Using Fourier Method Patents (Class 702/77)
  • Patent number: 11368011
    Abstract: An intermediate relay maloperation preventing device and method based on an improved recursive wavelet algorithm is provided. The device includes a power supply module, a voltage sampling circuit, an analog-to-digital conversion module, a DSP chip, and a relay maloperation signal shielding module. The voltage sampling circuit is connected to the analog-to-digital conversion module. The analog-to-digital conversion module is connected to the DSP chip. The DSP chip is connected to and controls a relay signal control module. The voltage sampling circuit collects a voltage. An improved recursive wavelet is used to extract a voltage feature. As such, identification of a fault signal and a normal signal is achieved, and real-time fault monitoring is accomplished. The detection method may be easily implemented, exhibits good filtering performance and anti-interference capability, delivers high detection accuracy, and may accomplish real-time online monitoring of intermediate relay faults.
    Type: Grant
    Filed: July 31, 2020
    Date of Patent: June 21, 2022
    Inventors: Yigang He, Jianbo Zhou, Hui Zhang, Liulu He, Weibo Yuan, Yi Ruan, Bing Li
  • Patent number: 11353612
    Abstract: The present disclosure describes methods and systems for estimating dispersion spectra for full waveform sonic (FWS) logging. One computer-implemented method includes receiving FWS data, performing frequency-spatial (FX) transform on the FWS data, using a nonstationary predictive error filtering (PEF) inversion on the transformed FWS data to estimate local matrix L and matrix P, calculating an inverse covariance matrix based on the estimated local matrix L and matrix P, and obtaining a nonstationary maximum likelihood method (MLM) spectra based on the inverse covariance matrix.
    Type: Grant
    Filed: March 11, 2019
    Date of Patent: June 7, 2022
    Assignee: Saudi Arabian Oil Company
    Inventors: Xuekai Sun, Chris B. Ayadiuno
  • Patent number: 11341588
    Abstract: During operation, the system receives time-series signals gathered from sensors in a utility system asset. Next, the system uses an inferential model to generate estimated values for the time-series signals, and performs a pairwise differencing operation between actual values and the estimated values for the time-series signals to produce residuals. The system then performs a sequential probability ratio test (SPRT) on the residuals to produce SPRT alarms. Next, the system applies an irrelevance filter to the SPRT alarms to produce filtered SPRT alarms, wherein the irrelevance filter removes SPRT alarms for signals that are uncorrelated with previous failures of similar utility system assets. The system then uses a logistic-regression model to compute an RUL-based risk index for the utility system asset based on the filtered SPRT alarms. When the risk index exceeds a threshold, the system generates a notification indicating that the utility system asset needs to be replaced.
    Type: Grant
    Filed: September 4, 2019
    Date of Patent: May 24, 2022
    Assignee: Oracle International Corporation
    Inventors: Edward R. Wetherbee, Kenny C. Gross
  • Patent number: 11219382
    Abstract: A heartbeat measurement device includes a transmitter configured to transmit a transmission signal from a transmission antenna to a person to be measured, a receiver configured to receive a signal reflected from the person to be measured as a reception signal using a reception antenna, and an orthogonal detection circuit configured to generate an I signal that is an in-phase component of the transmission signal and the reception signal and a Q signal that is a quadrature component of the transmission signal and the reception signal. The heartbeat measurement device further includes a Fourier transform unit configured to calculate a spectrum in positive and negative frequency domains on the basis of the I signal and the Q signal and a signal processing unit configured to compare positive and negative frequency components in the spectrum to extract a heartbeat component.
    Type: Grant
    Filed: February 21, 2020
    Date of Patent: January 11, 2022
    Inventor: Koichi Takizawa
  • Patent number: 10853535
    Abstract: A computer-implemented method is provided for simulating a modal frequency response of a real-world object. The computer-implemented method includes dividing a plurality of excitation frequencies into a plurality of excitation frequency subsets, calculating modal frequency responses for at least a portion of the excitation frequencies in a given excitation frequency subset, and generating a simulation of the real-world object based at least in part on the modal frequency responses.
    Type: Grant
    Filed: March 13, 2017
    Date of Patent: December 1, 2020
    Inventor: Mikhail Belyi
  • Patent number: 10832701
    Abstract: A pitch detection method. Such a pitch detection method may use Teager Energy Operator (TEO) and High Passed Filter (HPF) with Pseudo Weigner Ville Transformation (PWVT) to reduce the pitch deletion errors of highly correlated types of noises in a speech signal.
    Type: Grant
    Filed: December 28, 2018
    Date of Patent: November 10, 2020
    Assignee: OmniSpeech LLC
    Inventor: Vahid Khanagha
  • Patent number: 10809287
    Abstract: A method and system for measuring alternating-current system quantities through measurement connections producing frequency-dependent errors, in which method the analog signal of at least one measurement channel is sampled at a selected an approximately measured frequency fm at a multiple frequency fs, creating a base series depicting a period on each measurement channel, from each base series the fundamental frequency and the magnitude or phase-angle values or both of at least one harmonic frequency component are calculated with the aid of Fourier analysis or similar, each of which is corrected with the aid of a calibrated frequency-dependent function k(f), when the selected quantities are calculated from the calibrated values.
