Speed Patents (Class 702/96)
  • Patent number: 11036238
    Abstract: This provides methods and systems for the global navigation satellite system (GNSS) combined with the dead-reckoning (DR) technique, which is expected to provide a vehicle positioning solution, but it may contain an unacceptable amount of error due to multiple causes, e.g., atmospheric effects, clock timing, and multipath effect. Particularly, the multipath effect is a major issue in the urban canyons. This invention overcomes these and other issues in the DR solution by a geofencing framework based on road geometry information and multiple supplemental kinematic filters. It guarantees a road-level accuracy and enables certain V2X applications which does not require sub-meter accuracy, e.g., signal phase timing, intersection movement assist, curve speed warning, reduced speed zone warning, and red-light violation warning. Automated vehicle is another use case. This is used for autonomous cars and vehicle safety, shown with various examples/variations.
    Type: Grant
    Filed: January 24, 2018
    Date of Patent: June 15, 2021
    Assignee: Harman International Industries, Incorporated
    Inventors: Kazutoshi Nobukawa, Faroog Ibrahim
  • Patent number: 11030831
    Abstract: A fuel efficiency estimation system includes: a velocity profile calculation unit to calculate a velocity profile indicating a change in velocity of a motor vehicle traveling a traveling route; a velocity disturbance calculation unit to calculate, based on disturbance information indicating a disturbance event occurring on the traveling route and traveling history information collected from the motor vehicle traveling the traveling route, an attenuation factor, which is a ratio of attenuation of the velocity of the motor vehicle traveling the traveling route, as a velocity disturbance correction coefficient; and a fuel efficiency calculation unit to calculate fuel efficiency of the motor vehicle traveling the traveling route by using the velocity profile and the velocity disturbance correction coefficient.
    Type: Grant
    Filed: September 29, 2016
    Date of Patent: June 8, 2021
    Assignee: MITSUBISHI ELECTRIC CORPORATION
    Inventors: Tomoharu Takeuchi, Norimitsu Nagashima, Takeshi Takeuchi
  • Patent number: 10955244
    Abstract: A driving circuit for a microelectromechanical system (MEMS) gyroscope operating based on the Coriolis effect is provided. The driving circuit supplies drive signals to a mobile mass of the MEMS gyroscope to cause a driving movement of the mobile mass to oscillate at an oscillation frequency. The driving circuit includes an input stage, which receives at least one electrical quantity representing the driving movement and generates a drive signal based on the electrical quantity; a measurement stage, which measures an oscillation amplitude of the driving movement based on the drive signal; and a control stage, which generates the drive signals based on a feedback control of the oscillation amplitude. The measurement stage performs a measurement of a time interval during which the drive signal has a given relationship with an amplitude threshold, and measures the oscillation amplitude as a function of the time interval.
    Type: Grant
    Filed: September 6, 2018
    Date of Patent: March 23, 2021
    Assignee: STMicroelectronics S.r.l.
    Inventor: Stefano Facchinetti
  • Patent number: 10781918
    Abstract: A shift range control device includes an angle calculation unit, a target angle setting unit, a learning unit and a drive control unit. The learning unit learns a correction value to be used in calculating a motor angle target value based on a motor angle and an output shaft signal. The learning unit learns the correction value based on at least a first change point value, which is the motor angle at a timing at which the output shaft signal changes when a rotation member rotates in a first direction from a state in which an engagement member is in the center of valley section, and/or a second change point value, which is the motor angle at a timing at which the output shaft signal changes when the rotation member rotates in a second direction from a state in which the engagement member is in the center of the valley section.
    Type: Grant
    Filed: May 9, 2019
    Date of Patent: September 22, 2020
    Assignee: DENSO CORPORATION
    Inventor: Shigeru Kamio
  • Patent number: 10746757
    Abstract: A wheel speed estimation device is to be applied to a four-wheel drive vehicle including a first coupling device for a rear left-wheel axle and a second coupling device for a rear right-wheel axle. These coupling devices respectively change states of engagement of a left engagement state and a right engagement state to the any one of a completely restraint state, a release state, and an incompletely restraint state. The wheel speed estimation device includes a correction parameter calculator that calculates correction parameters affected by a difference in wheel radius between wheels based on all wheel rotation speed signals, and a wheel speed calculator that calculates wheel speeds based on the wheel rotation speed signals and the correction parameters. Further, the correction parameter calculator stops calculation of the correction parameters when at least one of the left engagement state or the right engagement state is the incompletely restraint state.
