Approach Or Retreat Patents (Class 324/207.26)
  • Patent number: 10527682
    Abstract: A system and method for detecting a magnetic field generated by a magnetic field source located in a circuit. A magnetometer array generates data regarding an activity of the source. A computing device executes a magnetic beamforming data processing program including a hybrid model which receives data generated by the array and detects the magnetic field generated by the source. The hybrid model is based on a weighted sum of contributions to the magnetic field, which include a first modelled magnetic field contribution generated by a current dipole aligned with an axis of the source, and a second modelled magnetic field contribution generated by a loop current flowing around the axis. Weighting factors are applied to the modelled fields, and then the weighted modelled fields are summed to produce the hybrid model. The weighting factors can be adjusted to emphasize the contribution of one modelled field over the other.
    Type: Grant
    Filed: September 27, 2018
    Date of Patent: January 7, 2020
    Assignee: Honeywell Federal Manufacturing & Technologies, LLC
    Inventor: Paul Jeffrey DeRego
  • Patent number: 10393909
    Abstract: The present invention features a unique system of interdependent methods to greatly improve data acquired via the Differential Target Antenna Coupling (“DTAC”) method, which transmits electromagnetic (“EM”) fields and measures the primary EM field and the secondary EM fields generated in subsurface targets. These new data correction techniques provide improvements, in orders of magnitude, to the measured DTAC response accuracy. This improvement allows for greater depth of investigation, improved target location, and enhanced target characteristics.
    Type: Grant
    Filed: October 11, 2017
    Date of Patent: August 27, 2019
    Assignee: Arizona Board of Regents on Behalf of the University of Arizona
    Inventor: Ben K. Sternberg
  • Patent number: 10338155
    Abstract: The present disclosure provides a magnetometer body and a three-axis Induction Magnetometer (IM) using the same. The magnetometer body comprises: a magnetic core structure with an H-shaped longitudinal section, having a middle portion being an elongated rod-shaped magnetic core and two end portions being disk-shape magnetic flux concentrators; and an induction coil evenly wounded around a perimeter of the magnetic core in the magnetic core structure. In the present disclosure, disk-shape magnetic flux concentrators are fixed on two ends of the elongated magnetic core to collect magnetic flux, which is equivalent to increasing a length-diameter ratio of the magnetic core, thereby breaking through a noise limit of a conventional IM in a limited space.
    Type: Grant
    Filed: March 5, 2014
    Date of Patent: July 2, 2019
    Assignee: INSTITUTE OF ELECTRONICS, CHINESE ACADEMY OF SCIENCES
    Inventors: Wanhua Zhu, Bin Yan, Leisong Liu, Guangyou Fang
  • Patent number: 10114082
    Abstract: A system and method for detecting a magnetic field generated by a magnetic field source located in a circuit. A magnetometer array generates data regarding an activity of the source. A computing device executes a magnetic beamforming data processing program including a hybrid model which receives data generated by the array and detects the magnetic field generated by the source. The hybrid model is based on a weighted sum of contributions to the magnetic field, which include a first modelled magnetic field contribution generated by a current dipole aligned with an axis of the source, and a second modelled magnetic field contribution generated by a loop current flowing around the axis. Weighting factors are applied to the modelled fields, and then the weighted modelled fields are summed to produce the hybrid model. The weighting factors can be adjusted to emphasize the contribution of one modelled field over the other.
    Type: Grant
    Filed: March 3, 2016
    Date of Patent: October 30, 2018
    Assignee: Honeywell Federal Manufacturing & Technologies, LLC
    Inventor: Paul Jeffrey Derego
  • Patent number: 10020147
    Abstract: Proximity switches include a hermetically sealed unit that can be used in harsh environments and under significant pressures, such as underwater and in nuclear power facilities, without having any parts that would require replacement or periodic maintenance. The proximity switches are preferably switches actuated by physical movement of a contact in response to changing magnetic forces. The switches are preferably disposed in a body tube optionally including a hermetic seal assembly to seal an open end of the body tube and/or a ferrule that prevents electrical wires attached to the switch inside the body tube from being pulled away from the switch. Further, the switches preferably maintain a contact pressure between electrical contacts sufficient to withstand acceleration seismic testing of 10 g with no contact discontinuity.
    Type: Grant
    Filed: June 13, 2016
    Date of Patent: July 10, 2018
    Assignee: General Equipment and Manufacturing Company, Inc.
    Inventors: Robert L. LaFountain, Gregory C. Merrifield
  • Patent number: 10007017
    Abstract: A proximity sensor core for a proximity sensor is provided. The core has a head portion extending across a width of the sheet of material and the head has a first length. First and second leg portions extend for a second length from the same edge of the head portion. Each of the first and second leg portions extend across a portion of the width of the head portion. First and second foot portions extend for a third length from the respective first and second leg portions. The first and second foot portions have the same width as the respective leg portions. The core has a first bend between each of the first and second foot portions and the respective first and second leg portions so that the first and second foot portions extend generally perpendicular to the respective first and second leg portions.
