Acceleration Utilizing An Inertial Element Patents (Class 73/1.38)
  • Patent number: 10436671
    Abstract: A shock-resistance testing apparatus includes a support base, a first rotating component and a controller provided on the support base. A second rotating component is coupled to one side of the first rotating component. A testing board is placed on the first rotating component. A falling board is placed on the testing board. The controller controls the first rotating component to drive the second rotating component rotating from one side of the testing board to another side of the testing board. The controller controls the second rotating component to lift the testing board. The controller controls the second rotating component to move away from the testing board so that the testing board falls.
    Type: Grant
    Filed: March 1, 2017
    Date of Patent: October 8, 2019
    Assignees: Fu Tai Hua Industry (Shenzhen) Co., Ltd., HON HAI PRECISION INDUSTRY CO., LTD.
    Inventors: Kang-Xian Yang, Ke-Rui Zeng, Kun-Jia Hsieh, I-Cheng Huang, Wen-Hsien Huang
  • Patent number: 10274510
    Abstract: Disclosed herein is a device including a MEMS sensor configured to generate a first differential capacitance representing a change in capacitance from a first original sensing capacitance value and a second differential capacitance representing a change in capacitance from a second original sensing capacitance value, with the first and second original sensing capacitance values being mismatched. A compensation circuit is configured to generate outputs for compensating the first and second differential capacitances for the mismatch. A capacitance to voltage converter receives the first and second differential capacitances and the outputs of the compensation circuit as input and generates an output voltage as a function thereof.
    Type: Grant
    Filed: February 9, 2016
    Date of Patent: April 30, 2019
    Assignee: STMicroelectronics, Inc.
    Inventors: Milad Alwardi, Deyou Fang
  • Patent number: 10241128
    Abstract: A closed loop method of controlling a capacitive accelerometer uses two servo loops. A Vcrit servo loop uses an output signal (S2) modulated by a sine wave signal (S1). The Vcrit control signal adjusts the magnitude of the PWM drive signals applied to the fixed capacitor electrodes of the accelerometer, thereby optimising open loop gain.
    Type: Grant
    Filed: September 22, 2014
    Date of Patent: March 26, 2019
    Assignee: ATLANTIC INERTIAL SYSTEMS LIMITED
    Inventors: Alan Richard Malvern, Kiran Harish
  • Patent number: 10240991
    Abstract: The present disclosure relates to an apparatus comprising at least one sensing capacitor and a controller, wherein the controller is configured to receive a signal from the at least one sensing capacitor indicative of a change of charge of the sensing capacitor, and wherein the controller is configured to determine an amount of force applied to the sensing capacitor, an acceleration of the sensing capacitor, a torsion of the sensing capacitor, a vibration of the sensing capacitor or a pulling force applied to the sensing capacitor based on the change of charge of the at least one sensing capacitor.
    Type: Grant
    Filed: October 16, 2017
    Date of Patent: March 26, 2019
    Assignee: TEXAS INSTRUMENTS INCORPORATED
    Inventor: Kai Gossner
  • Patent number: 10228414
    Abstract: Sensor devices and methods are provided where a test signal is applied to a capacitive sensor. Furthermore, a bias voltage is applied to the capacitive sensor via a high impedance component. A path for applying the test signal excludes the high impedance component. Using this testing signal, in some implementations a capacity imbalance of the capacitive sensor may be detected.
    Type: Grant
    Filed: March 23, 2016
    Date of Patent: March 12, 2019
    Assignee: Infineon Technologies AG
    Inventors: Cesare Buffa, Richard Gaggl
  • Patent number: 10119834
    Abstract: A suspended spring-mass system is suspended from a plurality of the anchoring points. A source voltage is provided from one of anchoring points to the suspended spring-mass system. The other anchoring points have measurement nodes which measure the voltage at those anchoring points. If a voltage other than the source voltage is received at one of the measurement nodes, an error is identified.
    Type: Grant
    Filed: September 7, 2016
    Date of Patent: November 6, 2018
    Assignee: PANASONIC CORPORATION
    Inventors: Adolfo Giambastiani, Jaakko Ruohio
  • Patent number: 10073136
    Abstract: Methods and apparatus to provide an integrated circuit having a magnetic sensing element having differential first and second outputs and an input, the input to receive current and first and second switches coupled to a respective one of the differential first and second outputs. A first voltage source is coupled between the first and second switches, the first and second switches having a first state in which the first voltage source is coupled across the differential first and second outputs, and an IC output can output a voltage corresponding to the first voltage source when the first and second switches are in the first state for monitoring operation of a signal path from the magnetic sensing element to the IC output.