    Type: Grant
    Filed: October 29, 2018
    Date of Patent: August 18, 2020
    Assignee: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventor: Ryochi Watanabe
  • Patent number: 10746565
    Abstract: A method includes receiving a signal from a sensor. The signal includes a first in-phase component and a first quadrature component. The first in-phase and quadrature components are identified. A rate signal is applied to the sensor and the sensor generates a sensed rate signal. A second in-phase and quadrature components associated with the sensed rate signal are determined. A phase error based on the first and the second in-phase components, and the first and the second quadrature components is determined. The method may further include reducing error in measurements associated with the sensor by dynamically compensating for the determined phase error, e.g., by modifying a clock signal, by changing a demodulation phase of a demodulator used to identify the in-phase and the quadrature components.
    Type: Grant
    Filed: March 29, 2019
    Date of Patent: August 18, 2020
    Assignee: InvenSense, Inc.
    Inventors: Doruk Senkal, Joseph Seeger
  • Patent number: 10659250
    Abstract: A method is disclosed for managing an internet connection and informing a user about connectivity to the internet of a user terminal via a gateway, the gateway being connected to the user terminal via a local area network and to an internet service provider via a broadband line. The method includes: remotely provisioning through the first communication link the configuration of the gateway for internet connection; detecting completion of configuration of the gateway for internet connection in accordance with a service subscribed by the user, determining the state of the broadband line; and providing the user with a visual indication of availability of connectivity to the internet when configuration of the gateway for internet connection is completed and the broadband line is active; and managing the activation and deactivation of the connection to the internet by user terminals connected to a gateway via the local area network.
    Type: Grant
    Filed: December 30, 2005
    Date of Patent: May 19, 2020
    Assignee: Telecom Italia S.p.A.
    Inventors: Enzo Corda, Maria Moscatelli, Marco Polano
  • Patent number: 10604880
    Abstract: A washing machine appliance, including methods of operation, is provided herein. The washing machine appliance may include a cabinet, a tub, and a rotation element mounted therein. The method may include flowing a volume of liquid into the tub; rotating the rotation element within the tub; measuring an angular position of the cabinet relative to a fixed axis after the flowing; comparing the measured angular position of the cabinet to a predetermined threshold; and adjusting a voltage within the washing machine appliance in response to the measured angular position exceeding the predetermined threshold.
    Type: Grant
    Filed: September 8, 2017
    Date of Patent: March 31, 2020
    Assignee: Haier US Appliance Solutions, Inc.
    Inventor: Michael Wuttikorn Ekbundit
  • Patent number: 10511538
    Abstract: Described techniques enable resource accounting and tracking in high access rate systems using low cost memories. A first set of counters is maintained in relatively lower cost memory. The first counters generally indicate the amount of resources used for each object in a set of objects, but on a potentially delayed basis. A second set of counters of smaller size is stored in a relatively higher cost memory that supports high arrival and departure rates for accurate accounting. Each second counter indicates the amount of resources assigned (or unassigned) to an object since the object's first counter was last updated, and is incremented or decremented whenever this amount changes. A background process is configured to update individual first counters from the corresponding second counters on a recurring basis. The exact times at which a given first counter is updated may vary in accordance with a variety of approaches.
    Type: Grant
    Filed: February 22, 2018
    Date of Patent: December 17, 2019
    Assignee: Innovium, Inc.
    Inventors: William Brad Matthews, Puneet Agarwal
  • Patent number: 10429185
    Abstract: A method and system are provided for determining a heading angle of a user of a portable electronic device in an indoor environment. In an embodiment, the device collects rotational movement information indicative of rotational movement of the device and determines a first heading angle of the device. The first heading angle is determined by using the downward direction of the device to determine the vertical angular rate in the horizontal plane, and integrating the vertical angular rate to form the first heading angle. The device collects first direction information from a first direction sensor and second direction information from a second direction sensor and uses it determine which of the first and second direction information is an outlier, e.g., inaccurate due to an occurrence of a disturbance. The device then corrects the heading angle by comparing the heading angle to the first and second direction information.
    Type: Grant
    Filed: March 11, 2016
    Date of Patent: October 1, 2019
    Assignee: SENIONLAB AB
    Inventors: David Tornqvist, Fredrik Gustafsson, Per Skoglar
  • Patent number: 10429514
    Abstract: Disclosed herein are example embodiments for unoccupied flying vehicle (UFV) location assurance. For certain example embodiments, at least one machine, such as a UFV, may: (i) obtain one or more satellite positioning system (SPS) coordinates corresponding to at least an apparent location of at least one UFV; or (ii) perform at least one analysis that uses at least one or more SPS coordinates and at least one assurance token. However, claimed subject matter is not limited to any particular described embodiments, implementations, examples, or so forth.
