional shape data. The three-dimensional shape data and the three-dimensional ultrasonic inspection data are displayed in such a manner as to be superimposed on each other on a three-dimensional display unit 103C.
    Type: Grant
    Filed: May 27, 2009
    Date of Patent: November 12, 2013
    Assignee: Hitachi, Ltd.
    Inventors: So Kitazawa, Naoyuki Kono, Atsushi Baba
  • Patent number: 8521453
    Abstract: A method and apparatus for inspecting a wall of a mechanical structure including obtaining an infinite response from a sample material having a front face, a thickness, and a back wall, by transmitting into a sample material an ultrasonic wave having a frequency and duration and being generated by one or more transducers, wherein the thickness of the sample material is sufficiently great that only a wave corresponding to the front face of the sample is received back; transmitting an ultrasonic wave generated by one or more transducers into the wall of a mechanical structure to be inspected at a time (T), wherein the ultrasonic wave has the same frequency and duration as the ultrasonic wave transmitted into the sample material; receiving a response signal back from the wall to be inspected; and correlating the response signal to the infinite response, thereby creating correlated data.
    Type: Grant
    Filed: March 15, 2010
    Date of Patent: August 27, 2013
    Assignee: Berkeley Springs Instruments LLC
    Inventors: Eugene B. Silverman, Nischom K. Silverman, Paul Baity
  • Patent number: 8521457
    Abstract: A user configured measurement display system and method for a non-destructive testing device and instrument (NDT/NDI) with high input data rate is disclosed. The system and the method provide the means for NDT/NDI instruments display measurement values that satisfies user designated measurement criterion occurring during any measurement time intervals (MTIs). The present disclosure overcomes the shortcomings of conventional ways of picking and displaying measurement values at fixed MTIs, by which the values truly satisfying the measurement criterion that occurs at random MTIs (other than scheduled MTIs) are often skipped.
    Type: Grant
    Filed: October 20, 2008
    Date of Patent: August 27, 2013
    Assignee: Olympus NDT
    Inventors: Jayesh Patel, Michael Drummy
  • Patent number: 8315834
    Abstract: Embodiments of the invention relate to a system and a method for measuring the thickness of a coating applied to a substrate or component. Embodiments of the invention relate to measuring the distance between a surface of a component, both before and after the surface is covered with a coating material, and an optical measuring device such as a laser displacement sensor. In addition, aspects of the invention include the measurement of the temperature of the component surface before and after the application of the coating and after the component has cooled to substantially ambient temperature. In such case, a more accurate coating thickness calculation can be made by accounting for the thermal expansion of the component due to the deposition of a heated coating on the component surface. Accordingly, embodiments of the invention are particularly suited for thermal spray processes.
    Type: Grant
    Filed: December 17, 2003
    Date of Patent: November 20, 2012
    Assignee: Siemens Energy, Inc.
    Inventors: Vladimir Gimelfarb, Kent Hultgren
  • Patent number: 8275574
    Abstract: A system for automatically detecting corona effects in operating dynamic electromechanical equipment may include: at least one sensor connected to operating dynamic electromechanical equipment, a controller connected to the at least one sensor and to the operating dynamic electromechanical equipment; and a corona phenomena detection device. The at least one sensor may be adapted to measure behavior of emitted signals of the operating dynamic electromechanical equipment. The controller may be adapted to adjust emitted signals of the operating dynamic electromechanical equipment to correct for errors detected by the sensor in the emitted signals The corona phenomena detection device may be adapted to automatically detect corona effects of the dynamic electromechanical equipment.
    Type: Grant
    Filed: December 1, 2008
    Date of Patent: September 25, 2012
    Assignee: The Boeing Company
    Inventor: Ali Reza Mansouri
  • Publication number: 20120166135
    Abstract: The invention relates to a method for determining a physical parameter representative of a point P of a plate by means of a device comprising a first receiver for measuring a wave propagating in the plate, and a calculation unit. The method includes the following steps: measuring, by means of the first receiver, a first signal s1(t) representative of a wave propagating in the plate; defining a closed contour C on the plate surrounding said point P, the contour C being the location on the plate on which either a wave is generated by a first emitter, or the first signal s1(t) is measured; and determining the physical parameter at point P on the plate by identifying, thanks to at least said first signal, a shape function fshape(f), in the following equation: formula (I), where Wcontour and Gplate are functions of Green, and the shape function fshape(f) is dependent on the frequency f of the wave and on the physical parameter.
