Specific Mathematical Operation Performed Patents (Class 702/147)
  • Patent number: 10533413
    Abstract: A method for determining a rotational position of a rotor in a fluid pressure pulse generator of a downhole telemetry tool comprises: for at least one rotational position of the rotor, determining an expected pressure of a drilling fluid at the fluid pressure pulse generator that corresponds to the at least one rotational position; forming a rotor position map of rotor rotational positions and corresponding expected drilling fluid pressures from the at least one rotational position of the rotor and the corresponding determined expected pressure; measuring a pressure of the drilling fluid at the fluid pressure pulse generator, and determining the rotational position of the rotor at the measured pressure by associating the measured pressure to an expected pressure and corresponding rotor rotational position in the rotor position map.
    Type: Grant
    Filed: February 9, 2016
    Date of Patent: January 14, 2020
    Assignee: Evolution Engineering Inc.
    Inventors: Justin C. Logan, Aaron W. Logan
  • Patent number: 10434962
    Abstract: A method for detecting a rollover on the basis of a signal of an acceleration sensor in the direction of the vertical axis of the vehicle is described, wherein the time period in which acceleration lies within a specified range is assessed. For this purpose, a counter and a clock generator are provided, wherein the counter is incremented each clock pulse if acceleration lies within a specified range, and the counter is decremented maximally to the value of zero if acceleration lies outside of a specified range. An emergency call may be triggered if a specified counter reading is reached. Additionally, a maximum speed may be specified in the travel direction above which the counter or the triggering is not active.
    Type: Grant
    Filed: December 13, 2017
    Date of Patent: October 8, 2019
    Assignee: Continental Automotive GmbH
    Inventor: Oskar Leirich
  • Patent number: 10401161
    Abstract: The present invention relates to a method for dimensioning a turbomachine comprising a casing and a disc to which at least one blade is secured, said disc being rotationally driven by a shaft about a turbomachine axis (z), comprising: —acquisition (E1) of the coordinates (P) of the ends of the leading edge and of the trailing edge of the blade in a frame of reference connected with the disc; —expression (E2) of the coordinates (P?) of the ends of the leading edge and of the trailing edge of the blade in a frame of reference connected with the casing; —calculation (E3) of the distance (g) between the casing and the ends of the leading edge and trailing edge of the blade from the coordinates (P?) expressed in the frame of reference connected with the casing; —calculation (E4) of the contact pressures between the blade and the casing along the end of the blade from the calculated distance (g); —calculation (E5) of the reaction forces and moments resulting from contact between the blade and the casing from the ca
    Type: Grant
    Filed: June 3, 2015
    Date of Patent: September 3, 2019
    Assignees: SAFRAN AIRCRAFT ENGINES, CENTRE NATIONAL DE LA RECHERCHE SCIENTIFIQUE (CNRS), ECOLE CENTRALE DE LYON, ECOLE NATIONALE D'INGENIEURS DE SAINT ETIENNE
    Inventors: Marie-Oceane Parent, Fabrice Joel Luc Chevillot, Fabrice Hugues Jean Pierre Thouverez
  • Patent number: 10348166
    Abstract: A direct drive servo motor is provided and may include a quadrature encoder and a silicone rubber sleeve affixed to the encoder's shaft that is attached to the rotor hub and may also include an axle fixed to the rotor hub, inner and outer bearings, front and rear bearing plates, an outer stator, and an inner rotor rare earth magnet ring. A computer-controlled camera system is also provided and includes a direct drive camera gimbal; a pan-bar system; a robotic control system; a master interconnect unit; custom control software; and a track and gantry system. A universal camera tripod head adapter is also provided and includes front and rear clamps, a clamp handle, side and rear brackets and a silicone rubber sleeve affixed to the shaft of each encoder that rides on the pan and tilt axis lips of a camera tripod head.
    Type: Grant
    Filed: March 31, 2017
    Date of Patent: July 9, 2019
    Inventor: Steven W. David
  • Patent number: 10306048
    Abstract: A method of controlling noise using an electronic device and the electronic device are provided. The method includes: determining a main work space of a user; determining at least one among a facing direction of the user and a rotating speed of the user; sensing noise around the user; and providing the wearable device with a sound for offsetting the sensed noise based on at least one among the determined main work space, the facing direction of the user, and the rotating speed of the user.
    Type: Grant
    Filed: June 27, 2016
    Date of Patent: May 28, 2019
    Assignee: SAMSUNG ELECTRONICS CO., LTD.
    Inventor: Roman Fraczek
  • Patent number: 10295429
    Abstract: A tire balance measurement device includes a rotation drive portion, an eccentric force measurement unit, a calculation unit, and an evaluation unit. The eccentric force measurement unit measures an eccentric force generated in a main shaft. The calculation unit calculates an eccentric amount of the main shaft based on the eccentric force measured by the eccentric force measurement unit. The evaluation unit evaluates the eccentric amount of the main shaft based on a correlation between the eccentric force measured by the eccentric force measurement unit when the main shaft is rotated at a predetermined rotation speed, and the rotation speed.