    Type: Grant
    Filed: November 14, 2014
    Date of Patent: June 26, 2018
    Assignee: Ultra Electronics Limited
    Inventors: Ian McGregor Stothers, Mark Alan McCray
  • Patent number: 10001540
    Abstract: Provided is a method for adapting the sensitivity of a sensor system, in particular of a capacitive sensor system, which provides a sensor signal, wherein a first lower threshold value is adapted, if the sensor signal fulfills a first switching threshold criterion, a first upper threshold value is adapted, if the sensor signal fulfills a second switching threshold criterion, and at least one switching threshold value is adapted such that the switching threshold value has a predetermined first distance from the first upper threshold value and/or a predetermined second distance from the first lower threshold value.
    Type: Grant
    Filed: October 10, 2012
    Date of Patent: June 19, 2018
    Assignee: MICROCHIP TECHNOLOGY GERMANY GMBH
    Inventors: Holger Erkens, Claus Kaltner, Holger Steffens
  • Patent number: 9939546
    Abstract: A detection method and detection device of buried metal which are capable of detecting singular points, in horizontal and vertical directions, of metal tubes, telecommunication cables, and electric power cables, or the like buried in the ground. A magnetic field component of the direction of 3 axes of a XYZ axis is detected by two or more magnetic sensors installed in the detectable direction, and detects a magnetic field induced to buried metal. While carrying out synchronous detection of these magnetic field components and calculating for each amplitude and each phase of a magnetic field component of the direction of 3 axes, image processing is carried out and it is outputted to a display. While calculating for the position of a singular point, a singular point distinguishes whether it is an over-crossing state, it is an under-crossing state, or it is a branched state from these image data.
    Type: Grant
    Filed: March 13, 2015
    Date of Patent: April 10, 2018
    Assignee: FUJI TECOM INC.
    Inventors: Masaru Tsunasaki, Kenshi Kubota
  • Patent number: 9869790
    Abstract: A locator device for generating buried asset data is disclosed. The device includes an elongated housing accommodating at least two sensors, wherein each sensor is for reading analog radio frequency (RF) signals from a buried asset, wherein the at least two sensors having a known distance between them, and wherein the housing may be oriented either horizontally or vertically, a sensing device for sensing an orientation of the elongated housing, and a processor for reading RF signals from the buried asset, applying an orientation filtering process to the signals based on the orientation, converting the signals into buried asset data having depth data, position data and electrical current data for a buried asset, and, a display unit for displaying the buried asset data in a graphical user interface, wherein the buried asset data corresponds to the RF signals that were read.
    Type: Grant
    Filed: February 13, 2017
    Date of Patent: January 16, 2018
    Inventor: Alan Haddy
  • Patent number: 9823092
    Abstract: A magnetic field sensor has a plurality of magnetic field sensing elements and operates as a motion detector for sensing a rotation or other movement of a target object.
    Type: Grant
    Filed: October 31, 2014
    Date of Patent: November 21, 2017
    Assignee: Allegro Microsystems, LLC
    Inventors: Paul A. David, William P. Taylor
  • Patent number: 9814212
    Abstract: The present invention concerns an electronic device, particularly for detecting and control the environment of an animal housing, such as a cage, thus being able to automatically detect and control animal's immediate environment. Furthermore, the present invention also concerns a system comprising such device or a plurality of devices, and a method for automatic detection of cage condition and presence. The device, the system and the method according to the present invention allow to detect the presence and several parameters of the cage environment without interfering with the inside of the cage.
    Type: Grant
    Filed: September 28, 2012
    Date of Patent: November 14, 2017
    Assignee: TECNIPLAST S.P.A.
    Inventors: Pietro Bernardini, Giovanni Malnati
  • Patent number: 9805241
    Abstract: A computer-implemented user interface method and apparatus are disclosed. A user input signal corresponding to a drawn gesture is received and sampled. If the input signal is orientation invariant, the sampled, spaced points are rotated in accordance with an indicative angle to generate an input vector. If the input signal is orientation sensitive, the sampled, spaced points are rotated to align with a base orientation to generate the input vector. The gesture is recognized based on a comparison of the input vector to a plurality of templates.
    Type: Grant
    Filed: December 18, 2012
    Date of Patent: October 31, 2017
    Assignee: Google Inc.
    Inventor: Yang Li
  • Patent number: 9733061
    Abstract: A distance measurement system includes a tank circuit including a transmit coil coupled to a transmit capacitor, a distance calculation circuit coupled to the transmit coil, and a target resonant circuit including a receive coil coupled to a receive capacitor. The receive coil is to receive a magnetic field generated by the tank circuit. The distance calculation circuit is to determine a reflected admittance. The reflected admittance includes a real component and an imaginary component. The distance calculation circuit is to determine a distance between the transmit and receive coils based on the imaginary component of the reflected admittance.