    Type: Grant
    Filed: October 11, 2017
    Date of Patent: October 1, 2019
    Assignee: Elwha LLC
    Inventors: Royce A. Levien, Robert W. Lord, Richard T. Lord, Mark A. Malamud, John D. Rinaldo, Jr., Lowell L. Wood, Jr.
  • Patent number: 10359445
    Abstract: An electronic device comprising: a sensor; a communication unit; and at least one processor configured to: receive a first speed measurement from the sensor; receive, via the communication unit, speed information transmitted by an external device; calculate at least one correction parameter based on the first speed measurement and the speed information; and adjust a second speed measurement that is received from the sensor based on the correction parameter.
    Type: Grant
    Filed: October 6, 2015
    Date of Patent: July 23, 2019
    Assignee: Samsung Electronics Co., Ltd.
    Inventor: Yong-Seok Lee
  • Patent number: 10359296
    Abstract: An activity tracking device, such as a step-counting device includes an interface configured to receive one or more acceleration signals and signal processing circuitry. The signal processing circuitry generates an indication of condition of an accelerometer, such as a body position of the accelerometer, based on one or more accelerometer signals, generates an event signal, such as an event flag, based on one or more accelerometer signals and the indication of the condition of the accelerometer, and generates an activity signal, such as step flag based on the event signal, the indication of the condition of the accelerometer and one or more acceleration signals. The signal processing circuitry may generate a noise signal based on one or more acceleration signals and generate the activity signal based on the noise signal.
    Type: Grant
    Filed: October 6, 2016
    Date of Patent: July 23, 2019
    Assignee: STMICROELECTRONICS S.R.L.
    Inventors: Stefano Paolo Rivolta, Andrea Labombarda, Alberto Zancanato
  • Patent number: 10324108
    Abstract: A hand-held processor system for processing data from an integrated MEMS device disposed within a hand-held computer system and method. A dynamic offset correction (DOC) process computes 3-axis accelerometer biases without needing to know the orientation of the device. Arbitrary output biases can be corrected to ensure consistent performance A system of linear equations is formed using basic observations of gravity measurements by an acceleration measuring device, conditioned upon constraints in data quality, degree of sensed motion, duration, and time separation. This system of equations is modified and solved when appropriate geometric diversity conditions are met.
    Type: Grant
    Filed: February 5, 2013
    Date of Patent: June 18, 2019
    Assignee: mCube, Inc.
    Inventors: Sanjay Bhandari, Joe Kelly
  • Patent number: 10292648
    Abstract: Athletic activity may be tracked and monitored while providing encouragement and maintaining an individual's interest in continuing to perform athletic activity. For example, energy expenditure values and energy expenditure intensity values may be calculated based on the duration and type of activity performed by an individual. These values and other movement data may be displayed on an interface in a manner to motivate the individual and maintain the individual's interest. Other individuals (e.g., friends) may also be displayed on an interface through which a user's progress is tracked. This may allow the user to also view the other individuals' progress toward completing an activity goal and/or challenge.
    Type: Grant
    Filed: August 21, 2014
    Date of Patent: May 21, 2019
    Assignee: NIKE, Inc.
    Inventors: Christina S. Self, Kristen L. White
  • Patent number: 10267650
    Abstract: A method includes receiving a signal from a sensor. The signal includes a first in-phase component and a first quadrature component. The first in-phase and quadrature components are identified. A rate signal is applied to the sensor and the sensor generates a sensed rate signal. A second in-phase and quadrature components associated with the sensed rate signal are determined. A phase error based on the first and the second in-phase components, and the first and the second quadrature components is determined. The method may further include reducing error in measurements associated with the sensor by dynamically compensating for the determined phase error, e.g., by modifying a clock signal, by changing a demodulation phase of a demodulator used to identify the in-phase and the quadrature components.
    Type: Grant
    Filed: June 3, 2016
    Date of Patent: April 23, 2019
    Assignee: InvenSense, Inc.
    Inventors: Doruk Senkal, Joseph Seeger
  • Patent number: 10188347
    Abstract: Athletic activity may be tracked and monitored while providing encouragement and maintaining an individual's interest in continuing to perform athletic activity. For example, energy expenditure values and energy expenditure intensity values may be calculated based on the duration and type of activity performed by an individual. These values and other movement data may be displayed on an interface in a manner to motivate the individual and maintain the individual's interest. Other individuals (e.g., friends) may also be displayed on an interface through which a user's progress is tracked. This may allow the user to also view the other individuals' progress toward completing an activity goal and/or challenge.