    Type: Application
    Filed: July 29, 2010
    Publication date: June 28, 2012
    Applicants: Mathias Fink
    Inventors: Ros Kiri Ing, Nicolas Etaix, Alexandre LeBlanc, Mathias Fink
  • Patent number: 8132461
    Abstract: An ice thickness measurement system for determining thicknesses of an ice sheet such as an ice rink that is positioned on a solid or granular substrate. The system determines the thickness of the ice sheet using an acoustic technique, is portable, and may include a display graphic or graphical user interface on the portable unit to direct operators of the unit where to conduct an array of measurements on the ice sheet. The system may also be compatible with a computer for downloading of data and uploading of graphical displays.
    Type: Grant
    Filed: March 19, 2008
    Date of Patent: March 13, 2012
    Assignee: Prec“ICE” Technology, Inc.
    Inventors: Mark Clasen, Orrin Milo McGill, Philip Eric Erickson, Ernest L. Tell
  • Patent number: 7996688
    Abstract: Disclosed are systems and methods which power-down (reduce power to or deactivate) circuits in an ultrasound system during periods in which an acoustic signal is not being acquired, although image processing and other system functions are continued normally. Such circuits may be powered-down between each of a series of acoustic signal acquire operations, such as between acoustic signal scan lines and/or between acoustic signal scan frames. The circuitry which is powered-down between scan lines and scan frames may not the same, although some circuitry may be common to both. Embodiments may further operate to adjust the acoustic signal dead time circuitry power-down cycle, such as by adjusting acoustic signal frame rates. Power-down techniques may be utilized in addressing power issues and/or in controlling thermal aspects of the operation of an ultrasound diagnostic system.
    Type: Grant
    Filed: August 24, 2004
    Date of Patent: August 9, 2011
    Assignee: SonoSite, Inc.
    Inventor: Blake W. Little
  • Publication number: 20110106493
    Abstract: An acoustic apparatus adapted to operate in a gas filled space from a first side of an object to be measured for making a non-contact thickness measurement thereof includes an electro acoustic transducer, a transceiver coupled with the electro acoustic transducer and adapted to excite electro acoustic transducer to output an acoustic signal towards the object to be measured and receive an acoustic response signal therefrom, and a signal processor adapted to process the response signal and determine a thickness of the object. The electroacoustic transducer has a transducer-to-gas acoustic interface, and the transceiver is adapted to operate the electroacoustic transducer so as to emit into a gas filled gap an acoustic broad band pulse towards the object and to receive an acoustic resonance response signal in the acoustic response signal at a level that allows acquisition of the resonance response signal above a predetermined signal to noise level.
    Type: Application
    Filed: January 14, 2011
    Publication date: May 5, 2011
    Applicant: DET NORSKE VERITAS AS
    Inventors: AGE A. OLSEN, Jostein Jacobsen, Tore Magne Halås Skar, Petter Norli, Ashild Bergh, Nils-Otto Negård, Steinar Låg
  • Patent number: 7917317
    Abstract: Configuration of an ultrasonic inspection system is facilitated using an ultrasound response predicted by a simulation tool. In one embodiment, estimated material properties of an object to be inspected are input to the simulation tool. Also input to the simulation tool is at least one estimated property of an ultrasonic transducer of the ultrasonic inspection. The simulation tool predicts the response of the object to ultrasound from the ultrasonic transducer. This response is dependent upon the estimated material properties of the object to be inspected and the at least one estimated property of the ultrasonic transducer. The ultrasonic inspection system is then configured dependent upon a feature of the predicted response. The system may be configured, for example, by setting the position of a time gate, selecting an appropriate ultrasonic transducer, selecting the position of the transducer to achieve good focus, or selecting parameters for signal processing.
    Type: Grant
    Filed: July 7, 2006
    Date of Patent: March 29, 2011
    Assignee: Sonix, Inc.