    Type: Grant
    Filed: July 29, 2015
    Date of Patent: August 15, 2017
    Assignee: TEXAS INSTRUMENTS INCORPORATED
    Inventor: Gianpaolo Lisi
  • Patent number: 9703001
    Abstract: An automatic recognition method includes the calculation of an error representative of the difference between an estimate of the values of the magnetometer measurements when the positions, orientations and amplitudes of the magnetic moments of the P dipoles are equal to those determined, and the values of the magnetometer measurements taken. There is the selection of another system of equations linking each measurement of a triaxial magnetometer to the position, orientation and amplitude of the magnetic moment of P? magnetic dipoles. The method includes the calculation of at least one distinctive feature of the object presented from the position, orientation, or amplitude of the magnetic moment of each dipole determined with the system of equations that minimizes the error calculated. The method includes the recognition of the magnetic object presented if the calculated distinctive features correspond to those of a known object, otherwise the lack of recognition of this object.
    Type: Grant
    Filed: November 12, 2013
    Date of Patent: July 11, 2017
    Assignee: Commissariat à l'énergie atomique et aux énergies alternatives
    Inventors: Tristan Hautson, Rabeb Aloui, Saifeddine Aloui, Timothée Jobert
  • Patent number: 9665888
    Abstract: A computer-implemented method of distributing targeted merchant electronic messages to a merchant's remote computer, comprising: receiving traveler information at a targeting messages application; receiving merchant information at the targeted messages module; receiving merchant preference information; determining which merchants to notify by comparing the merchant information and the merchant preference information to the traveler information to determine whether any travelers that have an interest in any products or services provided by the merchants are currently near or projected to be near any of the merchants; electronically transmitting merchant electronic messages to the merchant's remote computer; auditing expense reporting information for the travelers to determine whether at least one of the travelers complete a transaction with the merchant in response to a targeting prompted by the merchant electronic messages; and in response to determining that the at least one traveler completed the transactio
    Type: Grant
    Filed: October 23, 2013
    Date of Patent: May 30, 2017
    Assignee: CONCUR TECHNOLOGIES, INC.
    Inventors: Thomas Depasquale, John Love, Michael Lore, Michael Fredericks, Andrew Csontos
  • Patent number: 9645203
    Abstract: A magnetic field measuring device includes a first semiconductor body having a surface formed in a first x-y plane, the first semiconductor body having two magnetic field sensors, spaced a distance apart on the surface, and the magnetic field sensors each measuring one z component of a magnetic field. A first magnet has a planar main extension surface formed in a second x-y plane, the direction of magnetization changing from a north pole to a south pole along the main extension surface on a symmetry surface of the magnet. One of the two magnetic field sensors being disposed in the vicinity of the north pole and the other of the two magnetic field sensors being situated in the vicinity of the south pole, so that signals having opposite polarities with respect to each other are formed in a z component of the magnetic field.
    Type: Grant
    Filed: August 3, 2015
    Date of Patent: May 9, 2017
    Assignee: Micronas GmbH
    Inventors: Timo Kaufmann, Klaus Heberle, Joerg Franke, Oliver Breitwieser
  • Patent number: 9530957
    Abstract: A magnetic sensor includes magnetoresistive elements and a soft magnetic body. The magnetoresistive elements have multi layers including a magnetic layer and a nonmagnetic layer on a substrate, and exert a magnetoresistance effect. The soft magnetic body is electrically disconnected with the magnetoresistive elements, and converts a vertical magnetic field component from the outside into a magnetic field component in a horizontal direction so as to provide the magnetoresistive elements with the horizontally converted magnetic field component. The magnetoresistive elements have a pinned magnetic layer having a fixed magnetization direction and a free magnetic layer having a variable magnetization direction. The free magnetic layer is stacked on the pinned magnetic layer with a nonmagnetic layer interposed between the free magnetic layer and the pinned magnetic layer. The magnetization directions of the pinned magnetic layers of the magnetoresistive elements are the same direction.
    Type: Grant
    Filed: April 13, 2012
    Date of Patent: December 27, 2016
    Assignee: ALPS ELECTRIC CO., LTD.
    Inventors: Shinji Sugihara, Fumihito Koike, Yasushi Watanabe, Hideto Ando
  • Patent number: 9436934
    Abstract: Techniques for visual integration of meeting spaces within a calendar system are presented. A meeting room can be viewed via a map and selected for scheduling a meeting. The map depicts the location of the meeting room within a facility of an enterprise. A meeting scheduler visually sees the meeting room within the map and can select the meeting room and acquire details about the meeting room.
    Type: Grant
    Filed: July 31, 2014
    Date of Patent: September 6, 2016
    Assignee: Novell, Inc.
    Inventor: Jitender Bisht
  • Patent number: 9389260
    Abstract: An impedance analyzer is provided. The analyzer includes a signal excitation generator comprising a digital to analog converter, where a transfer function of the digital to analog converter from digital to analog is programmable. The impedance analyzer further includes a receiver comprising a low noise amplifier (LNA) and an analog to digital converter (ADC), where the LNA is a current to voltage converter; where the programmable digital to analog transfer function is implemented by a direct digital synthesizer (DDS) and a voltage mode digital to analog converter, or a digital phase locked loop (PLL), or both. Further, a multivariable sensor node having an impedance analyzer is provided. Furthermore, a multivariable sensor network having a plurality of multivariable sensor nodes is provided.
