Diverse Sensors Patents (Class 324/207.14)
  • Patent number: 10761616
    Abstract: A common method for providing user-input to an electronic system consists of tracking the position and motion of an object moved by the user and conveying this information to the electronic system. One embodiment of a positional tracking system for an object has an external and stationary magnetic-field emitter, a magnetic-field sensor which moves with the tracked object, and a microprocessor that compares magnetic-field intensity measurements taken by the sensor and compares it to magnetic-field characteristics defined for the external magnetic field emitter. A nonlinear equation solver, particle filter, or other method is used to determine the position of the sensor in the magnetic field. In this way the position of an object can be tracked using a single magnetic field emission source. This positional information can be combined with an inertial tracking system to mitigate drift errors.
    Type: Grant
    Filed: July 9, 2016
    Date of Patent: September 1, 2020
    Inventor: Maximillian Hobson-Dupont
  • Patent number: 10746820
    Abstract: A magnetic field sensor can include a magnetic field sensor can include a substrate having a major surface in an x-y plane with an x axis and a y axis. The magnetic field sensor can also have an external field sensing circuit disposed upon the substrate and responsive to an external magnetic field generated outside of the magnetic field sensor. The external field sensing circuit can include one or more magnetoresistance elements, each having a respective reference layer with a magnetic direction parallel to the y axis and in the x-y plane. The one or more magnetoresistance elements can be operable to generate a magnetoresistance element signal responsive to the external magnetic field.
    Type: Grant
    Filed: October 11, 2018
    Date of Patent: August 18, 2020
    Assignee: Allegro MicroSystems, LLC
    Inventors: Rémy Lassalle-Balier, Bryan Cadugan
  • Patent number: 10697801
    Abstract: A rotational angle detection apparatus is provided with a magnet disposed so as to be rotatable integrally with an axis of rotation, having a substantially circular shape when viewed along the axis of rotation, and including a magnetization vector component in a direction orthogonal to the axis of rotation; a magnetic sensor that outputs a sensor signal on the basis of change in a magnetic field accompanying rotation of the magnet; and a rotational angle detector that detects a rotational angle of the rotating body on the basis of the sensor signal output by the magnetic sensor; wherein the magnet has a curved inclined surface with a concave shape along the axis of rotation from a prescribed position on the outer side in a radial direction toward the axis of rotation, and when a circular virtual plane orthogonal to the axis of rotation and centered at the axis of rotation is established at a position opposed to the curved inclined surface, the magnetic sensor is disposed at a position at which the amplitudes
    Type: Grant
    Filed: March 6, 2017
    Date of Patent: June 30, 2020
    Assignee: TDK Corporation
    Inventors: Masaki Nagata, Kazuya Watanabe, Hiraku Hirabayashi
  • Patent number: 10684141
    Abstract: A magnetic angle sensor device is suggested comprising a shaft that is arranged rotatably around a rotation axis, at least one permanent magnet, a stator and two magnetic angle sensors, which are fixed to the stator, wherein the shaft is arranged rotatably against the stator, wherein the at least one permanent magnet is connected to the shaft, and wherein the at least one permanent magnet is arranged to apply magnetic fields at the two magnetic angle sensors with different directions of diametrical magnetic field components.
    Type: Grant
    Filed: September 26, 2017
    Date of Patent: June 16, 2020
    Assignee: Infineon Technologies AG
    Inventor: Udo Ausserlechner
  • Patent number: 10378922
    Abstract: A rotation angle detection apparatus includes a magnet that is provided to a rotating shaft of a rotating body and rotates with the rotating shaft to generate magnetic flux and a magnetic sensor that is provided at a distance from the magnet and detects a magnetic flux interlinked with the magnetic sensor. The rotation angle detection apparatus has a magnet magnetic flux detection circuit that detects a magnet magnetic flux generated from the magnet, a disturbance magnetic flux detection circuit that detects a disturbance magnetic flux, which is a magnetic flux other than the magnet magnetic flux and is interlinked with the magnetic sensor, and a correction circuit that corrects a result of detection of the magnetic sensor based on a result of detection of the magnet magnetic flux detection circuit and a result of detection of the disturbance magnetic flux detection circuit.
    Type: Grant
    Filed: January 13, 2016
    Date of Patent: August 13, 2019
    Assignee: DENSO CORPORATION
    Inventors: Takuya Kawamura, Hirofumi Kinjou, Toru Wakimoto, Hideaki Nakayama, Masataka Yoshimura
  • Patent number: 10012707
    Abstract: A magnetic field sensor includes built-in self-test coils in a configuration to provide magnetic field stimulation along three axes, with a high field factor, and thus, reduce a power budget of the sensor and physical size of the self-test coils. The magnetic field sensor comprises a first bridge circuit including a plurality of sense elements configured to sense a magnetic field. The magnetic field sensor further comprises re-configurable self-test current lines coupled to a self-test source to perform high field, high power wafer and die level testing and trim, as well as low power in-situ characterization and calibration of the sensor. The self-test current lines may be routed to form a coil with multiple turns around the TMR elements.