    Inventor: James C. P. McKeon
  • Publication number: 20100169043
    Abstract: The present invention generally relates to improved non-destructive thickness measurement systems and methods. Embodiments of the present invention utilize quarter wave resonant frequency to measure the thickness of high-temperature pipe walls. In one embodiment, an improved non-destructive thickness measurement system is provided that utilizes Gaussian white noise to produce maximum mechanical resonance in the pipe wall and laser vibrometers to detect the pipe wall's maximum displacement.
    Type: Application
    Filed: December 30, 2008
    Publication date: July 1, 2010
    Inventor: Kenneth J. Watts
  • Patent number: 7584062
    Abstract: An ultrasonic stimulus pulse is emitted incident to a laminar structure and recorded as pulse data. Echoes resulting from the stimulus pulse are recorded as echo data. One or more vectors are derived by way of time-shifting the recorded pulse data by respective amounts and a matrix ? is defined including the one or more vectors. An echo vector Y is defined using the recorded echo data. A solution vector X is determined in accordance with: Y=?*X, typically within a predetermined tolerance. B-scan display or other analysis of one or more distinct solution vectors enables user and/or automated identification and measurement of any anomalies within the laminate material.
    Type: Grant
    Filed: June 20, 2008
    Date of Patent: September 1, 2009
    Assignee: The Boeing Company
    Inventors: Hong H. Tat, Richard H. Bossi, Yuan-Jye Wu, John-Paul N. Sabino
  • Publication number: 20090112509
    Abstract: A method includes measuring a radius of curvature at each of the plurality of positions of the outer peripheral surface of the predetermined section of the pipe is measured through the first device. A second device is detachably coupled to the plurality of positions along the outer peripheral surface of the predetermined section of the pipe. A wall thickness at each of the plurality of positions of the outer peripheral surface of the predetermined section of the pipe is measured through the second device. A cross-sectional area of the predetermined section of the pipe is measured based on a measurement data including the radius of curvature and wall thickness at each of the plurality of positions of the outer peripheral surface of the predetermined section of the pipe.
    Type: Application
    Filed: October 25, 2007
    Publication date: April 30, 2009
    Applicant: GENERAL ELECTRIC COMPANY
    Inventors: Thomas James Batzinger, Jeffrey David Tilden, Xiaolei Shirley Ao, Waseem Ibrahim Faidi, Yanyan Wu, Nelson Raymond Corby, JR.
  • Patent number: 7512518
    Abstract: A method of using acoustic signals in the form of waves or pulses to non-destructively measure the thickness of a bonding layer sandwiched between and bonding together overlying and underlying materials different from the bonding layer especially when the thickness of the bonding layer is so small that the features (maxima, minima, time position) of the echo from the interface of the bonding layer and the overlying material is indistinguishable, i.e., not independently observable from the features (maxima, minima, time position) of the echo from the interface of the bonding layer and the underlying material.
    Type: Grant
    Filed: July 19, 2007
    Date of Patent: March 31, 2009
    Assignee: International Business Machines Corporation
    Inventors: Alexandre Blander, Richard Brassard, Carl Savard, Julien Sylvestre
  • Patent number: 7386416
    Abstract: The wall thickness and ovality of a tubular are simultaneously determined. The theoretical radius of a pipe is computed from a measurement of its circumference. An ultrasonic device conventionally used to measure the wall thickness of tubulars is adapted to also measure the maximum and minimum diameters and ovality by equipping or utilizing existing ultrasound inspection device with contact surfaces which contact the tubular at a fixed distance apart and at a known distance from the surface of the ultrasonic transducer. The contact surfaces define a chord of known length on the tubular under test. The mean radius of the tubular may be computed from multiple water path measurements around the circumference relative to a known fixture. The maximum and minimum diameter and ovality are calculated from the measured differences in distance from the surface of the tubular to the ultrasonic transducer and the theoretical circle.
    Type: Grant
    Filed: May 4, 2007
    Date of Patent: June 10, 2008
    Assignee: Cudd Pressure Control, Inc.
