For Noise Removal Or Suppression Patents (Class 702/191)
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Patent number: 8930169Abstract: A capacitive ultrasonic transducer (c-MUT) comprising a silicon substrate and a transducer element which comprises transducer cells, each of which is constituted by a first electrode equipped on the top surface of the silicon substrate, a second electrode placed opposite to the first electrode with a predetermined gap therefrom and a membrane for supporting the second electrode, wherein a trench is equipped between the adjacent transducers and a conductive film is formed in the trench.Type: GrantFiled: March 4, 2011Date of Patent: January 6, 2015Assignee: Olympus CorporationInventors: Hideo Adachi, Katsuhiro Wakabayashi, Akiko Mizunuma, Atsushi Osawa, Tatsuo Kaimai, Shinji Yasunaga, Kiyoshi Nemoto, Miyuki Murakami, Kousei Tamiya, Yu Kondo
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Publication number: 20140358489Abstract: A nonlinearity parameter measuring method and system is configured to separately process a signal of a fundamental wave and second harmonic wave that went through a probe attached to a specimen using a circuit including an analogue band pass filter and intermediate frequency amplifier, and minimize the effects caused by noise, thereby measuring an exact nonlinearity parameter.Type: ApplicationFiled: June 4, 2014Publication date: December 4, 2014Inventors: To KANG, Hunhee KIM, Hak Joon KIM, Taek Gyu LEE, Sungjin SONG
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Publication number: 20140336948Abstract: An apparatus and method for improving signal to noise ratio of a physiological signal is provided. At least one sensor senses the analog data signal, the analog data signal having a first component including ECG data and a second component including ancillary data. A converter is coupled to the at least one sensor that automatically converts the analog data signal into a digital data signal and decimates the digital data signal from a first sample rate to a second sample rate.Type: ApplicationFiled: January 6, 2012Publication date: November 13, 2014Applicant: Draeger Medical Systems, Inc.Inventors: Derek Yong Qin, David Christopher Maurer, Clifford Mark Risher-Kelly
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Patent number: 8878529Abstract: A method for monitoring the function of a sensor module including sensor which generates a measurement signal for a physical quantity to be determined and applies the measurement signal to an output terminal in an unchanged form or in processed form. In addition, a test signal is generated whose spectrum lies outside the spectrum of the measurement signal. The test signal is supplied at a place in the sensor from which it reaches the output terminal in unchanged form or in processed form only in the case of a functional sensor. An output signal present at the output terminal is compared with the test signal and a diagnosis signal is generated, which indicates whether the test signal is present at the output terminal. The test signal is filtered out of the output signal and the remaining signal is applied as the measurement signal at an output of the sensor module.Type: GrantFiled: March 23, 2011Date of Patent: November 4, 2014Assignee: Micronas GmbHInventors: Dieter Baecher, David Muthers, Joerg Franke
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Publication number: 20140316746Abstract: A real-time signal processing system and method based on multi-channel independent component analysis (ICA). A one-pass recursive ICA processor uses a computation module to perform multi-channel ICA on a set of first data to generate a plurality of second data and third data. A noise removing module uses the computation module to identify noise in the second data and remove the identified noise to generate a plurality of fourth data. A reconstruction module uses the computation module to reconstruct the set of first data based on the fourth data and the third data to generate a plurality of fifth data. The one-pass recursive ICA processor, the noise removing module, the reconstruction module and the computation module are all implemented on a single chip, such that the one-pass recursive ICA processor, the noise removing module and the reconstruction module share the same computation module to save hardware resources.Type: ApplicationFiled: April 21, 2014Publication date: October 23, 2014Applicant: National Chiao Tung UniversityInventors: Wai-Chi Fang, Wei-Yeh Shih, Jui-Chien Liao, Kuan-Ju Huang, Chiu-Kuo Chen
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Patent number: 8868379Abstract: A measurement apparatus obtains a reference signal from reference light modulated at a first frequency and a measurement signal from measurement light reflected by a target object modulated at a second frequency along with movement of the target object in addition to the modulation at the first frequency, and processes the reference signal and the measurement signal to measure a position of the target object. Synchronized detection units multiply the measurement signal by a signal synchronized with the reference signal and output signals having the second frequency and harmonic components. Decimation filters filter, at a decimation frequency, the signals output from the synchronized detection units to attenuate the harmonic components.Type: GrantFiled: December 2, 2011Date of Patent: October 21, 2014Assignee: Canon Kabushiki KaishaInventor: Yoshiyuki Okada