    Type: Grant
    Filed: March 7, 2019
    Date of Patent: October 20, 2020
    Assignee: Arcteq Relays Oy
    Inventor: Tero Virtala
  • Patent number: 10628930
    Abstract: This invention provides a system and method for fusing and synthesizing a plurality of medical images defined by a plurality of imaging parameters allowing visual enhancements of each image data set to be combined. The system provides an image fusion process/processor that fuses a plurality of magnetic resonance imaging datasets. A first image dataset of the datasets is defined by apparent diffusion coefficient (ADC) values. A second image dataset of the MRI datasets is defined by at least one parameter other than the ADC values. The image fusion processor generates a fused response image that visually displays a combination of image features generated by the ADC values combined with image features generated by the at least one parameter other than the ADC values. The fused response image can illustratively include at least one of color-enhanced regions of interest and intensity-enhanced regions of interest.
    Type: Grant
    Filed: May 12, 2016
    Date of Patent: April 21, 2020
    Inventor: Senthil Periaswamy
  • Patent number: 10539596
    Abstract: A system and method are provided to perform current sensor error compensation. The system and method involve obtaining a current measurement of a current on a circuit from a current sensor; obtaining a voltage measurement of a voltage associated with the current from a voltage sensor; determining a fundamental frequency of the voltage from the voltage measurement; and performing error compensation on the current measurement based on the determined fundamental frequency to produce a corrected current measurement. The current sensor error compensation may be performed to correct current measurements in a motor system, such as in a motor overload relay, at a low cost by using functionality already available in the system.
    Type: Grant
    Filed: December 21, 2017
    Date of Patent: January 21, 2020
    Assignee: Schneider Electric USA, Inc.
    Inventors: Kevin M. Jefferies, Benjamin W. Edwards, Matthew L. White, Alan E. Freeman
  • Patent number: 10422774
    Abstract: A system for detecting an abnormality of rotating machines includes two or more devices for detecting an abnormality and a computer. The respective devices include a sensor for detecting vibration of the respective rotating machines and generating signals indicative of the vibration, and a transmitting unit for transmitting the signals to the computer. The computer includes a sampler for sampling the signals with a sampling frequency and outputting, at a time at intervals of a predetermined period, a plurality of the data detected and sampled within the predetermined period, a storage for storing the data, a frequency analyzer for analyzing the frequencies of the data, a determination unit for determining whether the machines have an abnormality based on the results of the frequency analysis, and a display unit for displaying, in chronological order and in real time, the results of the frequency analysis and displaying the results of the determination.
    Type: Grant
    Filed: December 28, 2016
    Date of Patent: September 24, 2019
    Assignee: Kobe Steel, Ltd.
    Inventors: Kaname Araki, Eiji Takahashi, Shugo Takaki, Masato Hayashi
  • Patent number: 10393865
    Abstract: The invention is an iterative process for performing iteratively the phase retrieval of an adaptive signal x(t) matching two sets of constraint both concerning the time envelope ue(t) of signal x(t) and magnitude distribution Um(f) of its spectral representation. At each iteration k the process computes an estimate {tilde over (x)}k(t) of signal x(t) which is obtained from a first projection PA on a first set of constraint in time domain of a computed value xk(t) of x(t), xk(t) deriving from an estimate {tilde over (X)}k?1(f) of the spectrum of signal x(t), said estimate {tilde over (X)}k?1(f) being itself obtained from a second projection PB on a second set of constraints in spectral domain of the Fourier transform Xk(f) of the estimate {tilde over (x)}k?1(t) of x(t) computed at iteration k?1. Iterative computation of estimate {tilde over (x)}k(t) is repeated until {tilde over (x)}k(t) meets a predefined criterion which indicates that estimate {tilde over (x)}k(t) is close enough to expected signal x(t).
    Type: Grant
    Filed: December 11, 2013
    Date of Patent: August 27, 2019
    Assignee: Airbus SAS
    Inventors: Guillaume Alleon, Kaushal Jadia, Rajan Srinivasan, Avik Santra
  • Patent number: 10230584
    Abstract: Systems and methods for dynamic multitone simulation scenario planning. A method commences upon accessing a server in a circuit simulation environment to generate a multitone simulation signal to accurately simulate non-linear circuit characteristics. The tones of the multitone simulation signal are derived from a subset of possible tones based on certain properties. Some properties serve to eliminate harmonic and intermodulation products that conflict with the tones in the subset. The amplitude and phase for each tone is determined based on certain constraints. A multitone transient signal is generated from the selected tone subset and associated tone attributes to facilitate a circuit simulation. Characteristics of the multitone transient signal and/or simulation results from the circuit simulation can be analyzed to facilitate dynamically planning simulation scenarios that use multitone simulation signals.