    Type: Grant
    Filed: September 28, 2012
    Date of Patent: July 12, 2016
    Assignee: General Electric Company
    Inventors: Radislav Alexandrovich Potyrailo, Jeffrey Michael Ashe, Sm Shajed Hasan, Naresh Kesavan Rao, Krishnakumar Sundaresan
  • Patent number: 9306498
    Abstract: A circuit for generating a modulated signal is disclosed. The circuit includes a constant current source. The circuit further includes a first switch that is coupled to the constant current source. The circuit also includes a second switch that is coupled to the first switch and a ground. The first switch and the second switch are coupled to a third switch. The third switch is coupled to a first integrated circuit pad. The first integrated circuit pad is defined to be used for coupling the third switch to a resonance circuit.
    Type: Grant
    Filed: February 13, 2014
    Date of Patent: April 5, 2016
    Assignee: NXP B.V.
    Inventor: Sven Simons
  • Patent number: 9281694
    Abstract: A wireless power receiver for receiving power from a wireless power transmitter using resonance according to the embodiment includes a reception resonant coil resonance-coupled with a transmission resonant coil of the wireless power transmitter for receiving the power, a reception induction coil coupled with the reception resonant coil for receiving the power, and a connecting unit, and the reception resonant coil includes at least one conductive line having one end and an opposite end being open with each other, and the connecting unit couples the one end and the opposite end of each conductive line with each other so that the reception resonant coil forms a closed loop.
    Type: Grant
    Filed: October 17, 2012
    Date of Patent: March 8, 2016
    Assignee: LG INNOTEK CO., LTD.
    Inventor: Jung Oh Lee
  • Patent number: 9272638
    Abstract: A sensor assembly configured to sense a position of a seat in a vehicle includes a housing defining a cavity and having an open end. The sensor assembly may also include a carrier removably disposed in the housing cavity via the open end, wherein a permanent magnet may be disposed within a magnet cavity defined in the carrier, wherein the permanent magnet may establish a magnetic field. The sensor assembly may further include a single pole disposed within a pole cavity defined in the carrier and spaced from the permanent magnet and positioned in the magnetic field. In addition, the sensor assembly may include a magnetic sensor element affixed to a printed circuit board (PCB) and positioned in the magnetic field and adjacent to an end of the single pole. The magnetic sensor element and PCB may be at least partially disposed within the cavity.
    Type: Grant
    Filed: March 17, 2011
    Date of Patent: March 1, 2016
    Assignee: Stoneridge Control Devices, Inc.
    Inventors: Karanjit Singh Saini, Gennady Baskin
  • Patent number: 9218548
    Abstract: A card reader for use with a card having magnetic data recorded thereon may include a magnetic head for carrying out at least one of reading the magnetic data recorded in the card and recording the magnetic data into the card; a card insertion part where an insertion slot for inserting the card is formed; a metal sensor structured to detect a foreign object, which contains a metallic material, having been installed around the card insertion part; and a control unit. The control unit may be structured to calculate the amount of change in an output value of the metal sensor, whenever a predetermined reference time period has passed, and judge that the foreign object has been installed around the card insertion part if the amount of change exceeds a predetermined reference value.
    Type: Grant
    Filed: October 21, 2014
    Date of Patent: December 22, 2015
    Assignee: NIDEC SANKYO CORPORATION
    Inventor: Keiji Hoson
  • Patent number: 9144470
    Abstract: A tracking system is provided for tracking an objects. A first and a second trackable member each have an inertial sensor unit producing at least orientation-based data. A processing unit receives the orientation-based data from the trackable members. The processing unit has an orientation calculator calculating an orientation of the second trackable member with respect to the first trackable member from the orientation-based data of both said trackable members, whereby the processing unit calculates an orientation of the objects. A method is also provided.
    Type: Grant
    Filed: March 25, 2009
    Date of Patent: September 29, 2015
    Assignee: ORTHOSOFT INC.
    Inventors: Catherine Proulx, Louis-Philippe Amiot, Yannick Boutin, Yonik Breton, Karine Duval, Benoît Pelletier, Alain Richard, Myriam Valin
  • Patent number: 9110103
    Abstract: A proximity sensor includes a relatively simple temperature compensation circuit, and includes a variable gain oscillator, a temperature sensor circuit, and a proximity determination circuit. The variable gain oscillator has a gain that varies with the proximity of a target to a sensor coil, generates an oscillating electrical signal having a substantially constant amplitude magnitude, and generates an energy signal representative of the electrical energy needed to sustain oscillations. The temperature compensation circuit senses proximity sensor temperature and supplies a temperature signal representative thereof, and the proximity determination circuit, based on the energy signal, supplies a proximity signal representative of target proximity to the sensor coil. The proximity determination circuit includes a comparator and a fixed resistor network. The comparator circuit supplies the proximity signal.