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Patent number: 8849616Abstract: An analytical tool useable with complex systems receives as input various system parameters to predict whether sufficiently accurate quality depth data will be provided by the TOF system. Depth data quality estimates involve dividing system operation into smaller operations whose individual depth data quality contributions can be more readily computed. The effect of the individual operations is combined and the tool outputs a depth data quality estimate accounting for the net result of the various unique operations performed by the system. When used with a TOF system, input parameters may include magnitude and angular distribution of TOF emitted optical energy, desired signal/noise, sensor characteristics, TOF imaging optics, target object distances and locations, and magnitude of ambient light. Analytical tool output data can ensure adequate calculation accuracy to optimize the TOF system pre-mass production, even for TOF systems whose sequence of operations and sensor operations are flexibly programmable.Type: GrantFiled: July 30, 2010Date of Patent: September 30, 2014Assignee: Microsoft CorporationInventors: Swati Mehta, Cyrus Bamji
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Publication number: 20140288885Abstract: A signal processing device includes: a first acquisition unit that acquires a first signal indicating a pulse wave of a living body from a first measuring unit that measures the pulse wave; a second acquisition unit that acquires a second signal indicating the pulse wave of the living body from a second measuring unit that measures the pulse wave at different sensitivities from the first measuring unit; an estimation unit that estimates a ratio of sensitivity of the first measuring unit to sensitivity of the second measuring unit from a first spectrum of the first signal and a second spectrum of the second signal; and a subtraction unit that subtracts the second spectrum from the first spectrum so as to cancel noise included in the first spectrum and the second spectrum, using the ratio estimated by the estimation unit.Type: ApplicationFiled: March 14, 2014Publication date: September 25, 2014Applicant: Seiko Epson CorporationInventor: Masanori MORITA
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Patent number: 8843349Abstract: An apparatus being capable of quickly removing noise from a partial discharge signal generated from the electrical power facility such as a gas insulated switchgear (GIS) and the like, and an apparatus for detecting a partial discharge generated section. The apparatus for removing noise from a partial discharge signal comprises a PD signal detection unit configured to detect a PD signal of the power facility and to detect and output peaks of the PD signal in respective preset time intervals, a noise signal detection unit configured to detect a noise signal outside the power facility and to detect and output peaks of the noise signal in the respective preset time intervals, and a noise removal unit configured to eliminate the peaks of the PD signal output in time intervals identical to those in which the peaks of the noise signal detection unit are output.Type: GrantFiled: July 14, 2009Date of Patent: September 23, 2014Assignee: Power System Diagnosis Tech., Inc.Inventors: Chang-Won Kang, Jae-Ok Choi, Yeung-Noh Kim, Chul-Min Hwang, Chul-Kwang Choi
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Patent number: 8843332Abstract: A method and apparatus for carrying out noise reduction in data regarding parameter values including the steps of making a series of measurements of parameter values at times separated by predetermined time intervals, forming a plurality of successive measurements into an array of measurements, performing n successive wavelet transforms on the array of measurements to produce an array of coefficients, comparing the values of the array of coefficients to a threshold value and, selectively changing the values of the coefficients based on their relationship to the threshold, to produce an array of filtered coefficients, and performing n successive inverse wavelet transforms on the array of filtered coefficients to produce an array of filtered measurements.Type: GrantFiled: November 12, 2010Date of Patent: September 23, 2014Assignee: Onzo LimitedInventors: Jose Manuel Sanchez Loureda, Adam Richard Westbrooke, Clarke Brunt
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Patent number: 8834386Abstract: The invention relates to a system for and a method of processing breathing signals. A noise reduction operation is performed on a spectral breathing signal (18) to compute an output spectral signal (38), said noise reduction operation using spectral subtraction; and a two-dimensional frequency and time filtering (32) of a gain function (30) used in the spectral subtraction of the noise reduction operation performing step is performed, for example, a two-dimensional frequency and time median filtering of the gain function. For example, said spectral breathing signal is computed based on a breathing signal.Type: GrantFiled: July 2, 2010Date of Patent: September 16, 2014Assignee: Koninklijke Philips N.V.Inventor: Rene Martinus Maria Derkx
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Patent number: 8824076Abstract: The present invention is related to systems and methods for adaptive parameter modification in a data processing system.Type: GrantFiled: August 28, 2012Date of Patent: September 2, 2014Assignee: LSI CorporationInventors: Lu Pan, Seongwook Jeong, Haitao Xia