    Inventor: David Glasscock
  • Publication number: 20080021673
    Abstract: A method of using acoustic signals in the form of waves or pulses to non-destructively measure the thickness of a bonding layer sandwiched between and bonding together overlying and underlying materials different from the bonding layer especially when the thickness of the bonding layer is so small that the features (maxima, minima, time position) of the echo from the interface of the bonding layer and the overlying material is indistinguishable, i.e., not independently observable from the features (maxima, minima, time position) of the echo from the interface of the bonding layer and the underlying material.
    Type: Application
    Filed: July 19, 2007
    Publication date: January 24, 2008
    Inventors: Alexandre Blander, Richard Brassard, Carl Savard, Julien Sylvestre
  • Patent number: 7272529
    Abstract: A method and apparatus is provided to analyze a dual wall structure having at least one hollow core therein and having the same unknown material sound velocities in walls and in post as well. A transducer is located in at least two different positions with respect to the structure, whereby the transducer propagates an ultrasonic wave toward the dual wall structure. A portion of the ultrasonic wave is reflected back to the transducer. One wave traverses a portion of the dual wall structure that has a core filled with a medium having a known material acoustic property. A second wave traverses a portion of the post that has an unknown material sound velocity. From time of flight measurements of the above mentioned waves, the wall thickness and core shift, if any, can be determined.
    Type: Grant
    Filed: July 8, 2005
    Date of Patent: September 18, 2007
    Assignee: Honeywell International, Inc.
    Inventors: Robert J. Hogan, James A. Hall, Surendra Singh
  • Patent number: 7231314
    Abstract: The wall thickness and ovality of a tubular are simultaneously determined. The theoretical radius of a pipe is computed from a measurement of its circumference. An ultrasonic device conventionally used to measure the wall thickness of tubulars is adapted to also measure the maximum and minimum diameters and ovality by equipping or utilizing existing ultrasound inspection device with contact surfaces which contact the tubular at a fixed distance apart and at a known distance from the surface of the ultrasonic transducer. The contact surfaces define a chord of known length on the tubular under test. The mean radius of the tubular may be computed from multiple water path measurements around the circumference relative to a known fixture. The maximum and minimum diameter and ovality are calculated from the measured differences in distance from the surface of the tubular to the ultrasonic transducer and the theoretical circle.
    Type: Grant
    Filed: March 2, 2006
    Date of Patent: June 12, 2007
    Assignee: Cudd Pressure Control, Inc.
    Inventor: David Glascock
  • Patent number: 6968290
    Abstract: An electrochemical machining tool assembly includes first and second tools that are spaced apart from one another so that a workpiece can be located therebetween. The assembly also includes a first ultrasonic transducer mounted in the first tool and a second ultrasonic transducer mounted in the second tool. The electrochemical machining process is monitored by generating ultrasonic waves with the first and second ultrasonic transducers, and then detecting the arrival times, at the first and second ultrasonic transducers, of certain reflections of the ultrasonic waves. The detected arrival times are then used to calculate parameters such as the gap sizes between the first and second tools and a workpiece situated therebetween and the thickness of the workpiece.
    Type: Grant
    Filed: March 27, 2001
    Date of Patent: November 22, 2005
    Assignee: General Electric Company
    Inventors: Bin Wei, Wei Li, Michael Scott Lamphere
  • Patent number: 6915232
    Abstract: A non-contact method of measuring the thickness of an insulator film on a semiconductor substrate includes: (i) charging the insulator film surface in a non-contact manner; (ii) obtaining a first flat band voltage by conducting, prior to the charging processing step, a C-V measurement on the semiconductor substrate; obtaining a second flat band voltage by conducting, after the charging processing step, a C-V measurement on the semiconductor substrate; and calculating, based on a difference between the first and second flat band voltages, the charge amount given to the insulator film surface by the charging processing step; (iii) then measuring the insulator film surface potential and (iv) calculating the insulator film thickness based on the charge amount measured at the charge amount measuring step and on the surface potential measured at the surface potential measuring step.
    Type: Grant
    Filed: July 21, 2003
    Date of Patent: July 5, 2005
    Assignee: Dainippon Screen Mfg. Co., Ltd.