    Type: Grant
    Filed: April 27, 2016
    Date of Patent: July 3, 2018
    Assignee: Everspin Technologies, Inc.
    Inventors: Phillip G. Mather, Anuraag Mohan, Guido De Sandre
  • Patent number: 9991040
    Abstract: Inductive elements comprising anisotropic media and biasing coils for magnetically biasing thereof and methods of manufacture and operation for use in applications such as microelectronics. Application of an electrical current through the bias coils generates a magnetic field that biases the magnetic material such that a desirable orientation of anisotropy is achieved throughout the magnetic core and enables modulation of the inductive response of the device. Electrical conductors coupled to interconnects are magnetically coupled to magnetic core layers to produce self and/or mutual inductors.
    Type: Grant
    Filed: June 23, 2015
    Date of Patent: June 5, 2018
    Assignee: Ferric, Inc.
    Inventors: Noah Sturcken, Ryan Davies, Hao Wu
  • Patent number: 9983326
    Abstract: An electromagnetic (EM) receiver system for measuring EM signals. The EM receiver system includes a survey EM transmitter for generating survey EM signals within a first frequency range; a tracking EM transmitter for generating tracking signals within a second frequency range; and a receiver section including a receiver that measures both the survey EM signals and the tracking signals.
    Type: Grant
    Filed: April 3, 2015
    Date of Patent: May 29, 2018
    Assignee: CGG SERVICES SAS
    Inventors: Philip Miles, Jason Berringer
  • Patent number: 9913693
    Abstract: A medical system includes a sensor location module, a first module, and a second module. The sensor location module determines a location of a magnetic field sensor within a magnetic field. The first module determines an acceleration of the magnetic field sensor. The second module indicates a modified location of the magnetic field sensor in an image of a medical patient based on the acceleration and one or more previously determined locations.
    Type: Grant
    Filed: October 29, 2010
    Date of Patent: March 13, 2018
    Assignee: Medtronic, Inc.
    Inventors: Randal C. Schulhauser, Paul Gerrish, Michael F. Mattes, Todd A. Kallmyer, Patrick P. Senarith, Per Klype, David A. Ruben
  • Patent number: 9474505
    Abstract: The embodiments of the tracking device for the ultrasound imaging diagnostic apparatus include a predetermined combination of an ultrasound probe, an operator and a patient to be tracked, a space measuring device for measuring at least distance and angle of the probe based upon emitted electromagnetic radiation that is emitted towards the probe and reflected electromagnetic radiation that is reflected from the probe; and a processing device connected to the space measuring device for determining a change in distance and angle of the probe in space based upon on the emitted electromagnetic radiation and the reflected electromagnetic radiation. The space measuring device is used to track movement in a combination of a probe, a patient and an operator.
    Type: Grant
    Filed: March 16, 2012
    Date of Patent: October 25, 2016
    Assignee: TOSHIBA MEDICAL SYSTEMS CORPORATION
    Inventors: Zoran Banjanin, Christopher J. Sanders
  • Patent number: 9372065
    Abstract: A steering torque-steering angle sensor comprising a steering torque sensor module and a steering angle sensor module, wherein the steering torque sensor module operates with a magnetic effective principle and has in this respect a first magnetic encoder and at least one first magnetic field sensor element, wherein the steering angle sensor module has at least a second magnetic field sensor element and a third magnetic field sensor element, wherein the second magnetic field sensor element directly or indirectly senses the magnetic field of the first magnetic encoder, that is to say of the magnetic encoder of the steering torque sensor module, and wherein the third magnetic field sensor element senses the magnetic field of an additional, second magnetic encoder.
    Type: Grant
    Filed: August 24, 2012
    Date of Patent: June 21, 2016
    Assignee: Continental Teves AG & Co. oHG
    Inventors: Henrik Antoni, Heinrich Acker
  • Patent number: 9350359
    Abstract: A circuit includes a magnetic logic unit including input terminals, output terminals, a field line, and magnetic tunnel junctions (MTJs). The field line electrically connects a first and a second input terminal, and is configured to generate a magnetic field based on an input to at least one of the first and the second input terminal. The input is based on an analog input to the circuit. Each MTJ is electrically connected to a first output terminal and a second output terminal, and is configured such that an output of at least one of the first and the second output terminal varies in response to a combined resistance of the MTJs. The resistance of each of the MTJs varies based on the magnetic field. The circuit is configured to generate an analog output based on the output of at least one of the first and the second output terminal.
    Type: Grant
    Filed: January 27, 2015
    Date of Patent: May 24, 2016
    Assignee: Crocus Technology Inc.
    Inventors: Douglas J. Lee, Yaron Oren-Pines, Seyed A. Tabatabaei, Stuart Desmond Rumley, Bertrand F. Cambou
  • Patent number: 9035647
    Abstract: An encoder is configured for detection of rotational movement of a rotatable shaft in relation to a part of a machine, and a method is provided for generating a reference signal by an encoder.