    Type: Grant
    Filed: December 22, 2014
    Date of Patent: September 11, 2018
    Assignee: ALLEGRO MICROSYSTEMS, LLC
    Inventors: Shaun D. Milano, Georges El Bacha, Michael C. Doogue, William P. Taylor
  • Patent number: 10054607
    Abstract: A portable device such as a key fob includes a piezoelectric component, such as a vibrator or buzzer, and an accelerometer. Self-testing of the piezoelectric component in the portable device may be achieved by applying a test electrical signal to the piezoelectric component and determining whether a vibration is detected by the accelerometer. If a vibration is detected by the accelerometer, then a determination is made as to whether the vibration detected by the accelerometer matches the test electric signal applied to the piezoelectric component.
    Type: Grant
    Filed: May 12, 2016
    Date of Patent: August 21, 2018
    Assignee: GOOGLE LLC
    Inventors: Martin Unsal, Kenneth Louis Herman, Shao-Po Ma
  • Patent number: 10054442
    Abstract: The present disclosure relates to a method and apparatus for enhancing a navigation solution of a device within a platform (such as for example person, vehicle or vessel), wherein the mobility of the device may be constrained or unconstrained within the platform, and wherein the device can be tilted to any orientation including vertical or near vertical orientations, while still providing a seamless navigation solution. This method can enhance navigation solutions utilizing measurements from sensors (such as, for example, accelerometers, gyroscopes, magnetometers, etc.), whether in the presence or in the absence of absolute navigational information (such as, for example, GNSS or WiFi positioning).
    Type: Grant
    Filed: January 17, 2014
    Date of Patent: August 21, 2018
    Assignee: InvenSense, Inc.
    Inventors: Jacques Georgy, Zainab Syed
  • Patent number: 10008659
    Abstract: A fingerprint sensor includes a substrate, a first electrode on the substrate, a piezoelectric layer on the first electrode, and a second electrode on the piezoelectric layer.
    Type: Grant
    Filed: July 31, 2015
    Date of Patent: June 26, 2018
    Assignee: LG INNOTEK CO., LTD.
    Inventors: Jae Wan Park, Jung Hwan Bang, Sin Ae Jang, Jong Seon Jeong, Dong Keun Lee, Kyoung Jong Yoo
  • Patent number: 10003348
    Abstract: An analog-to-digital converter (ADC) using an amplifier-based noise shaping circuit. The amplifier-based noise shaping circuit generates a noise shaping signal. A comparator of the ADC has a first input terminal coupled to an output terminal of a capacitive data acquisition converter that captures an analog input, a second input terminal receiving the noise shaping signal, and an output terminal for observation of the digital representation of the analog input. The amplifier-based noise shaping circuit uses an amplifier to amplify a residual voltage obtained from the capacitive data acquisition converter and provides a switched capacitor network between the amplifier and the comparator for sampling the amplified residual voltage and generating the noise shaping signal.
    Type: Grant
    Filed: August 23, 2017
    Date of Patent: June 19, 2018
    Assignee: MEDIATEK INC.
    Inventor: Chun-Cheng Liu
  • Patent number: 9989553
    Abstract: Systems and methods are described herein for extracting inertial information from nonlinear periodic signals. A system for determining an inertial parameter can include circuitry configured for receiving first and second analog signals from first and second sensors, each sensor responsive to motion of a proof mass. The system can include circuitry configured for determining a difference between the first and second analog signals, determining a plurality of timestamps corresponding to times at which the difference crosses a threshold, and determining a plurality of time intervals based on the timestamp. The system can include circuitry configured for determining a result of applying a trigonometric function to a quantity, the quantity based on the plurality of time intervals and determining the inertial parameter based on the result.
    Type: Grant
    Filed: May 20, 2016
    Date of Patent: June 5, 2018
    Assignee: Lumedyne Technologies Incorporated
    Inventors: Richard Lee Waters, Mark Steven Fralick, Charles Harold Tally, IV, John David Jacobs
  • Patent number: 9983226
    Abstract: The invention relates to an acceleration sensor (400) comprising an excitation mass (420) having excitation electrodes (430), which excitation mass is movably mounted over a substrate (410) along a movement axis (x) and comprising detection electrodes (440) which are permanently connected to the substrate (410) and allocated to the excitation electrodes (430). A first group of pairings (450) of excitation electrode (430) and allocated detection electrodes (440) is suitable for deflecting the excitation mass (420) along the movement axis (x) in a first direction (460). A second group of pairings (450) of excitation electrodes (430) and allocated detection electrodes (440) is suitable for deflecting the excitation mass (420) along the movement axis (x) in a second direction (465), which is opposite the first direction (460). The number of pairings (450) in the first group is equal to the number of pairings (450) in the second group.