    Type: Grant
    Filed: July 1, 2016
    Date of Patent: March 12, 2019
    Inventors: Hari Shankar, Ariel Nachum, Ariel Leonardo Vera Villarroel
  • Patent number: 10128924
    Abstract: A state of a detection signal received from a proximity detector is determined. The first proximity detector is incorporated with a primary antenna at an information handling system. The proximity detector can assert the detection signal in response to detecting that an object external to the information handling system is located close to the proximity detector. A second antenna is coupled to a wireless communication circuit at the information handling system if the detection signal is asserted.
    Type: Grant
    Filed: June 23, 2014
    Date of Patent: November 13, 2018
    Assignee: DELL PRODUCTS, LP
    Inventors: Ching-Wei Chang, I-Yu Chen
  • Patent number: 9946687
    Abstract: A method for generating a Fast Fourier Transform (FFT) is disclosed. The method includes providing an input signal to two or more fixed-point FFT algorithms that apply different scaling to reduce growth of their output, resulting in each of the FFT algorithms yielding an array of FFT output values characterized by a different gain. The method further includes determining, on a per-FFT output value basis, whether an output value of an FFT algorithm with a relatively high gain was clipped due to saturation. If not, then the output value of that FFT algorithm is included in the final FFT. Otherwise, an output value of an FFT algorithm with a lower gain is included in the final FFT. Reconstructing the final FFT by such combination of values from different FFTs allows benefiting from the advantages of both higher- and lower-gain FFTs while avoiding or minimizing their disadvantages.
    Type: Grant
    Filed: January 28, 2016
    Date of Patent: April 17, 2018
    Assignee: ANALOG DEVICES, INC.
    Inventor: Boris Lerner
  • Patent number: 9945821
    Abstract: Composite sampling of a fluid flowing through a conduit includes collecting, in a vessel coupled to the conduit through which the fluid is flowing, a first discrete sample of fluid from the conduit, the first discrete sample having a first selected volume, and collecting, in the vessel and at a first interval from the first sample, a second discrete sample of the fluid from the conduit, the second discrete sample having a second selected volume, thereby forming a composite sample in the vessel while the vessel is coupled to conduit. The composite sample includes the first discrete sample and the second discrete sample, and may include one or more additional discrete samples. An apparatus for collecting the composite sample includes a gas chromatograph, and is arranged such that the composite sample is provided to the gas chromatograph without removing the composite sample from the apparatus or transporting the composite sample.
    Type: Grant
    Filed: July 21, 2015
    Date of Patent: April 17, 2018
    Assignee: SGS North America Inc.
    Inventors: Wayne A. Kriel, Sven Lataire
  • Patent number: 9934199
    Abstract: In order to reduce the power consumed when using FFT processing and filtering in the frequency domain together, a digital filter device according to the present invention is provided with: a first filtering means for performing a first fast Fourier transformation using a first data sorting process, first filtering in the frequency domain, a first inverse fast Fourier transformation using a second data sorting process, and overlap removal on a first input block including overlapped data; a second filtering means for performing a second fast Fourier transformation, which simultaneously processes all data in a second input block including overlapped data, second filtering in the frequency domain, a second inverse fast Fourier transformation, which simultaneously processes all received filtered data, and overlap removal; and a data selection means for selecting either the first filtering means or the second filtering means, wherein the operation of the filtering means that is not selected by the data selection me
    Type: Grant
    Filed: June 20, 2014
    Date of Patent: April 3, 2018
    Inventor: Atsufumi Shibayama
  • Patent number: 9858240
    Abstract: A test and measurement instrument having initial display center frequency and span settings and configured to process an input signal is disclosed. The test and measurement instrument includes a processor configured to digitize the input signal and locate a primary peak and determine a primary peak center frequency of the input signal. The processor is configured to adjust the initial display center frequency setting based on the primary peak center frequency. The processor is configured to perform a bandwidth comparison by comparing a bandwidth of the primary peak at a peak bandwidth test level to a peak bandwidth threshold. The processor is configured adjust the initial span setting based on the bandwidth comparison and generate a processed waveform signal using the adjusted display center frequency and span settings.
    Type: Grant
    Filed: December 13, 2012
    Date of Patent: January 2, 2018
    Assignee: Tektronix, Inc.
    Inventors: Ian S. Dees, Thomas L. Kuntz, David L. Suryan
  • Patent number: 9544039
    Abstract: A method for detecting the digital quality of a radio signal includes: receiving a radio signal including an analog modulated portion; digitally sampling an analog modulated portion of the radio signal to produce a plurality of samples; using a ratio between an average magnitude and an RMS magnitude of a block of the samples to compute an analog signal quality metric. Receivers that implement the method are also provided.
