Nonparallel Plural Magnetic Sensors Patents (Class 324/247)
  • Patent number: 10806521
    Abstract: An electromagnetic device includes a jig and multiple wires. The jig includes a center member and coil-separating blocks. The coil-separating blocks protrude from the center member and are separated from each other to provide a coil channels. Each of the wires is wrapped on the jig, around the center member, and in one of the coil channels to form one of a multiple coils. Each of the coils is configured to connect to an electromagnetic navigation system and generate respective electromagnetic fields to be emitted relative to a subject.
    Type: Grant
    Filed: October 31, 2016
    Date of Patent: October 20, 2020
    Assignee: Medtronic Navigation, Inc.
    Inventors: Andrew Wald, Bruce M. Burg, Steven L. Hartmann, Brad Jacobsen, Jeffrey Swetnam
  • Patent number: 10809096
    Abstract: A device comprises a magnetoresistive sensor configured to generate a signal indicative of an angular position of a magnetic field, the signal having an angular range of 180 degrees, and a differential Hall sensor pair comprising a first Hall sensor and a second Hall sensor. The differential Hall sensor pair is configured to generate a signal indicative of a polarity of the magnetic field. A second differential Hall sensor pair can also be used. The second differential Hall sensor pair is configured to generate a signal indicative of a polarity of the magnetic field.
    Type: Grant
    Filed: November 2, 2015
    Date of Patent: October 20, 2020
    Assignee: Honeywell International Inc.
    Inventor: Anthony J. Bussan
  • Patent number: 10802586
    Abstract: Multiple magnetic field generators have predetermined positions relative to a wearable device, such as a glove, and emit magnetic fields. Additionally, one or more magnetic field sensors are positioned on locations of the wearable device. A magnetic field sensor generates an output signal based on magnetic fields emitted by the magnetic field generator and detected by the magnetic field sensor. From the output signal and the predetermined positions of the magnetic field generators relative to the wearable device, a position and an orientation of the magnetic field sensor in a global coordinate system is determined. In some embodiments, a trained machine learning model is employed in conjunction with trilateration to obtain the position and orientation of the magnetic field sensor from its output signal.
    Type: Grant
    Filed: October 30, 2018
    Date of Patent: October 13, 2020
    Assignee: Facebook Technologies, LLC
    Inventor: Yi Zhao
  • Patent number: 10788342
    Abstract: The present disclosure relates to a magnetic field sensor including at least one magnetic field sensor element configured to generate a first sensor signal in response to a magnetic field, at least one Hall sensor element configured to generate a second sensor signal in response to the magnetic field and a compensation logic configured to compensate one of the first and the second sensor signal using a respective other one of the first and the second sensor signal. In some embodiments, the at least one Hall sensor element can be vertical Hall sensor and can be arranged in a predetermined orientation.
    Type: Grant
    Filed: May 12, 2017
    Date of Patent: September 29, 2020
    Assignee: Infineon Technologies AG
    Inventor: Bernd Koller
  • Patent number: 10753987
    Abstract: A detector access chamber (10) for a wireless directional detector (40), comprises a hollow body (12) having an open a upper end (20) and a lower end (24) at an opposing end, a lid (16) engageable with the open upper end (20) of the body (12) and preferably adapted to accommodate at least a 40 tonne vehicular load, and a detector holder (38) within the body (12) to hold a wireless directional detector (40). In use, the lid (16) and the detector holder (38) together define a volume adapted to constrain internal reorientation of the wireless directional detector (40) caused by vibrations. A submergible detector system (42) is also provided.
    Type: Grant
    Filed: October 14, 2016
    Date of Patent: August 25, 2020
    Assignee: NAL Limited
    Inventors: Michael McGee, Feargal O'Connell
  • Patent number: 10677857
    Abstract: A system and method for an improved magnetic sensor for use as a three three-axial sensor (TAS) is disclosed. The TAS provides an optimal sensor, concentric and the three coils are identical, with higher sensitivity resulting, a plurality of layers. More specifically, the sensor is made of multiple layers of printed circuit board (PCB). The multiple PCB layers are stacked according to various geometric shapes to create a sensor that enhances positional awareness. Concentric sensors may be arranged in a cube, stacked squares, or stacked squares decreasing in size to form a pyramid structure.
    Type: Grant
    Filed: December 15, 2017
    Date of Patent: June 9, 2020
    Assignee: Biosense Webster (Israel) Ltd.
    Inventors: Matityahu Amit, Eden Kidishman
  • Patent number: 10545196
    Abstract: A magnetic field sensor for sensing an external magnetic field along a sensing direction comprises a sensor bridge. The sensor bridge has a first sensor leg that includes a first magnetoresistive sense element and a second sensor leg that includes a second magnetoresistive sense element. The first and second sense elements have respective a first and second pinned layers having corresponding first and second reference magnetizations. The second reference magnetization is oriented in an opposing direction relative to the first reference magnetization. The first and second sense elements have respective first and second sense layers, each having an indeterminate magnetization state. A permanent magnet layer is proximate the magnetoresistive sense elements. In the absence of an external magnetic field, the permanent magnet layer magnetically biases the indeterminate magnetization state of each sense layer in an in-plane orientation to produce a sense magnetization of the first and second sense layers.
