Spectrum Analysis Patents (Class 73/659)
  • Patent number: 10593199
    Abstract: Methods, computer-readable media, systems and apparatuses for rating a road segment based on data received from one or more sensors distributed along the road segment. In some arrangements, a number of sensors along a road segment may be determined based on characteristics or features of the road segment. In at least some arrangements, the data received and/or processed from road segment sensors may be controlled based on current road segment conditions. For instance, in fair weather data from fewer than all sensors along a road segment may be received and/or processed because the likelihood of a dangerous condition is reduced. However, when current conditions indicate the potential for hazardous conditions (e.g., temperature near or below freezing, presence of moisture, untreated road segment, etc.) data from all sensors may be received and/or processed to ensure the most accurate information for an entire length of the road segment is obtained.
    Type: Grant
    Filed: July 11, 2019
    Date of Patent: March 17, 2020
    Assignee: Allstate Insurance Company
    Inventor: Mark V. Slusar
  • Patent number: 10499477
    Abstract: The invention provides a light management information system for an outdoor lighting network system, having a plurality of outdoor light units each including at least one sensor type, where each of the light units communicates with at least one other light unit, at least one user input/output device in communication with at one or more of said outdoor light units, a central management system in communication with light units, said central management system sends control commands and/or information to one or more of said outdoor light units, in response to received outdoor light unit status/sensor information from one or more of said outdoor light units or received user information requests from said user input/output device, a resource server in communication with said central management system, wherein the central management system uses the light unit status/sensor information and resources from the resource server to provide information to the user input/output device and/or reconfigure one or more of the l
    Type: Grant
    Filed: March 10, 2014
    Date of Patent: December 3, 2019
    Assignee: SIGNIFY HOLDING B.V.
    Inventors: Hongxin Chen, Dave Alberto Tavares Cavalcanti, Marcin Gramza, Liang Jia, Qing Li, Daniel J. Piotrowski, Marek Zbigniew Szczerba, Marcin Krzysztof Szczodrak, Qin Zhao, Hongqiang Zhai, Michael Alex Van Hartskamp, Martin Elixmann, Zhong Huang, Fulong Ma, Xianneng Peng, Jianfeng Wang, Yi Qiang Yu, Kiran Srinivas Challapali
  • Patent number: 10395526
    Abstract: Methods, computer-readable media, systems and apparatuses for rating a road segment based on data received from one or more sensors distributed along the road segment. In some arrangements, a number of sensors along a road segment may be determined based on characteristics or features of the road segment. In at least some arrangements, the data received and/or processed from road segment sensors may be controlled based on current road segment conditions. For instance, in fair weather data from fewer than all sensors along a road segment may be received and/or processed because the likelihood of a dangerous condition is reduced. However, when current conditions indicate the potential for hazardous conditions (e.g., temperature near or below freezing, presence of moisture, untreated road segment, etc.) data from all sensors may be received and/or processed to ensure the most accurate information for an entire length of the road segment is obtained.
    Type: Grant
    Filed: November 8, 2016
    Date of Patent: August 27, 2019
    Assignee: Allstate Insurance Company
    Inventor: Mark Slusar
  • Patent number: 10222298
    Abstract: The invention relates to a system (100) for assisting with the diagnosis of the operating condition of at least one industrial rotary machine (M1, M2, M3), consisting of an industrial electric fan unit, or an industrial motorized pump unit including a pumping wheel, said diagnosis assistance system (100) including a base support (50) and a means (10) for receiving signals (S1, S2, S3) secured to the base mounting (50), the means (10) for receiving signals (S1, S2, S3) being designed such as to receive signals (S1, S2, S3) representing raw values (6) of at least one operating parameter of the rotary machine (M1, M2, M3), characterized in that the system (100) also includes a means (20) for interpreting the operating condition designed such as to automatically interpret the raw values (6) received and to generate a diagnosis (De) of the operating condition of the rotary machine (M1, M2, M3) in accordance with said raw values (6). The invention can be used in the field of rotary-machine maintenance.
    Type: Grant
    Filed: December 30, 2014
    Date of Patent: March 5, 2019
    Assignee: Howden Solyvent-Ventec
    Inventors: Michel Sivo, Alain Bernard Dominique Louisot, Didier Francois Hugues Amor
  • Patent number: 9841352
    Abstract: A method for monitoring a gear and bearing system having at least two inter-meshing gears and at least one bearing includes detecting gear and bearing vibrations with at least one vibration sensor operable to generate a signal representative of the detected gear vibrations. A carrier frequency is identified from the generated signal. A band pass filter is applied to the signal at the carrier frequency to create a filtered signal. An envelope is extracted from the filtered signal to create an extracted signal. A time-frequency analysis is then applied to the extracted signal which allows for identification of degradation of the gears.