    Type: Grant
    Filed: October 22, 2015
    Date of Patent: January 10, 2017
    Assignee: iBiquity Digital Corporation
    Inventors: Brian W. Kroeger, Paul J. Peyla
  • Patent number: 9449128
    Abstract: A device may receive information that identifies a set of input frequencies and a set of output frequencies associated with a circuit. The device may determine, based on the set of input frequencies and the set of output frequencies, a set of fundamental frequencies associated with the circuit, and a harmonic order corresponding to one or more fundamental frequencies in the set of fundamental frequencies, where the one or more fundamental frequencies and the corresponding harmonic orders are based on a quantity of harmonic frequencies associated with the circuit. The device may output or store the one or more fundamental frequencies and the corresponding harmonic orders.
    Type: Grant
    Filed: November 29, 2012
    Date of Patent: September 20, 2016
    Assignee: The MathWorks, Inc.
    Inventors: Danil Kirsanov, Mark Reichelt
  • Patent number: 9250060
    Abstract: An optical coherence tomography system having real-time artifact and saturation correction includes an optical coherence tomography unit, and a signal processing and display system adapted to communicate with the optical coherence tomography unit to receive imaging signals therefrom. The optical coherence tomography system is a Fourier Domain optical coherence tomography system. The signal processing and display system includes a parallel processor configured to correct the imaging signals, in real time, to at least partially remove image artifacts and saturation based on a subset of image data within an image frame.
    Type: Grant
    Filed: August 15, 2012
    Date of Patent: February 2, 2016
    Assignee: The Johns Hopkins University
    Inventors: Jin Ung Kang, Yong Huang
  • Patent number: 9171113
    Abstract: Methods and systems are provided for computing IR drop, i.e., voltage drop, in a semiconductor device. The method includes generating a modeling element corresponding to the plurality of transistors. At least one of the transistors in the modeling element is replaced with a current source. The method also includes performing an IR drop analysis of the modeling element utilizing a software program to calculate the IR drop in the semiconductor device.
    Type: Grant
    Filed: June 3, 2014
    Date of Patent: October 27, 2015
    Inventors: Torsten Schaefer, Dirk Fimmel, Hendrik Thomas Mau
  • Patent number: 9170599
    Abstract: A method utilizes an optical image processing system. The method includes calculating a product of (i) a measured magnitude of a Fourier transform of a complex transmission function of an object or optical image and (ii) an estimated phase term of the Fourier transform of the complex transmission function. The method further includes calculating an inverse Fourier transform of the product, wherein the inverse Fourier transform is a spatial function. The method further includes calculating an estimated complex transmission function by applying at least one constraint to the inverse Fourier transform.
    Type: Grant
    Filed: November 7, 2011
    Date of Patent: October 27, 2015
    Assignee: The Board of Trustees of the Leland Stanford Junior University
    Inventors: Aydogan Ozcan, Michel J. F. Digonnet, Gordon S. Kino
  • Patent number: 9130816
    Abstract: System and method are disclosed for synchronization of a transmitting device and a receiving device that communicate with each other via pulse modulation. The synchronization technique entails the transmitting device sending one or more quasi-periodic pulse sequences to the receiving device. A quasi-periodic pulse sequence is based on a substantially periodic pulse sequence, and may include some non-periodic pulses or not include some periodic pulses. The transmitting device may transmit frames each including a preamble that comprises one or more quasi-periodic pulse sequences, and a data payload that may comprise data. The receiving device receives the signal, generates samples of the signal, and detects the quasi-periodic pulse sequences in the received signal by analyzing samples based on a sample associated with a pulse and the period associated with the substantially periodic pulse sequence.
    Type: Grant
    Filed: April 10, 2014
    Date of Patent: September 8, 2015
    Assignee: QUALCOMM Incorporated
    Inventors: Petru Cristian Budianu, Jun Shi, David Jonathan Julian
  • Patent number: 9063314
    Abstract: Embodiments of the present invention recite a data collector with expanded functionality and a method of enhancing revenue generation using a data collector with expanded functionality. In one embodiment, a central unit of a data collector is configured to receive a replaceable unit such that any one of a variety of replaceable units can be configure to be attached to said central unit.
    Type: Grant
    Filed: March 12, 2013
    Date of Patent: June 23, 2015
    Assignee: Trimble Navigation Limited
    Inventors: Dennis York, John Paul Harmon, Craig Jurs, Gerald Steiger, Timothy James Jondrow, Robert Nicol
  • Patent number: 8990033
    Abstract: A computer-implemented method, system, and/or computer program product monitors operational conditions of a cargo ship. A baseline composite vibration pattern is established from readings generated by multiple smart sensors. Each of the multiple smart sensors is a uniquely-identified smart sensor that has been affixed to one of multiple intermodal shipping containers that have been loaded onto a cargo ship, and each smart sensor includes a vibration sensor for detecting mechanical vibration. Subsequent readings are then taken from the multiple smart sensors to generate a new composite vibration pattern. In response to the new composite vibration pattern being different from the baseline composite vibration pattern, the new composite vibration pattern is matched with a known composite vibration pattern in order to identify a cause of the new composite vibration pattern.