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Patent number: 8818763Abstract: Designing a multi-dimensional Finite Impulse Response FIR digital filter to attenuate the coherent noise while preserving reflection signals on seismic data, particular in land seismics, includes computing filter coefficients to minimize an l-norm function of differences between a response of a filter with the computed coefficients and a predetermined response which attenuates signals outside a predetermined range of slowness relative to signals within the predetermined range of slowness. Additional constraints may be imposed on the coefficients to improve the attenuation of signals outside the predetermined range of slowness of the desired reflection signals, and/or to improve uniformity within the desired range.Type: GrantFiled: August 5, 2011Date of Patent: August 26, 2014Assignee: Schlumberger Technology CorporationInventors: Ying Ji, Julian Edward Kragh, Ali Ozbek
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Publication number: 20140222382Abstract: A method and apparatus for removing noise from a bioelectrical signal are provided. A main analog signal from a bioelectrical test probe and a gating signal are received. A main data stream associated with the main analog signal from the bioelectrical test probe is developed. An adaptive noise cancellation (ANC) unit operates to develop an output data stream by removing noise components from the main data stream in accordance with the reference data stream. If the gating signal indicates that the main analog signal was acquired during a period of bioelectrical activity then the ANC unit operates in a fixed mode, and if the gating signal indicates that the main analog signal was acquired during a period without bioelectrical activity then ANC unit operates in an adaptive mode.Type: ApplicationFiled: February 1, 2013Publication date: August 7, 2014Applicant: MOLECULAR DEVICES, LLCInventors: Parag Patel, Michael Youngquist
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Publication number: 20140207418Abstract: A signal processing system implemented on a Field Programmable Gate Array (FPGA) operates according to a low frequency K-Clock to sample Optical Coherence Topography (OCT) signals, as opposed to relying on a high frequency K-Clock to obtain the same information. A resampler is used to resample the OCT signal uniformly in the optical frequency domain. The resampling may be performed by extracting instantaneous phase information from a low-frequency digitized K-Clock signal, unwrapping the extracted phase information, multiplying the unwrapped extracted phase information with an interpolation factor to obtain recalculated phase information, determining one or more integer crossing points corresponding to the recalculated phase information, and interpolating one or more values of the OCT signal based on the one or more integer crossing points. The integer crossing points may represent points in phase divisible by 360 degrees, within the range of points in phase defined by the recalculated phase information.Type: ApplicationFiled: January 24, 2013Publication date: July 24, 2014Applicant: NATIONAL INSTRUMENTS CORPORATIONInventor: Kalyanramu Vemishetty
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Patent number: 8781749Abstract: Noise may be filtered or attenuated from seismic data by building a four-dimensional volume using the acquired seismic data and then applying a random noise attenuation filter to the four-dimensional volume. The dimensions of the four-dimensional volume may include a trace number dimension, a time dimension, a shot number dimension, and a cable number dimension. The random noise attenuation filter may filter portions of the acquired seismic data if the seismic data is not correlated with respect to other seismic data in the four dimensional volume.Type: GrantFiled: December 28, 2007Date of Patent: July 15, 2014Assignee: WesternGeco L.L.C.Inventor: Craig Beasley
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Patent number: 8762109Abstract: Estimating impedance of energy storage devices includes generating input signals at various frequencies with a frequency step factor therebetween. An excitation time record (ETR) is generated to include a summation of the input signals and a deviation matrix of coefficients is generated relative to the excitation time record to determine crosstalk between the input signals. An energy storage device is stimulated with the ETR and simultaneously a response time record (RTR) is captured that is indicative of a response of the energy storage device to the ETR. The deviation matrix is applied to the RTR to determine an in-phase component and a quadrature component of an impedance of the energy storage device at each of the different frequencies with the crosstalk between the input signals substantially removed. This approach enables rapid impedance spectra measurements that can be completed within one period of the lowest frequency or less.Type: GrantFiled: May 3, 2011Date of Patent: June 24, 2014Assignee: Battelle Energy Alliance, LLCInventors: Jon P. Christophersen, John L. Morrison, William H. Morrison, Chester G. Motloch, David M. Rose
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Patent number: 8749489Abstract: An object is to appropriately transmit operation data from a controller device to an information processing device. The controller device is capable of wirelessly communicating with the information processing device. The controller device includes a generating unit, a communication unit, and a display unit. The generating unit generates operation data based on an operation performed on the controller device. The communication unit receives one image's worth of image data from the information processing device with a first frequency, the image data generated in the information processing device through a process performed based on the operation data, and transmits the operation data to the information processing device with a second frequency that is higher than the first frequency. The display unit displays an image based on the image data.Type: GrantFiled: May 25, 2012Date of Patent: June 10, 2014Assignee: Nintendo Co., Ltd.Inventors: Kuniaki Ito, Yasuyuki Shimohata, Jumpei Ueki
