Inductive Patents (Class 324/207.15)
  • Patent number: 10724876
    Abstract: A linear-displacement sensor includes a base element arranged with a sensor coil and an excitation coil in such a manner that an AC voltage is induced in the sensor coil upon application of an AC voltage to the excitation coil. An at least partly electrically conductive sliding element is configured to be shifted relative to the base element in a direction along the measurement path. The sliding element has a variable geometry along the measurement path to inductively couple partial turns of the sensor coil with the excitation coil. A correction coil is arranged above a geometry of the sliding element so that an inductive coupling of the correction coil and hence an amplitude of an AC voltage induced in the correction coil is dependent on a lateral offset of the sliding element in relation to the base element.
    Type: Grant
    Filed: October 19, 2016
    Date of Patent: July 28, 2020
    Assignee: Robert Bosch GmbH
    Inventors: Ingo Herrmann, Fabian Utermoehlen, Andreas Merz, Stefan Leidich
  • Patent number: 10705159
    Abstract: An integrated fluxgate device has a magnetic core disposed over a semiconductor substrate. A first winding is disposed in a first metallization level above and a second metallization level below the magnetic core, and is configured to generate a first magnetic field in the magnetic core. A second winding is disposed in the first and second metallization levels and is configured to generate a second magnetic field in the magnetic core. A third winding is disposed in the first and second metallization levels and is configured to sense a magnetic field in the magnetic core that is the net of the first and second magnetic fields.
    Type: Grant
    Filed: July 3, 2019
    Date of Patent: July 7, 2020
    Assignee: TEXAS INSTRUMENTS INCORPORATED
    Inventors: Erika Lynn Mazotti, Dok Won Lee, William David French, Byron J R Shulver, Thomas Dyer Bonifield, Ricky Alan Jackson, Neil Gibson
  • Patent number: 10598777
    Abstract: A proximity sensor for measuring the distance from a target contains a microwave oscillator providing a transmission wave output signal emitted toward the target as a free space transmission wave which is reflected by an electrically conductive target surface as a free space reflection wave received by the proximity sensor as a reflection wave. The distance is determined from the transmission wave and the reflection wave. The transmission wave is guided in a waveguide transmission path as a waveguide transmission wave. The transmission wave is coupled into the waveguide with a wave mode leading to the detachment of the waveguide transmission wave at the waveguide front end aperture into the free space transmission wave and to the propagation of the free space transmission wave to the target. At least one reception path is electromagnetically decoupled from the transmission path and guides the reflection wave as a waveguide reflection wave.
    Type: Grant
    Filed: December 23, 2014
    Date of Patent: March 24, 2020
    Assignee: Balluff GmbH
    Inventors: Mark Eberspaecher, Sorin Fericean
  • Patent number: 10578584
    Abstract: A calibration device for a non-destructive inspection/measurement system is provided, including an excitation coil; a detection coil; and a computer that applies a sinusoidal signal or a combined signal including multiple sinusoids having mutually different frequencies to the excitation coil in order to excite a pipe body, and that detects changes in the output voltage of the detection coil. The calibration device calibrates the detection results in the computer by entering, as variables in simultaneous equations, the amplitudes and phase differences of the output voltage of the detection coil at multiple calibration points of known thickness on the pipe body. The calibration device performs calibrations by using multiple different calibration conditions at each of the calibration points, and entering, into the simultaneous equations, the amplitudes and phase differences of the output voltage of the detection coil for each of the calibration conditions.
    Type: Grant
    Filed: October 4, 2017
    Date of Patent: March 3, 2020
    Assignee: DAINICHI Machine and Engineering Co., Ltd.
    Inventors: Kazuma Takakura, Gijun Idei, Masao Kaizuka
  • Patent number: 10532832
    Abstract: A magnetic levitation reaction sphere includes a spherical-housing-shaped rotor and three groups of stators. Each group includes two stators using the sphere center of the rotor as a symcenter. Axes of the three groups are mutually orthogonal. Each stator comprises a stator core and a coil array. An air gap is reserved between an inner surface of each stator core and the outer surface of the rotor. Through grooves are radially formed in the stator cores. The coil arrays are disc-type motor stator windings. Two effective sides of each coil in each coil array are respectively placed in two through grooves of the corresponding stator core. The magnetic levitation reaction sphere has low cost; levitation and rotation driving are integrated; the magnetic levitation reaction sphere has a simple and compact structure, a small size and a low mass, and relates to inherent stable levitation; and the levitation control is simple.
    Type: Grant
    Filed: March 15, 2016
    Date of Patent: January 14, 2020
    Assignees: TSINGHUA UNIVERSITY, BEIJING U-PRECISION TECH CO., LTD.
    Inventors: Ming Zhang, Yu Zhu, Anlin Chen, Kaiming Yang, Rong Cheng, Feng Liu, Jinchun Hu, Chuxiong Hu, Dengfeng Xu, Haihua Mu
  • Patent number: 10528101
    Abstract: A heat control method and device are provided. In the method, a distance or distances between one or more regions of a terminal and a predetermined detection object may be detected (S102); heat insulation processing may be performed in a first region of the terminal, where the first region may be a region of which the distance to the predetermined detection object is smaller than a first predetermined threshold; and/or, heat dissipation processing may be performed in a second region of the terminal, where the second region may be a region of which the distance to the predetermined detection object is larger than a second predetermined threshold (S104).