    Type: Grant
    Filed: March 24, 2016
    Date of Patent: January 28, 2020
    Assignee: NXP USA, Inc.
    Inventors: Paige M. Holm, Lianjun Lu
  • Patent number: 10547218
    Abstract: A novel variable magnetic monopole field electro-magnet and inductor with equal and stable high density magnetic field winding system for use in any AC-DC electric motor and generator or in any AC transformer including interleaved ferromagnetic supportive cores positioned between the layers of windings.
    Type: Grant
    Filed: July 20, 2017
    Date of Patent: January 28, 2020
    Assignee: Quantakinetic Technologies, LLC
    Inventor: Dumitru Bojiuc
  • Patent number: 10514430
    Abstract: In one general aspect, a system includes a material including a surface, and a magnetic sensor configured to sense a first component and a second component of a magnetic field. The first component of the magnetic field may be orthogonal to the second component of the magnetic field. The magnetic sensor may include a first sense element included on a first angled surface sloping in a first direction relative to the surface of the material, a second sense element included on a second angled surface sloping in the first direction, and a third angled surface sloping in a second direction different from the first direction where the third angled surface can be disposed between the first angled surface and the second angled surface and can exclude a sense element.
    Type: Grant
    Filed: October 9, 2017
    Date of Patent: December 24, 2019
    Assignee: Fairchild Semiconductor Corporation
    Inventor: Phil Mather
  • Patent number: 10502855
    Abstract: A marker for remote localisation in a medium, the marker including a magnetic field sensor configured to measure three different magnetic fields at three different respective times in three dimensions at a marker location in the medium, wherein the marker is configured to generate measurement data representing the measured magnetic fields for determining the marker location.
    Type: Grant
    Filed: March 23, 2015
    Date of Patent: December 10, 2019
    Assignees: Orica International Pte Ltd, Commonwealth Scientific & Industrial Org
    Inventors: Rodney Appleby, Alexander Theofile Spathis, Kyle Blay, Keith Leslie, Marcel Bick, Byron Wicks
  • Patent number: 10473449
    Abstract: A single-chip off-axis magnetoresistive Z-X angle sensor and measuring instrument. The single-chip off-axis magnetoresistive Z-X angle sensor comprises a substrate located on an X-Y plane, at least one X-axis magnetoresistive sensor and at least one Z-axis magnetoresistive sensor, the X-axis magnetoresistive sensor and the Z-axis magnetoresistive sensor being located on the substrate. The X-axis magnetoresistive sensor and the Z-axis magnetoresistive sensor each comprise magnetoresistive sensing units and a flux concentrator, the magnetoresistive sensing units being electrically connected into a magnetoresistive bridge comprising at least two bridge arms. The Z-axis magnetoresistive sensor is a push-pull bridge structure, a push arm and a pull arm of the push-pull bridge structure being respectively located at positions equidistant from a Y-axis central line of the flux concentrator.
    Type: Grant
    Filed: August 18, 2015
    Date of Patent: November 12, 2019
    Assignee: MultiDimension Technology Co., Ltd.
    Inventors: James Geza Deak, Zhimin Zhou
  • Patent number: 10459105
    Abstract: A system for locating an underground line. The system uses a self-propelled autonomous antenna, processor and propulsion system. The antenna detects a magnetic field from an underground line and generates an antenna signal. The processor is programmed to receive the antenna signal and generate a command signal. The propulsion system receives the command signal and moves the antenna along a length of the underground line, allowing the processor to map the same.
    Type: Grant
    Filed: May 24, 2017
    Date of Patent: October 29, 2019
    Assignee: The Charles Machine Works, Inc.
    Inventors: Scott B. Cole, Brian K. Bailey, Larry G. Morse
  • Patent number: 10429534
    Abstract: A tool, method and system for ranging between two wellbores. The target wellbore includes a conductive member disposed within a portion of the target wellbore. An investigative wellbore includes an electromagnetic gradiometer positioned within the wellbore, as well as emitter electrode and return electrode spaced apart along an investigative wellbore, preferably in the process of being drilled. The position of the emitter electrode and the return electrode are selected to optimize current transmission to the target wellbore in order to enhance the electromagnetic field emanating from the conductive member at a desired point along the conductive member. Where the electrodes and gradiometer are carried by a drill string, gap subs are positioned along the drill string to minimize conduction of current along the drill string therebetween. In some embodiments, the gradiometer is positioned between the emitter and return electrodes.
    Type: Grant
    Filed: December 6, 2013
    Date of Patent: October 1, 2019
    Assignee: Halliburton Energy Services, Inc.