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Publication number: 20140118736Abstract: A computer implemented method. The method includes obtaining, using a processor, spectral reflectance data from a spectrophotometric measurement of a target coating on a surface, wherein the measurement was taken at a specular angle, and removing, using the processor, at least a portion of the specular reflectance data that is attributable to a glossy coating of the surface. The method also includes constructing, using the processor, at least one spectral reflectance curve, and identifying, using the processor, at least one type of pigmentation effect of the target coating based at least in part on the at least one spectral reflectance curve.Type: ApplicationFiled: March 15, 2013Publication date: May 1, 2014Applicant: PPG Industries Ohio, Inc.Inventor: Alison M. Norris
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Patent number: 8711249Abstract: An image denoising system and method of implementing the image denoising system is described herein. Noise is decomposed within each channel into frequency bands, and sub-band noise is propagated. Denoising is then able to occur at any node in a camera pipeline after accurately predicting noise that is signal level-dependent, frequency dependent and has inter-channel correlation. A methodology is included for estimating image noise in each color channel at a sensor output based on average image level and camera noise parameters. A scheme is implemented for detecting a peak-white image level for each color channel and predicting image level values for representative colors. Based on a noise model and camera parameters, noise levels are predicted for each color channel for each color patch and these noise levels are propagated to the denoising node. A three dimentional LUT correlates signal level to noise level. Then, a denoising threshold is adaptively controlled.Type: GrantFiled: March 29, 2007Date of Patent: April 29, 2014Assignees: Sony Corporation, Sony Electronics Inc.Inventors: Farhan A. Baqai, Akira Matsui, Kenichi Nishio
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Patent number: 8704186Abstract: A microphonics noise cancellation system and method for improving the energy resolution for mechanically cooled high-purity Germanium (HPGe) detector systems. A classical adaptive noise canceling digital processing system using an adaptive predictor is used in an MCA to attenuate the microphonics noise source making the system more deployable.Type: GrantFiled: November 17, 2010Date of Patent: April 22, 2014Assignee: Lawrence Livermore National Security, LLCInventors: Karl Einar Nelson, Morgan T. Burks
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Publication number: 20140106477Abstract: Disclosed is a method for determining an endpoint of an etch process using optical emission spectroscopy (OES) data as an input. Optical emission spectroscopy (OES) data are acquired by a spectrometer attached to a plasma etch processing tool. The acquired time-evolving spectral data are first filtered and demeaned, and thereafter transformed into transformed spectral data, or trends, using multivariate analysis such as principal components analysis, in which previously calculated principal component weights are used to accomplish the transform. A functional form incorporating multiple trends may be used to more precisely determine the endpoint of an etch process. A method for calculating principal component weights prior to actual etching, based on OES data collected from previous etch processing, is disclosed, which method facilitates rapid calculation of trends and functional forms involving multiple trends, for efficient and accurate in-line determination of etch process endpoint.Type: ApplicationFiled: October 17, 2013Publication date: April 17, 2014Applicant: TOKYO ELECTRON LIMITEDInventors: Yan CHEN, Serguei Komarov, Vi Vuong
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Publication number: 20140100823Abstract: A method and system for spectroscopic measurement of a characteristic of a biological tissue is provided. The method includes the steps of: (1) using at least one light source to emit light that penetrates the biological tissue; (2) using at least one light detector to detect light emitted by the at least one light source and passed through the biological tissue, and to convert the detected light into a detection signal, the detection signal including an unwanted noise component; and (3) using a processor to process the detection signal and to determine an adjusted peak-to-peak amplitude value that is representative of an amplitude of the detection signal adjusted for the unwanted noise component.Type: ApplicationFiled: September 30, 2013Publication date: April 10, 2014Applicant: CAS Medical Systems, Inc.Inventor: William Kosturko
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Publication number: 20140088923Abstract: A system and method for processing data in chromatographic systems is described. In an implementation, the system and method includes processing data generated by a chromatographic system to generate processed data, analyzing the processed data, and preparing and providing results based on the processed data.Type: ApplicationFiled: March 12, 2012Publication date: March 27, 2014Applicant: LECO CorporationInventors: Jihong Wang, Peter Markel Willis