    Type: Grant
    Filed: August 24, 2016
    Date of Patent: May 21, 2019
    Assignee: MITSUBISHI HEAVY INDUSTRIES MACHINERY SYSTEMS, LTD.
    Inventors: Tatsuya Ueda, Takumi Tsumura
  • Patent number: 10247555
    Abstract: A round-robin sensing device is disclosed. The round-robin sensing device comprises a MEMS device, wherein the MEMS device includes first and second sense electrodes. The round-robin sensing device also comprises a multiplexer coupled to the first and second sense electrodes, at least one sense amplifier coupled to the multiplexer, a demodulator coupled to the at least one sense amplifier, and an integrate and dump circuit coupled to the demodulator. Finally, the round-robin sensing device comprises an analog-to-digital converter (ADC) coupled to the de-multiplexer, wherein the multiplexer, the at least one sense amplifier and the demodulator provide a continuous time sense path during amplification that is resettable and wherein the integrate and dump circuit and the ADC provide a discrete time processing path.
    Type: Grant
    Filed: July 21, 2016
    Date of Patent: April 2, 2019
    Assignee: InvenSense, Inc.
    Inventors: Derek Shaeffer, Stanley Wang
  • Patent number: 9933260
    Abstract: A mobile electronic equipment includes a gyro sensor that detects an angular velocity, a first housing with the gyro sensor disposed therein, a second housing movably connected to the first housing, an angle formed between the respective housings being changed by movement of the first housing, and a control unit that calculates a change in an angle formed between the first housing and the second housing before and after the movement as a measured angle, based on output data of the gyro sensor. The control unit calculates a correction value for the output data of the gyro sensor based on the measured angle and a reference angle set in advance (see FIG. 1).
    Type: Grant
    Filed: February 17, 2012
    Date of Patent: April 3, 2018
    Assignee: NEC CORPORATION
    Inventor: Satoshi Takano
  • Patent number: 9513307
    Abstract: A device for measuring the speed of movement of a wheeled terrestrial vehicle. A magnetometer takes measurements of an ambient terrestrial magnetic field and is positioned so as to be sensitive to the magnetic field variations caused by the rotation of at least one partially metallic wheel of the vehicle. The magnetometer delivers a corresponding signal. The signal is processed to establish a frequency spectrum thereof. From the frequency spectrum, a frequency of rotation of the wheel is determined, and deducing therefrom, on the basis of information representative of the radius of the wheel, the speed of movement of the vehicle.
    Type: Grant
    Filed: December 8, 2009
    Date of Patent: December 6, 2016
    Assignee: SYSNAV
    Inventor: Alain Vissiere
  • Patent number: 9372200
    Abstract: A rotation speed detecting device is provided. The rotation speed detecting device is electrically connected to a motor of a color wheel, and includes a phase detecting unit and a time calculating unit. The phase detecting unit is suitable for detecting a reference phase point of a rotation information outputted by the motor, and outputting a phase signal according to the reference phase point. The time calculating unit is electrically connected to the phase detecting unit, and calculates a speed information of the motor according to the phase signal. In this way, the rotation speed of the motor of the color wheel is correctly measured.
    Type: Grant
    Filed: February 9, 2012
    Date of Patent: June 21, 2016
    Assignee: Coretronic Corporation
    Inventor: Jui-Ta Liu
  • Patent number: 9309971
    Abstract: A powershift transmission with a dual-clutch main transmission and a downstream planetary gearset. The main transmission includes two partial transmissions and corresponding input shafts and clutches and a common output shaft. The downstream transmission has an input shaft which couples, via a third shifting element, the common output shaft and is fixed to a first planetary gearset element. The downstream transmission has an output shaft that is fixed to a second planetary gearset element. A third planetary gearset element couples a housing by way of a fourth shifting element, to obtain a low driving range of the downstream transmission, or, the downstream transmission output shaft by way of a fifth shifting element to obtain a high driving range of the downstream transmission. The common output shaft can couple, via a sixth shifting element, the third planetary gearset element, which can couple, via the fourth shifting element, the transmission housing.
    Type: Grant
    Filed: March 10, 2015
    Date of Patent: April 12, 2016
    Assignee: ZF Friedrichshafen AG
    Inventor: Johannes Kaltenbach
  • Patent number: 9231512
    Abstract: A method and apparatus to dynamically and adaptively demodulate induction motor instantaneous rotor slot harmonic frequency for line-connected squirrel-cage polyphase induction motors. The instantaneous rotor slot harmonic frequency carries essential information on the instantaneous rotor speed. Based on a correlation between the motor's input power and its rotor slot harmonic frequency, a dynamically varying carrier frequency is computed and used in a rotor slot harmonic frequency detector. The rotor slot harmonic frequency detector is based on a superheterodyne principle. It contains a generalized linear-phase low-pass filter, whose bandwidth is estimated dynamically by a filter bandwidth estimator. The rotor slot harmonic frequency detector also includes a latency compensator, which receives the dynamically varying carrier frequency signal and synchronizes it with the output of a frequency demodulator.