    Type: Grant
    Filed: January 4, 2016
    Date of Patent: May 29, 2018
    Assignee: Northrop Grumman Litef GmbH
    Inventor: Peter Leinfelder
  • Patent number: 9927460
    Abstract: A method and system for calibrating a rotational accelerometer. The method includes attaching a rotational accelerometer to be tested to a plate fitted with and second linear accelerometers and vibrating the plate. Angular acceleration measurements from the rotational accelerometer and linear acceleration measurements from the first and second linear accelerometers are obtained during the vibrating. The linear acceleration measurements are converted into angular acceleration values, and data representing, or usable for, a comparison of the angular acceleration measurements from the rotational accelerometer and the converted angular acceleration values is generated.
    Type: Grant
    Filed: May 3, 2012
    Date of Patent: March 27, 2018
    Assignee: BAE SYSTEMS plc
    Inventors: Daniel David Flooks, Michael Edward Weaver
  • Patent number: 9898670
    Abstract: The invention relates to monitoring the area in front of a vehicle by means of an apparatus that comprises at least two imaging devices (110, 120). Provided are a first imaging device (110), which covers a first imaging angle, and a second imaging device (120), which covers a second, greater imaging angle. The first imaging device (110) covers a first zone (111) of the area in front of the vehicle, while at the same time, the second imaging device (120) covers a second zone (121) of the area in front of the vehicle. The two imaging devices (110, 120) are positioned spaced, in particular spaced laterally, from one another such that a central area (140) is covered by both the first and the second imaging devices (110, 120). By fusing the data acquired by the imaging devices (110, 120), a stereo image of the central area is generated, while monoscopic images are generated of those zones that are each covered by only a first or a second imaging device.
    Type: Grant
    Filed: December 5, 2014
    Date of Patent: February 20, 2018
    Assignee: FTS Computertechnik GmbH
    Inventor: Stefan Poledna
  • Patent number: 9874459
    Abstract: A micro-system with integrated multi-axis actuation and sensing capabilities for in-situ calibration of long-term scale-factor drifts in the output signal of attached or monolithically integrated inertial sensors. The micro-system comprises a piezoelectric actuator, integrated position sensors, and a controller. The controller provides the electrical excitation signals to the actuator and receives and processes signals from the inertial sensors and the position sensors. The electrical excitation signals are adjusted to reduce undesired off-axis motion resulting from environmental vibration during operation or from misalignment and digressions from the process tolerance during fabrication. Capacitive position sensors allow for determination of the trajectory of the piezoelectric actuator and for electrostatic pull-down and lock-down of an actuation plate. Piezoelectric signals and piezoresistive signals are used to improve position sensing precision.
    Type: Grant
    Filed: February 24, 2016
    Date of Patent: January 23, 2018
    Assignee: THE REGENTS OF THE UNIVERSITY OF MICHIGAN
    Inventors: Khalil Najafi, Ethem Aktakka
  • Patent number: 9869553
    Abstract: A frequency readout gyroscope is provided, having 2 or 3 axes, in which the frequency of the carrier associated with the oscillation of the proof mass changes while the amplitude stays constant. The invention departs from conventional gyroscopes which rely on measuring transducer sense axis displacement (amplitude modulation) to determine angular input rate. The invention utilizes what could be termed a form of frequency modulation, such as evaluating frequency phase difference between the axes of modulation. Examples include gyroscopes having either a quadrature or Lissajous FM mode of operation, in which angle random walk contribution from the electronics is reduced by approximately two orders of magnitude.
    Type: Grant
    Filed: June 10, 2015
    Date of Patent: January 16, 2018
    Assignee: THE REGENTS OF THE UNIVERSITY OF CALIFORNIA
    Inventors: Bernhard E. Boser, Mitchell H. Kline
  • Patent number: 9804190
    Abstract: A system and calibration method utilizes time averaging to suppress inherent capacitance mismatches or temperature variations in MEMS devices, such as a tri-axial accelerometer. An calibration interface circuit, operatively coupled the MEMS sensor, effectively cancels a range of non-ideal capacitive mismatches by employing pockets of calibration charges that are controlled by the duty-cycle of a clock.