    Type: Grant
    Filed: February 19, 2013
    Date of Patent: August 18, 2015
    Assignee: HONEYWELL INTERNATIONAL INC.
    Inventor: John Kenneth Tillotson
  • Patent number: 9100062
    Abstract: Various embodiments relate to an antenna assembly for providing wireless coupling to a remote antenna. The antenna assembly comprises a first antenna and a second antenna. The second antenna is fixedly attached to a mount spaced by a distance along a first direction from the first antenna. The first antenna is configured to provide the wireless coupling along the first direction via transceiving of a time-varying field. The second antenna is configured to provide the wireless coupling by setting-up a decay of the time-varying field along the first direction. The interface is connected to an electric circuitry configured for controlling the transceiving. The second antenna is configured to operate as a passive electrical element.
    Type: Grant
    Filed: February 13, 2013
    Date of Patent: August 4, 2015
    Assignee: Harman Becker Automotive Systems GmbH
    Inventor: Armin Ganz
  • Patent number: 9089255
    Abstract: An endoscope system includes an endoscope having an insertion part capable of being be inserted into the interior of a living body; an extracorporeal device configured to be installed outside the living body, a first extracorporeal signal connection part having a second electrode electrically connected to the extracorporeal device, and a first scope-side signal connection part that has a first electrode electrically connected to the endoscope, is engaged with the first extracorporeal signal connection part, and has a tubular shape. The insertion part includes an observation part capable of observing a distal end side thereof. When engaged with the first scope-side signal connection part, the first extracorporeal signal connection part is at least partially disposed in an inner cylindrical space of the first scope-side signal connection part, and the second electrode and the first electrode are subjected to capacitive coupling.
    Type: Grant
    Filed: April 20, 2012
    Date of Patent: July 28, 2015
    Assignee: OLYMPUS CORPORATION
    Inventor: Shuichi Kato
  • Patent number: 8981767
    Abstract: Inductive sensor module comprising a coil arrangement and a carrier, on which electronic components are arranged, wherein the coil arrangement is arranged on a first side of the carrier and the electronic components are arranged on a second side of the carrier directed away from the first side.
    Type: Grant
    Filed: March 23, 2010
    Date of Patent: March 17, 2015
    Assignee: BALLUFF GmbH
    Inventors: Simon Mahler, Martin Kohler, Matthias Kohler, Michael Frauchiger, Christian Gnaegi
  • Patent number: 8943912
    Abstract: A proximity probe device for detecting rotating shaft deviation, wherein a rigid body has a pair of flat magnets for forcibly seating against a substantially flat surface area of a shaft bearing housing of magnetizable material, a threaded bore through the body for holding a proximity probe having a mating threaded casing, an angle indicator for assisting in placing the body on the surface area and a pair of spaced shoulders on a proximate edge surface of the body, wherein a sight plane for each of the shoulders is substantially tangential to the surface of a shaft in the shaft bearing housing to aid in aiming the probe at a desired location on the shaft surface.
    Type: Grant
    Filed: May 3, 2011
    Date of Patent: February 3, 2015
    Inventors: Ken E. Singleton, Barry T. Cease
  • Patent number: 8947076
    Abstract: Disclosed are systems and methods for effectively sensing rotational position of an object. In certain embodiments, a rotational position sensor can include a shaft configured to couple with the rotating object. The shaft can be configured to couple with a magnet carrier such that rotation of the shaft yields translational motion of the carrier. A magnet mounted to the carrier also moves longitudinally with respect to the axis of the shaft, and relative to a magnetic field sensor configured to detect the magnet's longitudinal position. The detected longitudinal position can be in a range corresponding to a rotational range of the shaft, where the rotational range can be greater than one turn. In certain embodiments, the rotational position sensor can include a programmable capability to facilitate ease and flexibility in calibration and use in a wide range of applications.
    Type: Grant
    Filed: January 18, 2010
    Date of Patent: February 3, 2015
    Assignee: Bourns, Inc.
    Inventors: Eugen Bogos, Perry Wehlman, Thanh Vinh Nguyen
  • Patent number: 8917089
    Abstract: A device for detecting metal elements in slab form such as metal plates or sheets, includes an emission coil powered by suitable control elements and generating a magnetic field, a reception coil placed so as to enable generation via induction of a voltage across the terminals of the coil under the action of the magnetic field, and elements for processing and evaluating the voltage signal delivered by the at least one reception coil, enabling delivery of an information signal indicating the absence or presence of one or more metal elements near the coils. The emission coil (3) and the reception coil (5) are both mounted in a housing or a sensor head having an active detection face having an associated detection region, and are positioned at a defined inclination one relative to the other and relative to the face.