    Type: Grant
    Filed: October 15, 2011
    Date of Patent: January 5, 2016
    Assignee: SCHNEIDER ELECTRIC USA, INC.
    Inventors: Zhi Gao, Larry A. Turner, Benoit Leprettre, Roy S. Colby
  • Patent number: 9213379
    Abstract: A device for processing graphics data may include a plurality of graphics processing units. The device may include a fan to dissipate thermal energy generated during the operation of the plurality of graphics processing units. Each of the plurality of graphics processing units may generate a pulse width modulated signal to control the speed of the fan. The device may include one or more monitoring units configured to monitor a signal controlling the speed of the fan. One or more of the plurality of pulse width modulated signals may be adjusted based on the monitored signal. One or more of the plurality of pulse width modulated signals may be adjusted such that a signal controlling the fan maintains a desired duty cycle.
    Type: Grant
    Filed: October 17, 2013
    Date of Patent: December 15, 2015
    Assignee: NVIDIA CORPORATION
    Inventors: Kevin Wong, Thomas Dewey, Craig Ross, Andrew Bell, John Lam, Gabriele Gorla
  • Patent number: 9182316
    Abstract: A method of predicting a fault in a rolling bearing, the rolling bearing including inner and outer rings and rolling bodies evenly angularly distributed therebetween, the method comprising: processing (in the DSP system 8) a position signal (x(t)) indicative of a relative angular position of the inner ring with respect to the outer rings, and a vibration signal (y(t)) (by the accelerometer 7) indicative of speed-related vibrations in the rolling bearing, such that they correspond to either an angular displacement of the rolling bodies equal to an integer number of angular gaps between adjacent rolling bodies or an integer number of complete rotations of the inner ring with respect to the outer ring; space sampling (in the ND acquisition board 9) the processed vibration signal (y(t)) based on the processed position signal (x(t)); and predicting a fault in the rolling bearing based on the space-sampled vibration signal (y(t)).
    Type: Grant
    Filed: March 5, 2010
    Date of Patent: November 10, 2015
    Assignee: TETRA LAVAL HOLDINGS & FINANCE S.A.
    Inventors: Marco Cocconcelli, Luca Bassi, Davide Borghi, Riccardo Rubini, Cristian Secchi
  • Publication number: 20150073745
    Abstract: An angle detection device includes: first and second rotation measuring instruments; an anomaly detection unit detecting occurrences of anomalies in the first and second rotation measuring instruments; and a switching interpolation unit configured to select a first angle signal and a first angular speed signal and output as a third angle signal and a third angular speed signal when the first rotation measuring instrument is normal, and to perform switching so that a second angle signal and a second angular speed signal are output as the third angle signal and the third angular speed signal while performing interpolation so that the difference between the first angle signal and the second angle signal is reduced stepwise if the second rotation measuring instrument is normal when an anomaly has occurred in the first rotation measuring instrument.
    Type: Application
    Filed: August 29, 2014
    Publication date: March 12, 2015
    Inventors: Hiroo MIZUNO, Akira Shimamura, Takashi Arai
  • Patent number: 8948972
    Abstract: A vehicle controlling method which includes detecting an engagement of a vehicle tire with a rumble strip of a road, and performing first and second vehicle controls. The first vehicle control includes operating a controller to control movement of the vehicle after the vehicle tire has disengaged from the rumble strip to bring the vehicle tire back into engagement with the rumble strip. The second vehicle control includes operating the controller to continue to control movement of the vehicle to maintain the vehicle tire in engagement with the rumble strip after the vehicle tire has been brought back into engagement with the rumble strip.
    Type: Grant
    Filed: March 1, 2013
    Date of Patent: February 3, 2015
    Assignees: Nissan North America, Inc., The University of Michigan
    Inventors: Jiechao Liu, Timothy Gordon, Ronald Heft
  • Publication number: 20150025837
    Abstract: A method of estimating a motor velocity in an electric power steering system that includes a motor is provided. The method generates motor position data by sampling an original motor position signal at an irregular sampling rate. The method estimates a motor velocity by performing a regression analysis on the motor position data.
    Type: Application
    Filed: July 18, 2014
    Publication date: January 22, 2015
    Inventor: Steven J. Collier-Hallman
  • Publication number: 20150012241
    Abstract: Disclosed herein are an adaptive automatic gain control apparatus and method for an inertial sensor. The adaptive automatic gain control apparatus for an inertial sensor, includes: a displacement measuring unit measuring and outputting a driving displacement of the inertial sensor; and a controlling unit driving the inertial sensor using an initial driving signal and then resetting a driving signal while changing a margin value using the driving displacement measured by the displacement measuring unit, thereby driving the inertial sensor.
    Type: Application
    Filed: October 9, 2013
    Publication date: January 8, 2015
    Applicant: SAMSUNG ELECTRO-MECHANICS CO., LTD.