    Type: Grant
    Filed: June 11, 2015
    Date of Patent: December 12, 2017
    Assignee: UNITED TECHNOLOGIES CORPORATION
    Inventors: Yan Chen, Zaffir A. Chaudhry
  • Patent number: 9482647
    Abstract: Embodiments are directed to obtaining an impact energy signal associated with each of a plurality of teeth of a gear over a revolution of a shaft associated with the gear, generating, by a computing device comprising a processor, a profile of the impact energy signal, and declaring a fault associated with an identified tooth included in the plurality of teeth based on an analysis of the profile.
    Type: Grant
    Filed: September 24, 2013
    Date of Patent: November 1, 2016
    Assignee: SIKORSKY AIRCRAFT CORPORATION
    Inventors: Joshua D. Isom, Zaffir A. Chaudhry, Guicai Zhang, Fanping Sun, Madhusudana Shashanka, Yan Chen
  • Patent number: 9434115
    Abstract: A method for controlling a manufacturing process of components of a tire for vehicle wheels, wherein at least one elongated element fed by a dispensing member is distributed onto a forming support by means of at least one pressing member acting on the at least one elongated element along a pressing direction. The method includes the steps of substantially continuously detecting the value of a characteristic quantity indicative of the displacement of the at least one pressing member along the pressing direction, comparing the detected value of the characteristic quantity with a threshold value and generating a warning signal when the detected value of the characteristic quantity exceeds the threshold value. Such a control method allows the presence of possible deposition anomalies to be identified right from the deposition step of the elongated elements on the forming support so as to ensure ever higher quality levels in tires manufactured through continuous processes.
    Type: Grant
    Filed: December 1, 2004
    Date of Patent: September 6, 2016
    Assignee: Pirelli Tyre S.p.A.
    Inventors: Marco Cantu′, Enrico Sabbatani
  • Patent number: 9329836
    Abstract: Generating a pool of random numbers for use by computer applications. Vibration sensors are placed throughout a machine and collect entropy data from the measurements of the vibration sensors. The data is then filtered and sent via secure connection to a second machine to be added to the second machine's entropy pool. Applications needing a random number may acquire a number from the pool. A method, computer program product and system to generate the pool are provided.
    Type: Grant
    Filed: April 17, 2014
    Date of Patent: May 3, 2016
    Assignee: INTERNATIONAL BUSINESS MACHINES CORPORATION
    Inventors: Volker Boenisch, Reinhard Buendgen, Franziska Geisert, Jakob Lang, Mareike Lattermann, Budy D Notohardjono, Angel Nunez-Mencias
  • Patent number: 9038475
    Abstract: One embodiment of the invention provides a system for identifying an anomalous movement of a reciprocating element in a reciprocating device, the system comprising: at least one sensing device for sensing a vibration signal of the reciprocating element; a processing apparatus for separating the vibration signal into a first component having a first frequency range and a second component having a second frequency range different than the first frequency range; and a device for at least one of analyzing or displaying at least one of the first or the second components of the vibration signal, wherein the vibration signal includes positional data of the reciprocating element along at least one axis of the reciprocating element.
    Type: Grant
    Filed: August 13, 2012
    Date of Patent: May 26, 2015
    Assignee: General Electric Company
    Inventors: Brian F. Howard, Roger A. Hala, L John Kitchens, Jr., Stephen Edward Plaisance
  • Patent number: 9032803
    Abstract: A method including acquiring a current vibration signal of an engine component mechanical vibration across a set of a measuring period P of changes in shaft speed N; capturing the signal during the period P; synchronizing the signal relative to the changes in the speed N; transforming the signal into a frequency signal for obtaining frequency spectrum lines arranged according to the speed N; calculating the mean amplitude of the spectrum lines to obtain a current vibration signature for the engine; calculating a deviation ratio between the signature and a healthy reference vibration signature; and comparing the deviation ratio to the defect indicators in a predefined database, listing the theoretical damage to the roller engine bearings so as to determine potential damage to the roller bearing.
    Type: Grant
    Filed: November 3, 2010
    Date of Patent: May 19, 2015
    Assignee: SNECMA
    Inventor: Julien Griffaton
  • Patent number: 8887570
    Abstract: A method provides detecting a contact state between at least one driver/operator of a vehicle and a control input device designed to control the vehicle, where a frequency spectrum is calculated from sensors detected movement signals based on which the contact state between the control input device and the driver/operator is determined.
    Type: Grant
    Filed: May 2, 2011
    Date of Patent: November 18, 2014
    Assignee: Deutsches Zentrum fuer Luft—und Raumfahrt E.V.