    Type: Grant
    Filed: March 14, 2013
    Date of Patent: May 19, 2015
    Assignee: LEINE & LINDE AB
    Inventors: Fredrik Gustafsson, Lars Peter Johan Kjellqvist
  • Publication number: 20150097554
    Abstract: A method for measuring a location of a user terminal, using a magnetic field includes receiving information on a map of the magnetic field; acquiring a first measured value from a magnetic field sensor provided in the user terminal; acquiring a second measured value from another sensor provided in the user terminal and distinguished from the magnetic field sensor; and measuring a location of the user terminal based on the information on the map of the magnetic field, the first measured value and the second measured value.
    Type: Application
    Filed: January 13, 2014
    Publication date: April 9, 2015
    Applicant: IDECCA INC.
    Inventor: Chan Jong Park
  • Patent number: 8978698
    Abstract: A blowout preventer for sealing a tubular of a wellbore is provided. The blowout preventer has a housing having a bore therethrough for receiving the tubular, at least one ram slidably positionable in the housing (each of the rams having a ram block for sealing engagement about the tubular), an actuator for selectively driving the ram block (the actuator comprising a piston slidably positionable in a cylinder), and a monitor for detecting the piston therein. The monitor has a visual indicator on an exterior of the cylinder. The visual indicator is operatively coupled to the piston for displaying a position of the piston as the piston travels within the cylinder whereby a position of the ram may be determined.
    Type: Grant
    Filed: June 24, 2011
    Date of Patent: March 17, 2015
    Assignee: National Oilwell Varco, L.P.
    Inventors: Joseph James Liotta, Eric Trevor Ensley, Christopher Dale Johnson
  • Publication number: 20150028858
    Abstract: A sensor system determines an absolute angular position of a to-be-sensed rotating member. The sensor system may include a rotor with a first magnet coupled to the rotor and a shaft having threads thereon. The sensor system may further include a sleeve with a second magnet and threads complementary to the threads of a shaft. The sleeve may be configured to travel axially along the shaft as a function of rotation of the rotor. The sensor system may also include a first transducer configured to sense orientation of the first magnet and at least one second transducer configured to sense a location of the second magnet along the shaft. Through use of the sensor system, an absolute number of turns and, consequently absolute angular position, of the rotating member can be determined.
    Type: Application
    Filed: July 26, 2013
    Publication date: January 29, 2015
    Inventor: Rene Putinier
  • Publication number: 20150022192
    Abstract: A discrete magnetic angle sensor device according to an embodiment includes a first magnetic field gradiometer and a second magnetic field gradiometer. The first magnetic field gradiometer and the second magnetic field gradiometer are of different types of a group of gradiometer types. An embodiment may improve an accuracy of a determination of a rotation angle.
    Type: Application
    Filed: July 17, 2013
    Publication date: January 22, 2015
    Inventor: Udo Ausserlechner
  • Patent number: 8890513
    Abstract: Device for measuring the rotating angle of two objects rotating in relation to each other, with a transmitter which is assigned to one of the objects and which emits light that is either polarized or becomes polarized by means of a polarization filter, and with a polarization-sensitive analyzer such that the transmitter and the analyzer rotate relative to each other as dependent on the rotating angle, and with a receiver which measures the intensity of light passing through the analyzer in order to create a signal that is dependent on the rotating angle, where a magnetized element is positioned on one of the objects and a sensor for detecting a magnetic field is positioned on the other object.
    Type: Grant
    Filed: February 13, 2012
    Date of Patent: November 18, 2014
    Assignee: Sick Stegmann GmbH
    Inventor: Stefan Basler
  • Publication number: 20140253106
    Abstract: A method for measuring an angular position of a rotating shaft, the method including providing a magnetic field which rotates with the shaft about an axis of rotation, positioning an integrated circuit having first and second magnetic sensing bridges within the magnetic field at a radially off-center position from the axis of rotation, the first and second magnetic sensing bridges respectively providing first and second signals representative of first and second magnetic field directions, the integrated circuit having a set of adjustment parameters for modifying attributes of the first and second signals, modifying values of the set of adjustment parameters until errors in the first and second signals are substantially minimized, and determining an angular position of the shaft based on the first and second signals.
    Type: Application
    Filed: May 23, 2014
    Publication date: September 11, 2014
    Applicant: Infineon Technologies AG
    Inventors: Wolfgang Granig, Dirk Hammerschmidt, Udo Ausserlechner
  • Patent number: 8813778
    Abstract: A valve control system includes a valve control device and a hand-held actuating apparatus for triggering operating actions within the valve control device. The hand-held actuating apparatus includes a magnet arrangement and the valve control device includes a magnetic field sensor arrangement adapted to the magnet arrangement of the hand-held actuating apparatus. The magnet arrangement includes one or more magnets and an actuating means. The magnetic fields of the magnets are individually variable by the actuating means without movement of the hand-held actuating apparatus relative to the magnetic field sensor arrangement.