    Inventors: Byoung Won Hwang, Kyung Rin Kim, Chang Hyun Kim
  • Publication number: 20140372071
    Abstract: A method is described for automatically determining a proper threshold for a tachometer signal in order to produce desired tachometer pulses necessary for analysis of machine vibration data. A tachometer signal is low-pass filtered to exclude high frequency noise and a running derivative of the filtered tachometer waveform is taken to create a derivative waveform. Another waveform is created that includes only positive values from the derivative waveform that correspond to positive values in the low-pass filtered tachometer waveform. In general, a tachometer signal has the greatest derivative value (slope) when a tachometer pulse is present. Based on this observation, a threshold value is determined using both the low-pass filtered tachometer waveform and the positive-value derivative waveform along with statistics from both waveforms.
    Type: Application
    Filed: June 5, 2014
    Publication date: December 18, 2014
    Inventor: Stewart V. Bowers, III
  • Patent number: 8849601
    Abstract: A method for self-calibrating, while a vehicle is moving, an accelerometer mounted on a wheel of the vehicle so that its plane of maximum sensitivity is secant with the axis of rotation of the wheel. The average value and on the other hand the amplitude of the signal representative of the acceleration Acc-read delivered by the accelerometer are calculated first, for an established speed of the vehicle, based on measurements performed by the accelerometer during a time window corresponding to the time needed for the wheel to complete n rotations, with n>1, then the values of the gain C1 and of the offset C2 of the accelerometer are determined by resolving the system of two equations with two unknown values: ?2R=C1×(average value of Acc-read)+C2 2 g=C1×(amplitude of Acc-read) with: ? the speed of rotation of the wheel, R the radius of the wheel.
    Type: Grant
    Filed: February 19, 2010
    Date of Patent: September 30, 2014
    Assignee: Continental Automotive France
    Inventor: Youri Vassilieff
  • Patent number: 8845442
    Abstract: A method of determining spin parameters of a spot ball, such as spin axis and rotation velocity of a golf ball. The spin axis is determined solely from the trajectory of the flying ball, and the rotational velocity is determined from a frequency analysis of a signal provided by a radar, which signal comprises spectrum traces positioned equidistantly in frequency, which frequency distance relates to the spin velocity.
    Type: Grant
    Filed: February 28, 2006
    Date of Patent: September 30, 2014
    Assignee: Trackman A/S
    Inventor: Fredrik Tuxen
  • Patent number: 8843345
    Abstract: Described herein are systems and methods that can employ a motion detection algorithm to determine whether a sensor has experienced a motion event or a no motion event. The sensor can be any sensor that can be used to identify and/or characterize motion. Upon receiving a signal from the sensor, moments of the signal can be calculated. Then, the moments can be compared to determine whether the signal is Gaussian. If the signal is a Gaussian signal, the algorithm determines that the signal is due to a no motion event. If the signal is a non-Gaussian signal, the algorithm determines that the signal is due to a motion event.
    Type: Grant
    Filed: June 20, 2011
    Date of Patent: September 23, 2014
    Assignee: Invensense, Inc.
    Inventor: William Kerry Keal
  • Publication number: 20140244113
    Abstract: A method of calculating a motor velocity in an electric power steering system comprises receiving a plurality of motor position signals from a motor position sensor of the electronic power steering system, calculating a plurality of angle difference based on the motor position signals prior to performing any filtering operations on the motor position signals, performing a linear regression analysis on the angle differences to predict an angle difference, and calculating a motor velocity based on the predicted angle difference.
    Type: Application
    Filed: February 21, 2014
    Publication date: August 28, 2014
    Applicant: STEERING SOLUTIONS IP HOLDING CORPORATION
    Inventor: Steven J. Collier-Hallman
  • Patent number: 8786275
    Abstract: A gear position sensor employs a sliding electrical connection between arcuate conductors and flexible wiper arms held on opposite surfaces that rotate relative to each other with the movement of a gear selector shaft. The traces may have multiple segments joined by resistors to provide flexible change in resistance value and resistance range for different applications.
    Type: Grant
    Filed: March 15, 2011
    Date of Patent: July 22, 2014
    Assignee: Illinois Tool Works Inc.
    Inventor: Mario M Orrico
  • Patent number: 8779761
    Abstract: A rotation angle detecting unit includes an IC package having a magnetism detecting element, a sealing body, and leads; and a covering member having a fixing part and a supporting part, which are integrally formed from resin. The element outputs a signal according to change of a magnetic field generated upon rotation of a magnetism generating device attached to a detection object. The sealing body covers the element. The leads are connected to the element, and project from the sealing body. The fixing part is fixed to a supporting body so that the covering member is attached to the supporting body. The supporting part supports the package such that the element can output the signal. The package is press-fitted into the supporting part after its formation, so that the package is supported by the supporting part with a predetermined pressure applied to part of an outer wall of the sealing body.