    Inventors: Max Abildgaard, Robin Lantzsch, Mario Muellhaeuser
  • Patent number: 8874258
    Abstract: A method of transporting a substrate with a substrate support, the method includes defining a frictional breakaway force between the substrate and the substrate support in a horizontal plane, moving the substrate in the horizontal plane along a horizontal trajectory, moving the substrate in a vertical direction along a vertical trajectory simultaneously while moving the substrate in the horizontal plane, and wherein the horizontal trajectory is determined based on the acceleration profile of the vertical trajectory and wherein the horizontal trajectory prevents the moving of the substrate from overcoming the coefficient of friction in the horizontal plane.
    Type: Grant
    Filed: September 13, 2012
    Date of Patent: October 28, 2014
    Assignee: Persimmon Technologies Corporation
    Inventor: Martin Hosek
  • Publication number: 20140277827
    Abstract: A vehicle measurement apparatus and a method for measuring vehicle data are provided. For example, the vehicle measurement apparatus includes a system-on-a-chip (SoC) device configured to integrate a programmable module with a microcontroller unit to receive vehicle data, process the vehicle data, and communicate the processed vehicle data to a remote computer.
    Type: Application
    Filed: March 13, 2013
    Publication date: September 18, 2014
    Applicant: SERVICE SOLUTIONS U.S. LLC
    Inventors: Manokar CHINNADURAI, Marco LE BRUN
  • Patent number: 8826741
    Abstract: A monitoring system for an assembly that is subject to vibrations. The system has a first unit for monitoring vibrations. The monitoring system permits the connection of a sensor unit that detects one or more measured values. A measured value converter with inputs for one or more measured values is provided to convert the values into a temporally variable analogue signal, in which at least one frequency portion represents one measured value. Other detected measured values and status parameters can thus be processed in one vibration monitoring unit.
    Type: Grant
    Filed: June 17, 2009
    Date of Patent: September 9, 2014
    Assignee: Schaeffler Technologies GmbH & Co. KG
    Inventors: Andreas Kuehl, Goetz Langer
  • Patent number: 8810173
    Abstract: Continuous monitoring and fault diagnosis of rotating machinery during variable speed operation is performed using only a position feedback signal. The position sensor generates a periodic waveform having multiple pulses per revolution of the machine. A circuit is included to detect, for example, a zero crossing or edge of the periodic waveform. At each detected zero crossing or edge, the time and position of the event is stored in memory. Other data, such as the current in the motor, may also be sampled and stored in memory. Because the sampled data is triggered by repeated feature of the position feedback signal, the sampled data is in a stationary reference frame in the position domain. Frequency analysis is performed on the sampled data, and the frequency components present in either the sampled signal are analyzed to identify the presence of a fault in the rotating machinery.
    Type: Grant
    Filed: November 18, 2010
    Date of Patent: August 19, 2014
    Assignee: Rockwell Automation Technologies, Inc.
    Inventors: Linglai Li, Wei Qian, Thomas D. Lundell
  • Patent number: 8763464
    Abstract: Method and apparatus for determining an operating point of a work machine and/or asynchronous motor driving the same, the operating point being characterized by the power consumed by and/or output rate of the machine, in which one or more operating point-dependent measurement variables of the machine are detected by sensors, and the measured values are evaluated and/or stored during operation of the machine. The operating point is determined without using electric measurement variables of the motor by determining a frequency linearly proportional to the fundamental tone of the machine through signal analysis, especially frequency analysis of a measured mechanical variable selected from pressure, differential pressure, power, vibration, and solid-borne or air-borne sound.
    Type: Grant
    Filed: November 18, 2011
    Date of Patent: July 1, 2014
    Assignee: KSB Aktiengesellschaft
    Inventors: Christoph Emde, Stefan Laue, Marjan Silovic
  • Patent number: 8720272
    Abstract: The invention relates to a method and to a device for sound emission analysis, wherein vibrations occurring during the use of a component, during the testing of a component or during the processing of a work piece by means of chipping, welding, forming, joining and/or separating or the like are registered and evaluated, wherein a vibration spectrum is recorded at different times or continuously and subjected to a multi-dimensional evaluation.
    Type: Grant
    Filed: November 2, 2009
    Date of Patent: May 13, 2014
    Inventor: Ulrich Seuthe
  • Patent number: 8712704
    Abstract: A defect detection system and method enable a fastened crystalline silicon product to generate micro-vibration by a micro-vibration excitation device, so as to enable the crystalline silicon product to generate an excitation signal, then to acquire the excitation signal by a acquisition device, so as to analyze the excitation signal acquired by the acquisition device in the time and frequency domain by an analysis detection device with a specific analysis, and to obtain an analysis result, at last, determine a defect state of the crystalline silicon product according to the analysis result.