    Type: Grant
    Filed: February 27, 2013
    Date of Patent: August 26, 2014
    Assignee: Buerkert Werke GmbH
    Inventors: René Bachmann, Ulrike Brinkmann, Kersten Grosse
  • Patent number: 8797024
    Abstract: The present invention is directed to a sensor with a body and a magnetic field sensor. The body includes a plurality of structures arranged in a first direction to effect a periodically varying magnetic field upon movement of the body in the first direction. The magnetic field sensor is configured to detect components of the magnetic field in a second direction and in a third direction, wherein the magnetic field sensor is arranged adjacent to the body such that the second direction is perpendicular to the first direction and such that the third direction is perpendicular to the first direction and to the second direction.
    Type: Grant
    Filed: February 1, 2011
    Date of Patent: August 5, 2014
    Assignee: Infineon Technologies AG
    Inventor: Udo Ausserlechner
  • Publication number: 20140191625
    Abstract: In an abnormality detection system for a rotation angle sensor, a fact that an abnormality has occurred in one of sine signals (S1, S2) or in one of cosine signals (S3, S4) is detected based on a sum of the electrical signals (S1, S2), and a sum of the electrical signals (S3, S4) (first detection result). A fact that an abnormality has occurred in one of the positive sine and cosine signals (S1, S3) or in one of the negative sine and cosine signals (S2, S4) by comparing a first temperature computed using a correlation between an amplitude and a temperature and based on the electrical signals (S1, S3), a second temperature computed using a correlation between the amplitude and a temperature and based on the electrical signals (S2, S4), and a third temperature detected by a temperature sensor with each other (second detection result). A microcomputer identifies which of the electrical signals is abnormal by comparing the first and second detection results with each other.
    Type: Application
    Filed: December 18, 2013
    Publication date: July 10, 2014
    Applicant: JTEKT CORPORATION
    Inventor: Hiroshi KITAMOTO
  • Publication number: 20140055128
    Abstract: A rotation sensor assembly includes a rotated component rotatably coupled with a base. The rotation sensor assembly includes a transmitter and a receiver. The transmitter is coupled with the base or the rotated component. The transmitter generates a magnetic field including a sinusoidally time-varying dipole near-field corresponding to an excitation signal having a first phase value. The receiver is coupled with the other of the rotated component or the base. The receiver detects the magnetic field and generates a reception signal based on the magnetic field with a second phase value corresponding to a rotation angle of the rotated component relative to the base. The receiver is mechanically isolated from the transmitter. A rotation angle module is coupled with the transmitter. The rotation angle module, for instance a phase detector, measures the rotation angle of the rotated component based on the phase difference in the first and second phase values.
    Type: Application
    Filed: August 23, 2012
    Publication date: February 27, 2014
    Applicant: RAVEN INDUSTRIES, INC.
    Inventors: Clarence Walt Fowler, Robert Leonard Nelson, JR., Scott Porter
  • Publication number: 20140015520
    Abstract: This disclosure describes techniques for sensing an angular position of a rotating object over an angular position range that includes up to 360 degrees using an arc position encoder comprising a substantially 180-degree angular position sensing range. The encoder may include a base comprising an arc length defined by a first and a second end, one or more magnetic field sensors disposed within the base between the first and second ends, and one or more polarity transition sensors also disposed within the base between the first and second ends. The encoder may further include a magnetic target that includes first and second magnetic poles disposed on opposite ends so as to generate a uniform magnetic field, wherein the magnetic target is coupled to the rotating object so as to rotate about an axis of rotation located substantially in a center of a circle defined by the base.
    Type: Application
    Filed: July 16, 2012
    Publication date: January 16, 2014
    Applicant: HONEYWELL INTERNATIONAL INC.
    Inventors: ShanoPrasad Kunjappan, Perry A. Holman, JR., Madhan Raj Bagianathan, Dinesh Naik, Christopher Kenney, Ravi Kasturi Raj
  • Publication number: 20140009043
    Abstract: An encoder includes a rotary disc, a magnetic detection mechanism, an optical detection mechanism, a first detection signal generator, a second detection signal generator, and a multiple turn detector. The magnetic detection mechanism is to magnetically detect rotation of the rotary disc. The optical detection mechanism is to optically detect the rotation of the rotary disc. The first detection signal generator is configured to generate a first detection signal based on an output from the magnetic detection mechanism. The second detection signal generator is configured to generate a second detection signal having a predetermined phase difference from the first detection signal based on an output from the optical detection mechanism. The multiple turn detector is configured to detect a multiple turning amount of the rotary disc based on the first and second detection signals.
    Type: Application
    Filed: May 22, 2013
    Publication date: January 9, 2014
    Applicant: KABUSHIKI KAISHA YASKAWA DENKI
    Inventor: Atsufumi WATANABE
  • Patent number: 8611986
    Abstract: A system and method for performing object localization based on the emission of electromagnetic fields. The electromagnetic fields are simultaneously emitted from different transmitters. One electromagnetic field is emitted at a base frequency; the remaining waves are emitted at frequencies that are harmonics of the base frequency. The composite magnetic fields are measured by sensors. The signal generated by each sensor is subject to a Fourier analysis to determine the strengths of the individual electromagnetic fields forming the composite electromagnetic field. These individual measure field strength data are then used to determine the position and orientation of the sensors relative to the transmitters.