    Inventors: Toshikazu Kitajima, Motohiro Kono
  • Patent number: 6898536
    Abstract: The start up performance of an ultrasonic system under zero load conditions is improved by setting a phase set point in a frequency control loop such that, at start up under zero load conditions, the phase set point intersects a point on a phase-frequency response curve which has a low positive slope. This intersection point on the phase-frequency response curve changes as the load is increased and the system Q is decreased. The controller “seeks” a target 0° impedance phase angle. The frequency of the ultrasonic generator is set to an off-resonance frequency which is lower than the resonance of any known hand piece/blade combination. In order for the drive voltage to not exceed the physical limit of the system, the drive current is set to a low level. The drive frequency is then smoothly increased in steps until the target 0° impedance phase delta is located.
    Type: Grant
    Filed: September 4, 2002
    Date of Patent: May 24, 2005
    Assignee: Etchicon Endo-Surgery, Inc.
    Inventors: Eitan T. Wiener, Joseph A. Brotz, John E. Hein
  • Publication number: 20040111235
    Abstract: A method for measuring wall thickness of an annular material during a manufacturing process includes the steps of hot die forming an annular material, employing an ultrasonic gauge about the formed annular material while in a hot state and which is operably equipped to produce an output signal indicative of concentricity thereof, and employing a computer based device to calibrate the ultrasonic gauge using a calculated finished cold formed wall thickness for the annular material. The method further employs a laser gauge to provide an output to the computer indicative of the outer diameter size of the formed annular material when cooled, wherein the computer uses the output in determining the calibration. A system is also provided.
    Type: Application
    Filed: December 9, 2002
    Publication date: June 10, 2004
    Inventor: Donald H. Haskins
  • Patent number: 6721692
    Abstract: An LED-based spectrophotometer uses a reconstruction algorithm, based on spectral information of an illumination source and a reference spectrophotometer, to convert integrated multiple illuminant measurements from a non-fully illuminant populated color sensor into a fully populated spectral curve using a reference database. A dynamic, Least Squares-based spectral reconstruction algorithm, used to reconstruct spectra, gives greater importance to the data from the reference database in the neighborhood of the color sample under measurement. This is done using linear operators.
    Type: Grant
    Filed: August 30, 2001
    Date of Patent: April 13, 2004
    Assignee: Xerox Corporation
    Inventors: Lingappa K. Mestha, Sohail A. Dianat
  • Patent number: 6625568
    Abstract: Sound detection techniques and sound discrimination techniques are used to analyze the real time sounds generated during the operation of cleaning heads operating within a vessel to determine if the cleaning heads are operating properly. During a typical cleaning operation pressurized cleaning solution is dispensed through a rotating nozzle assembly inside the vessel. As the nozzles rotate the spray moves about the interior of the vessel creating a unique sound pattern. By placing one or more pickups on the exterior of the vessel the sound is captured and fed to an analyzing device for analysis. Key properties such as, but not limited to, sound pressure levels, amplitude variations, spectral content, and rotational information are extracted and analyzed against the reference parameters.
    Type: Grant
    Filed: October 23, 2001
    Date of Patent: September 23, 2003
    Inventor: James Tyson
  • Patent number: 6561032
    Abstract: The average wall thickness of a pipe carrying a fluid is determined by sensing disturbances in the pipe at two spaced locations, determining the propagation velocity of coupled propagation mode signals at low frequencies resulting from the disturbances, and calculating the average pipe wall thickness between the two locations from the propagation velocity and known constants for the pipe and fluid.
    Type: Grant
    Filed: May 15, 2000
    Date of Patent: May 13, 2003
    Assignee: National Research Council of Canada
    Inventor: Osama Hunaidi
  • Patent number: 6502059
    Abstract: A method is provided of determining waveform stability of a pulse echo layer transducer (PELT) used for measuring paint film thickness of painted bodies. The method includes the steps of reading a signal with the PELT transducer with respect to a desired location of the vehicle. The method also includes the steps of determining whether a maximum absolute value of the read signal is greater than a noise threshold (&phgr;) and computing a measure (&rgr;) based on an option (k). The method includes the steps of determining whether the computed measure (&rgr;) is above or below a predetermined threshold (T) based on the option (k), and concluding a stable/unstable signal from the PELT transducer.