    Type: Grant
    Filed: September 15, 2015
    Date of Patent: October 31, 2017
    Assignee: PANASONIC CORPORATION
    Inventors: Yaesuk Jeong, Farrokh Ayazi
  • Patent number: 9807510
    Abstract: A transducer including a driven element and a magnet assembly. The magnet assembly is coupled to the driven element and includes a first and a second magnet, and a ferrous member. Each of the magnets have a first and second magnetic pole. The first magnetic pole of the first magnet and the first magnetic pole of the second magnet being proximate to each other and facing each other thereby defining a first magnetic zone therebetween, the first magnetic poles being similar, and the second magnetic poles being similar. The ferrous member couples a substantial amount of the magnetic field emanating from the second magnetic poles and directing the substantial amount of the magnetic field to a gap between the ferrous member and the first magnetic zone.
    Type: Grant
    Filed: May 11, 2016
    Date of Patent: October 31, 2017
    Inventor: Curtis E. Graber
  • Patent number: 9716476
    Abstract: An apparatus and method for DC offset compensation. An amplifier receives an input signal (AIN) and provides an amplified output signal (SOUT) and a feedback path provides DC offset compensation. The feedback path comprises at least one voltage controlled oscillator (VCO) and a counter. The VCO provides, over time, a first VCO output signal based on said amplified output signal and a second VCO output signal based on a reference signal (VREF). The counter generates first pulse counts based upon the first VCO output signal and second pulse counts based upon the second VCO output signal and provides a compensation signal based on a comparison of the first and second pulse counts. One voltage controlled oscillator may sequentially receive a signal based on said amplifier output signal and the reference signal from a multiplexer so as to sequentially produce the first and second VCO output signals.
    Type: Grant
    Filed: December 27, 2013
    Date of Patent: July 25, 2017
    Assignee: Cirrus Logic, Inc.
    Inventor: John Paul Lesso
  • Patent number: 9702897
    Abstract: One embodiment includes a method for dynamic self-calibration of an accelerometer system. The method includes forcing a proof-mass associated with a sensor of the accelerometer system in a first direction to a first predetermined position and obtaining a first measurement associated with the sensor in the first predetermined position via at least one force/detection element of the sensor. The method also includes forcing the proof-mass to a second predetermined position and obtaining a second measurement associated with the sensor in the second predetermined position via the at least one force/detection element of the sensor. The method further includes calibrating the accelerometer system based on the first and second measurements.
    Type: Grant
    Filed: July 25, 2013
    Date of Patent: July 11, 2017
    Assignee: Northrop Grumman Systems Corporation
    Inventors: Robert E. Stewart, Michael D. Bulatowicz
  • Patent number: 9651575
    Abstract: There is a testing device for testing a sensor. The testing device includes a rotating mechanism; a first rotating plate connected to the rotating mechanism so that the first rotating plate rotates around an orbital axis (Z1); a second plate rotatably attached to the first rotating plate at a rotating point, the second plate having a rotational axis (Z2) offset from the orbital axis (Z1) by a predetermined distance R; and a gripping mechanism attached to the second plate and configured to receive and fix the sensor relative to the second plate. The second plate follows a circular trajectory with constant attitude around the orbital axis (Z1).
    Type: Grant
    Filed: October 25, 2013
    Date of Patent: May 16, 2017
    Assignee: SERCEL INC.
    Inventor: John Hepp
  • Patent number: 9612255
    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: Grant
    Filed: February 20, 2013
    Date of Patent: April 4, 2017
    Assignee: Northrop Grumman Guidance and Electronic Company, Inc.
    Inventor: Michael D. Bulatowicz
  • Patent number: 9568387
    Abstract: A method of verifying a condition of a single-crystal pressure sensor is provided. The method includes providing a single-crystal pressure sensor that has at least one electrical characteristic that varies with applied pressure being coupled to a first output and a second output. The pressure sensor also has at least one resistive element therein. A current is applied through the resistive element to heat the pressure sensor. At least one output of the pressure sensor is monitored to determine a response of the pressure sensor to current-induced heat. A verification output is provided based on the response.
    Type: Grant
    Filed: August 8, 2012
    Date of Patent: February 14, 2017
    Assignee: Rosemount Inc.
    Inventor: Robert C. Hedtke
  • Patent number: 9547022
    Abstract: Systems and methods for determining, for a vehicle using an adjustable position accelerometer, at least one direction tuned direction vector indicating a direction for the vehicle, the direction tuned direction vector made up of an X(a) axis component, a Y(a) axis component, and a Z(a) axis component, the adjustable position accelerometer providing acceleration values, the values made up of an X(a) axis component, a Y(a) axis component, and a Z(a) axis component, where the accelerometer is arbitrarily mounted, and optionally movable, in the vehicle such that each of the X(a) axis component, a Y(a) axis component, and a Z(a) axis component may be partially in X,Y, and Z directions of the vehicle.