    Type: Grant
    Filed: March 2, 2012
    Date of Patent: December 17, 2013
    Assignee: Stryker Corporation
    Inventor: Chunwu Wu
  • Publication number: 20130278247
    Abstract: Disclosed are techniques for sensing an angular position of a rotating object over a 360-degree angular position range using an arc position encoder comprising a 180-degree angular position sensing range. The encoder may include a base defined by first and second ends, one or more magnetic field sensors disposed within the base between the first and second ends, one or more of first and second base extensions disposed on the first and second ends, and one or more polarity transition sensors disposed within the one or more of the first and second base extensions. The encoder may further include a magnetic target having first and second magnetic poles disposed on opposite ends so as to generate a uniform magnetic field, wherein the magnetic target is coupled to the rotating object so as to rotate about an axis of rotation located in a center of a circle defined by the base.
    Type: Application
    Filed: April 18, 2012
    Publication date: October 24, 2013
    Applicant: HONEYWELL INTERNATIONAL INC.
    Inventors: ShanoPrasad Kunjappan, Dinesh Naik, Madhan Raj Bagianathan, Manikandan M.
  • Publication number: 20130241536
    Abstract: An apparatus includes circuits, a field line configured to generate a magnetic field based on an input, a sensing module configured to determine a parameter of each circuit, and a magnetic field direction determination module configured to determine an angular orientation of the apparatus relative to an external magnetic field based on the parameter. Each circuit includes multiple magnetic tunnel junctions. Each magnetic tunnel junction includes a storage layer having a storage magnetization direction and a sense layer having a sense magnetization direction configured based on the magnetic field. Each magnetic tunnel junction is configured such that the sense magnetization direction and a resistance of the magnetic tunnel junction vary based on the external magnetic field. The parameter varies based on the resistances of the multiple magnetic tunnel junctions. The magnetic field direction determination module is implemented in at least one of a memory or a processing device.
    Type: Application
    Filed: March 6, 2013
    Publication date: September 19, 2013
    Applicant: CROCUS TECHNOLOGY INC.
    Inventors: Bertrand F. Cambou, Douglas J. Lee, Ken Mackay, Barry Hoberman
  • Patent number: 8531182
    Abstract: A control system for use in safety critical human/machine control interfaces is described, more particularly a joystick type control system and particularly a joystick type control system utilizing magnetic positional sensing. The control system provides a control input device having a movable magnet, a pole-piece frame arrangement positioned about the magnet, at least three magnetic flux sensors being positioned in said pole-piece frame arrangement and a monitoring arrangement for monitoring the output signal of each of said at least three sensors.
    Type: Grant
    Filed: June 19, 2008
    Date of Patent: September 10, 2013
    Assignee: Penny & Giles Controls Limited
    Inventor: Dev Kumar Banerjee
  • Patent number: 8532948
    Abstract: A contactless sensing device comprises a magnetic stripe fixed on a tested object, a detector and a processor. The magnetic stripe has arranged plurality of N-pole and S-pole blocks. The detector includes a fixed magnetic layer with fixed magnetic direction, a free magnetic layer with changeable magnetic direction influenced by external magnetic field, and an insulating layer separated the fixed magnetic layer from the free magnetic layer. While the object is moving to make the magnetic stripe pass through the detector, the magnetic direction of the free magnetic layer is influenced by the N-pole and S-pole blocks, such that the magnetic direction of the free magnetic layer is parallel or anti-parallel to the fixed magnetic layer. The induced change of the magnetoresistance further result in the obvious change of the output signal to the processor, and then the information of the object is sensed and calculated from the processor.
    Type: Grant
    Filed: January 31, 2011
    Date of Patent: September 10, 2013
    Inventors: Geeng-Jen Sheu, San-Lin Young, Heng-Hui Chen, Shih-Hung Yeh
  • Patent number: 8400145
    Abstract: A balanced bridge variable-reluctance sensor with no internal circuit components, springs, or dielectric for performing vibration analysis in high-vibration, high-temperature, and other extreme environments. The present invention includes a variable-reluctance sensor in a vibration-sensing capacity. The present invention has inherently high reliability due to its simplicity. The sensor is solidly mounted to a structure that is being monitored and allows a vibration wave to pass through a floating sensor bridge. The sensor vibrates at the same frequency as the application being measured.
    Type: Grant
    Filed: July 6, 2010
    Date of Patent: March 19, 2013
    Assignee: Honeywell International Inc.
    Inventor: Mike Jacobs
  • Publication number: 20130063135
    Abstract: In a magnetic-field angle detection device and a rotation angle detection device in which the accuracy of the measured angle is not degraded even if the MR ratio of the tunneling magnetoresistance element is increased. In a magnetic-field-angle measurement apparatus including a magnetic-field-angle detection circuit and a magnetic sensor having a tunneling magnetoresistance element with a pinned magnetic layer, the magnetic-field-angle detection circuit has a power-supply unit that outputs a constant voltage as a bias voltage to the tunneling magnetoresistance element of the magnetic sensor and a current-detection unit that detects an output current of the tunneling magnetoresistance element.