    Type: Grant
    Filed: April 28, 2000
    Date of Patent: December 31, 2002
    Assignee: Ford Global Technologies, Inc.
    Inventors: Dimitar P. Filev, Frank Migda, Sunil Bharitkar
  • Publication number: 20020143492
    Abstract: An electrochemical machining tool assembly includes first and second tools that are spaced apart from one another so that a workpiece can be located therebetween. The assembly also includes a first ultrasonic transducer mounted in the first tool and a second ultrasonic transducer mounted in the second tool. The electrochemical machining process is monitored by generating ultrasonic waves with the first and second ultrasonic transducers, and then detecting the arrival times, at the first and second ultrasonic transducers, of certain reflections of the ultrasonic waves. The detected arrival times are then used to calculate parameters such as the gap sizes between the first and second tools and a workpiece situated therebetween and the thickness of the workpiece.
    Type: Application
    Filed: March 27, 2001
    Publication date: October 3, 2002
    Applicant: General Electric
    Inventors: Bin Wei, Wei Li, Michael Scott Lamphere
  • Patent number: 6298152
    Abstract: An image recognition system using a light-section method which has versality and does not shorten the service life of light projector means. Projection of light from a light source onto a workpiece is continued between the time when a measuring command is issued and the time just after light has been converged by the automatic aperture control mechanism of a television camera. An image processing unit processes an image picked up by the television camera just after the convergence of light by the automatic aperture control mechanism so as to obtain three dimensional configuration data on the workpiece.
    Type: Grant
    Filed: July 29, 1998
    Date of Patent: October 2, 2001
    Assignee: Komatsu Ltd.
    Inventors: Toshiyuki Ooenoki, Toshiro Ootani
  • Patent number: 6003377
    Abstract: A method for automatic state control, inspection, cleaning and/or surface treatment of structures, especially measuring the thickness of plate constructions and pipes by means of ultrasound signals from a self-propelled, remotely controllable unit. The self-propelled unit is continuously moved in the measurement area, and a transmitter transmits an ultrasound signal in a direction substantially perpendicular to the surface of the construction. A reflected signal is received by a receiver which determines thickness and material quality of the construction at the measurement spot, on the basis of the received reflected signal, and parameters such as transit time for the reflected signal. The self-propelled unit performs self-positioning by means of previously known spots on the construction.
    Type: Grant
    Filed: August 26, 1997
    Date of Patent: December 21, 1999
    Assignee: Red Band AS
    Inventors: Tor Inge Waag, Anette Olsen
  • Patent number: 5878380
    Abstract: A method has been invented of providing feedback regarding tolerance for a dimension of a concrete block in relation to a datum in a computer-based system with a CPU, an input connected to the CPU, a memory associated with the CPU, a data transmitter connected to the CPU, a controller card connected to the data transmitter, an ultrasound transducer connected to the controller card, a timing device connected to the controller card, a memory means associated with the controller card, a feedback device connected to the controller card, and an environmental adaptator. Also, the invention can be described as an environmentally adaptable computer-based apparatus utilizing ultrasound for providing feedback regarding the dimensional quality of concrete blocks positioned on pallets traveling on a conveyor. The apparatus has a first memory for controlling a CPU, an input, an ultrasound transducer, a timing device, a second memory, a controller card, a data transmitter, a CPU, and a feedback device.
    Type: Grant
    Filed: November 8, 1996
    Date of Patent: March 2, 1999
    Inventor: Paul R Hollandsworth
  • Patent number: 5815404
    Abstract: A method and apparatus for creating and utilizing a database of defective antifuses on a programmable logic device and comparing the list to a catalog of required connections in a design, wherein the process of comparing the two lists will determine whether the device, although flawed, is nonetheless compatible with the design to be implemented, thereby increasing device yield.
    Type: Grant
    Filed: October 16, 1995
    Date of Patent: September 29, 1998
    Assignee: Xilinx, Inc.
    Inventors: F. Erich Goetting, David P. Schultz, David B. Squires