    Type: Grant
    Filed: March 14, 2014
    Date of Patent: January 17, 2017
    Assignee: TRAPEZE SOFTWARE ULC
    Inventor: Bradley Kenneth Braun
  • Patent number: 9506758
    Abstract: A detection device includes a driving circuit that drives a vibrator, and a detection circuit that receives a detection signal from the vibrator and performs a detection process of detecting a physical quantity signal corresponding to a physical quantity from the detection signal. The driving circuit performs intermittent driving in which the vibrator is driven in a driving period, and is not driven in a non-driving period, and the detection circuit performs the detection process of the physical quantity signal in the non-driving period of the intermittent driving.
    Type: Grant
    Filed: March 18, 2014
    Date of Patent: November 29, 2016
    Assignee: Seiko Epson Corporation
    Inventors: Katsuhiko Maki, Takashi Nomiya
  • Patent number: 9476709
    Abstract: Provided is a calibration apparatus, including: a holder for fixing an electronic device; a first motor for rotating the holder with a first rotation axis as a center; a second motor for rotating the holder with a second rotation axis perpendicular to the first rotation axis as a center; and a stopper for restricting a rotational position of the holder about the second rotation axis to a range between a reference position and a perpendicular position reached by rotating the holder by 90 degrees from the reference position, in which the first motor rotates the holder to which the electronic device is fixed at a predetermined speed in each of states in which the rotational position of the holder about the second rotation axis falls in the reference position and in which the rotational position of the holder about the second rotation axis falls in the perpendicular position.
    Type: Grant
    Filed: November 8, 2011
    Date of Patent: October 25, 2016
    Assignees: Sony Corporation, Sony Interactive Entertainment Inc.
    Inventors: Noriyuki Fukushima, Hiroshi Osawa
  • Patent number: 9442035
    Abstract: A device for classifying strain gauges includes a holder capable of receiving strain gauges and capable of being rotated by a rotating device, the holder being connected to the rotating device by a linking device; and a heater capable of heating the holder and arranged about the mounting, the linking device including a cooling device capable of limiting the heating of the rotating device.
    Type: Grant
    Filed: May 30, 2012
    Date of Patent: September 13, 2016
    Assignee: SNECMA
    Inventors: Emmanuel Depots, Stéphane Clemot, Stéphane Rousselin, Etienne Tulie, Sébastien Voisin
  • Patent number: 9366692
    Abstract: In a mechanical test system, a method of compensating for acceleration induced load error in a load sensor in a mechanical communication with a component comprises measuring an acceleration of the component to obtain an acceleration measurement. A load sensor measures a force applied by the mechanical test system to a test sample in substantially a same direction of the acceleration to obtain a force measurement. The force measurement is modified with a transfer function that includes at least one of a gain correction and a phase correction to compensate for an error value in the force measurement attributed to movement of at least the load sensor when the force is applied to the test sample.
    Type: Grant
    Filed: May 21, 2013
    Date of Patent: June 14, 2016
    Assignee: TA INSTRUMENTS-WATERS L.L.C.
    Inventors: Andrew D White, David Deviley, David Dingmann
  • Patent number: 9228916
    Abstract: Self calibrating micro-fabricated load cells are disclosed. According to one embodiment, a self calibrating load cell comprises a resonant double ended tuning fork force sensor and a phase locked loop circuit for detection of frequency changes upon external load application to the resonant double ended tuning fork force sensor.
    Type: Grant
    Filed: March 15, 2013
    Date of Patent: January 5, 2016
    Assignee: THE REGENTS OF THE UNIVERSITY OF CALIFORNIA
    Inventors: Lorenzo Valdevit, Kivanc Azgin
  • Patent number: 9165196
    Abstract: Systems and methods directed to augmenting advanced driver assistance systems (ADAS) features of a vehicle with image processing support in on-board vehicle platform are described herein. Images may be received from one or more image sensors associated with an ADAS of a vehicle. The received images may be processed. An action is determined based upon, at least in part, the processed images. A message is transmitted to an ADAS controller responsive to the determination.
    Type: Grant
    Filed: November 16, 2012
    Date of Patent: October 20, 2015
    Assignee: Intel Corporation
    Inventors: Vijay Sarathi Kesavan, Victor B. Lortz, Anand P. Rangarajan, Somya Rathi
  • Patent number: 9128136
    Abstract: Embodiments relate to an apparatus for determining a sensitivity of a capacitive sensing device having a sensor capacitor with a variable capacitance. The apparatus includes a measurement module and a processor. The measurement module is configured to determine, in response to a first electrical input signal to the sensor capacitor, a first quantity indicative of a first capacitance of the sensor capacitor and to determine, in response to a second electrical input signal to the sensor capacitor, a second quantity indicative of a second capacitance of the sensor capacitor. The processor is configured to determine the sensitivity of the sensing device based on the determined first and second quantity.