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Patent number: 8676543Abstract: 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: GrantFiled: June 2, 2010Date of Patent: March 18, 2014Assignee: ExxonMobil Research and Engineering CompanyInventors: H. Alan Wolf, Chung-Min Cheng, Dalia G. Yablon, Alan M. Schilowitz, Manuel S. Alvarez, Yvonne Mathez
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Publication number: 20140074436Abstract: A system for reducing noise in a sensor measurement system includes a noise detector for detecting noise in capacitive to digital conversion measurements; a noise correction module operably coupled to the noise detector and configured to dynamically modify one or more delays associated with a sampling waveform; and a noise filter for filtering the sampling waveform.Type: ApplicationFiled: September 12, 2013Publication date: March 13, 2014Inventors: Andrew Voris, Burke Davison
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Patent number: 8671316Abstract: An image processing apparatus of the present disclosure includes: a two-dimensional matrix barcode decoding unit configured to decode a two-dimensional matrix barcode in an image of image data; and a restoration determining unit configured (a) to obtain an error detection rate and error detection position information detected while the two-dimensional matrix barcode is decoded, (b) to compare the error detection rate with a predetermined threshold value, (c) on the basis of the comparison result, to determine whether the two-dimensional matrix barcode should be restored, and (d) to adjust the threshold value according to an error detection position determined from the error detection position information.Type: GrantFiled: April 20, 2012Date of Patent: March 11, 2014Assignee: Kyocera Document Solutions Inc.Inventors: Kunihiko Shimamoto, Yuya Tagami
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Patent number: 8670950Abstract: The invention relates to false echo storage in the area of level measurement. The decision as to whether or not to initialize and/or update the false echo memory is made using at least one value for the sensor-inherent noise, container noise and/or EMC noise for this purpose. This may make it possible to avoid identifying a false echo as the level echo.Type: GrantFiled: November 4, 2010Date of Patent: March 11, 2014Assignee: VEGA Grieshaber KGInventors: Karl Griessbaum, Roland Welle
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Patent number: 8643485Abstract: A method and apparatus for ignoring a duplicated alarm in a communications network are described. In one embodiment, at least one alarm message associated with at least one event is received. A determination of whether the at least one event exists in a database is subsequently made. The at least one event is recorded in the database if the at least one event does not exist in the database. Conversely, the at least one alarm message is suppressed if the at least one event exists in the database.Type: GrantFiled: August 20, 2012Date of Patent: February 4, 2014Assignee: AT&T Intellectual Property II, L.P.Inventors: Daniel Sheleheda, Michael Singer
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Patent number: 8645090Abstract: A system for estimating a baseline of a signal exhibits a signal generator and a processor. The signal generator is configured to generate a signal exhibiting a plurality of peaks and a baseline. The processor is configured to perform operations including determining an estimator indicating at least one region of the signal that exhibits a peak, determining a weight indicating at least one region of the signal that does not exhibit a peak based on the estimator, and estimating the baseline of the signal based on at least the determined weight.Type: GrantFiled: May 14, 2009Date of Patent: February 4, 2014Assignee: Agilent Technologies, Inc.Inventor: Javier E. Satulovsky
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Patent number: 8639388Abstract: A vibration control system includes a mechanical system which generates vibration; a sensor configured to measure the vibration and generate a vibration signal thereof, and a processor configured: (a) receive a vibration signal from a sensor in a mechanical system; (b) model the vibration signal using a time-domain function; (c) adjust one of an amplitude coefficient and a phase coefficient of the modeled vibration signal; (d) output a control signal corresponding to the modeled vibration signal to the mechanical system so as to reduce the vibration; and (e) receive another vibration signal from the sensor. Steps (c)-(e) are repeated when the average value of the vibration signal is greater than a predetermined value. A method for vibration control is also disclosed.Type: GrantFiled: May 25, 2010Date of Patent: January 28, 2014Assignee: Raytheon CompanyInventors: Robert C. Hon, John F. Silny
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Patent number: 8639475Abstract: A system and method of signal detection from a given point, in which a radiative aperture, such as a sonar sensor, radar antenna, acoustic sensor, or the like, receives radiation from the point at more than one range. At each range, the signal incident on each point within the aperture is weighted by the cosine of the angle between a surface normal at the point on the aperture, and a vector from the point on the aperture to the given point. The physical size and shape of the aperture may also be changed to cause the aperture to subtend the same solid angle having the given point as the vertex, at each range. In this manner, the signal from the given point becomes aperture shape independent, facilitating object recognition and imaging.Type: GrantFiled: May 18, 2009Date of Patent: January 28, 2014Assignee: The United States of America as represented by the Secretary of the NavyInventor: Richard Rikoski