    Type: Application
    Filed: May 14, 2010
    Publication date: March 14, 2013
    Inventors: Mutsumi Suzuki, Hiroshi Iwasawa, Masahiro Iwamura
  • Patent number: 8359942
    Abstract: A transmission actuator for a transmission includes a split sensor configured to detect a switching position of a split phase rod of the transmission that can be longitudinally displaced in a split sensor measuring direction. The transmission actuator further includes a gate sensor configured to detect a gate rod position of a gate rod of the transmission that can be longitudinally displaced in a gate sensor measuring direction, and a gear sensor configured to detect a gear rod position of a gear rod of the transmission that can be longitudinally displaced in a gear sensor measuring direction. Two measuring directions extend substantially parallel and span a measuring direction plane, and a third measuring direction forms an obtuse angle with the measuring direction plane.
    Type: Grant
    Filed: February 4, 2009
    Date of Patent: January 29, 2013
    Assignee: WABCO GmbH
    Inventors: Christian Brammer, Mike Heurich, Reiner Hölscher, Andreas Sievers, Tino Wiggers
  • Patent number: 8339125
    Abstract: A magnetic pole position detecting device correctly acquires magnetic pole position even if two magnetic sensors are arranged at an arbitrary interval. The magnetic pole position detecting device receives the input of sensor outputs “a” and “b” of two magnetic sensors arranged at a predetermined interval L along a magnetic pole arraying direction and a phase difference ? between the two sensor outputs “a” and “b”. When sin ?>?, the magnetic pole position detecting device divides a·sin ? by b?a·cos ? to calculate tan ? and outputs a magnetic pole position ?=tan?1 {a·sin ?/(b?a·cos ?)}. When sin ???, because a=sin ? and b=cos(?+?), the magnetic pole position detecting device outputs magnetic pole position ?={sin?1(a)+sin?1(b)??}/2. Because ?=2?×L/(a magnetic pole pitch or the number of poles), by using ? as a correction coefficient for the two sensor outputs “a” and “b”, magnetic pole position error can be canceled even when the interval L is different from a theoretical value.
    Type: Grant
    Filed: April 9, 2008
    Date of Patent: December 25, 2012
    Assignee: Mitsubishi Electric Corporation
    Inventors: Takemasa Arakawa, Shuya Sano
  • Patent number: 8294455
    Abstract: There is described an arrangement for detecting a change in a position between two parts which can be displaced in relation to one another. The arrangement has at least one electromechanical registering device having a monitoring chamber, which is shielded from manipulations taking effect from the outside, a number of monitoring bodies in the monitoring chamber, the number comprising at least two components and these components differing from one another in terms of a physical parameter, motion transfer means, which, in the event of the change in the positioning being returned to an initial state, cause the monitoring bodies to be moved from a first monitoring arrangement into a second monitoring arrangement. A sensor device has sensors which generate a sensor signal corresponding to the physical parameter of a monitoring body associated with each sensor in the first and second monitoring arrangement, and each sensor signal is fed to an evaluation unit.
    Type: Grant
    Filed: April 20, 2006
    Date of Patent: October 23, 2012
    Assignee: Siemens Aktiengesellschaft
    Inventor: Carsten Siebold
  • Publication number: 20120235672
    Abstract: Device for measuring the rotating angle of two objects rotating in relation to each other, with a transmitter which is assigned to one of the objects and which emits light that is either polarized or becomes polarized by means of a polarization filter, and with a polarization-sensitive analyzer such that the transmitter and the analyzer rotate relative to each other as dependent on the rotating angle, and with a receiver which measures the intensity of light passing through the analyzer in order to create a signal that is dependent on the rotating angle, where a magnetized element is positioned on one of the objects and a sensor for detecting a magnetic field is positioned on the other object.
    Type: Application
    Filed: February 13, 2012
    Publication date: September 20, 2012
    Applicant: SICK STEGMANN GMBH
    Inventor: Stefan BASLER
  • Publication number: 20120194175
    Abstract: The present invention is directed to a sensor with a body and a magnetic field sensor. The body includes a plurality of structures arranged in a first direction to effect a periodically varying magnetic field upon movement of the body in the first direction. The magnetic field sensor is configured to detect components of the magnetic field in a second direction and in a third direction, wherein the magnetic field sensor is arranged adjacent to the body such that the second direction is perpendicular to the first direction and such that the third direction is perpendicular to the first direction and to the second direction.
    Type: Application
    Filed: February 1, 2011
    Publication date: August 2, 2012
    Applicant: Infineon Technologies AG
    Inventor: Udo Ausserlechner
  • Patent number: 8228028
    Abstract: Methods for accurately tracking position and orientation of a magnetic-field sensor in a tracking volume when a large magnetic-field distorter is present in the tracking volume. In some of the methods, magnetic field data is collected from within the tracking volume both with and without the large magnetic-field distorter present in the tracking volume. This data is used to obtain correction information that is subsequently used during real-time operation of the magnetic-field sensor to correct the position and orientation solutions for the sensor for magnetic-field distortions caused by the presence of the large magnetic-field distorter in the tracking volume. Others of the methods involve modeling the large magnetic-field distorter using dipole and multipole modeling. Magnetic tracking systems for implementing the methods include hardware and software for carrying out the methods.