    Inventors: Burkay Donderici, Clinton Moss, Mac Upshall
  • Patent number: 10408854
    Abstract: A sensor arrangement for measuring a speed of a rotating component includes a rotary encoder and sensor unit. The encoder is coupled to the component, and has a magnetic surface code with alternating North and South poles. The sensor unit has a housing, connecting cable, at least one sensitive measuring element, and contacting arrangement. The element is positioned in the sensor unit such that a main detection direction of the element is angled relative to a main extension direction of the sensor unit. The contacting arrangement electrically connects the element to the cable within the housing. Rotational movement of the encoder changes a magnetic field generated by the code at the element, which is configured to detect the change over a first direction parallel to the main extension direction or over a second direction perpendicular to the main extension direction in order to determine the speed of the component.
    Type: Grant
    Filed: February 12, 2016
    Date of Patent: September 10, 2019
    Assignee: Robert Bosch GmbH
    Inventor: Bernd Tepass
  • Patent number: 10385964
    Abstract: Embodiments provide systems and methods for determining a position of a gear shift lever of a vehicle. A ferromagnetic target object having selected characteristics influences a magnetic field generated by a back bias magnet. A magnetic field sensor includes magnetic field sensing elements disposed proximate to the target object. Each magnetic field sensing element generates an electronic signal in response to sensed magnetic fields. The gear shift lever moves among a plurality of gears of the vehicle. The magnetic field sensor selects a set of the magnetic field sensing elements to determine a magnetic field difference based on a difference of amplitudes between the electronic signals that is related to a current position of the gear shift lever. Characteristics of the target object enable the magnetic field sensor to detect the position of the gear shift lever. The characteristics include edges proximate to a perimeter of the target object.
    Type: Grant
    Filed: June 8, 2016
    Date of Patent: August 20, 2019
    Assignee: Allegro MicroSystems, LLC
    Inventors: Yannick Vuillermet, Cédric Gillet, Andrea Foletto, Andreas P. Friedrich
  • Patent number: 10310071
    Abstract: A system and method for measuring the complex resistivity of a ground section. One embodiment utilizes stand-off capacity-coupled resistivity (CCR) sensing to inject current into the ground at a frequency within the range of 1 Khz to 1 MHz. A sensor detects the voltage which is used to determine the complex resistively of the ground and, thus, ground content. The system and method permits surveys to be conducted at speeds of 10-20 mph or more. Alternatively, current is injected into the ground along a plasma channel that is enabled with a high energy laser. Alternatively, an alpha particle generator may be used to inject the current. Multiple frequencies may be used within the range of 1 KHz to 1 MHz to produce an impedivity spectroscopy to thereby determine and/or display a map of ground content.
    Type: Grant
    Filed: September 16, 2008
    Date of Patent: June 4, 2019
    Assignee: The United States of America as represented by the Secretary of the Army
    Inventors: David Mark Hull, Gregory Alton Holifield
  • Patent number: 10309992
    Abstract: Apparatus and associated methods relate to a measurement system that calculates a current in a conductor based on an odd-order spatial derivative function of signals representing magnetic-field strengths within a hole in the conductor. In an illustrative embodiment, the odd-order spatial derivative function may generate an output signal representing a spatial derivative of the in-hole magnetic field greater than the first-order. The three or more magnetic-field sensors may be configured to align on the hole's axis when inserted into the hole. When inserted into the hole, the sensors may be aligned on an axis perpendicular to a direction of current flow and be responsive to a magnetic-field directed perpendicular to both the direction of current flow and the aligned axis. Some embodiments may advantageously provide a precise measurement indicative an electrical current in the electrical conductor while substantially rejecting a stray magnetic field originating from an adjacent electrical conductor.
    Type: Grant
    Filed: March 26, 2014
    Date of Patent: June 4, 2019
    Assignee: Honeywell International Inc.
    Inventors: Andy Peczalski, Bharat B. Pant
  • Patent number: 10274507
    Abstract: A magnetic sensor module includes a magnetic sensor having an in-plane axis and an out-of-plane axis, and including a differential pair of sensor elements spaced apart from each other. The differential pair of sensor elements are configured to generate measurement values in response to sensing a bias magnetic field. The magnetic sensor module further includes a back bias magnet including two opposing poles, where the back bias magnet is magnetized in a magnetized direction that is parallel to the in-plane axis and generates the bias magnetic field; a first magnetic flux guide disposed at a first pole and configured to redirect a first portion of the bias magnetic field towards the magnetic sensor along the in-plane axis; and a second magnetic flux guide disposed at a second pole and configured to redirect a second portion of the bias magnetic field towards the back bias magnet along the magnetized direction.