    Type: Grant
    Filed: March 15, 2013
    Date of Patent: September 8, 2015
    Assignee: Infineon Technologies AG
    Inventors: Christoph Bernhard Wurzinger, Andreas Wiesbauer
  • Patent number: 9123188
    Abstract: Provided is an acceleration detection apparatus installed in a vehicle and including a plurality of acceleration sensors having different characteristics, a function to input diagnosis signals in order to diagnose the outputs of the acceleration sensors and diagnose the fault detection functions while the vehicle stops, and a function to compare the outputs of the sensors in order to detect a fault while the vehicle runs.
    Type: Grant
    Filed: August 9, 2013
    Date of Patent: September 1, 2015
    Assignee: Hitachi Automotive Systems, Ltd.
    Inventors: Toshiaki Nakamura, Masahide Hayashi
  • Patent number: 9116166
    Abstract: A system and method are disclosed for automatically calibrating capacitive transducers to neutralize feed-through capacitance using linear actuation. The method includes starting with an initial neutralization capacitance, applying no electrostatic force and two known electrostatic forces to a proof mass of the transducer, recording the transducer output changes due to the applied forces; and determining how to revise neutralization capacitance based on the changes. The method can use a binary search to find a final neutralization capacitance providing the best linearity. The method can include comparing the final linearity to a threshold linearity. The electrostatic forces can be applied using a charge control method where the electrostatic force is a linear function of the actuation duration. The linear actuation can be used for continuous self-test of capacitive sensors.
    Type: Grant
    Filed: July 17, 2012
    Date of Patent: August 25, 2015
    Assignee: Robert Bosch GmbH
    Inventors: Ganesh Balachandran, Vladimir Petkov
  • Patent number: 9050525
    Abstract: An information processing program is provided, which is executed by a computer of an information processing apparatus that executes predetermined processing based on acceleration data outputted from an input device including an acceleration sensor for detecting acceleration. The information processing program causes the computer to function as data obtaining means, change amount calculation means, and gravity direction calculation means. The data obtaining means repeatedly obtains the acceleration data. The change amount calculation means calculates, by using a history of acceleration indicated by the acceleration data, a change amount of acceleration generated in the input device. The gravity direction calculation means calculates a direction of gravity of the input device by using the acceleration indicated by the acceleration data, based on the change amount of the acceleration.
    Type: Grant
    Filed: July 28, 2009
    Date of Patent: June 9, 2015
    Assignee: NINTENDO CO., LTD.
    Inventor: Takuhiro Dohta
  • Patent number: 9032777
    Abstract: A system and method are disclosed for automatically calibrating capacitive transducers to neutralize feed-through capacitance using linear actuation. The method includes starting with an initial neutralization capacitance, applying no electrostatic force and two known electrostatic forces to a proof mass of the transducer, recording the transducer output changes due to the applied forces; and determining how to revise neutralization capacitance based on the changes. The method can use a binary search to find a final neutralization capacitance providing the best linearity. The method can include comparing the final linearity to a threshold linearity. The electrostatic forces can be applied using a charge control method where the electrostatic force is a linear function of the actuation duration. The linear actuation can be used for continuous self-test of capacitive sensors.
    Type: Grant
    Filed: September 16, 2011
    Date of Patent: May 19, 2015
    Assignee: Robert Bosch GmbH
    Inventors: Ganesh Balachandran, Vladimir Petkov
  • Publication number: 20150121989
    Abstract: An apparatus and method is presented for calibrating an output(s) of an inertial measurement unit (IMU) using rotational rate as a reference. Calibrating the IMU output(s) is performed by comparing the IMU output(s) to expected output(s), where the expected output(s) are determined based on the known rate of rotation of the IMU and the centripetal force acting on the IMU due to known rate of rotation. By analyzing the differences between the expected IMU output(s) and the IMU output(s), it is possible to determine a correction factor that, when applied to the IMU output(s), calibrates the IMU output(s) by correcting for measurement errors.
    Type: Application
    Filed: November 5, 2013
    Publication date: May 7, 2015
    Applicant: ThinKom Solutions, Inc.