    Type: Grant
    Filed: December 4, 2009
    Date of Patent: July 24, 2012
    Assignee: Ascension Technology Corporation
    Inventor: Mark R. Schneider
  • Patent number: 8222895
    Abstract: A compact sensing device capable of sensing a rotational angle and a rotational velocity, or a rectilinear moving distance and a moving velocity. A displacement sensing device that senses a rotational angle of a moving member rotation and a distance of a linear movement of the moving member, or senses an angular velocity of the moving member rotation and a velocity of a linear movement of the moving member, includes: a first movable member, moved together with the moving member by a linear movement of the moving member; a second movable member holding the first movable member in a rotatable manner, and rotated together with the moving member by rotation of the moving member; a first sensor outputting a signal in accordance with a linear movement of the first movable member; and a second sensor outputting a signal in accordance with a rotation of the second movable member.
    Type: Grant
    Filed: January 11, 2008
    Date of Patent: July 17, 2012
    Assignees: Toyota Jidosha Kabushiki Kaisha, Panasonic Corporation
    Inventors: Norimi Asahara, Yukiko Nishida, Masahisa Niwa
  • Patent number: 8188730
    Abstract: An inductive proximity sensor and related method for sensing a presence/position of a target, with mounting effect compensation, are disclosed. In at least one embodiment, the method includes providing a proximity sensor having first and second coils that are both at least indirectly in communication with control circuitry. The method also includes receiving respective first and second signals at least indirectly indicative of respective first and second electromagnetic field components respectively experienced by the first coil as influenced both by a target and a structure supporting the sensor and the second coil as influenced by the supporting structure. The method further includes determining by way of the circuitry a third signal based at least in part upon the first signal, as modified based at least in part upon the second signal, whereby the third signal is indicative of the presence or position of the target relative to the sensor.
    Type: Grant
    Filed: September 10, 2008
    Date of Patent: May 29, 2012
    Assignee: Rockwell Automation Technologies, Inc.
    Inventors: Xiaofeng Gong, Wei S. Qian, Weihua Chen
  • Publication number: 20120007590
    Abstract: A balanced bridge variable-reluctance sensor with no internal circuit components, springs, or dielectric for performing vibration analysis in high-vibration, high-temperature, and other extreme environments. The present invention includes a variable-reluctance sensor in a vibration-sensing capacity. The present invention has inherently high reliability due to its simplicity. The sensor is solidly mounted to a structure that is being monitored and allows a vibration wave to pass through a floating sensor bridge. The sensor vibrates at the same frequency as the application being measured.
    Type: Application
    Filed: July 6, 2010
    Publication date: January 12, 2012
    Applicant: HONEYWELL INTERNATIONAL INC.
    Inventor: Mike Jacobs
  • Publication number: 20110316528
    Abstract: A position detection device includes a magnet and a magnetic detector. The magnet includes a first pole, a second pole, a third pole and a fourth pole. The first pole and the second pole are arranged spaced apart from each other and have a same magnetic polarity. The third pole and the fourth pole are arranged spaced apart from each other and have a magnetic polarity different from the magnetic polarity of the first pole and the second pole. The first pole faces the third pole. The second pole faces the fourth pole. The magnetic detector is configured to detect magnetism of the first pole, the second pole, the third pole, and the fourth pole.
    Type: Application
    Filed: September 13, 2011
    Publication date: December 29, 2011
    Applicant: NIKON CORPORATION
    Inventor: Tsuyoshi MATSUMOTO
  • Patent number: 8078098
    Abstract: A multi-path data dissemination method for a magnetic diffusion wireless network and a system thereof overcome environmental interferences in wireless data transmissions. Each node of the network is provided for figuring out its good neighbors by broadcasting a good-neighbor exploratory message in a bootstrap process. Each node keeps a good-neighbor table containing nodes with a RSSI higher than a threshold of the good-neighbor table. A magnetic field of a magnetic diffusion (MD) dissemination method capable of determining a data dissemination path is created according to the good-neighbor tables to ensure that the data can be forwarded to a data sink successfully.
    Type: Grant
    Filed: October 29, 2009
    Date of Patent: December 13, 2011
    Assignee: National Taiwan University
    Inventors: Polly Huang, Tsung-Han Lin, Shu-Yu Hu, Ting-Hao Chang, Shin-Lung Huang, I-Hei Wu, Seng-Yong Lau
  • Publication number: 20110298450
    Abstract: A circuit to detect a movement of an object provides a threshold selection module that uses one or more threshold signals identified prior to a present cycle of magnetic field signal in order to establish a threshold signal used for a present cycle of the magnetic field signal. A method associated with the circuit is also described.
    Type: Application
    Filed: June 4, 2010
    Publication date: December 8, 2011
    Applicant: Allegro Microsystems, Inc.