    Type: Grant
    Filed: September 10, 2010
    Date of Patent: April 29, 2014
    Assignee: Industrial Technology Research Institute
    Inventors: Jui-Yiao Su, Yu-Liang Chung, Chun-Chieh Wang, Chien-Feng Wu, Yan-Chen Liu
  • Patent number: 8677823
    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: Grant
    Filed: January 14, 2011
    Date of Patent: March 25, 2014
    Assignee: Halfwave AS
    Inventors: Age A. Olsen, Jostein Jacobsen, Tore Magne Halas Skar, Petter Norli, Ashild Bergh, Nils-Otto Negard, Steinar Lag
  • Patent number: 8671758
    Abstract: A system and method for measuring a frequency of a wire in a vibrating wire gauge. The system may include a signal generator for generating a signal at a frequency that matches a frequency of the wire vibration and an excitation unit for exciting the wire to increase an amplitude of the wire vibration. The excitation unit may excite the wire using the signal. The system may further include a signal gate for controlling when the signal is sent to the excitation unit.
    Type: Grant
    Filed: November 17, 2011
    Date of Patent: March 18, 2014
    Assignee: Campbell Scientific, Inc.
    Inventors: Larry Eugene Jacobsen, Scott Steven Cornelsen
  • Patent number: 8544331
    Abstract: A parameter-free method to analyze sensor signals incorporates two or more of frequency demodulation, amplitude demodulation and phase demodulation of the raw signal data. The resulting signal is transformed to a frequency domain, and target fault characteristics from the demodulated signal are identified. The method is used to detect faults in bearings, gears and other mechanical components.
    Type: Grant
    Filed: December 4, 2009
    Date of Patent: October 1, 2013
    Assignee: University of Ottawa
    Inventors: Ming Liang, Iman Soltani Bozchalooi
  • Patent number: 8534128
    Abstract: The present invention provides a high accuracy, inexpensive diagnosis method and system diagnosing an abnormality of a 10 rpm or less very low speed roller bearing using an acoustic signal, that is, detects an acoustic signal emitted from a roller bearing of a 10 rpm or less ultralow speed rotating machine using a sensor having a sound pickup performance of 10 kHz or less, uses frequency analysis to find the spectrum distribution, processes this to obtain the frequency analysis waveform, compares the spectral average value or effective value of a frequency of the natural frequency of the bearing or more of this with a reference value, and judges that the bearing is abnormal when this spectral average value or effective value exceeds the reference value.
    Type: Grant
    Filed: March 17, 2008
    Date of Patent: September 17, 2013
    Assignee: Nippon Steel & Sumitomo Metal Corporation
    Inventor: Tsunemi Murayama
  • Patent number: 8515685
    Abstract: A mass spectrometer and a method of spectrometry are disclosed wherein liquid chromatography mass spectral data are probabilistically clustered on the basis of mass to charge ratio and retention time.
    Type: Grant
    Filed: May 3, 2005
    Date of Patent: August 20, 2013
    Assignee: Micromass UK Limited
    Inventors: Richard Denny, Keith Richardson
  • Publication number: 20120304775
    Abstract: One embodiment of the invention provides a system for identifying an anomalous movement of a reciprocating element in a reciprocating device, the system comprising: at least one sensing device for sensing a vibration signal of the reciprocating element; a processing apparatus for separating the vibration signal into a first component having a first frequency range and a second component having a second frequency range different than the first frequency range; and a device for at least one of analyzing or displaying at least one of the first or the second components of the vibration signal, wherein the vibration signal includes positional data of the reciprocating element along at least one axis of the reciprocating element.
    Type: Application
    Filed: August 13, 2012
    Publication date: December 6, 2012
    Applicant: GENERAL ELECTRIC COMPANY
    Inventors: Brian F. Howard, Roger A. Hala, L John Kitchens, JR., Stephen Edward Plaisance
  • Patent number: 8322223
    Abstract: A system for determining a shaft misalignment in a turbomachinary train having a plurality of components with serially coupled rotating shafts. A disclosed system includes a sensor affixed to a component of the turbomachinary train proximate a rotating shaft, wherein the sensor collects vibration data along an axial direction of the rotating shaft. Also provided is a frequency analyzer for generating frequency domain data from the vibration data and an analysis system for analyzing a frequency component of the frequency domain data at one times a rotational frequency of the rotating shaft to identify a misalignment between the rotating shaft and an adjacently coupled rotating shaft.
    Type: Grant
    Filed: April 23, 2010
    Date of Patent: December 4, 2012
    Assignee: General Electric Company
    Inventor: Malath Ibrahim Arar
  • Patent number: 8297123
    Abstract: Embodiments of the invention relate generally to the detection of anomalous or aberrant movement of a reciprocating element in a reciprocating device and, more particularly, to the analysis of one or more components of a vibration signal produced by such anomalous or aberrant movement of the reciprocating element. One embodiment of the invention provides a system for identifying an anomalous movement of a reciprocating element in a reciprocating device, the system comprising: at least one sensing device for sensing a vibration signal of the reciprocating element; a processing apparatus for separating the vibration signal into a first component having a first frequency range and a second component having a second frequency range different than the first frequency range; and an analysis device for analyzing, displaying, or both, at least one of the first and the second components of the vibration signal.