    Type: Grant
    Filed: May 10, 2011
    Date of Patent: December 23, 2014
    Assignee: Senstronic (Societe par Actions Simplifiee)
    Inventor: Rémy Kirchdoerffer
  • Patent number: 8890512
    Abstract: A device for visually indicating a change in the operational state of a proximity sensor. The device includes a transparent housing having a cavity and a magnet device for generating a magnetic field. In addition, a sleeve is attached to the housing. The magnet device is concealed within the sleeve in a first position to indicate a first operational state. When a target is positioned adjacent the sensor end, magnetic attraction occurs between the target and the magnet device due to the magnetic field to cause movement of the magnet device to a second position within the cavity wherein the magnetic field does not act on the proximity sensor to change the operational state from the first operational state to a second operational state. Further, the magnet device is visible in the second position to indicate the second operational state.
    Type: Grant
    Filed: June 8, 2011
    Date of Patent: November 18, 2014
    Assignee: Pentair Flow Services AG
    Inventors: Leo Minervini, Kevin Connell
  • Patent number: 8884616
    Abstract: Embodiments relate to xMR sensors, in particular AMR and/or TMR angle sensors with an angle range of 360 degrees. In embodiments, AMR angle sensors with a range of 360 degrees combine conventional, highly accurate AMR angle structures with structures in which an AMR layer is continuously magnetically biased by an exchange bias coupling effect. The equivalent bias field is lower than the external rotating magnetic field and is applied continuously to separate sensor structures. Thus, in contrast with conventional solutions, no temporary, auxiliary magnetic field need be generated, and embodiments are suitable for magnetic fields up to about 100 mT or more. Additional embodiments relate to combined TMR and AMR structures. In such embodiments, a TMR stack with a free layer functioning as an AMR structure is used. With a single such stack, contacted in different modes, a high-precision angle sensor with 360 degrees of uniqueness can be realized.
    Type: Grant
    Filed: June 22, 2011
    Date of Patent: November 11, 2014
    Assignee: Infineon Technologies AG
    Inventors: Juergen Zimmer, Klemens Pruegl
  • Patent number: 8878550
    Abstract: A sensor device is provided. The sensor device includes a sensor pad for detecting an object in a detection area by measuring the impedance variation of the sensor pad, the sensor device further including a back focus plate disposed behind the sensor pad relative to the detection area and a first surrounding focus plate arranged around the sensor pad. The sensor device includes a signal generator that drives the sensor pad and the focus plates with a first set of signals having a predetermined constant phase, frequency and voltage amplitude. The sensor device further comprises at least a second surrounding focus plate arranged around the first surrounding focus plate, the second surrounding focus plate being driven with a second set of signals that are different from the first set of signals feeding the sensor pad.
    Type: Grant
    Filed: October 17, 2008
    Date of Patent: November 4, 2014
    Assignee: Faurecia Bloc Avant
    Inventors: Jean-Marcel Aubry, Thomas W Bach
  • Patent number: 8829894
    Abstract: A control device is provided configured to provide user control signals. The control device comprises a magnetic flux sensing unit configured to provide two-dimensional angular orientation information with respect to a magnetic field acting on the magnetic flux sensing unit, and the user control signals are dependent on the two-dimensional angular orientation information. The control device further comprises a magnet arrangement comprising at least two permanent magnets configured to generate the magnetic field. The magnet arrangement and the magnetic flux sensing unit are arranged to be reoriented relative to one another within a predetermined range of movement, and the at least two permanent magnets are arranged relative to the magnetic flux sensing unit such that the magnetic field experienced by the magnetic flux sensing unit is substantially uniform throughout the predetermined range of movement.
    Type: Grant
    Filed: June 24, 2011
    Date of Patent: September 9, 2014
    Assignee: Penny & Giles Controls Limited
    Inventors: Dev Kumar Banerjee, Charles Edward Downs
  • Patent number: 8823367
    Abstract: In a rotation angle detection apparatus, a signal detected by a magnetoresistive element is digitalized before being subjected to subtraction of the optimum correction parameter therefrom in a subtractor, the optimum correction parameter being stored in advance in a memory. Note that during the initial transmission at the time of activation, the data size “n” of a detection target obtained by a CPU from a control device is transferred to the memory, so that the optimum correction parameter for the data size of the detection target is selected. With the above, the detection unit can relatively readily cope with a request for enlargement or the like of a through hole size made by a machine side, and detection accuracy is not deteriorated and an error in absolute position processing is reduced when the curvature of the detection target is changed.
    Type: Grant
    Filed: June 22, 2011
    Date of Patent: September 2, 2014
    Assignee: Okuma Corporation
    Inventor: Noriyuki Fukui
  • Patent number: 8803513
    Abstract: An apparatus including a controller, a workpiece transport in communication with the controller having a movable portion and a transport path, and a multi-dimensional position measurement device including at least one field generating platen attached to the movable portion and at least one sensor group positioned along the transport path and in communication with the controller, the field generating platen is configured for position measurement and propelling the movable portion, each sensor in the at least one sensor group is configured to provide but one output signal along a single axis corresponding to a sensed field generated by the at least one field generating platen and the controller is configured calculate a multi-dimensional position of the movable portion based on the but one output signal of at least one of the sensors in the at least one sensor group, the multi-dimensional position including a planar position and a gap measurement.