    Type: Grant
    Filed: September 1, 2011
    Date of Patent: July 15, 2014
    Assignee: Denso Corporation
    Inventors: Satoru Hiramoto, Yoshiyuki Kono, Akitoshi Mizutani, Koichiro Matsumoto
  • Patent number: 8779764
    Abstract: To provide a method which can define the direction and orientation of magnetization of a pinned layer while reducing the number of steps of forming a GMR film. The magnetization direction of the pinned layer is defined in a plurality of directions by forming a plurality of patterns having directivities. Further, when the magneto-resistive effect film is formed, a magnetic field is applied in a direction at an angle set between the angles of the plurality of patterns.
    Type: Grant
    Filed: July 13, 2010
    Date of Patent: July 15, 2014
    Assignee: Hitachi Metals, Ltd.
    Inventors: Kenichi Meguro, Hiroyuki Hoshiya, Keizou Katou, Yasunori Abe
  • Patent number: 8717010
    Abstract: Magnetic position sensors, systems and methods are disclosed. In an embodiment, a position sensing system includes a magnetic field source with a dipole moment in a direction along a z-axis; and a sensor module spaced apart from a center of the dipole moment a distance y0 along a y-axis and spaced apart a distance z0 from a center of the dipole moment along a z-axis, at least one of the magnetic field source or the sensor module configured to move relative to the other along a path in the y=y0 plane, the sensor module configured to determine a relative position of the magnetic field source to the sensor module with respect to the path from a ratio of a gradient dBz/dx to a gradient dBz/dy, where Bz is a magnetic field component associated with the permanent magnet, and where an x-axis, the y-axis and the z-axis are at right angles.
    Type: Grant
    Filed: August 19, 2011
    Date of Patent: May 6, 2014
    Assignee: Infineon Technologies AG
    Inventors: Udo Ausserlechner, Armin Satz, Ferdinand Gastinger
  • Patent number: 8631575
    Abstract: Method of assembling a rotor assembly of a gas turbine engine having a plurality of components. The method comprises in one aspect calculating the bending forces due to the mass distribution along the rotor. In another aspect, an optimization routine iterates different rotor arrangements, comparing the calculated bending moments to determine a set of component positions that minimizes the bending forces.
    Type: Grant
    Filed: December 27, 2007
    Date of Patent: January 21, 2014
    Assignee: Pratt & Whitney Canada Corp.
    Inventor: Cameron Walters
  • Patent number: 8618792
    Abstract: A rotation angle detection device includes: a detection portion that detects detection angle that univocally corresponds to rotation angle of a rotating body which is within a predetermined range, wherein the detection angle linearly increases from a minimum value to a maximum value as the rotation angle increases within a unit range, and the detection angle changes from the maximum value to the minimum value or from the minimum value to the maximum value at a boundary between unit ranges that are adjacent to each other; and a correction portion that corrects the detection angle so that the detection angle detected in the predetermined range has linear characteristics, if the boundary between the unit ranges is contained in the predetermined range.
    Type: Grant
    Filed: September 29, 2009
    Date of Patent: December 31, 2013
    Assignee: Toyota Jidosha Kabushiki Kaisha
    Inventors: Hiroyoshi Kojima, Masashi Mure, Hisashi Nishikawa
  • Patent number: 8589115
    Abstract: A system and a method for estimating a torque and a rotational speed of a motor are disclosed. The system includes a sound receiving device, a feature extraction device, and an artificial neural network module. In the method, at first, a plurality of training data are provided, wherein the training data includes a plurality of history sound feature values of the motor and history torque values or history rotation values corresponding thereto. Thereafter, an artificial neural network stored in the artificial neural network module is trained by the history data to obtain a motor model of the motor. Then, a motor sound signal made by the motor in a working state is received. Thereafter, sound feature values of the motor sound signal are extracted. Thereafter, the rotational speed value and the torque value are computed by the motor model in accordance with the at least one sound feature value.
    Type: Grant
    Filed: March 9, 2011
    Date of Patent: November 19, 2013
    Assignee: National Cheng Kung University
    Inventors: Fei-Bin Hsiao, Chung-Neng Huang
  • Patent number: 8567060
    Abstract: Methods of assembling a rotor assembly of a gas turbine engine having a plurality of components. The method comprises, in one aspect, determining a static unbalance force of each component using the mass and the center of mass location, and determining an optimum assembly arrangement minimizing static unbalance forces. Optimal component stacking positions, among other things, may then be established.
    Type: Grant
    Filed: December 27, 2007
    Date of Patent: October 29, 2013
    Assignee: Pratt & Whitney Canada Corp.
    Inventors: Bruce Calvert, Jiemin Wang, Richard Benoit, Harry Harris, Ronald Robinson
  • Patent number: 8561299
    Abstract: Method of assembling a rotor assembly of a gas turbine engine having a plurality of components. The method comprises in one aspect calculating the bending forces due to the mass distribution along the rotor. In another aspect, an optimization routine iterates different rotor arrangements, comparing the calculated bending moments to determine a set of component positions that minimizes the bending forces. In another aspect, mass corrections are optimized to balance the rotor assembly.
    Type: Grant
    Filed: July 17, 2009
    Date of Patent: October 22, 2013
    Assignee: Pratt & Whitney Canada Corp.