    Type: Grant
    Filed: July 30, 2009
    Date of Patent: October 30, 2012
    Assignee: General Electric Company
    Inventors: Brian F. Howard, Roger A. Hala, L John Kitchens, Jr., Stephen Edward Plaisance
  • Patent number: 8234925
    Abstract: This present invention is a device having a mechanical bearing formed by two coaxial rings, one fixed relative to the machine and the other rotating, between which at least one rolling element is moveably positioned, at least one non-conducting positioning arrangements secured to the fixed bearing ring, the positioning arrangements including at least one placement holder for at least one conducting element forming a first plate of a capacitor, at a distance from a conducting part of the rotating ring forming the second plate of the capacitor, and with the positioning arrangements attached to at least one partitioning arrangements, the partitioning arrangements being used to create a space between the two plates, thus forming a dielectric insulating medium, and to act as a sealed enclosure for this insulating medium by being in contact with a part of the surface of the rotating ring.
    Type: Grant
    Filed: May 7, 2009
    Date of Patent: August 7, 2012
    Assignee: Universite de Reims Champagne-Ardenne
    Inventors: Patrick Marconnet, Bernard Pottier, Lanto Rasolofondraibe
  • Patent number: 8146434
    Abstract: An apparatus for measuring the vibration characteristics of a head gimbal assembly can grasp resonant characteristics at high frequencies and efficiently measure the vibration characteristics of the head gimbal assembly, the apparatus has a shaker head to which the head gimbal assembly is attached, the shaker head has a main body made of ceramics and a fixture made of metal, the fixture is solidly fixed to the main body and is provided with positioning pins and an internal thread, the head gimbal assembly is supported with a mount block, and the mount block has positioning holes to be fitted to the positioning pins of the fixture and a joined part to be removably fastened to the internal thread of the fixture.
    Type: Grant
    Filed: September 22, 2008
    Date of Patent: April 3, 2012
    Assignee: NHK Spring Co., Ltd.
    Inventors: Masao Hanya, Hajime Tada
  • Patent number: 8146433
    Abstract: A failure detect device detects the presence of a failure in a peripheral member of a rotary shaft by analyzing a vibration generated in a device provided with the rotary shaft when the rotary shaft is rotated. A vibration detection unit detects the vibration of the device, and a rotation speed detection unit detects a rotation speed of the rotary shaft. An analysis unit calculates a frequency spectrum of the vibration of the device and determines an actually measured vibration level at each vibration order by dividing a frequency component of the calculated frequency spectrum by the rotation speed of the rotary shaft. A detection unit detects the presence of a failure in the peripheral member on the basis of the actually measured vibration level at each vibration order.
    Type: Grant
    Filed: August 27, 2009
    Date of Patent: April 3, 2012
    Assignee: Jatco Ltd
    Inventors: Mitsuhiro Kishino, Hisashi Kudou, Masayuki Ashizawa, Hiromu Soya
  • Patent number: 8136405
    Abstract: The invention relates to a method for monitoring the dynamic behavior, in particular of the oscillating behavior of a rotating shaft, the oscillation being detected by at least two sensors at defined different spatial position, the oscillating behavior in at least one preferred direction being determined from the oscillation. The invention also relates to a device for monitoring oscillating behavior in a rotary machine with rotable parts, having at least two sensors, a shaft and a computing unit, characterized in that the at least two sensors are positioned in a defined spatial position outside the shaft, detect measurement variables which characterize the oscillations and are connected to a computing unit for the transfer of data. The invention also relates to a gas turbine and a steam turbine that use a method and a device as per the invention.
    Type: Grant
    Filed: August 2, 2006
    Date of Patent: March 20, 2012
    Assignee: Siemens Aktiengesellschaft
    Inventors: Joachim Boetius, Thomas Borger, Hans-Günther Sieberling, Raimund Trockel
  • Patent number: 8061205
    Abstract: An acoustic method and apparatus detects or characterizes a medium in a structure which may be a container, such as a pipeline for transportation of oil, gas, or hydrocarbon condensate. A pulse of broadband acoustic energy is emitted towards the structure by a first transducer. A return signal is generating by a second transducer from acoustic energy returned from the structure in response to the emission of acoustic energy. A return signal spectrum representing acoustic spectral components of the acoustic energy returned from the structure is derived from the return signal, and the medium is detected or characterized by applying a return signal processing medium detection or characterization algorithm to the return signal spectrum.