    Inventor: Pawel Orzechowski
  • Patent number: 9024772
    Abstract: A system is invented to combine different signals from various sensors together so that an object (such as a car, an airplane etc.)'s position and/or orientation can be measured.
    Type: Grant
    Filed: September 28, 2011
    Date of Patent: May 5, 2015
    Inventors: Xianghui Wang, Wensheng Hua
  • Publication number: 20150114079
    Abstract: There is a testing device for testing a sensor. The testing device includes a rotating mechanism; a first rotating plate connected to the rotating mechanism so that the first rotating plate rotates around an orbital axis (Z1); a second plate rotatably attached to the first rotating plate at a rotating point, the second plate having a rotational axis (Z2) offset from the orbital axis (Z1) by a predetermined distance R; and a gripping mechanism attached to the second plate and configured to receive and fix the sensor relative to the second plate. The second plate follows a circular trajectory with constant attitude around the orbital axis (Z1).
    Type: Application
    Filed: October 25, 2013
    Publication date: April 30, 2015
    Applicant: Sercel, Inc.
    Inventor: John HEPP
  • 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: 9010170
    Abstract: A technique includes using an accelerometer to provide an output signal indicative of an acceleration experienced by a movable mass of a sensor of the accelerometer. The technique includes testing the accelerometer, and the testing includes using a closed loop including the sensor to provide the output signal of the accelerometer; injecting a test signal into the loop between an output terminal of the sensor and an output terminal of the accelerometer; and indicating a performance of the accelerometer based on a response of the accelerometer to the injection of the test signal.
    Type: Grant
    Filed: June 22, 2011
    Date of Patent: April 21, 2015
    Assignee: Westerngeco L.L.C.
    Inventors: Hans Paulson, Daniel Rönnow
  • Patent number: 9004862
    Abstract: A control system for calibrating a wind turbine sensor placed on a component of a wind turbine and related methods are disclosed. The wind turbine includes a rotor having at least one wind turbine blade. The method comprises pitching one or more of the at least one of the wind turbine blades according to a predetermined pitch movement which induces a vibratory motion in the at least one turbine blade. A wind turbine sensor measures a vibratory response signal at least partly caused by the vibratory motion. A characteristic sensor response value is determined from the vibratory response signal. The characteristic sensor response value may be compared to a predetermined sensor calibration parameter to determine whether a difference is greater than a predefined tolerance parameter. In this manner, the wind turbine sensor may be calibrated.
    Type: Grant
    Filed: December 27, 2012
    Date of Patent: April 14, 2015
    Assignee: Vestas Wind Systems A/S
    Inventor: Erik Carl Lehnskov Miranda
  • Patent number: 9008995
    Abstract: A method of detecting activity with a MEMS accelerometer stores a value of acceleration, then measures acceleration at a later time, calculates a change in acceleration using the measured acceleration and the stored acceleration, and compares the change in acceleration to an activity threshold to detect activity. A method of detecting inactivity uses a similar technique along with a timer. The method of detecting inactivity with a MEMS accelerometer stores an acceleration value, then measures acceleration at a later time, calculates a change in acceleration using the measured acceleration and the stored acceleration, and compares the change in acceleration to an inactivity threshold. If the change in acceleration is less than the inactivity threshold and, if a predetermined period of time has elapsed, then inactivity is detected.
    Type: Grant
    Filed: June 6, 2012
    Date of Patent: April 14, 2015
    Assignee: Analog Devices, Inc.
    Inventors: James M. Lee, John Memishian
  • Patent number: 9003862
    Abstract: A downhole sensor calibration apparatus includes a rotational or gimbaling mechanism for guiding a sensing axis of an orientation responsive sensor through a three-dimensional orbit about three orthogonal axes. A method includes using measurements taken over the three-dimensional orbit to calibrate the sensor and determine other characteristics of the sensor or tool.
    Type: Grant
    Filed: September 9, 2013
    Date of Patent: April 14, 2015
    Assignee: Halliburton Energy Services, Inc.
    Inventors: Paul F. Rodney, Adan Hernandez Herrera, Christopher Allen Golla, James H. Dudley, Joe Marzouk
  • Patent number: 8978439
    Abstract: A vehicle sensor system consisting of video, radar, ultrasonic or laser sensors, oriented to obtain a 360 degree view around the vehicle for the purpose of developing a situation or scene awareness. The sensors may or may not have overlapping field of views, or support the same applications, but data will be shared by all. Orientation of the sensor to the vehicle body coordinates is critical in order to accurately assess threat and respond. This system describes methods based on measuring force and rotation on each sensor and computing a dynamic alignment to first each other, then second to the vehicle.