    Type: Grant
    Filed: August 21, 2014
    Date of Patent: January 29, 2019
    Assignee: NIKE, Inc.
    Inventors: Christina S. Self, Kristen L. White
  • Patent number: 10162362
    Abstract: The described positional awareness techniques employing visual-inertial sensory data gathering and analysis hardware with reference to specific example implementations implement improvements in the use of sensors, techniques and hardware design that can enable specific embodiments to provide positional awareness to machines with improved speed and accuracy.
    Type: Grant
    Filed: July 24, 2017
    Date of Patent: December 25, 2018
    Assignee: PerceptIn, Inc.
    Inventors: Grace Tsai, Zhe Zhang, Shaoshan Liu
  • Patent number: 10132647
    Abstract: The present disclosure describes systems and methods for maintaining gyroscopic sensor accuracy over time and across changing environmental conditions. In certain aspects, the present disclosure provides arrangements and methods for calibrating a gyroscope while it is positioned on a robotic platform. In particular, the gyroscope may positioned on a sensor platform that is moved through a series of known or measured rotations and then the gyroscope signals are compared to reference data and the sensor's gain and offset calculated. In other aspects, the present disclosure provides arrangements and methods for utilizing measurements from multiple gyroscopes that measure the same axis of rotation.
    Type: Grant
    Filed: October 24, 2014
    Date of Patent: November 20, 2018
    Assignee: MTD Products Inc
    Inventor: Edward John Blanchard
  • Patent number: 10041798
    Abstract: Systems, apparatus and methods to supplement, combine, replace, verify and calibrate in-vehicle and in-device sensors and GNSS systems are presented. A mobile device and a vehicle navigation system share sensor and GNSS information to arrive at an improved navigation solution. For example, a navigation solution computed by a vehicle may rely on a sensor signal from a mobile device. Similarly, a navigation solution computed by a mobile device may use a sensor signal or a GNSS signal from a vehicle.
    Type: Grant
    Filed: November 14, 2013
    Date of Patent: August 7, 2018
    Inventor: Wyatt Thomas Riley
  • Patent number: 10032276
    Abstract: The described positional awareness techniques employing visual-inertial sensory data gathering and analysis hardware with reference to specific example implementations implement improvements in the use of sensors, techniques and hardware design that can enable specific embodiments to provide positional awareness to machines with improved speed and accuracy.
    Type: Grant
    Filed: August 29, 2016
    Date of Patent: July 24, 2018
    Assignee: PerceptIn, Inc.
    Inventors: Shaoshan Liu, Zhe Zhang, Grace Tsai
  • Patent number: 9994220
    Abstract: A target vehicle speed generating device basically includes a determination unit and a correction unit. The determination unit determines whether or not a sudden change point is present in the target vehicle speed contained in the corrects the target vehicle speed so as to eliminate the sudden change point upon determining that the sudden change point is present by the determination unit. The sudden change point corresponds to a point at which acceleration changes in excess of a predetermined condition.
    Type: Grant
    Filed: June 30, 2015
    Date of Patent: June 12, 2018
    Assignee: Nissan Motor Co., Ltd.
    Inventor: Yasuhiro Suzuki
  • Patent number: 9873018
    Abstract: A method implementing an accelerometer for analyzing biomechanical parameters of a runner's stride. The method includes fastening a device (1) on the runner that has a triaxial accelerometer (17), a chronograph (16), a digital processor (19) and a display (11). The method measures a sequence of acceleration data in at least the vertical direction using the accelerometer, while the runner runs a certain distance (D) along a running course. During or at the end the running course, the processor calculates the biomechanical parameters of the stride, including lowering the center of gravity and/or the elevation (E) of the center of gravity and/or the sum of the lowering and of the elevation (E) and/or the vertical mechanical work of the center of gravity, based on the acceleration data, of the distance (D) and a period of time measured by the chronograph (16); and displays the parameters.
    Type: Grant
    Filed: April 4, 2016
    Date of Patent: January 23, 2018
    Assignee: Myotest SA
    Inventors: Patrick Flaction, Jacques Quievre, Jean-Benoit Morin
  • Patent number: 9678102
    Abstract: A method is provided for calibrating an inertial sensing unit of a device utilizing a vision sensing unit integral to the device. The method includes receiving inertial sensing input data from the inertial sensing unit, receiving vision sensing input data from the vision unit, and determining when the received vision sensing input data represents a predetermined input state of the vision sensing unit. The method includes estimating an error value in the inertial sensing input data received from the inertial sensing unit based on the received vision sensing input data upon determination that the received vision sensing input data represents the predetermined vision sensing input state. The method further includes adjusting first subsequent received inertial sensing input data from the inertial sensing unit based on the estimated error value, thereby calibrating the inertial sensing unit.