    Type: Grant
    Filed: March 1, 2018
    Date of Patent: April 30, 2019
    Assignee: Infineon Technologies AG
    Inventor: Gernot Binder
  • Patent number: 10191123
    Abstract: A magnetic field measurement device capable of accurate measurement of a magnetic field even after a sensitivity of an MI sensor varies is provided. A magnetic field measurement device (1) includes an MI sensor (2) and a sensitivity calculation means (3). The MI sensor (2) includes a magneto-sensitive body (20), a detection coil (21) and a magnetic field generation coil (22) that generates a magnetic field upon energization. The sensitivity calculation means (3) varies a current flowing in the magnetic field generation coil (22) in a state where an outside-sensor magnetic field HO acting on the magneto-sensitive body (20) from outside the MI sensor (2) is constant. Consequently, the magnetic field acting on the magneto-sensitive body (20) is varied to calculate a sensitivity a by dividing a variation in an output voltage of the detection coil (21) by a variation in the magnetic field acting on the magneto-sensitive body (20).
    Type: Grant
    Filed: July 31, 2015
    Date of Patent: January 29, 2019
    Assignee: AICHI STEEL CORPORATION
    Inventors: Tomohiko Nagao, Michiharu Yamamoto
  • Patent number: 10175379
    Abstract: A first electrode is located at a borehole and a second electrode is located at the surface of the earth. At least one transmitter is selectively connected to one or both of the first and second electrodes to cause current to flow within a subsurface of the earth. When the at least one transmitter is connected to the first electrode, a current is caused to flow at a deep depth within the subsurface and deep source data is acquired. When the at least one transmitter is connected to the second electrode, a current is caused to flow at a shallow depth within the subsurface and shallow source data is acquired. The deep and shallow source data are then combined.
    Type: Grant
    Filed: November 11, 2014
    Date of Patent: January 8, 2019
    Assignee: Groundmetrics, Inc.
    Inventor: Andrew D Hibbs
  • Patent number: 10139934
    Abstract: A computer system for dynamically switching modes within a magnetic sensor device communicates through a secondary communication channel with a first magnetic sensor device and a second magnetic sensor device. The first magnetic sensor device includes at least a magnetic signal receiving functionality. The computer system determines that the second magnetic sensor device includes magnetic signal transmitting functionality and magnetic signal receiving functionality. After determining that the second magnetic sensor device includes magnetic signal transmitting functionality, the computer system causes the second magnetic sensor device to begin transmitting a first magnetic field signal.
    Type: Grant
    Filed: April 20, 2017
    Date of Patent: November 27, 2018
    Assignee: Microsoft Technology Licensing, LLC
    Inventors: Scott Francis Fullam, Lev Cherkashin, Steven James Velat
  • Patent number: 10107653
    Abstract: A sensor device includes a mounting member having fixation surfaces inside, and at least one electronic component directly or indirectly fixed to the fixation surfaces of the mounting member, and the mounting member constitutes a part of a casing for housing the electronic component. Further, the fixation surfaces are perpendicular to each other.
    Type: Grant
    Filed: January 14, 2015
    Date of Patent: October 23, 2018
    Assignee: Seiko Epson Corporation
    Inventors: Masayasu Sakuma, Yoshihiro Kobayashi, Shojiro Kitamura, Taketo Chino
  • Patent number: 9933495
    Abstract: A sensor device for suppressing a magnetic stray field, having a semiconductor body, a first pixel cell and a second pixel cell integrated into a surface of the semiconductor body together with a circuit arrangement. Each pixel cell has a first magnetic field sensor and a second magnetic field sensor to detect a magnetic field in the x-direction and a magnetic field in the y-direction. The first pixel cell is spaced apart from the second pixel cell along a connecting line, and the substrate and the semiconductor body are disposed in the same IC package. A magnet is provided that has a planar main extension surface in the direction of an x-y plane and has a magnetization with four magnetic poles in the direction of the x-y plane. The IC package is spaced apart from the main extension surface of the magnet in the z-direction and at least partially within a ring magnet.
    Type: Grant
    Filed: March 31, 2015
    Date of Patent: April 3, 2018
    Assignee: TDK-Micronas GmbH
    Inventors: Timo Kaufmann, Joerg Franke, Andreas Ring
  • Patent number: 9915708
    Abstract: An assembly of Hall sensors provides the following: the three averaged values for the magnetic field components are assigned to the same point in space, at the center of the Hall sensor assembly. This allows for the instantaneous measurement of the full field vector. With the appropriate electrical connections of the Hall elements from opposing surfaces of each pair, undesired planar Hall effect is practically cancelled out.
    Type: Grant
    Filed: December 6, 2013
    Date of Patent: March 13, 2018
    Assignee: Paul Scherrer Institut
    Inventors: Stephane Sanfilippo, Vjeran Vrankovic, Christina Wouters
  • Patent number: 9910108
    Abstract: A Real-Time Magnetic Field Camera wherein magnetic fields are instantaneously converted into an electronic display as a motion picture on a screen. The Real-Time Magnetic Field Camera is extremely portable, outputs magnetic field data instantly giving the user the ability to passively locate and study magnetic phenomenon as they exist in the real world. The Real-Time Magnetic Field Camera invention includes; magnetic sensors that are triangulated, at least one microcontroller and/or microprocessor, has a power source and has a means of an image display.