    Type: Grant
    Filed: April 25, 2007
    Date of Patent: November 22, 2011
    Assignee: Det Norske Veritas AS
    Inventors: Jostein Jacobsen, Åshild Bergh, Ståle Vilming
  • Patent number: 8028583
    Abstract: A method for detecting squeaking noises within a sound signal generated during operation of a motor vehicle or during operation of a component thereof is described; in this method the sound signal is detected; an amplitude spectrum of the sound signal representing the amplitude distribution in a frequency range is generated at a minimum of two points in time and the existence of a squeaking noise is detected by analysis of the at least two amplitude spectra.
    Type: Grant
    Filed: July 7, 2006
    Date of Patent: October 4, 2011
    Assignee: Robert Bosch GmbH
    Inventors: Fawzi Attia, Michael Fischer, Winfried Keiper, Thomas Zoeller, Uwe Bretz, Mats Karlsson, Uwe Martin, Michael Raquet
  • Patent number: 8014903
    Abstract: The vibration suppressing device includes vibration sensors, a FFT calculating unit, a store device, a calculating unit, and a NC device. The vibration sensors detect a time-domain vibrational acceleration of a rotary shaft during rotating. The FFT calculating unit calculates a frequency of chatter vibration and a frequency-domain vibrational acceleration in the frequency of chatter vibration on the basis of the detected time-domain vibrational acceleration. The store device stores the frequency-domain vibrational acceleration, the frequency of chatter vibration and the like as machining information.
    Type: Grant
    Filed: October 21, 2008
    Date of Patent: September 6, 2011
    Assignee: Okuma Corporation
    Inventor: Hiroshi Inagaki
  • Patent number: 8005574
    Abstract: A stable rotation speed is acquired by finely changing a rotation speed of a rotary shaft 3 based on an expected stable rotation speed, and calculating an amount of change of a k? number, and the like. Therefore, a more accurate rotation speed can be acquired, and “chatter vibration” generated during machining can be suppressed more effectively than a conventional method. As a result, a quality of a workpiece surface can be improved, and a tool wear and the like can be suppressed.
    Type: Grant
    Filed: June 29, 2009
    Date of Patent: August 23, 2011
    Assignee: Okuma Corporation
    Inventor: Hiroshi Inagaki
  • Patent number: 7997140
    Abstract: There is provided a method for troubleshooting noise/vibration issues of rotating components, the method comprising: receiving an audio signal of the rotating components in operation; generating a frequency spectrum corresponding to the audio signal; selecting a frequency ?m in the frequency spectrum corresponding to a maximum amplitude; and comparing the frequency ?m to a set of predetermined rotational speeds of the rotating components to find a match; thereby identifying a potentially defective component.
    Type: Grant
    Filed: October 28, 2008
    Date of Patent: August 16, 2011
    Assignee: Pratt & Whitney Canada Corp.
    Inventor: Christian Guy Périé
  • Patent number: 7975548
    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: Grant
    Filed: September 12, 2008
    Date of Patent: July 12, 2011
    Assignee: Det Norske Veritas AS
    Inventors: Åge A. Olsen, Jostein Jacobsen, Tore Magne Halås Skar, Petter Norli, Ashild Bergh, Nils-Otto Negård, Steinar Låg
  • Patent number: 7933691
    Abstract: A system for monitoring the free play in aircraft control surfaces includes one or more accelerometers secured in or on the aircraft control surfaces and a computer system connected to the one or more accelerometers and to one or more control surface actuators to selectively activated to selectively activate a control surface and send a reading from the control surface to the computer system. The computer system includes means to plot the readings from the one or more accelerometers on the control surfaces to plot a curve of the free play in the selected control surface. The method of the invention utilizes the one or more accelerometers placed in or on the aircraft control surfaces and connects them to the aircraft's flight control computer or a similar computer to receive signals originated by vibrating the control surfaces and plotting curves of the free play measured in the control surfaces.
    Type: Grant
    Filed: January 24, 2006
    Date of Patent: April 26, 2011
    Assignee: The Boeing Company
    Inventors: Dale M. Pitt, Jason C. Kiiskila
  • Patent number: 7866213
    Abstract: A method for identifying an unfolded non-synchronous blade vibration frequency in blades on a rotating rotor using a plurality of probes spaced from each other about the rotor. A set of data is acquired from the probes during a predetermined number of rotor revolutions and is processed using a Fourier analysis to generate an output representative of frequencies and phase shift angles corresponding to blade vibrations. The phase shift angles are used to identify a subharmonic for a blade vibration frequency to provide an output identifying the vibration frequency. A space dispersion and time dispersion of probes is described to increase the accuracy of the subharmonic determination using the phase shift angles.
    Type: Grant
    Filed: June 18, 2008
    Date of Patent: January 11, 2011
    Assignee: Siemens Energy, Inc.