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Patent number: 8612178Abstract: A specific emitter identification (SEI) method and apparatus is capable of identifying and tracking objects within a geographical area of interest wherein the system and method has not been preprogrammed to look for particular signals. The system and method receives all of the emitted electromagnetic signals emitted from area of interest. The system and method next performs high order statistical analysis on the received signals and determines which signals emanate from possible targets of interest and which likely emanate from background clutter/noise by comparing the relative degrees of Gaussianness of the signals (for example using entropy measurements). The least Gaussian signals are deemed to likely be signals from potential targets of interest while those which are more Gaussian are deemed to be likely from background clutter or noise.Type: GrantFiled: April 19, 2010Date of Patent: December 17, 2013Assignee: BAE Systems Information and Electronic Systems Integration Inc.Inventor: Webster Dove
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Publication number: 20130332116Abstract: An electron microscope and method of operating an electron microscope (1) has an electron beam source (11) for producing an electron beam, a noise canceling aperture (12) for detecting a part of the beam, an amplifier (42), an effective value calculating circuit (44) for extracting DC components of the output signal from the amplifier (42), a detector (15) for detecting a signal obtained in response to impingement of the beam on a sample (A), a preamplifier circuit (20), an amplifier circuit (30), a dividing circuit (54) for performing a division based on the output signal from the amplifier circuit (30) and on the output signal from the amplifier (42), and a multiplier circuit (58) for performing multiplication of the output signal from the dividing circuit (54) and the output from the effective value calculating circuit (44).Type: ApplicationFiled: June 12, 2013Publication date: December 12, 2013Inventor: Takashi Suzuki
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Patent number: 8606547Abstract: A method and a system for measuring the aerodynamic noise of a vehicle; the system is provided with: a measuring station, which is adapted to receive the vehicle and is provided with a supporting element; at least one blower carried by the supporting element and adapted to generate an air jet towards the vehicle; an actuating device for displacing the supporting element with respect to the vehicle; at least one phonometer for measuring the aerodynamic noise produced by the vehicle struck by the air jet generated by the blower; a position sensor for detecting the position of the supporting element with respect to the vehicle; and a processing unit connected to the phonometer and to the position sensor for correlating the aerodynamic noise measurements supplied by the phonometer with the position of the supporting element with respect to the vehicle.Type: GrantFiled: August 24, 2007Date of Patent: December 10, 2013Assignee: Ferrari S.p.A.Inventor: Gabriele Cavallotti
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Publication number: 20130317783Abstract: Systems and methods for cancelling a near-field noise signal. The methods generally involve: receiving (604), from a first acoustic sensing device (120), a first signal (214) comprising a near-field noise signal (206); synthesizing (320, 420, 520, 606) a replica signal (322, 422, 522) which replicates the near-field noise signal; and communicating (608) the replica signal and the first signal to a far-field noise cancellation process (150). Prior to communicating the replica signal to the far-field noise cancellation process, at least one characteristic of the replica signal is controlled (606) so that the far-field noise cancellation process will identify the near-field noise signal as far-field noise. The far-field noise cancellation process cancels (610) the near-field noise signal and generates (612) an output signal (360, 460, 560) in which the near-field noise signal is reduced in amplitude.Type: ApplicationFiled: May 22, 2012Publication date: November 28, 2013Applicant: HARRIS CORPORATIONInventor: Bryce Tennant
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Publication number: 20130311141Abstract: A signal denoising method for a frequency-scan ion trap mass spectrometer includes reading a signal raw data array observed in the spectrometer. The signal raw data array is processed by Boxcar averaging method to obtain a first signal array. Then the first signal array is processed by a harmonic interference cancellation method to obtain a second data array. Next the second signal array is processed by a radio frequency interference reduction method and a third signal array without the background induced from driving voltage of ion trap is reconstructed according to the second signal array.Type: ApplicationFiled: May 20, 2013Publication date: November 21, 2013Applicant: National Dong Hwa UniversityInventors: Wen-Ping Peng, Szu-Wei Chou, Hsin-Min Shen, Kou-Hwa Chang
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Publication number: 20130262037Abstract: The partial discharge noise separation method uses Independent Component Analysis (ICA) for de-noising partial discharge (PD) test signals having a noise signal component and a partial discharge component. Assuming that the noise signal component and the PD signal component are both statistically independent of each other and non-Gaussian, the ICA algorithm separates the noise component from the PD signal component from two partial discharge test signals acquired from two separate couplers per phase that are connected to the windings of a three-phase rotating machine.Type: ApplicationFiled: April 3, 2012Publication date: October 3, 2013Applicant: KING FAHD UNIVERSITY OF PETROLEUM AND MINERALSInventors: HUSSAIN AL-DUWAISH, ZAKARIYA AL-HAMOUZ, SYED ZEESHAN RIZVI