    Type: Grant
    Filed: March 5, 2012
    Date of Patent: August 12, 2014
    Assignee: Brooks Automation, Inc.
    Inventors: Martin Hosek, Christopher Hofmeister, John F. Zettler, Alexander Krupyshev, Sergei Syssoev, Krzystof Majczak
  • Patent number: 8779778
    Abstract: Disclosed is a proximity switch provided with an actuator unit and a sensor unit. The sensor unit is provided with an antenna coil, a transmitting circuit which transmits electromagnetic waves at a constant frequency to the antenna coil, a receiving circuit which detects external signals received by means of the antenna coil, and control circuits. The actuator unit is provided with an antenna coil, a power supply circuit which rectifies an electromotive force generated in the antenna coil, and a signal processing circuit which receives power supply from the power supply circuit, performs frequency-dividing to the signals received by means of the antenna coil, and transmits the signals from the antenna coil after the frequency-dividing. The control circuit of the sensor unit has memory for registering the frequency of the signals transmitted from the actuator unit.
    Type: Grant
    Filed: April 27, 2010
    Date of Patent: July 15, 2014
    Assignee: OMRON Corporation
    Inventors: Toshiyuki Higuchi, Teruyuki Nakayama, Daichi Kamisono, Satoshi Nishiuchi, Kazunori Okamoto
  • Patent number: 8781739
    Abstract: Systems and methods for using magnetic field readings to refine device location estimates are provided. As an example, a plurality of magnetic field readings can be collected by a device as it travels along a path. A positioning system (e.g., GPS) or other sensors can be used to provide a coarse location for the device at each reading. A contribution to each of the magnetic field readings by the Earth's magnetic field can be removed to obtain a plurality of residual readings and a plurality of regions of interest along the path can be identified based at least in part on the residual readings. The regions of interest can be compared to each other to identify a plurality of correspondences between magnetic field readings or residual readings and the plurality of correspondences can be used to refine the location estimates.
    Type: Grant
    Filed: December 9, 2013
    Date of Patent: July 15, 2014
    Assignee: Google Inc.
    Inventor: Christian Miller
  • Patent number: 8754640
    Abstract: A magnetic field sensor can provide an output signal indicative of a passing condition or a failing condition of the magnetic field sensor. The output signal has one of a variety of output signal formats.
    Type: Grant
    Filed: June 18, 2012
    Date of Patent: June 17, 2014
    Assignee: Allegro Microsystems, LLC
    Inventors: Ravi Vig, P. Karl Scheller, Devon Fernandez, Christine Graham, Paul David
  • Patent number: 8723509
    Abstract: Magnetic tracking systems and methods for determining the position and orientation of a remote object. A magnetic tracking system includes a stationary transmitter for establishing a reference coordinate system, and at least one receiver. The remote object is attached to, mounted on, or otherwise coupled to the receiver. The transmitter can include a set of three mutually perpendicular coils having a common center point, or a set of three coplanar coils with separate centers. The receiver can include a set of three orthogonal coils. The position and orientation of the receiver and the remote object coupled thereto is determined by measuring the nine mutual inductances between the three transmitter coils and the three receiver coils. The magnetic tracking system provides reduced power consumption, increased efficiency, digital compensation for component variation, automatic self-calibration, automatic synchronization with no connections between transmitter and receiver, and rapid low-cost implementation.
    Type: Grant
    Filed: May 21, 2013
    Date of Patent: May 13, 2014
    Assignee: Brown University
    Inventors: William R. Patterson, III, Harvey F. Silverman, Kenneth J. Silverman
  • Patent number: 8710828
    Abstract: A system senses the position of a movable element in a mechanical apparatus. The element moves along an elongated guide member, which is at least partially formed of a magnetic material. An excitation coil is positioned by the guide member and a sensing coil moves with the movable element. An excitation circuit energizes the excitation coil and a position sensing circuit sense a voltage or current in the sensing coil to determine the distance between the coils.
    Type: Grant
    Filed: December 1, 2010
    Date of Patent: April 29, 2014
    Inventor: David Meisel
  • Patent number: 8542006
    Abstract: A solenoid current monitoring circuit of a solenoid actuator includes a solenoid drive board configured to receive a control signal, a sensing resistor configured to detect a current signal of a solenoid coil of the actuator resulting from the control signal, and a differentiator configured to differentiate the current signal. The solenoid current monitoring circuit detects the movement of the solenoid actuator based on a change in the differentiated current signal caused by a change in inductance of the solenoid coil.
    Type: Grant
    Filed: December 16, 2008
    Date of Patent: September 24, 2013
    Assignee: Hydril USA Manfacturing LLC
    Inventor: Zhen Liu
  • 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: 8508219
    Abstract: There is provided an apparatus and method for identifying and measuring the electric field strength which occurs from each of RFID tags arranged in a detection target space by a receiver to grasp the state of an object. The apparatus is provided with m (m>=1) electromagnetic field generation means provided near a space, the space being occupied by the object when the object is in a particular state; n (n>=1) electric field strength measurement means for identifying and measuring electric field strength which occurs from each of the m electromagnetic field generation means; characteristic extraction means for calculating characteristics from m×n time-series data of the electric field strength; and state identification means for identifying, by statistical processing, a state from the characteristics and characteristic data in each state for learning.