    Inventor: Michael Twerdochlib
  • Patent number: 7860663
    Abstract: A abnormality diagnosing apparatus used in a machine equipment including a rotating or sliding part relative to a stationary member includes a detecting portion 31 fixed to the rotating or sliding part or the stationary member and including a vibration sensor 32 and a temperature sensor 33, and a signal processing portion 81 for determining a state of the part from a detecting signal outputted by the detecting portion 31. The signal processing portion 81 determines presence or absence of a abnormality, or presence or absence of the abnormality and a degree of a damage of the part based on a combination of a measured result by the vibration sensor 32 and a measured result by the temperature sensor 33.
    Type: Grant
    Filed: September 13, 2005
    Date of Patent: December 28, 2010
    Assignee: NSK Ltd.
    Inventors: Takanori Miyasaka, Yasushi Mutoh, Juntaro Sahara
  • Patent number: 7845231
    Abstract: A resonance shear measuring method capable of simple and rapid measurement by obtaining a resonance shear curve through Fourier transformation of a damping curve of an oscillation on one side surface of a sample during measurement of shear response from the sample is provided.
    Type: Grant
    Filed: September 27, 2006
    Date of Patent: December 7, 2010
    Assignee: Japan Science and Technology Agency
    Inventors: Kazue Kurihara, Hiroshi Sakuma, Masashi Mizukami
  • Patent number: 7779690
    Abstract: Systems and methods for analyzing the resonant frequency of vibratory wires within vibratory wire gauges. The resonant frequency of the vibrating wire is determined by using an interface that digitizes the response of an excited wire in the gauge. A transform then converts the digitized data into a frequency spectrum. The resulting spectrum is used to estimate the resonant frequency of the vibrating wire. The resulting measurement or estimate of the resonant frequency can be used to measure or determine some physical characteristic of the device or structure or system connected to the gauge.
    Type: Grant
    Filed: February 6, 2007
    Date of Patent: August 24, 2010
    Assignee: Campbell Scientific, Inc.
    Inventors: Larry Eugene Jacobsen, David L. Israelsen, Jody A. Swenson
  • Patent number: 7770458
    Abstract: The invention relates to a method of detecting damage in a bearing supporting at least one rotary shaft of an engine in rotation, the method consisting in: defining a measurement period corresponding to a range of speeds of rotation of the shaft during renewable activity at low speeds of operation of the engine; acquiring over the entire measurement period a vibratory signal representative of acceleration of components of the engine; sampling the vibratory signal as a function of the speed of rotation of the shaft during the measurement period; transforming the sampled vibratory signal into a frequency signal to obtain frequency spectrum lines as a function of the speed of rotation of the shaft; calculating the mean of the amplitudes of the spectrum lines; determining amplitude peaks around multiples of the theoretical frequency of a damaged roller; calculating the ratio between each amplitude peak and the amplitude level determined for a sound bearing; and comparing the ratio that is obtained with at least o
    Type: Grant
    Filed: February 28, 2008
    Date of Patent: August 10, 2010
    Assignee: SNECMA
    Inventors: Serge Blanchard, Julien Griffaton
  • Publication number: 20100102976
    Abstract: The present invention provides a system and method for monitoring vibration of a power transformer. The system comprises at least one vibration sensor operably mounted to the outer case of a transformer for sensing vibration of the power transformer; a spectrum analyzer for processing the vibration signal from the vibration sensor, the spectrum analyzer generating a frequency spectrum of the vibration signal and calculating a velocity rating from the frequency spectrum; a diagnosing means for evaluating the velocity rating of the vibration signal, the diagnosing means assigning a vibration grade for each velocity rating, the diagnosing means finding the maximum velocity rating; and a means for dispatching a control message to an operator when the maximum velocity rating reaches a threshold value. It can be appreciated that the mechanical health of a large-sized transformer can be managed in a systematic and efficient manner during its operation.
    Type: Application
    Filed: December 29, 2008
    Publication date: April 29, 2010
    Applicant: Korea Electric Power Corporation
    Inventors: Wook Ryun Lee, Jun Shin Lee, Yong Chae Bae, Byong Han Kim, Sang Kil Lee
  • Patent number: 7690258
    Abstract: An impact elastic wave test is conducted to measure propagating waves in a pipe to be examined, a frequency spectrum of the propagating waves is analyzed, and at least a spectral area value in a first frequency region and a spectral area value in a second frequency region of the frequency spectrum are evaluated, thereby determining a type of a deteriorated state of the buried pipe.