    Type: Grant
    Filed: July 27, 2011
    Date of Patent: March 24, 2015
    Assignee: International Business Machines Corporation
    Inventors: Robert R. Friedlander, James R. Kraemer
  • Patent number: 8963733
    Abstract: A system includes more sensors configured to measure one or more characteristics of rotating equipment and a blind fault detection device. The blind fault detection device includes an input interface configured to receive at least one input signal from the one or more sensors. The blind fault detection device also includes a processing unit configured to identify a fault in the rotating equipment using the at least one input signal. The blind fault detection device further includes an output interface configured to provide an indicator identifying the fault. The processing unit is configured to identify the fault by determining at least one family of frequencies related to at least one sensor point, determining an average energy for the at least one sensor point based on the at least one family of frequencies, and comparing the average energy to a baseline value.
    Type: Grant
    Filed: February 13, 2012
    Date of Patent: February 24, 2015
    Assignee: Honeywell International Inc.
    Inventors: Chinmaya Kar, Rajat Sadana, Joydeb Mukherjee
  • Patent number: 8954286
    Abstract: A waveform acquiring unit acquires a time waveform of an electromagnetic wave. The time waveform is decomposed into wavelet expansion coefficients by wavelet transform. Influence levels of the respective wavelet expansion coefficients to a spectrum are calculated. The wavelet expansion coefficients are weighted based on at least the influence levels of the wavelet expansion coefficients to the spectrum. The weighted wavelet expansion coefficients are converted into time waveforms by inverse wavelet transform. Thus, the time waveforms that holds spectrum information needed for spectroscopic analysis and has a reduced noise is provided.
    Type: Grant
    Filed: July 30, 2013
    Date of Patent: February 10, 2015
    Assignee: Canon Kabushiki Kaisha
    Inventor: Michinori Shioda
  • Patent number: 8942939
    Abstract: The invention discloses a real-time detection system for detecting the real-time machining by a rotating machine or rotating quality thereof. The real-time detection system comprises a signal capture module, a preprocessor, a processor and a comparison module. The signal capture module is used to capture a time-sequence signal of the rotating machine. The preprocessor is coupled to the signal capture module for receiving the time-sequence signal and generating a stationary time-sequence signal. The processor is coupled to the preprocessor for receiving the stationary time-sequence signal and calculating a plurality of entropies of the stationary time-sequence signal. The comparison module with an entropy table or a feature judgment mechanism of the entropy variation is coupled to the processor for receiving the plurality of entropy and comparing the plurality of entropy according to the entropy table or the feature judgment of the entropy variation and generating a quality signal.
    Type: Grant
    Filed: May 23, 2011
    Date of Patent: January 27, 2015
    Assignee: National Taiwan University of Science and Technology
    Inventors: Jia Wang, Fuh-Yu Chang
  • Patent number: 8890060
    Abstract: A method of processing an image charge/current signal representative of trapped ions undergoing oscillatory motion. The method includes applying a validity test to each of a plurality of peaks in the image charge/current signal in the frequency domain, wherein applying the validity test to a peak in the image charge/current signal in the frequency domain includes determining whether a phase angle associated with the peak meets a predetermined condition. The method also includes forming a new image charge/current signal that: includes data representative of one or more peaks that have passed the validity test; and excludes data representative of one or more peaks that have failed the validity test. The method may be performed by a mass spectrometry apparatus.
    Type: Grant
    Filed: March 7, 2014
    Date of Patent: November 18, 2014
    Assignee: Shimadzu Corporation
    Inventors: Li Ding, Ranjan Badheka
  • Patent number: 8882883
    Abstract: Apparatus and methods are disclosed that allow for the monitoring and analysis of production process data for a multi-step asynchronous cyclic production process (e.g. pressure swing adsorption) in a steady state plant (such as a steam methane reforming plant). Data collected from cooperating sensors is processed applying a moving window discrete Fourier transform (DFT). The transformed data can be further analyzed in the broader steady-state plant environment to accurately detect any process anomalies and avoid false alarms.
    Type: Grant
    Filed: January 9, 2013
    Date of Patent: November 11, 2014
    Assignee: Air Products and Chemicals, Inc.
    Inventors: Erdem Arslan, Debashis Neogi, Xianming Jimmy Li, Pratik Misra
  • Patent number: 8874374
    Abstract: A method and system for determining a rate of turbulent kinetic energy dissipation (TKED) in a turbulent fluid environment are provided. A light source provided at a first end of a predetermined path-length passes a beam of light through the turbulent fluid environment. An angle of arrival detection unit detects the angle of arrival of the at least one beam of light. The angle of arrival is then processed at a processing unit that calculates temperature dissipation spectra as a function of the autocorrelation of the angle of arrival. The peak of the temperature dissipation spectra represents the rate of TKED. A number of turbulent quantities can be determined by using the method and system.