    Inventor: Cameron T. Walters
  • Patent number: 8566056
    Abstract: A system and method for determining rotor speed of an AC induction machine is disclosed. The system is programmed to estimate a rotor speed of the induction machine according to a linear speed estimation algorithm and based on name plate information (NPI) of the induction machine and parameters of the AC induction machine during operation thereof. The rotor speed estimation system is also programmed to estimate a rotor speed of the AC induction machine according to a frequency-domain signal processing algorithm and determine if the rotor speed estimated thereby is valid. If the rotor speed estimated by the frequency-domain signal processing algorithm is valid, then a tuned rotor speed of the AC induction machine is estimated according to the linear speed estimation algorithm and based, in part, on the rotor speed estimated by the frequency-domain signal processing algorithm.
    Type: Grant
    Filed: June 16, 2010
    Date of Patent: October 22, 2013
    Assignee: Eaton Corporation
    Inventors: Bin Lu, Santosh Kumar Sharma, Ting Yan, Steven A. Dimino
  • Patent number: 8504324
    Abstract: A system and method analyze reliability of an electronic device using a computing device. The method generates a component coding rule for components of the electronic device, establishes a BOM table for the electronic device according to the component coding rule, and generates component codes for the components according to the component data. The method further classifies the components into different component types according to the component codes, and calculates a failure rate for each of the components according to a parameter equation, obtains mean time between failures (MTBF) of the electronic device by calculating a sum of the failure rates of all the components. In addition, the method generates a reliability analysis report of the electronic device according to the MTBF of the electronic device. and outputs the reliability analysis report to an output device.
    Type: Grant
    Filed: December 15, 2010
    Date of Patent: August 6, 2013
    Assignee: Hon Hai Precision Industry Co., Ltd.
    Inventor: Szu-Wei Kuo
  • Patent number: 8504321
    Abstract: A method is described for determining information about a rotational speed of a compressor, in particular a turbocharger, by providing a measuring signal, in particular a microwave measuring signal, which is directed at a compressor impeller of the compressor, so that the measuring signal is reflected on revolving blades of the compressor impeller, detecting the measuring signal reflected by one or more blades, and determining the information about the rotational speed as a function of the reflected measuring signal.
    Type: Grant
    Filed: May 18, 2010
    Date of Patent: August 6, 2013
    Assignee: Robert Bosch GmbH
    Inventors: Juergen Seidel, Alex Grossmann, Bernhard Opitz, Dirk Hofmann, Jochen Laubender, Uwe Kassner, Dirk Eichel, Klaus Lerchenmueller, Juergen Wendt
  • Publication number: 20130191067
    Abstract: The present invention relates to systems and methods for reliably detecting motion control of mobile devices executing virtual tour applications. In one embodiment, a computerized mobile device reliably detects angular rotations. The mobile device includes a magnetometer for generating directional values representing the respective angular rotations. The mobile device detects abrupt change(s) in additional directional values relative to the prior directional values, and if an abrupt change in an additional directional value is detected, then an appropriate weight is assigned to the additional data value. In addition to generating directional values, the magnetometer may also generate corresponding magnitude values. The mobile device evaluates the corresponding magnitude values and if an amplitude of a magnitude value is greater than a threshold, then the mobile device decreases a confidence value associated with the corresponding directional value.
    Type: Application
    Filed: January 4, 2013
    Publication date: July 25, 2013
    Applicant: TOURWRIST, INC.
    Inventor: TourWrist, Inc.
  • Patent number: 8489355
    Abstract: A method for determining long-term offset drifts of acceleration sensors in a motor vehicle is provided. In one step, the longitudinal vehicle speed is determined in the vehicle's center of gravity. In another step, the share of the driving dynamics in the longitudinal reference acceleration formula and in the transversal reference acceleration formula is calculated from the longitudinal vehicle speed and the yaw rate. In yet another step, the share of the driving dynamics in the reference acceleration on the vehicle level formula is calculated by converting the driving dynamic reference accelerations formula calculated for the center of gravity to the position formula and the orientation of the sensor formula. In a further step, the long-term offset drift of the sensor is determined from the measured values of the sensor and the share of the measured value in the driving dynamics by means of a situation-dependent averaging process.
    Type: Grant
    Filed: September 8, 2006
    Date of Patent: July 16, 2013
    Assignee: Continental Automotive GmbH
    Inventors: Matthias Kretschmann, Jens Daniel Schlachter, Martin Stratesteffen
  • Publication number: 20130172507
    Abstract: The method for detecting rotary speed includes: a step (I) for deeming the difference between input power (P) and loss power (A) to be a first order approximation value (PM1) of the mechanical output of an induction motor, and for obtaining a first approximation value (N1=NS(1?S1)) (NS is the synchronous speed) of the rotary speed from the functional relationship (PM1=?S1) of the output (PM) and slip (S) known for the induction motor; a step (II) for obtaining loss power (B1) based on the value (N1); and a step (III) for deeming a second order approximation value (PM2) of the motor output to be P?(A+B1), and for obtaining a second order approximation value (N2=NS(1?S2)) of the rotary speed from the functional relationship (PM2=?S2) (? is the motor constant) of the output (PM) and slip (S).