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Patent number: 8541972Abstract: Disclosed is a method for suppressing a speed ripple occurring during an operation of an AC motor by using a torque compensator based on an activation function. The method includes the steps of calculating a speed error ?err based on a reference speed ?ref and an actual speed ?act; calculating a controller output Trm by using the speed error ?err as an input of a PI control and an operation of a compensated torque Tcom; and determining a torque variation based on the controller output Trm and a reference torque Tref and operating the torque variation in relation to an anti-windup gain Ka to use torque variation as an input of an integral (I) control. The method suppresses the speed ripple by compensating for the torque ripple through a controller which calculates the compensated torque by taking the signs of the speed error and the differential speed error into consideration.Type: GrantFiled: December 8, 2011Date of Patent: September 24, 2013Assignee: Kyungsung University Industry Cooperation FoundationInventors: Dong Hee Lee, Jin Woo Ahn
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Patent number: 8538582Abstract: A robot includes: an arm driven by a motor; an angle sensor that detects a pivoting angle of the motor; an inertia sensor that detects an inertial force acting on the arm; a noise detecting unit that detects a noise frequency of the inertia sensor from both an output of the angle sensor and an output of the inertia sensor; a filter-constant determining unit that determines a characteristic of a filter from information of the noise detecting unit; and the filter that removes noise of the inertia sensor on the basis of the filter-constant determining unit.Type: GrantFiled: January 5, 2012Date of Patent: September 17, 2013Assignee: Seiko Epson CorporationInventor: Shigenori Sasai
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Patent number: 8532987Abstract: A non-acoustic sensor is used to measure a user's speech and then broadcasts an obscuring acoustic signal diminishing the user's vocal acoustic output intensity and/or distorting the voice sounds making them unintelligible to persons nearby. The non-acoustic sensor is positioned proximate or contacting a user's neck or head skin tissue for sensing speech production information.Type: GrantFiled: February 1, 2011Date of Patent: September 10, 2013Assignee: Lawrence Livermore National Security, LLCInventor: John F. Holzrichter
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Patent number: 8532961Abstract: There is provided a method to account for aircraft angle of attack effects in engine noise shielding in aircraft configurations having one or more engines mounted above a wing or a lifting body. The method includes computing a local flow field from a known standard full aircraft configuration oriented at a nonzero angle of attack. The method further includes computing a mean flow field in a test dataset from a small scale aircraft model test configuration oriented at a zero angle of attack. The method further includes matching the local flow field with the mean flow field to identify a selected noise measurement dataset. The method further includes rotating the selected noise measurement dataset in a far field directivity rotation angle to match the nonzero angle of attack, thus resulting in engine noise shielding results for the full aircraft configuration at the nonzero angle of attack.Type: GrantFiled: October 29, 2010Date of Patent: September 10, 2013Assignee: The Boeing CompanyInventor: Yueping Guo
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Patent number: 8530828Abstract: A plurality of scans of a sample are performed, producing a plurality of mass spectra. Neighboring mass spectra of the plurality of mass spectra are combined into a collection of mass spectra based on sample location, time, or mass. A background noise estimate is calculated for the collection of mass spectra. The collection of mass spectra is filtered using the background noise estimate, producing a filtered collection of one or more mass spectra. Quantitative or qualitative analysis is performed using the filtered collection of one or more mass spectra. The background noise estimate is calculated by dividing the collection of mass spectra into two or more windows, for example. For each window of the two or more windows, all spectra within each window are combined, producing a combined spectrum for each of the two or more windows. For each combined spectrum, a background noise is estimated.Type: GrantFiled: April 2, 2012Date of Patent: September 10, 2013Assignee: DH Technologies Development Pte. Ltd.Inventors: Gordana Ivosev, Ronald Bonner
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Patent number: 8531190Abstract: A power-supply noise measuring circuit includes a voltage fluctuation detecting circuit, a unit time generating circuit, a current measuring circuit, and a sampling circuit. The voltage fluctuation detecting circuit generates a detection current in accordance with a voltage fluctuation of a power supply. The unit time generating circuit generates a unit time in accordance with a clock signal. The current measuring circuit treasures an amount of the detection current per unit time. The sampling circuit samples the amount of the detection current measured by the current measuring circuit, every unit time. The present invention provides the power-supply noise measuring circuit that has a small circuit area and enough accuracy.Type: GrantFiled: June 10, 2010Date of Patent: September 10, 2013Assignee: NEC CorporationInventor: Mikihiro Kajita