    Type: Grant
    Filed: September 21, 2011
    Date of Patent: October 28, 2014
    Inventor: Darek J. Bogucki
  • Patent number: 8843336
    Abstract: A method of detecting a trigger event includes receiving an input signal for analysis. The received input signal is used to generate first data corresponding to sequential sets of spectral output data sets, at least some of the spectral output data sets corresponding to sample points in time acquired from the input signal as the input signal changes with time. At least part of the first data is then compared with second data, the second data corresponding to a predetermined sequential set of signature spectral data sets corresponding to a time-varying spectrum associated with a trigger event. A trigger signal is then generated in response to a change in a state of match between the at least part of first and second data.
    Type: Grant
    Filed: September 22, 2008
    Date of Patent: September 23, 2014
    Assignee: Agilent Technologies, Inc.
    Inventor: Peter Cain
  • Patent number: 8818746
    Abstract: A simple, inexpensive, and fast method of establishing if a defect does or does not exist within a thick-walled solid geometry, which is especially useful to detect if such a defect, a crack, exists within a gun barrel. With further analysis, the method allows not only the identification of the defect's presence; but, a means of establishing the size thereof—which, for example, is critical to understanding if a gun tube has a defect that would warrant its being taken out of service for the safety of its crew or removed from manufacturing. The method involves creating an acoustic vibration in the particular thick-walled, solid geometry, esp. a gun barrel, and observing the vibration pattern which results.
    Type: Grant
    Filed: March 25, 2011
    Date of Patent: August 26, 2014
    Assignee: The United States of America as Represented by the Secretary of the Army
    Inventors: Mark A. Johnson, Moayyed A. Hussain, Edward J. Troiano
  • Patent number: 8804129
    Abstract: The invention relates to a method and an apparatus for measuring the thickness of a transparent film by broad band interferometry, comprising the steps of preparing a correlogram of the film by an interferometer, applying a Fourier transformation to said correlogram to obtain a Fourier phase function, removing a linear component thereof, applying a second integral transformation to the remaining non-linear component to obtain an integral amplitude function of said non-linear component, identifying the peak location of said integral amplitude function and determining the thickness of the film as the double value of the abscissa at said peak location considering a refractive index of a film which is dependent on wavelength. The last two steps may be replaced by identifying the peak locations of said integral amplitude function and determining the thickness of the films as the double values of the abscissas at the peak locations.
    Type: Grant
    Filed: May 4, 2012
    Date of Patent: August 12, 2014
    Assignee: Mitutoyo Corporation
    Inventor: Ki-Nam Joo
  • Patent number: 8744637
    Abstract: The objective of this patent is to describe novel methods and device systems for detecting the fault-cleared state in a shunt compensated transmission line. The methods are applicable in all types of transmission line types and faults, in any type of reclosure mechanism, and can be implemented in existing devices such as relays and not need sophisticated equipment. One application of detecting the fault-cleared state is adaptive reclosure in which case, substantial improvement in transmission system reliability and benefits in protection can be achieved.
    Type: Grant
    Filed: September 12, 2013
    Date of Patent: June 3, 2014
    Inventor: Deepak Maragal
  • Patent number: 8731857
    Abstract: A test and measurement instrument converts digital data that represents an input signal into a series of frequency spectra and accumulates frequency spectra into a bitmap database in response to a gating signal. In some embodiments, the gating signal is generated when the instantaneous power of the input signal violates a power threshold.
    Type: Grant
    Filed: June 29, 2010
    Date of Patent: May 20, 2014
    Assignee: Tektronix, Inc.
    Inventor: Alfred K. Hillman, Jr.
  • Patent number: 8706435
    Abstract: A test and measurement instrument converts digital data that represents an input signal into a plurality of bitmaps, and then subtracts one of the bitmaps from another one of the bitmaps to produce a difference bitmap. The difference bitmap does not contain density values that are common to the two bitmaps, but instead only contains the density differences between the two, thereby revealing very small density variations in the presence of large density values. In some embodiments, the difference bitmap is displayed on a display device. In other embodiments, the difference bitmap is used to generate a trigger signal.
    Type: Grant
    Filed: May 28, 2010
    Date of Patent: April 22, 2014
    Assignee: Tektronix, Inc.
    Inventors: Kathryn A. Engholm, John F. Turpin
  • Patent number: 8674680
    Abstract: A method and device are provided for fast impedance measurement of a biological object having dynamically varying in time parameters, wherein a titlet shaped pulse is introduced into the object and a voltage response signal is measured and analyzed by a processing unit for estimating the impedance of the object. The titlet pulse has a start frequency substantially in one end of the frequency range of interest and a stop frequency substantially in the other end of the frequency range of interest and a duration of the titlet pulse is one cycle or less.