    Inventors: Andrea Foletto, Andreas P. Friedrich
  • Publication number: 20110246133
    Abstract: A rotation sensor includes: a magnetism generator; a sensor chip having a magneto-resistance element region and a Hall element region; and a detection circuit for detecting a relative rotation angle with reference to the magnetism generator according to output signals from each magneto-resistance element and each Hall element to detect. A phase difference is provided between output signals from the magneto-resistance elements. A phase difference is provided between output signals from the Hall elements. The magneto-resistance element region and the Hall element region at least partially overlap with each other. The detection circuit includes a comparison section, an angle computing section, and an output section. The comparison section compares an output level from each Hall element with a predetermined threshold value level, and provides a comparison result for each Hall element.
    Type: Application
    Filed: February 22, 2011
    Publication date: October 6, 2011
    Applicant: DENSO CORPORATION
    Inventors: Tomoyuki HARADA, Hirofumi Uenoyama, Takashi Ishikawa
  • Publication number: 20110127995
    Abstract: A rotation sensor fixed to a sensor fixing member with simplified fixing system and excellent in water proofing property and vibration proofing property is provided. The rotation sensor includes a sensor unit having a magnetic sensor element for detecting rotation of a to-be-detected element provided in a rotating ring, a cable for drawing an output signal of the sensor element to the outside, and a substrate with an electroconductive region for electrically connecting the sensor element and a core line of the cable while the sensor element and the cable are fitted to the substrate. The substrate has at least one recess portion or projection portion engageable with a projection portion or recess portion in the sensor fixing member to fix the sensor unit to the sensor fixing member. A molding segment formed by molding is provided for covering the sensor unit.
    Type: Application
    Filed: August 4, 2009
    Publication date: June 2, 2011
    Inventors: Kentarou Nishikawa, Toru Takahashi
  • Patent number: 7843191
    Abstract: A position-sensing system magnetically senses the position of a piston rod moving with respect to a cylinder. A magnetically hard layer on the piston rod provides a recording medium. A track comprised of a plurality of magnetized regions is magnetized in the magnetically hard layer. A plurality of magnetic-field sensors is coupled to the cylinder in proximity of the magnetically hard layer to sense the magnetized track while the piston rod is moving with respect to the cylinder. A first one of the magnetic field sensors is positioned over the track to sense the magnetized regions of the track serially and a second one of the magnetic field sensors is positioned radially to one side of the track. The magnetic field sensors generate signals, in response to sensing the magnetized regions, for use in measuring rotational movement of the piston rod.
    Type: Grant
    Filed: July 9, 2010
    Date of Patent: November 30, 2010
    Assignee: SRI International
    Inventors: Donald C. Arns, Pablo Garcia
  • Patent number: 7788079
    Abstract: A method and an apparatus for obtaining an equivalent circuit model of a multi-layer circuit are disclosed. The method includes simulating the multi-layer circuit using an electromagnetic field analysis to provide a coupling network; and simplifying the coupling network using a circuit model order reduction method to generate the equivalent circuit model. The method is very simple to implement and the equivalent circuit model obtained has an apparent physical meaning.
    Type: Grant
    Filed: May 5, 2006
    Date of Patent: August 31, 2010
    Assignee: Chinese University of Hong Kong
    Inventors: Ke-Li Wu, Jie Wang
  • Patent number: 7771121
    Abstract: The bearing assembly includes a rolling bearing including a rotatable raceway member and a stationary raceway member. This bearing assembly also includes a to-be-detected member carried by the raceway member and having a magnetic characteristic which cyclically varies in a direction circumferentially of the to-be-detected element and has a cycle matching with one complete rotation of the raceway member, a magnetic sensor unit carried by the raceway member in face-to-face relation with the to-be-detected member, and a magnetic detecting circuit to supply an electric power to the unit and to process an output signal from the unit to provide an output to an external circuit. The magnetic characteristic of the to-be-detected member represents a substantially sinusoidal waveform rising and falling more steeply than a sinusoidal waveform at a zero-crossing point.
    Type: Grant
    Filed: April 13, 2009
    Date of Patent: August 10, 2010
    Assignee: NTN Corporation
    Inventors: Takashi Koike, Tomomi Ishikawa
  • Patent number: 7761254
    Abstract: A machine having an operator interface for requesting an action from an actuator of the machine includes a movable component of the operator interface. The movable component is movable among at least two positions. One of a magnet and a Hall effect sensor is positioned to move in response to movement of the movable component. The other of the magnet and the Hall effect sensor has a stationary position relative to the movable component. A pulse width modulator is operably coupled to the Hall effect sensor for producing a first pulse width modulated signal. The first pulse width modulated signal is altered in response to movement of one of the Hall effect sensor and the magnet relative to the other. An electronic controller is in communication with the pulse width modulator and the actuator and is configured to actuate the actuator in response to evaluation of the first pulse width modulated signal.
    Type: Grant
    Filed: May 11, 2007
    Date of Patent: July 20, 2010
    Assignee: Caterpillar Inc
    Inventors: Stephen Fouts, Matthew Vande Wiele, Rex Glover, Curtis Johnson, Kenneth Her, Roger Obourn, Dan Shearer