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Patent number: 8532828Abstract: A system for damping audible noise from a drive train. One embodiment is a system with an audible noise signal from a drive train wherein a damping circuit produces a damping torque that is a phase shifted and amplified version of the noise signal that is applied to the air-gap torque of a generator or motor coupled to the drive train and effectively reduces the audible noise.Type: GrantFiled: November 7, 2008Date of Patent: September 10, 2013Assignee: General Electric CompanyInventors: Simon Schramm, Christof Sihler, Jan Hemmelmann, Robert Roesner
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Patent number: 8527226Abstract: An apparatus for modulating an incident beam includes a body that is non-transmissive and rotatable about an axis perpendicular to a surface of the body. The body has a first set of features including transmissive features with respect to the incident beam along a first radial path at a first radial distance from the axis and a second set of features including data storage features along a second radial path at a second radial distance from the axis. The apparatus also includes a reference sensor disposed over a first position along the second radial path. In the apparatus. the radial distances are different and the numbers of transmissive features and data storage features are relatively prime. When the body is rotating, the first set of features modulate the incident beam and the reference sensor generates a reference signal based on the data storage features traversing the first position.Type: GrantFiled: March 1, 2010Date of Patent: September 3, 2013Assignee: Vanderbilt UniversityInventor: Jesse Shaver
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Patent number: 8510082Abstract: An optical interrogation system is described herein that can interrogate a label-independent-detection (LID) biosensor and monitor a biological event on top of the biosensor without suffering from problematical parasitic reflections and/or problematical pixelation effects. In one embodiment, the optical interrogation system is capable of interrogating a biosensor and using an oversampling/smoothing algorithm to reduce oscillations in the estimated location of an optical resonance caused by the problematical pixelation effect which makes it easier to determine whether or not a biological event occurred on the biosensor.Type: GrantFiled: June 2, 2011Date of Patent: August 13, 2013Assignee: Corning IncorporatedInventors: Jacques Gollier, Garrett A. Piech, Michael B. Webb, Qi Wu
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Patent number: 8494624Abstract: A method and apparatus for reducing noise in brain signal measurements. The method provides an array of sensors providing for spatial oversampling, and multiple samplings over time to produce measurement data. The measurement data have a variance common to the sensors, and a remaining variance that can be safely assumed to be sensor or channel specific noise and that is accounted for by a suitable modification of the measurement data. The apparatus provides clusters of the sensors positioned in correspondence to the vertices of substantially equilateral triangles that are defined by tensile elements connecting the clusters.Type: GrantFiled: June 25, 2010Date of Patent: July 23, 2013Assignee: Electrical Geodesics, Inc.Inventors: Don M. Tucker, Don M. Tucker, Sr.
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Patent number: 8471513Abstract: During rain, including a light source (5) for radiating light such that the light is transmitted through a vehicle window (2), a light receiving element (6) for sensing an optical signal when the light radiated from the light source (5) is reflected from the raindrop fallen on the vehicle window (2) and performing a photoelectric transduction, and a receiver (9) for receiving the photoelectrically transduced signal from the light receiving element (6) and judging the level of rainfall. The light source (5) and the light receiving element (6) are inclined with respect to the surface of the vehicle window (2) such that the light of the light source (5) directly reflected from the vehicle window (2) exits to the outside of the light receiving element (6) and the light reflected from a raindrop (8) on the vehicle window (2) is received by the light receiving element (6) to operate a vehicle wiper.Type: GrantFiled: April 3, 2009Date of Patent: June 25, 2013Inventor: Sea Yeoun Han
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Publication number: 20130124142Abstract: A signal processing method for ascertainment of a measured value is provided, wherein a measurement signal (ADC, ADC?) is filtered by a first filter and a second filter in a first period (S1, S1?) up to reaching a first standstill criterion (SK1, SK1?), wherein the limit frequency of the first filter is higher than the limit frequency of the second filter and/or the order of the first filter is lower than the order of the second filter, wherein after reaching the first standstill criterion (SK1, SK1?) a filter change to a third filter is initiated and after reaching a second standstill criterion (SK2, SK2?) a final measured value is output.Type: ApplicationFiled: May 8, 2012Publication date: May 16, 2013Applicant: MULTIPOND Wagetechnik GmbHInventor: Wolfram Zeck