    Type: Grant
    Filed: July 26, 2005
    Date of Patent: April 6, 2010
    Assignees: Sekisui Chemical Co., Ltd., Gifu University
    Inventors: Takushi Minagi, Hiroshi Iida, Masanori Asano, Toshiro Kamada
  • Patent number: 7640139
    Abstract: Provided are an envelope processor 103, for obtaining an envelope for a detected signal; a FFT unit 104, for converting the envelope into a frequency spectrum; a peak detector 105, for smoothing the frequency spectrum by calculating a moving average, for further performing smoothing and differentiation for the spectrum, and detecting, as peaks, frequency points at which a sign of a differential coefficient is changed from positive to negative, for extracting peaks having a predetermined threshold value or greater, and for sorting the extracted peaks and detecting upper peaks; and a diagnosis processor T, for diagnosing an abnormality based on the detected peaks.
    Type: Grant
    Filed: October 17, 2005
    Date of Patent: December 29, 2009
    Assignee: NSK Ltd.
    Inventors: Juntaro Sahara, Yasushi Mutoh, Takanori Miyasaka, Masanobu Yamazoe
  • Publication number: 20090314092
    Abstract: A method for identifying an unfolded non-synchronous blade vibration frequency in blades on a rotating rotor using a plurality of probes spaced from each other about the rotor. A set of data is acquired from the probes during a predetermined number of rotor revolutions and is processed using a Fourier analysis to generate an output representative of frequencies and phase shift angles corresponding to blade vibrations. The phase shift angles are used to identify a subharmonic for a blade vibration frequency to provide an output identifying the vibration frequency. A space dispersion and time dispersion of probes is described to increase the accuracy of the subharmonic determination using the phase shift angles.
    Type: Application
    Filed: June 18, 2008
    Publication date: December 24, 2009
    Applicant: SIEMENS POWER GENERATION, INC.
    Inventor: Michael Twerdochlib
  • Publication number: 20090249880
    Abstract: Methods and systems for detecting wafer shift/slide in a semiconductor process chamber have been disclosed. The vibration amplitude is measured in terms of acceleration because an increase in vibrational acceleration correlates with an increase of displacement of a wafer. The vibration of a chamber is measured. External vibratory forces acting on the chamber may be transmitted to the wafer inside the chamber. The methods/systems determine if there is a net resultant force that may cause an unconstrained wafer to move from its original position in a chamber by measuring the relative chamber vibrations in three orthogonal directions. A tri-axial or three uni-axial accelerometers are mounted on a preferably exterior wall of the chamber to measure its vibration amplitude. The signal obtained as a function of time is then compared against a predetermined alarm amplitude to provide notification for corrective action.
    Type: Application
    Filed: April 7, 2008
    Publication date: October 8, 2009
    Inventor: Khoon Peng Lim
  • Patent number: 7559240
    Abstract: Degradation of the lubricant due to contamination of the lubricant with wear particles or moisture, which greatly affects the service life of rolling bearings, can be detected in a cost-effective manner through the use of a resonance frequency band signal or high-frequency signal of an accelerometer, and the service life of a rolling bearing can be estimated with high precision at an early stage on the basis of the detected state of the wear particles and lubricant.
    Type: Grant
    Filed: March 29, 2005
    Date of Patent: July 14, 2009
    Assignees: Chugoku Electric Power Co., Inc.
    Inventors: Takuzo Iwatsubo, Isao Shiromaru, Makoto Tanaka, Yoshibobu Akamatsu, Hideko Nagayasu, legal representative, Shingo Boda, Yoji Nagayasu
  • Patent number: 7555951
    Abstract: A system may be used to indicate a need for replacement of a vibrating structure and includes a sensor, an indicator, and a processor. The sensor senses a frequency of vibration of the vibrating structure. The indicator is controlled to provide an indication of the need for replacement of the vibrating structure. The processor compares the frequency of vibration of the vibrating structure to data that relates the vibration frequency of the vibrating structure to fatigue damage of the vibrating structure, and controls the indicator based on the comparison.
    Type: Grant
    Filed: May 24, 2006
    Date of Patent: July 7, 2009
    Assignee: Honeywell International Inc.
    Inventors: Andleeb Shadman, Rafeek Sainudeen, Sundararajan Viswanathan, Ranjan Ganguli, Hasham H. Chougule
  • Patent number: RE42197
    Abstract: A method for compensating for a mechanical oscillation which has a frequency spectrum which can be approximately represented by a number of discrete frequency components, at a machine shaft via at least one actuator acting directly or indirectly upon the machine shaft. At least upon one of the discrete frequency components of the mechanical oscillation is superposed by the actuator, independently of the other frequency components, at least one substantially harmonic torque of the same frequency having a specific amplitude and phase in such a manner that the amplitude of the oscillation of the machine shaft at the this frequency is reduced.
    Type: Grant
    Filed: September 27, 2006
    Date of Patent: March 8, 2011
    Assignee: Heidelberger Druckmaschinen AG
    Inventor: Matthias Noell