    Type: Grant
    Filed: June 27, 2016
    Date of Patent: March 6, 2018
    Inventor: Daniel Clyde Ross
  • Patent number: 9903741
    Abstract: Embodiments of the present disclosure relate to a magnetic position sensor (100; 200). The magnetic position sensor (100; 200) includes a magnetic field source (110; 210) with at least a first multi-pole magnet strip (120-1; 220-1) arranged on a first surface and with at least a second multi-pole magnet strip (120-2; 220-2) arranged on a second surface perpendicular to the first surface. The first and the second multi-pole magnet strips are arranged in a fixed relative position to each other and comprise different numbers of magnet poles (130; 132; 230; 232) along a common length.
    Type: Grant
    Filed: September 16, 2015
    Date of Patent: February 27, 2018
    Assignee: Infineon Technologies AG
    Inventor: Udo Ausserlechner
  • Patent number: 9893119
    Abstract: Disclosed examples provide wafer-level integration of magnetoresistive sensors and Hall-effect sensors in a single integrated circuit, in which one or more vertical and/or horizontal Hall sensors are formed on or in a substrate along with transistors and other circuitry, and a magnetoresistive sensor circuit is formed in the IC metallization structure.
    Type: Grant
    Filed: March 15, 2016
    Date of Patent: February 13, 2018
    Assignee: TEXAS INSTRUMENTS INCORPORATED
    Inventors: Dok Won Lee, William David French, Keith Ryan Green
  • Patent number: 9850746
    Abstract: The disclosed device provides a high-accuracy plunger arrival detection system comprising a low-power magnetometer with high sensitivity and which is capable of sampling low or high intensity magnetic fields. The device processes gathered data from sensors, stores at least some processed data in memory, executes a trending algorithm which compares the magnetic field of the plunger to the ambient magnetic field or a predetermined set of initialization values, and generates an output which is relayed to a well controller. An output signal may be via hard wire, RF, wireless or other known means. In addition, the implementation of two sensing devices mounted in series and in spaced relation to each other, can provide for an actual plunger average velocity. An actual plunger average velocity, as opposed to approximate average velocity, can be used to better optimize well control and improve safety of the overall well production system.
    Type: Grant
    Filed: October 22, 2015
    Date of Patent: December 26, 2017
    Assignee: PCS FERGUSON, INC.
    Inventors: Terry R. Wright, Burke E. Lowery, Paul T. Roberts
  • Patent number: 9841470
    Abstract: Provided is a magnetic field measuring device including a first sensor unit which includes a first coil sensor configured to output a first sensor signal, a second sensor unit which includes a second coil sensor configured to output a second sensor signal and disposed in a direction perpendicular to the first coil sensor, a third sensor unit which includes a third coil sensor configured to output a third sensor signal and disposed in a direction perpendicular to the first and second coil sensors, and a digital signal processor outputs magnetic flux density based on a voltage difference between the first and fourth nodes, wherein the first to third sensor units respectively output first to third output signals in which specific voltages of the first to third sensor signals are maintained for a predetermined period of time.
    Type: Grant
    Filed: January 15, 2016
    Date of Patent: December 12, 2017
    Assignee: Electronics and Telecommunications Research Institute
    Inventors: Jung Hwan Hwang, Jong Hwa Kwon
  • Patent number: 9746347
    Abstract: A sensor for sensing an angular position of a rotatable element with respect to a non-rotatable element, the sensor comprising an encoder fast in rotation with the rotatable element, and a sensor body fixed respective to the non-rotatable element. The sensor body includes at least one sensing element adapted to sense angular position or rotation speed and direction of the encoder, a signal processor support member, and a sensing data output connector comprising at least one electrical wire connected to the support member. The sensor comprises a tubular body (accommodating the connector), including a first half-shell integral with the sensor body and a second half-shell assembled with the first half-shell around the connector. A tubular body internal surface comprises at least one radial ridge adapted to block a translation of the output connector along a longitudinal axis of the tubular body by penetrating into a sheath of the connector.
    Type: Grant
    Filed: January 15, 2013
    Date of Patent: August 29, 2017
    Assignee: AKTIEBOLAGET SKF
    Inventors: Olivier Cheve, Florian Barcat, Nicolas Dhomette, Jérôme Carnac
  • Patent number: 9720126
    Abstract: In some embodiments, an apparatus and a system, as well as a method and an article, may operate to acquire a first signal from a first magnetometer at least partially disposed within a Helmholtz coil, to acquire a second signal from a second magnetometer having a sensitivity at least one thousand times less than the first magnetometer, to process the second signal to determine a drive signal, to drive the Helmholtz coil using the drive signal so as to null an ambient Earth magnetic field surrounding the first magnetometer, and to process the first signal as one of a down hole location signal or a down hole telemetry signal, the location signal to determine a range to a sub-surface object, and the telemetry signal to provide data from down hole drilling operations. Additional apparatus, systems, and methods are disclosed.