    Type: Grant
    Filed: June 24, 2016
    Date of Patent: June 13, 2017
    Assignee: Google Inc.
    Inventors: Harvey Ho, Charles Campbell Rhodes
  • Patent number: 9618113
    Abstract: A SBW-ECU switches over a shift range to a selected range by rotationally driving a motor to a target position corresponding to the selected range. When a direction of rotation of the motor is the same as a direction toward the target position and a difference between the target position and a present position is larger than a threshold value in a case that the selected range is changed during rotational driving of the motor, the target position is updated to a post-change target position. When the direction of rotation of the motor is opposite to the direction toward the target position or the difference between the target position and the present position is smaller than the threshold value in the case that the selected range is changed during rotational driving of the motor, the target position is updated to the post-change target position after completing the switchover to the pre-change selected range.
    Type: Grant
    Filed: November 18, 2014
    Date of Patent: April 11, 2017
    Assignee: DENSO CORPORATION
    Inventor: Kazuhiro Yoshida
  • Patent number: 9500669
    Abstract: A system (40) for calibrating an inertial sensor (20) includes a power source (42), a frequency measurement subsystem (44, 48), and a gain determination subsystem (52). A calibration process (110) using the system (40) entails applying (116) a bias voltage (66) to the inertial sensor (20), measuring (114) a drive resonant frequency (46), and measuring (118) a sense resonant frequency (50) of the inertial sensor (20) produced in response to the bias voltage (66). A gain value (32) is determined (124) for calibrating (144) the inertial sensor (20) using a relationship (140) between the sense resonant frequency (50) and the bias voltage (66) without imposing an inertial stimulus on the inertial sensor (20).
    Type: Grant
    Filed: January 15, 2014
    Date of Patent: November 22, 2016
    Assignee: Freescale Semiconductor, Inc.
    Inventors: Margaret L. Kniffin, Andrew C. McNeil
  • Patent number: 9504133
    Abstract: A controller for controlling a plurality of lighting devices configured for wireless communications in a facility includes a data communications interface communicating with at least one of the devices. The controller further includes a control module configured to provide a control signal to the data communications interface for communicating to a transceiver associated with the device and for turning off the device according to an algorithm wherein the control signal is provided based on a time of day and/or a sensed condition relating to use of the facility. The transceiver reports device data to the control module to quantify a reduction in power obtained by controlling the devices according to the algorithm.
    Type: Grant
    Filed: October 10, 2012
    Date of Patent: November 22, 2016
    Assignee: Orion Energy Systems, Inc.
    Inventors: Neal R. Verfuerth, Michael J. Potts, Jun Wang, Anthony J. Bartol
  • Patent number: 9441966
    Abstract: A measuring device includes a pair of sensors, an actuator, a noise extraction unit and a low frequency noise (LFN) estimator. The sensors each generate with sample time Ts a sense signal indicating a value of a component of a vectorial physical quantity. The sensors have an Allan variance curve with a minimum value for a first integration time T1. The curve has a first and second tangent line being tangent at integration time 0, and integration time T1 respectively. The tangent lines intersect each other at an intersection point for a second integration time T2. The estimator having an effective integration time Teff determined by, Ts, T1 and T2, generates an estimated noise signal indicative for the estimated value of the noise component from the difference signal and from information about the relative rotation between the sensors.
    Type: Grant
    Filed: February 23, 2012
    Date of Patent: September 13, 2016
    Assignee: Nederlandse Organisatie Voor Toegepast-Natuurwetenschappelijk Onderzoek TNO
    Inventor: Marcel Gregorius Anthonius Ruizenaar
  • Patent number: 9250086
    Abstract: A method and system for determining an alignment error between sensors mounted to a machine is disclosed. The method may include calculating a first orientation value based on a signal received from a first sensor. The method may further include calculating a second orientation value based on a signal received from a second sensor. The method may further include calculating an alignment error between the first sensor and the second sensor based on a difference between the first orientation value and the second orientation value.
    Type: Grant
    Filed: August 22, 2014
    Date of Patent: February 2, 2016
    Assignee: Caterpillar Inc.
    Inventors: Paul Russell Friend, Frank Arthur Willis, Troy Kenneth Becicka
  • Publication number: 20150142362
    Abstract: A gyroscopic rotational monitoring system may be utilized for monitoring one or more properties of rotatable container or vessel, and/or one or more properties of a displaceable material contained in the rotatable vessels. An exemplary aspect relates to the use of a gyroscope and periodicity sensor (e.g., accelerometer) to determine rotational speed of a concrete mixing drum, so that the slump or other property of the concrete can be monitored or adjusted such as by dosing with water, chemical admixtures, or mixture thereof.