    Type: Grant
    Filed: October 25, 2010
    Date of Patent: March 18, 2014
    Assignee: Tallinn University of Technology OÜ Eliko Tehnoloogia Arenduskeskus
    Inventors: Mart Minn, Toivo Paavle, Raul Land, Paul Annus, Toomas Parve
  • Patent number: 8676543
    Abstract: Mechanical oscillators employ the use of resonance parameters, frequency and the quality factor Q, for the measurement of corrosion or deposition. The ability of a mechanical oscillator to measure small amounts of metal loss or deposition is not only dependent upon the mechanical design but is limited by the precision in determining the resonance frequency and Q. Methods for measuring these resonance parameters with a high precision in the presence of noise are provided. The increased degree of precision improves the utility of these devices as sensitive probes for corrosion and deposition (fouling) measurement. The increased degree of precision is enabled in part by employing curve fitting consistent with modeling the mechanical oscillator as a simple harmonic oscillator. This curve fitting procedure, combined with averaging and utilizing signal processing parameters to mitigate noise effects, adds precision in measuring resonance parameters.
    Type: Grant
    Filed: June 2, 2010
    Date of Patent: March 18, 2014
    Assignee: ExxonMobil Research and Engineering Company
    Inventors: H. Alan Wolf, Chung-Min Cheng, Dalia G. Yablon, Alan M. Schilowitz, Manuel S. Alvarez, Yvonne Mathez
  • Patent number: 8639462
    Abstract: A method of estimating the time of flight of a burst signal includes: receiving the burst signal; determining the slope of the phase characteristic of the Fourier transform of the received burst signal; and estimating the time-of-flight of the burst signal from the slope of the phase characteristic of the Fourier transform of the received burst signal.
    Type: Grant
    Filed: May 18, 2010
    Date of Patent: January 28, 2014
    Assignee: Avago Technologies General IP (Singapore) Pte. Ltd.
    Inventor: Osvaldo Buccafusca
  • Patent number: 8612182
    Abstract: A method of isolating a frequency in a rotating machine having at least one sensor includes receiving, from the at least one sensor, a sensor signal that includes at least one frequency, converting the sensor signal to a digital vibration signal, modifying the vibration signal to generate an envelope signal, synchronously oversampling the envelope signal to generate a synchronous envelope signal, and transforming the synchronous envelope signal into a frequency spectrum to isolate the frequency.
    Type: Grant
    Filed: April 13, 2010
    Date of Patent: December 17, 2013
    Assignee: General Electric Company
    Inventors: Dustin Delany Hess, Charles Terrance Hatch
  • Patent number: 8607093
    Abstract: Embodiments relate systems and methods for detecting machine faults in a network using acoustic monitoring. In embodiments, one or more servers, clients, or other machines in a managed network can have a microphone or other acoustic sensor integrated into motherboard or other hardware. The sensor can sample acoustic signals from inside or near the machine, and can digitize that data. The resulting set of acoustic data can be transmitted to a management server or other destination for analysis of the operating sounds related to that machine. For instance, the acoustic data can be analyzed to detect indications of a failed or failing hard drive, for instance by detecting spindle whine or head movement noises, or a failed or failing power supply based on other sounds. The management server can respond to potential fault events for instance by issuing configuration commands, such as instructions to power down the malfunctioning component.
    Type: Grant
    Filed: August 31, 2009
    Date of Patent: December 10, 2013
    Assignee: Red Hat, Inc.
    Inventors: Michael Paul DeHaan, Adrian Karstan Likins, Seth Kelby Vidal
  • Patent number: 8594961
    Abstract: The condition of a structure using remote interrogation of a multi-state passive wireless antenna sensor that has a known resonant frequency when mounted on the structure. The passive wireless antenna sensor is connected to a remotely operated switching circuit that includes a photocell. An interrogation system transmits a series of radio frequency signals with sweeping frequencies around the known resonant frequency to the passive wireless antenna sensor, while simultaneously pulsing a laser to switch the passive wireless antenna sensor between a first state and a second state in which it is exposed to open-circuit or short-circuit conditions. A signal is reflected from the passive wireless antenna sensor in each of the first and second states, and a resonant frequency of the passive wireless antenna sensor is determined by normalizing the received signals to isolate the antenna mode.
    Type: Grant
    Filed: September 9, 2010
    Date of Patent: November 26, 2013
    Assignee: Board of Regents, The University of Texas System
    Inventors: Haiying Huang, Srikar Deshmukh
  • Patent number: 8582675
    Abstract: A pre-channelized spectrum analyzer utilizes a channelizer as a preprocessor for parallel-configured low-resolution spectrum analyzers so as to perform as a high resolution spectrum analyzer. The pre-channelized spectrum analyzer has a polyphase filter that channelizes a signal input and an IFFT that generates filter bank outputs derived from the channelized signal. Spectrum analyzers are in communications with the filter bank outputs so as to generate a spectral decomposition of a subset of those outputs. The spectrum analyzers each perform a window and an FFT function on a corresponding one of the filter bank subset.