    Type: Application
    Filed: December 12, 2011
    Publication date: July 4, 2013
    Applicant: DIC CORPORATION
    Inventor: Shouei Ebisawa
  • Publication number: 20130073251
    Abstract: When a rotation speed is fluctuated, a fluctuation diagram showing the relationship between a fluctuation amplitude and a fluctuation period of the rotation speed is displayed on a monitor. In addition to a current setting value, a settable range of the fluctuation amplitude and the fluctuation period is displayed on the fluctuation diagram. At least one of an optimal fluctuation period PO based on Equation (1) below and an optimal range P1 of the fluctuation period based on Equation (2) below is also displayed on the fluctuation diagram, wherein T is a rotation period of a rotary shaft, and a, amin, amax are preset coefficients.
    Type: Application
    Filed: April 30, 2012
    Publication date: March 21, 2013
    Applicant: Okuma Corporation
    Inventors: Kohei Nishimura, Kiyoshi Yoshino, Hajimu Ishii
  • Patent number: 8401819
    Abstract: Detection of one or more abnormal situations is performed using various statistical measures, such as a mean, a median, a standard deviation, etc. of one or more process parameters or variable measurements made by statistical process monitoring blocks within a plant. This detection is enhanced in various cases by using specialized data filters and data processing techniques, which are designed to be computationally simple and therefore are able to be applied to data collected at a high sampling rate in a field device having limited processing power. The enhanced data or measurements may be used to provided better or more accurate statistical measures of the data, may be used to trim the data to remove outliers from this data, may be used to fit this data to non-linear functions, or may be use to quickly detect the occurrence of various abnormal situations within specific plant equipment, such as distillation columns and fluid catalytic crackers.
    Type: Grant
    Filed: September 23, 2011
    Date of Patent: March 19, 2013
    Assignee: Fisher-Rosemount Systems, Inc.
    Inventor: Kadir Kavaklioglu
  • Patent number: 8392146
    Abstract: A signal processing circuit for a rotation detector includes a normal-rotation pulse request holding portion, a reverse-rotation pulse request holding portion, a resetting portion, and a waiting time switching portion. When an output of one of a normal-rotation pulse and a reverse-rotation pulse is finished and a waiting time elapses, the resetting portion resets an output request signal of the one of the normal-rotation pulse and the reverse-rotation pulse held by one of the pulse request holding portions. The waiting time switching portion sets the waiting time to a first waiting time when one of the pulse request holding portions holds the output request signal, and the waiting time switching portion sets the waiting time to a second waiting time longer than the first waiting time when both the pulse request holding portions hold the output request signals.
    Type: Grant
    Filed: November 16, 2010
    Date of Patent: March 5, 2013
    Assignee: DENSO CORPORATION
    Inventor: Norihiro Kurumado
  • Publication number: 20130020977
    Abstract: The motor speed detection apparatus detects rotational speed of a motor. The apparatus includes an FG coil (21) and a magnet (22) to be relatively moved with rotation of the motor, the FG coil outputting an alternating-current signal to be sampled by the apparatus, an A/D converter (1) to convert the alternating-current signal into a digital signal, an integrator (2) to perform time integration on the digital signal, a first determiner (3, 9) to determine which one of plural threshold ranges includes an integration value obtained by the integrator, a second determiner (3, 8) to determine whether change of the integration value is increase or decrease, and a logical product calculator (3, 10) to produce a binary signal showing a logical product of determination results of the first and second determiners. The apparatus calculates the rotational speed based on a production cycle of the binary signal.
    Type: Application
    Filed: July 17, 2012
    Publication date: January 24, 2013
    Applicant: CANON PRECISION INC.
    Inventor: Masaya SASAKI
  • Patent number: 8323841
    Abstract: A system and method for controlling the bleed valve in an anode recirculation loop of a fuel cell system. The system uses a model to determine the concentration of hydrogen in the recirculated gas by calculating the volume flow of the recirculated gas through a fuel cell stack, a pressure drop across the anode inlet and outlet of the stack, and the density of the recirculated gas, and using a measured temperature of the recirculated gas and a measured pressure drop across a recirculation pump.
    Type: Grant
    Filed: May 6, 2008
    Date of Patent: December 4, 2012
    Assignee: GM Global Technology Operations LLC
    Inventors: Bernhard Baaser, Volker Formanski
  • Patent number: 8321172
    Abstract: A method for determining at least one air system variable in an air supply system of an internal combustion engine in successive, discrete calculation steps, a differential equation being provided with respect to the air system variable based on measured and/or modeled variables, which describe conditions in the air supply system, a difference equation being formed for the quantization of the differential equation according to an implicit method, and the difference equation being solved in each discrete calculation step, in order to obtain the air system variable.