    Type: Application
    Filed: November 14, 2014
    Publication date: May 21, 2015
    Inventors: Richard K. Jordan, Yan Glina, Mark F. Roberts, Eric P. Koehler
  • Publication number: 20150127285
    Abstract: A learning processing unit derives, using learning data in which a characteristic value based on a distribution coordinate of a detected acceleration by an acceleration sensor which configured to be worn on a body of a user is associated with a moving speed of the user, a moving speed relational expression for finding an estimated speed from the characteristic value. A moving speed estimation unit finds an estimated speed from a current characteristic value using the derived moving speed relational expression.
    Type: Application
    Filed: October 30, 2014
    Publication date: May 7, 2015
    Inventors: Tsubasa SHIRAI, Fumikazu SANO, Akifumi HAYASHI, Kazuhiko TSUCHIMOTO, Ryota HIRAKAWA, Hidekazu MAEZAWA
  • Patent number: 9020776
    Abstract: An inclination angle compensation system for determining an inclination angle of a machine is disclosed. The inclination angle compensation system may have a non-gravitational acceleration estimator configured to estimate a non-gravitational acceleration of a machine based on an estimated inclination angle and an acceleration output from a forward acceleration sensor. The inclination angle compensation system may also have an inclination angle sensor corrector configured to receive an inclination angle output from an inclination angle sensor, determine an inclination angle sensor acceleration based on the inclination angle output, and calculate a corrected inclination angle of the machine based on the non-gravitational acceleration and the inclination angle sensor acceleration.
    Type: Grant
    Filed: September 28, 2011
    Date of Patent: April 28, 2015
    Assignee: Caterpillar Inc.
    Inventor: Paul Russell Friend
  • Patent number: 9014829
    Abstract: Embodiments of the present invention include an occupancy sensing unit configured to monitor an environment illuminated by a lighting fixture. An inventive occupancy sensing unit may include an occupancy sensor to detect radiation indicative of at least one occupancy event in the environment illuminated by the lighting fixture according to sensing parameters. The occupancy sensor can be coupled to a memory that logs sensor data, which represent the occupancy events, provided by the occupancy sensor. A processor coupled to the memory performs an analysis of the sensor data logged in the memory and adjusts the sensing parameters of the occupancy sensor based on the analysis.
    Type: Grant
    Filed: November 4, 2011
    Date of Patent: April 21, 2015
    Assignee: Digital Lumens, Inc.
    Inventors: Brian Chemel, Colin N. Piepgras, Frederick Morgan
  • Publication number: 20150057959
    Abstract: A circuit for processing signals from a gyroscope includes a first that generates an in-phase demodulated signal and a second demodulator that generates a quadrature-phase demodulated signal with reference to in-phase and quadrature-phase modulated signals, respectively, from the gyroscope. The circuit includes a digital processor that receives the demodulated in-phase and quadrature phase signals from the demodulators and generates an output signal corresponding to a rotation of the gyroscope along a predetermined axis with reference to the in-phase demodulated signal and the quadrature-phase demodulated signal to remove a portion of the quadrature-phase signal from the in-phase signal.
    Type: Application
    Filed: August 26, 2013
    Publication date: February 26, 2015
    Applicant: Robert Bosch GmbH
    Inventor: Chinwuba D. Ezekwe
  • Patent number: 8930136
    Abstract: A personal navigation device configured to determine heading readings continuously using data from a sensor in the personal navigation device. Heading readings are selected corresponding to a periodic event. A representative heading is determined from the selected heading readings. When a portion of the selected heading readings has a value within a range of the representative heading, a static heading indicator is asserted to indicate the personal navigation device is moving in a static heading. The static heading indicator may be used to smooth an estimated trajectory of the personal navigation device.
    Type: Grant
    Filed: April 1, 2011
    Date of Patent: January 6, 2015
    Assignee: Texas Instruments Incorporated
    Inventors: Tarkesh Pande, Jaiganesh Balakrishnan, Deric Waters, Goutam Dutta, Jayawardan Janardhanan, Sthanunathan Ramakrishnan, Sandeep Rao, Karthik Ramasubramanian
  • Patent number: 8912899
    Abstract: A system has at least one sensor and a controller communicatively coupled to the sensor. The system further has logic configured to calculate a calibration value based upon an initial state of the sensor and store the calibration value in memory.