    Type: Grant
    Filed: June 1, 2011
    Date of Patent: November 12, 2013
    Inventor: Fredric J. Harris
  • Patent number: 8532207
    Abstract: A method for distinguishing a signal of interest from one or more interference signals in a received analog signal comprises receiving an analog signal at a radio front end, and transmitting the received analog signal to an analog-to-digital converter to sample data in the received analog signal and output a digital signal. A sub-channel Fast Fourier Transform (FFT) is performed on the digital signal, and sub-channel FFT bin magnitudes are averaged over a set period of time to determine a shape of the received signal. The shape of the received signal is compared to one or more signal reference patterns by computing a metric for the shape of the received signal, and computing a metric for the one more signal reference patterns. The computed metrics are then compared to a predetermined threshold value to determine the presence, or lack thereof, of a signal of interest in the received signal.
    Type: Grant
    Filed: May 27, 2011
    Date of Patent: September 10, 2013
    Assignee: Honeywell International Inc.
    Inventors: Colin S. Hanson, Benjamin J. Winstead
  • Patent number: 8527227
    Abstract: A waveform acquiring unit acquires a time waveform of an electromagnetic wave. The time waveform is decomposed into wavelet expansion coefficients by wavelet transform. Influence levels of the respective wavelet expansion coefficients to a spectrum are calculated. The wavelet expansion coefficients are weighted based on at least the influence levels of the wavelet expansion coefficients to the spectrum. The weighted wavelet expansion coefficients are converted into time waveforms by inverse wavelet transform. Thus, the time waveforms that holds spectrum information needed for spectroscopic analysis and has a reduced noise is provided.
    Type: Grant
    Filed: January 5, 2011
    Date of Patent: September 3, 2013
    Assignee: Canon Kabushiki Kaisha
    Inventor: Michinori Shioda
  • Patent number: 8515676
    Abstract: A method for assessing the integrity of a rock mass, the method including impacting the rock mass, capturing an acoustic signal generated as a result of the impact, deriving a frequency distribution for the captured acoustic signal, processing data from the frequency distribution by means of a neural network process applying artificial intelligence to assess the inputted data, and presenting a signal from the neural network process which is indicative of the integrity of the rock mass.
    Type: Grant
    Filed: November 5, 2008
    Date of Patent: August 20, 2013
    Assignee: CSIR
    Inventors: Abraham Van Zyl Brink, Teboho N. Nyareli
  • Patent number: 8504209
    Abstract: Some embodiments of the present invention provide a system that controls a device that generates vibrations in a computer system. During operation, a critical vibration frequency is determined for the computer system. Next, a keep-out zone is generated based on the critical vibration frequency, wherein the keep-out zone specifies a range of frequencies to be avoided. Then, the device is controlled based on the keep-out zone to reduce vibrations generated by the device in the keep-out zone.
    Type: Grant
    Filed: July 29, 2008
    Date of Patent: August 6, 2013
    Assignee: Oracle America, Inc.
    Inventors: Kenny C. Gross, Aleksey M. Urmanov, Kalyanaraman Vaidyanathan
  • Patent number: 8457913
    Abstract: Embodiments of a system that determines a condition associated with an integrated circuit disposed on a circuit board are described. During operation, the system receives electromagnetic-interference (EMI) signals from one or more antennas while the integrated circuit is operating, where the one or more antennas are disposed on the circuit board. Then, the system analyzes the received EMI signals to determine the condition.
    Type: Grant
    Filed: June 4, 2008
    Date of Patent: June 4, 2013
    Assignee: Oracle America, Inc.
    Inventors: Steven F. Zwinger, Kenny C. Gross, Aleksey M. Urmanov
  • Patent number: 8457914
    Abstract: The apparatus corrects multi-phase signals for detecting a position of an object and obtains a phase corresponding to the position of the object. The apparatus includes a correcting unit correcting the multi-phase signals with error coefficients, respectively, a phase calculating unit performing calculation for the corrected multi-phase signals to obtain the phase, a regression unit performing regression for the calculated phases to obtain reference phases, a Fourier transform unit respectively performing Fourier transform for the corrected multi-phase signals whose phases having been respectively changed into the reference phases, and an updating unit updating, using Fourier coefficients obtained by the Fourier transform unit, the error coefficients respectively corresponding to the Fourier coefficients. The updating unit updates the error coefficients if a regression error in the regression performed by the regression unit satisfies a predetermined condition.
    Type: Grant
    Filed: December 2, 2010
    Date of Patent: June 4, 2013
    Assignee: Canon Kabushiki Kaisha
    Inventor: Yuzo Seo