    Type: Grant
    Filed: January 20, 2011
    Date of Patent: March 17, 2015
    Assignee: Eagle Harbor Holdings, LLC
    Inventors: Dan Alan Preston, David Olmstead
  • Patent number: 8977512
    Abstract: Techniques and architecture are disclosed for performing alignment harmonization of a collection of electro-optical and/or gimbaled componentry that is to operate within a common coordinate frame. In some cases, the techniques and architecture can provide a cost- and time-efficient approach to achieving alignment harmonization that is compatible, for example, with field-test and/or operational environments. In some instances, the techniques and architecture can be used in concert with error calibration techniques to further improve the accuracy of the alignment harmonization. The techniques and architecture can be utilized with a wide range of components (e.g., sensors, armaments, targeting systems, weapons systems, countermeasure systems, navigational systems, surveillance systems, etc.) on a wide variety of platforms. Numerous configurations and variations will be apparent in light of this disclosure.
    Type: Grant
    Filed: June 15, 2012
    Date of Patent: March 10, 2015
    Assignee: BAE Systems Information and Electronic Systems Integration Inc.
    Inventors: Almond J. Coté, Kirby A. Smith
  • Publication number: 20150059430
    Abstract: An inertial force sensor includes a fixed part, a beam connected to the fixed part, a plummet connected to another end of the beam and being displaceable due to inertial force to cause the beam to deform, a conductive part provided at the plummet, a strain-sensitive resistor provided at the beam for detecting a deformation of the first beam, first and second fault diagnostic electrodes provided at the fixed part, a first fault diagnostic wiring for connecting the first fault diagnostic electrode to the conductive part through the beam, and a second fault diagnostic wiring for connecting the second fault diagnostic electrode to the conductive part through the beam. The inertial force sensor does not continue to output an erroneous output signal when a crack occurs in the plummet, thus having high reliability.
    Type: Application
    Filed: April 18, 2013
    Publication date: March 5, 2015
    Applicant: Panasonic Intellectual Property Management Co., Ltd.
    Inventors: Takashi Imanaka, Hiroyuki Aizawa, Takeshi Yokota
  • Patent number: 8939007
    Abstract: A detecting unit outputs an object signal corresponding to an inertial force. A corrected signal is generated by correcting the object signal. A first environment value is obtained at a first time point. A second environment value is obtained at a second time point after the first time point. An environment difference value which is a difference between the first and second environment values is calculated. An environment change detection signal is output when an absolute value of the environment difference value is larger than a predetermined determination threshold. A first averaged signal is output by averaging a corrected signal in a predetermined period continuing to the first time point. A second averaging signal is output by averaging the corrected signal in a predetermined period continuing to the second time point. An offset difference value which is a difference between the first and second averaged signals is calculated.
    Type: Grant
    Filed: April 26, 2012
    Date of Patent: January 27, 2015
    Assignee: Panasonic Corporation
    Inventors: Takeshi Uemura, Isao Hattori
  • Publication number: 20150025707
    Abstract: A control system adapted to be mounted on a motor vehicle for control of a motor vehicle system in accordance with the inertial state of the motor vehicle. The control system includes an inertial sensor providing an inertial measurement output in accordance with the inertial state of the motor vehicle, where the inertial measurement output is referenced to a reference voltage. A controller is provided for controlling the motor vehicle system at least partially in accordance with the inertial measurement output. The controller includes a circuit for comparing the reference voltage used by the inertial sensor to a nominal voltage. The circuit causes the controller to discontinue use of the inertial measurement output when the reference voltage deviates from the nominal voltage.
    Type: Application
    Filed: March 1, 2013
    Publication date: January 22, 2015
    Inventors: Greg Morningstar, Mike Babala, Paul Zatyko
  • Publication number: 20150020571
    Abstract: A method and system for fall detection using machine learning are disclosed. The method comprises detecting at least one signal by a wireless sensor device and calculating a plurality of features from the at least one detected signal. The method includes training a machine learning unit of the wireless sensor device using the features to create a fall classification and a non-fall classification for the fall detection. The system includes a sensor to detect at least one signal, a processor coupled to the sensor, and a memory device coupled to the processor, wherein the memory device includes an application that, when executed by the processor, causes the processor to calculate a plurality of features from the at least one detected signal and to train a machine learning unit of the wireless sensor device using the features to create a fall classification and a non-fall classification for the fall detection.
    Type: Application
    Filed: July 18, 2013
    Publication date: January 22, 2015
    Applicant: Vital Connect, Inc.
    Inventors: Alexander CHAN, Nima Ferdosi, Ravi Narasimhan