    Type: Grant
    Filed: January 10, 2008
    Date of Patent: December 16, 2014
    Assignee: Integrity Tracking, LLC
    Inventor: Chris A. Otto
  • Patent number: 8908902
    Abstract: A device for verifying the integrity of an item of data displayed on a display device controlled by a video controller, the video controller being connected to the display device by an appropriate connection and transmitting to it a video signal including an input interface which allows the device to be connected at a branch of the connection between the video controller and the display device, a reconstruction device which is capable, from the derived video signal, of reconstructing an image corresponding to the image displayed on the display device; an analysis device which is capable of extracting an item of reconstructed data from the reconstructed image, a comparison device which is capable of comparing the reconstructed data with a reference value of the item of data to be displayed and an alarm means which is capable of activating a malfunction alarm in accordance with the result at the output of the comparison device.
    Type: Grant
    Filed: July 20, 2010
    Date of Patent: December 9, 2014
    Assignee: ALSTOM Transport SA
    Inventors: Jacques Fifis, Christian Louis Georges Henri Euvrard
  • Publication number: 20140343885
    Abstract: Sensors in one or more remote devices provide sensor output to a device having a controller. The controller analyzes the sensor data to determine the accuracy of the sensors outputting the sensor data. Based on the analysis, the controller calculates a calibration value to utilize in calibrating one or more of the sensors in the remote devices, or in one or more other devices.
    Type: Application
    Filed: October 26, 2012
    Publication date: November 20, 2014
    Applicant: Sony Mobile Communications AB
    Inventors: Magnus Abrahamsson, Gunnar Klinghult, Andreas Kristensson
  • Publication number: 20140336970
    Abstract: A system and method for determining errors and calibrating to correct errors associated with field sensors, including bias, scale, and orthogonality, includes receiving and providing to a processor angular rate data and a first field vector relative to a first reference directional field and a second field vector relative to a second reference field from at least one field sensor. The processor is configured to relate the first field vector and the second field vector to the angular rate data to determine an error of the at least one field sensor. The processor is also configured to identify a compensation for the error of the at lease one field sensor needed to correct the first field vector and the second field vector and repeat the preceding to identify changes in the error over time and compensate for the changes in the error over time.
    Type: Application
    Filed: May 13, 2013
    Publication date: November 13, 2014
    Inventors: Giancarlo Troni-Peralta, Louis L. Whitcomb
  • Patent number: 8868368
    Abstract: A method of estimating and extrapolating the position of an article is provided. The article's position is detected by relatively infrequent ultrasonic ranging, and provides more frequent reports from internal accelerometers, gyroscopes and optional magnetometers. In a first instance, the method includes calculating new position, velocity and orientation vectors by linearly interpolating between the readings of the sensors at two times. In a second instance, the method includes estimating the orientation of the article by calculating the duration of a timeslice, making a rotational increment matrix and taking the product of the initial orientation and the increment matrix for the appropriate number of timeslices. In a third instance, the method includes calculating the acceleration of an article between three ultrasonically determined locations and recalibrating the accelerometers to align the measured acceleration with the calculated acceleration.
    Type: Grant
    Filed: September 13, 2010
    Date of Patent: October 21, 2014
    Assignee: Performance Designed Products LLC
    Inventor: Thomas Peter Heath
  • Patent number: 8860933
    Abstract: An inertial sensing system comprises a first multi-axis atomic inertial sensor, a second multi-axis atomic inertial sensor, and an optical multiplexer optically coupled to the first and second multi-axis atomic inertial sensors. The optical multiplexer is configured to sequentially direct light along different axes of the first and second multi-axis atomic inertial sensors. A plurality of micro-electrical-mechanical systems (MEMS) inertial sensors is in operative communication with the first and second multi-axis atomic inertial sensors. Output signals from the first and second multi-axis atomic inertial sensors aid in correcting errors produced by the MEMS inertial sensors by sequentially updating output signals from the MEMS inertial sensors.
    Type: Grant
    Filed: October 26, 2012
    Date of Patent: October 14, 2014
    Assignee: Honeywell International Inc.
    Inventors: Robert Compton, Benjamin Mohr, Nicholas C. Cirillo, Jr.
  • 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
  • Publication number: 20140288867
    Abstract: A device may include a radio signal receiver, and an inertial navigation system. Additionally, the device may include a processor to determine that the inertial navigation system has been initiated, monitor a radio signal associated with a mobile network received at the radio signal receiver, and determine a channel impulse response (CIR) based on the radio signal. The device may also monitor a Doppler spread of the radio signal based on the CIR in a time domain until a zero Doppler spread is identified. The device may recalibrate the inertial navigation system based on the zero Doppler spread.