    Type: Grant
    Filed: November 19, 2009
    Date of Patent: November 27, 2012
    Assignee: Robert Bosch GmbH
    Inventors: Alexandre Wagner, Thomas Bleile, Slobodanka Lux, Christian Fleck
  • Publication number: 20120283967
    Abstract: A state-matrix-independent dynamic process estimation method in real-time for weakly observable measurement nodes without PMU is only dependent on real-time measurement dynamic data of measurement nodes with Phasor Mesurement Unit (PMU) and measurement data of Supervisory Control And Data Acquisition (SCADA) system in electric power system or state estimation data. According to the SCADA measurement data or state estimation data at some continuous moments, the method utilizes recursive least squares solution to find a linear combination relationship between variation of measurement parameter to be estimated of nodes without PMU and variation of corresponding measurement parameter of nodes with PMU. Using the linear combination of relationship, the dynamic process of measurement nodes without PMU is estimated in real-time. The method provides high estimation precision and meets error requirements of engineering application.
    Type: Application
    Filed: December 9, 2009
    Publication date: November 8, 2012
    Applicants: BEIJING SIFANG ENGINEERING CO., LTD., BEIJING SIFANG AUTOMATION CO., LTD.
    Inventors: Gang Duan, Jingtao Wu, Xiaoyan Sun, Dong Yang
  • Patent number: 8234091
    Abstract: A measuring unit obtains measurement data of an object measured on the basis of a signal from a GPS satellite and angular velocity of an object output from an angular velocity sensor. An offset value computing unit estimates a running condition of the object on the basis of the measurement data and the angular velocity. The offset value computing unit sequentially derives temporary offset values while changing combination of the measurement data and the angular velocity in accordance with the estimated running condition of the object and, after that, executes statistical process on the temporary offset values, thereby deriving an offset value. An angular velocity conversion coefficient computing unit sequentially derives temporary angular velocity conversion coefficients on the basis of the measurement data and the angular velocity and, after that, executes statistical process on the temporary angular velocity conversion coefficients, thereby deriving an angular velocity conversion coefficient.
    Type: Grant
    Filed: October 26, 2009
    Date of Patent: July 31, 2012
    Assignee: JVC KENWOOD Corporation
    Inventor: Takahiro Kondoh
  • Patent number: 8229697
    Abstract: A method and a device are described for determining the rotational direction and/or rotational speed of a rotatable body on the basis of a sine signal and cosine signal, which is assignable to the rotational direction and/or rotational speed of the rotatable body and are output by a sensor, having at least one of the following steps: recording a sine signal and cosine signal, which is assignable to the rotational direction and/or rotational speed, at a point in time; determining a phase value from the sine signal and cosine signal; recording sine signals and cosine signals, which is assignable to the rotational direction and/or rotational speed, at points in time; determining phase values from the corresponding sine signals and cosine signals; calculating phase differences from the phase values and the phase value; and determining the rotational direction and/or rotational speed from the phase differences on the basis of a Vernier method.
    Type: Grant
    Filed: September 19, 2008
    Date of Patent: July 24, 2012
    Assignee: Robert Bosch GmbH
    Inventor: Axel Wenzler
  • Patent number: 8195426
    Abstract: Data analysis systems and related methods. An implementation of a method of determining a relationship between a variable of interest and one or more process variables represented by a corresponding plurality of tags may include accessing a data historian including historical data including a variable of interest and a plurality of tags. The method may include defining a plurality of bins, retrieving historical data corresponding with the plurality of bins using the data historian, filtering the historical data for each of the plurality of bins using one or more filters to produce filtered historical data, generating an output display using the filtered historical data for the variable of interest and each of the plurality of tags, and determining which of the plurality of tags correlate with the variable of interest using the output display. The output display may include an overlay CUSUM chart and a correlation plot.
    Type: Grant
    Filed: October 21, 2008
    Date of Patent: June 5, 2012
    Inventor: John Antanies
  • Patent number: 8169214
    Abstract: An angular position sensor and method that relies on a stationary circular array of Hall sensors and a rotatable circular array of magnets arranged about a common axis. A periodic and simultaneous reading of all of the Hall sensor outputs is used to determine angular velocity.
    Type: Grant
    Filed: June 6, 2008
    Date of Patent: May 1, 2012
    Assignee: Hydro-Aire, Inc.
    Inventor: Mark Zak
  • Patent number: 8129056
    Abstract: A system and method for controlling the speed of a recirculation pump in an anode recirculation loop of a fuel cell system based on a predetermined ratio of fresh hydrogen to recirculated anode gas. The system uses a model to determine the volume flow of the recirculated gas through a fuel cell stack to determine the recirculation rate based on a measured temperature of the recirculated gas, a measured pressure drop across a recirculation pump, a pressure drop across the anode inlet and outlet of the stack, a percentage of hydrogen in the recirculated gas, and the density of the recirculated gas.
    Type: Grant
    Filed: May 6, 2008
    Date of Patent: March 6, 2012
    Assignee: GM Global Technology Operations LLC
    Inventors: Bernhard Baaser, Volker Formanski