    Type: Grant
    Filed: April 28, 2009
    Date of Patent: August 13, 2013
    Assignee: National Institute of Advanced Industrial Science and Technology
    Inventors: Ryosaku Kaji, Mitsuaki Shimizu, Kiyomi Hirota
  • Patent number: 8502529
    Abstract: Provided is a magnetic sensor device capable of suppressing a variation in determination for detection or canceling of a magnetic field intensity, which is caused by noise generated from respective constituent elements included in the magnetic sensor device and external noise, to thereby achieve high-precision magnetic reading. The magnetic sensor device includes: a first D-type flip-flop and a second D-type flip-flop each having an input terminal connected to an output terminal of a comparator; an XOR circuit having a first input terminal and a second input terminal which are connected to an output terminal of the first D-type flip-flop and an output terminal of the second D-type flip-flop, respectively; a selector circuit; and a third D-type flip-flop having an input terminal connected to an output terminal of the selector circuit.
    Type: Grant
    Filed: November 30, 2010
    Date of Patent: August 6, 2013
    Assignee: Seiko Instruments Inc.
    Inventors: Daisuke Muraoka, Minoru Ariyama, Tomoki Hikichi, Manabu Fujimura
  • Patent number: 8461831
    Abstract: The invention provides a method and system for monitoring the flow of ore in block cave mining operations by inserting an active magnetic beacon 1 into an ore body 22 and generating an alternating magnetic signal with the beacon 1. The ore is monitored with a magnetometer (14, 15, 16, 17, 18) to detect the magnetic flux emitted by the beacon 1 thereby determining a position of the beacon. Successive recordings of the position of the magnetic beacon are taken as it moves along with the ore as it “caves”. In this way, flow patterns of the ore may be revealed.
    Type: Grant
    Filed: September 13, 2011
    Date of Patent: June 11, 2013
    Assignee: CMTE Development Limited
    Inventors: Barend Jacobus Pienaar, Paul J. A. Lever
  • Patent number: 8416076
    Abstract: A magnetic proximity sensor is attached to a ferrous object such that the sensor alerts a practitioner if a threshold of magnetic strength has been exceeded by bringing the ferrous object within a certain proximity to the magnet of an MRI scanner. The magnetic proximity sensor includes at least one magnetic field sensor for sensing a magnetic field strength. An alarm in communication with the field sensor alerts a practitioner that a threshold of magnetic strength has been exceeded. A battery powers the field sensor and the alarm. The field sensor may produce an output voltage corresponding to the sensed magnetic field strength, and a potentiometer may provide a reference voltage corresponding to a threshold magnetic field strength. A comparator compares the reference voltage to the output voltage, and triggers an alarm if the output voltage exceeds the reference voltage.
    Type: Grant
    Filed: April 2, 2009
    Date of Patent: April 9, 2013
    Assignee: The Trustees of Dartmouth College
    Inventors: Alexander Mamourian, Michael Holland
  • Patent number: 8390449
    Abstract: A intrusion detection system includes a first sensor device having a first transmission circuit unit that transmits a modulation wave of a first transmission spectrum diffusion signal to a first transmission leakage transfer passage and a second sensor device having a second transmission circuit unit that transmits a modulation wave of a second transmission spectrum diffusion signal to a second transmission leakage transfer passage. The signal interval of the first transmission spectrum diffusion signal is the same as the signal interval of the second transmission spectrum diffusion signal. The first transmission spectrum diffusion signal and the second transmission spectrum diffusion signal are shifted in frequency so that the first transmission spectrum diffusion signal does not overlap with the second transmission spectrum diffusion signal.
    Type: Grant
    Filed: August 6, 2010
    Date of Patent: March 5, 2013
    Assignee: Mitsubishi Electric Corporation
    Inventors: Akihiro Toyohara, Keisuke Morita
  • Patent number: 8378667
    Abstract: A pipeline pig signal made according to this invention houses one or more shielded magnetometer sensors and a microcontroller with adaptive thresholding detection means for reducing the likelihood of false alarms. The adaptive thresholding detection means removes outlier data from the magnetic flux data stream and then passes the outlier-free data stream through four low pass filters. A smoothed magnitude of the data stream is compared to detection limits and, if a passage event has occurred, a recent detection is indicated, a counter of a display unit is incremented, a time of passage is recorded, and both statistics are displayed on the display unit. Because a single object may produce multiple magnetic fields, the detector may be locked-out for a predetermined period of time after the passage event to prevent a second detection of the same object as it passes the detection device.
    Type: Grant
    Filed: May 22, 2009
    Date of Patent: February 19, 2013
    Assignee: TDW Delaware Inc.
    Inventors: Stephen J. Miska, William J. Rankin, Matthew W. Logan, Mark G. Register, Eric N. Freeman, Philip M. Maltby, Lloyd N. Salsman