    Type: Grant
    Filed: January 19, 2012
    Date of Patent: August 1, 2017
    Assignee: Halliburton Energy Services, Inc.
    Inventor: Paul F. Rodney
  • Patent number: 9678168
    Abstract: A system including a sensor circuit and comparison circuitry. The sensor circuit is configured to provide a sensed signal. The comparison circuitry is configured to receive an input signal that corresponds to the sensed signal. The comparison circuitry provides output signals that switch state at different levels of the input signal.
    Type: Grant
    Filed: November 16, 2009
    Date of Patent: June 13, 2017
    Assignee: Infineon Technologies AG
    Inventors: Konrad Kapser, Arnold Rump
  • Patent number: 9671472
    Abstract: A system includes a helically polarized magnet having a plurality of north and south poles circumferentially and helically patterned along a linear axis. Magnetic flux varies at different positions along a linear path in a direction aligned with the linear axis. A multi-axis magnetometer and/or magnetometer array is configured with at least two sensing coils to detect the position of the helically polarized magnet by sensing the magnetic flux variations at the different positions along the linear path.
    Type: Grant
    Filed: March 3, 2014
    Date of Patent: June 6, 2017
    Assignee: Northrop Grumman Systems Corporation
    Inventors: Joseph Michael Maurio, Charles C. McCarthy, Mark Mulhern
  • Patent number: 9666343
    Abstract: An assembly for generating a superconducting magnetic field with high stability comprises a main power supply unit arranged to provide a main current to generate a superconducting magnetic field, a magnetic field measurement device for measuring the generated magnetic field, and an auxiliary power supply unit arranged to output an auxiliary current based on the measured magnetic field.
    Type: Grant
    Filed: August 22, 2016
    Date of Patent: May 30, 2017
    Inventor: Michael John Disney Mallett
  • Patent number: 9658298
    Abstract: A three-axis magnetic sensor or magnetometer is provided. Two magnetic sensor Wheatstone bridges using barber pole AMR structures are fabricated on opposite sides of a bump structure formed on a substrate to provide surfaces that are at a predetermined angle with respect to the flat surface of the substrate. The bridge assembly is oriented along the Y axis and the bridges are interconnected such that Y and Z channel signals can be produced by processing of the bridge signals. The X channel signals are provided by an X axis sensor provided on the level surface of the substrate.
    Type: Grant
    Filed: October 10, 2013
    Date of Patent: May 23, 2017
    Assignee: MEMSIC, INC
    Inventors: Yongyao Cai, Leyue Jiang, Paul Zavracky, Yang Zhao, Shuo Gu
  • Patent number: 9651636
    Abstract: A single-chip three-axis magnetic field sensing device is provided. This single-chip three-axis magnetic field sensing device comprises a substrate, a first sensing module, a second sensing module, a third sensing module and at least one coil. The substrate includes a surface. The first sensing module comprises at least one first magnetoresistive element and is configured to sense a first magnetic field component substantially parallel to the surface. The second sensing module comprises at least one second magnetoresistive element and is configured to sense a second magnetic field component substantially parallel to the surface. The third sensing module comprises at least one third magnetoresistive element and is configured to sense a third magnetic field component substantially perpendicular to the surface. Wherein one of the first magnetoresistive element and the second magnetoresistive element and the third magnetoresistive element is disposed right above or right below the at least one coil.
    Type: Grant
    Filed: August 29, 2013
    Date of Patent: May 16, 2017
    Assignee: Voltafield Technology Corp.
    Inventors: Nai-Chung Fu, Fu-Tai Liou, Jia-Mou Lee
  • Patent number: 9606195
    Abstract: The present invention discloses plural planar Hall-effect sensors each having a magnetic sensing region of an elongated shape, the magnetic sensing regions having plural orientations, wherein, for a ratio of long axis length to short axis length greater than a predetermined number, effective single magnetic domain behavior is exhibited in the sensing region, the sensing having shape-induced uniaxial magnetic anisotropy with the easy axis parallel to the long axis of the magnetic sensing region; further wherein the magnitude of the uniaxial magnetic anisotropy depends on the ratio of the thickness of the sensing region to the length of the short axis, and method of operating the same to measure plural magnetic field components.
    Type: Grant
    Filed: March 3, 2014
    Date of Patent: March 28, 2017
    Assignees: BAR ILAN UNIVERSITY, B. G. NEVEG TECHNOLOGIES AND APPLICATIONS LTD.