    Type: Application
    Filed: March 21, 2013
    Publication date: September 25, 2014
    Applicant: Sony Corporation
    Inventors: Peter C. Karlsson, Magnus Persson
  • Publication number: 20140278183
    Abstract: An inertial measurement system is disclosed. The inertial measurement system has an accelerometer processing unit that generates a calibrated accelerometer data. The inertial measurement system further includes a magnetometer processing unit generates a calibrated magnetometer data, and a gyroscope processing unit generates a calibrated gyroscope data. Using the calibrated accelerometer data, the calibrated magnetometer data, and the calibrated gyroscope data, the inertial measurement system generates a heading angle error indicative of the accuracy of the heading angle error.
    Type: Application
    Filed: August 23, 2013
    Publication date: September 18, 2014
    Applicant: Invensense, Inc.
    Inventors: Yuan Zheng, Shang-Hung Lin, Kerry Keal
  • Publication number: 20140236401
    Abstract: An attitude estimator that uses star tracker measurements and enhanced Kalman filtering, with or without attitude data, to provide three-axis rate estimates. The enhanced Kalman filtering comprises taking an average of forward and rearward propagations of the Kalman filter states and the error covariances. The star tracker-based rate estimates can be used to control the attitude of a satellite or to calibrate a sensor, such as a gyroscope.
    Type: Application
    Filed: February 14, 2014
    Publication date: August 21, 2014
    Applicant: The Boeing Company
    Inventors: Tung-Ching Tsao, Richard Y. Chiang
  • Publication number: 20140230520
    Abstract: One embodiment of the invention includes an accelerometer sensor system. The system includes a sensor comprising a proofmass and electrodes and being configured to generate acceleration feedback signals based on control signals applied to the electrodes in response to an input acceleration. The system also includes an acceleration component configured to measure the input acceleration based on the acceleration feedback signals. The system further includes an acceleration controller configured to generate the control signals to define a first scale-factor range associated with the sensor and to define a second scale-factor range associated with the sensor. The control system includes a calibration component configured to calibrate the accelerometer sensor system with respect to range-dependent bias error based on a difference between the measured input acceleration at each of the first scale-factor range and the second scale-factor range.
    Type: Application
    Filed: February 20, 2013
    Publication date: August 21, 2014
    Inventor: Michael D. BULATOWICZ
  • Publication number: 20140229136
    Abstract: A method and apparatus for estimating gyro scale factor during normal spacecraft operations, using small attitude motions that are compliant with mission pointing accuracy and stability requirements and a signal processing method that specifically detects the intentionally induced motions. This process increases operational availability by avoiding the need to take the spacecraft offline for large calibration maneuvers.
    Type: Application
    Filed: February 8, 2013
    Publication date: August 14, 2014
    Inventor: Alan D. Reth
  • Publication number: 20140222361
    Abstract: A bias value associated with a sensor, e.g., a time-varying, non-zero value which is output from a sensor when it is motionless, is estimated using a ZRO-tracking filter which is a combination of a moving-average filter and a Kalman filter having at least one constraint enforced against at least one operating parameter of the Kalman filter. It achieves faster convergence on an estimated bias value and produces less estimate error after convergence. A resultant bias estimate may then be used to compensate the biased output of the sensor in, e.g., a 3D pointing device.
    Type: Application
    Filed: February 10, 2014
    Publication date: August 7, 2014
    Applicant: Hillcrest Laboratories, Inc.
    Inventors: Hua SHENG, Bryan C. COOK, Matthew G. LIBERTY
  • Publication number: 20140214352
    Abstract: A circuit for use in conditioning a signal from a speed sensor. The circuit is configured to receive an analog signal from a speed sensor coupled to the circuit, acquire a threshold of the analog signal, generate a digital signal corresponding to the analog signal, based on the threshold, and output the digital signal.
    Type: Application
    Filed: January 31, 2013
    Publication date: July 31, 2014
    Applicant: GENERAL ELECTRIC COMPANY
    Inventors: Michael Alan Tart, Michael Dean Evans
  • Publication number: 20140195185
    Abstract: A system and method for estimating angular velocity are provided. The system and method use an accelerometer and magnetometer to estimate an angular velocity in place of a gyroscope in 9-axis sensor fusion to estimate angular orientation. The final angular velocity estimate is constructed from two partially independent angular velocity estimates, one using only magnetometer measurements and the other using only accelerometer measurements. The unobservable portion of each partial angular velocity estimate is provided by a projection from a third complete estimate that uses both accelerometer and magnetometer data.
    Type: Application
    Filed: January 7, 2013
    Publication date: July 10, 2014
    Applicant: Kionix, Inc.
    Inventor: Erik ANDERSON