    Inventors: Lior Klein, Asaf Grosz, Vladislav Mor, Eugene Paperno, Shai Amrusi, Igor Faivinov, Mordechai Schultz, Omer Sinwani
  • Patent number: 9605975
    Abstract: A magnetic field sensor that provides target speed and direction detection that is independent of sensor-to-target orientation includes at least three differential channels, each responsive to a pair of magnetic field sensing elements to generate a respective magnetic field channel signal. A combining element is configured to generate a combined signal based on the first, second, and third magnetic field channel, signals and control circuitry responsive to the combined signal and to at least one of the first, second, and third magnetic field channel signals generates a sensor output signal that indicative of target speed and direction.
    Type: Grant
    Filed: June 5, 2015
    Date of Patent: March 28, 2017
    Assignee: ALLEGRO MICORSYSTEMS, LLC
    Inventors: Andrea Foletto, Andreas P. Friedrich
  • Patent number: 9601455
    Abstract: A semiconductor device includes: a substrate including a base member having a main surface and a back surface facing opposite in a thickness direction; a semiconductor element mounted on the main surface of the substrate and having at least one element pad; a wire having a bonding portion bonded to the element pad; and a sealing resin formed on the main surface of the substrate for covering the wire and at least a portion of the semiconductor element. The semiconductor element has an element exposed side surface that faces in a direction crossing the thickness direction of the substrate and is exposed from the sealing resin.
    Type: Grant
    Filed: June 30, 2015
    Date of Patent: March 21, 2017
    Assignee: ROHM CO., LTD.
    Inventors: Yuto Nishiyama, Motoharu Haga
  • Patent number: 9551772
    Abstract: An organic, spin-dependent magnetic field sensor (10) includes an active stack (12) having an organic material with a spin-dependence. The sensor (10) also includes a back electrical contact (14) electrically coupled to a back of the active stack (12) and a front electrical contact (16) electrically coupled to a front of the active stack (12). A magnetic field generator (18) is oriented so as to provide an oscillating magnetic field which penetrates the active stack (12).
    Type: Grant
    Filed: January 6, 2012
    Date of Patent: January 24, 2017
    Assignee: University of Utah Research Foundation
    Inventors: Dane McCamey, Christoph Boehme
  • Patent number: 9435662
    Abstract: A magneto-resistive angle sensor includes a first half bridge circuit including a first magneto-resistive element and a second magneto-resistive element, and a second half bridge circuit having a third magneto-resistive element and a fourth magneto-resistive element, wherein the first, second, third, and fourth magneto-resistive element are arranged parallel to a x?/y?-plane of a Cartesian reference system with an x?-axis and y?-axis, both orthogonal to each other.
    Type: Grant
    Filed: April 8, 2014
    Date of Patent: September 6, 2016
    Assignee: Infineon Technologies AG
    Inventor: Udo Ausserlechner
  • Patent number: 9423473
    Abstract: A method and structure for a three-axis magnetic field sensing device. An IC layer having first bond pads and second bond pads can be formed overlying a substrate/SOI member with a first, second, and third magnetic sensing element coupled the IC layer. One or more conductive cables can be formed to couple the first and second bond pads of the IC layer. A portion of the substrate member and IC layer can be removed to separate the first and second magnetic sensing elements on a first substrate member from the third sensing element on a second substrate member, and the third sensing element can be coupled to the side-wall of the first substrate member.
    Type: Grant
    Filed: January 27, 2015
    Date of Patent: August 23, 2016
    Assignee: MCUBE INC.
    Inventors: Hong Wan, Anthony F. Flannery
  • Patent number: 9404980
    Abstract: The magnetometers possess a detector part with a magnetosensitive material sensitive to the magnetic field and coil surrounding its magnetosensitive material to pick-up the magnetic field, a pulse generator circuit supplies pulse current to the magnetic material, a sample holding circuit including with an electronic switch synchronized with pulse timing for switching on/off and holding capacitance to charge electricity produced by the pickup coil during the switch on period, and an amplifier circuit amplifies the holding capacitance voltage. Magnetometers possess a Buffer circuit connecting the output side of the pickup coil with the input side of the Buffer circuit and connects the output side of the Buffer circuit with the input side of the electronic switch to transfer the pulse signal voltage induced in the pickup coil from the input side to the output side keeping the pulse signal voltage of the outside at the same level as the inside.
    Type: Grant
    Filed: January 22, 2014
    Date of Patent: August 2, 2016
    Assignee: MAGNEDESIGN CORPORATION
    Inventor: Yoshinobu Honkura
  • Patent number: 9354291
    Abstract: A dynamically self-adjusting magnetometer is disclosed. In one embodiment, a first sample module periodically generates an electronic signal related to at least one magnetic field characteristic of a monitored environment. A second sample module periodically generates an electronic signal related to at least one magnetic field characteristic of a monitored environment. A summing module sums the absolute value of the electronic signal from the first sample module and the electronic signal from the second sample module. A delta comparator module receives the electronic signals from each of the first sample module, the second sample module and the summing module and compares each of the electronic signals with a previously received set of electronic signals to establish a change, wherein an output is generated if the change is greater than or equal to a threshold.
    Type: Grant
    Filed: February 5, 2014
    Date of Patent: May 31, 2016
    Assignee: Broadband Discovery Systems, Inc.
    Inventor: Cory J. Stephanson
  • Patent number: 9301569
    Abstract: An article with a color change portion and a method of changing color. The article includes at least one color change portion capable of changing colors. The color change portion includes composite material including a photonic lattice. The color change portion can change colors according to one or more performance parameters. The article can be connected to a computer and the color change portion can be controlled using the computer.
    Type: Grant
    Filed: June 26, 2014
    Date of Patent: April 5, 2016
    Assignee: NIKE, Inc.
    Inventors: Sharna M. Donovan, Sean D. Hartford, Michelle L. Kvernmo, Vikram Malhotra, James Molyneux, Andrew A. Owings, Aaron B. Weast, Bradley W. Wilkins
  • Patent number: 9297863
    Abstract: A planarized 3-dimensional magnetic sensor chip includes a first magnetic sensing device, a second magnetic sensing device, a third magnetic sensing device and a magnetic flux bending concentrating structure on a circuit chip substrate, wherein the first magnetic sensing device and the second magnetic sensing device are used to measure the magnitude of flux in a first direction and a third direction together, and the third magnetic sensing device is used to measure the magnitude of flux in a second direction, the magnetic flux bending concentrating structure is used to bend the magnitude of flux in the third direction to the first direction, such that the magnitude of flux in the third direction can be measured by first magnetic sensing device and the second magnetic sensing device in the first direction.
    Type: Grant
    Filed: March 15, 2013
    Date of Patent: March 29, 2016
    Inventor: Meng-Huang Lai
  • Patent number: 9279783
    Abstract: Disclosed herein are an apparatus and a method for detecting a crack. The apparatus includes a power supply unit, a sensor module, and a signal reception module. The power supply unit supplies power. The sensor module receives the input power from the power supply unit, and outputs sensing power corresponding to the magnetic field of an object to be measured. The signal reception unit converts the sensing power output from the sensor module into a quantitative value, and computes the distribution of the magnetic field. The sensor module includes a first sensor array configured to detect magnetic field vectors in a direction vertical to a sensor surface, and a second sensor array placed on the first sensor array in an overlapping manner and configured to detect magnetic field vectors in a direction lateral with respect to the sensor surface.
    Type: Grant
    Filed: November 2, 2012
    Date of Patent: March 8, 2016
    Assignee: INDUSRTY-ACADEMIC COOPERATION FOUNDATION CHOSUN UNIVERSITY
    Inventors: Jin Yi Lee, Jong Woo Jun, Jung Min Kim
  • Patent number: 9229067
    Abstract: A magnetic field verifier apparatus includes a magnetic field detection element configured to produce a voltage signal in response to an applied magnetic field wherein the voltage signal corresponds to the strength of the applied magnetic field. Substantially identical circuit boards or units are connected to a central unit or mother board to place magnetic field detection elements of each board or unit in an mutually approximately orthogonal relationship. A microcontroller is in communication with the voltage signal. The magnetic field verifier apparatus is configurable to sense particular field strengths at various frequencies and store the readings to provide the user with a reliable verification that a particular magnetic field strength has been produced in a particular environment.
    Type: Grant
    Filed: May 2, 2014
    Date of Patent: January 5, 2016
    Assignee: Data Security, Inc.
    Inventor: Robert A. Schultz
  • Publication number: 20150115949
    Abstract: A magnetic sensor having a large magnetic-field detection angle range and a bridge circuit used in the magnetic sensor, in each of multiple MR elements in the bridge circuit, multiple strips, on the whole, along a direction substantially orthogonal to a magnetic-field detection direction are arranged in parallel at certain intervals and are sequentially connected so as to be folded back and, in each of the multiple strips, multiple strips along the magnetic-field detection direction are arranged in parallel at certain intervals and are sequentially connected so as to be folded back to form a zigzag pattern in which the multiple strips are electrically connected in series to each other.
    Type: Application
    Filed: October 30, 2014
    Publication date: April 30, 2015
    Inventor: ATSUSHI ITAGAKI
  • Patent number: 8970213
    Abstract: In a method for manufacturing the functional element, a protective film covering an underlayer, a patterned multilayer film, and a patterned cap layer are formed, and the underlayer is then processed without newly forming a resist. Thereby, an electrode can be formed in steps less than ever before. Since the protective film formed on the patterned multilayer film and the patterned cap layer is used as a mask, the problem of the misregistration can be prevented.
    Type: Grant
    Filed: June 19, 2012
    Date of Patent: March 3, 2015
    Assignee: Canon Anelva Corporation
    Inventors: Tomohiko Toyosato, Mihoko Nakamura, Kazuhiro Kimura, Masayoshi Ikeda