    Type: Grant
    Filed: August 6, 2015
    Date of Patent: January 7, 2020
    Assignee: XI'AN ZHONGXING NEW SOFTWARE CO., LTD.
    Inventor: Biao Yuan
  • Patent number: 10520629
    Abstract: Systems and methods for vehicle detection and assessments of loop deterioration rely on changes in inductance of a loop sensor. The conductive element of the loop sensor is modeled using one or more inductances and one or more resistances. Sets of stimuli at different frequencies are provided to the loop sensor, and the resulting responses form the basis for vehicle detection and for an assessment whether the loop sensor has deteriorated.
    Type: Grant
    Filed: July 11, 2018
    Date of Patent: December 31, 2019
    Assignee: HM Electronics, Inc.
    Inventors: David O'Gwynn, Shane Robert Petcavich
  • Patent number: 10469078
    Abstract: To ensure omnidirectional visibility of a proximity sensor with high luminance using a single light emitting element. A proximity sensor (1) includes a substrate (14) on which a control unit (20) is formed and in which a normal direction of the substrate is perpendicular to an axial direction of a coil section (13), a light emitting element (15) which emits light in the axial direction on the substrate, a light diffusion section (16a) which diffuses emitted light in a direction other than the axial direction, and a light guide section (16b) which guides diffused light to a display section (21) on a side surface.
    Type: Grant
    Filed: November 16, 2017
    Date of Patent: November 5, 2019
    Assignee: OMRON Corporation
    Inventors: Ryota Hasegawa, Takaaki Sanda
  • Patent number: 10440544
    Abstract: Various embodiments concern motion sensor modules able to monitor movement. A motion sensor module can be detachably connected to an electronic device to which the motion sensor module transfers motion data. In some embodiments, the motion sensor module is connected to an electronic device associated with an individual. In other embodiments, the motion sensor module is embedded within an article of clothing worn by the individual (e.g., a shirt, swimsuit, or shoe). The motion sensor module includes at least one inertial measurement unit (IMU) that generates motion data indicative of the motion of the motion sensor module as a whole.
    Type: Grant
    Filed: June 28, 2018
    Date of Patent: October 8, 2019
    Assignee: ESSENTIAL PRODUCTS, INC.
    Inventor: Jason Sean Gagne-Keats
  • Patent number: 10439609
    Abstract: A touch switch includes a touch input section, a metal piece provided to the touch input section at a surface thereof, and at least two induction-type proximity sensors so provided as to face the metal piece. The induction-type proximity sensors are arranged in parallel to each other and each have an LC oscillation circuit that output signals that changes in accordance with the distance to the metal piece. A duplicated touch switch that requires no stroke and achieves switch duplication is thus provided.
    Type: Grant
    Filed: August 17, 2016
    Date of Patent: October 8, 2019
    Assignee: FANUC CORPORATION
    Inventors: Yoshiaki Kurobe, Hiroyuki Suwa
  • Patent number: 10347384
    Abstract: The present invention provides an apparatus for detecting and/or repositioning annulus spacers used to maintain the position of a pressure tube within a calandria tube of a nuclear reactor. The method comprises the steps of: vibrationally isolating a section of the pressure tube; vibrating the wall of said pressure tube within said isolated section; detecting vibration of the wall at a minimum of two axial positions within said isolated sections; and detecting the reduction in vibration level of the wall at one or more of said axial positions in comparison to the remaining axial positions. The apparatus comprises a tool head to be inserted into the pressure tube, the tool head comprising a first end and a second and a clamping block m each of said ends. The clamping blocks are used to vibrationally isolate a section of the pressure tube located between said ends.
    Type: Grant
    Filed: September 7, 2016
    Date of Patent: July 9, 2019
    Assignee: ATOMIC ENERGY OF CANADA LIMITED
    Inventors: James M. King, Bruce A. W. Smith, Paul Feenstra
  • Patent number: 10337889
    Abstract: A device for inductive position determination comprises a coil, a positional element, a scanning device for determining an inductance of the coil and an evaluation device for determining a position of the positional element in relation to the coil, based on the inductance determined. In certain embodiments, the positional element comprises a ferromagnetic and electrically insulated material.
    Type: Grant
    Filed: December 15, 2015
    Date of Patent: July 2, 2019
    Assignee: ZF FRIEDRICHSHAFEN AG
    Inventors: Ajoy Palit, Joachim Degen
  • Patent number: 10332365
    Abstract: This disclosure relates to haptic actuators, and suitably haptic actuators based on repulsion and attraction between a coil and a magnet. Such haptic actuators are useful in structural materials, such as elements of wearables or accessories.
    Type: Grant
    Filed: January 23, 2018
    Date of Patent: June 25, 2019
    Assignee: IMMERSION CORPORATION
    Inventors: Vahid Khoshkava, Juan Manuel Cruz-Hernandez
  • Patent number: 10288699
    Abstract: A resonant impedance sensing system includes a class D negative impedance stage implemented with a Class D comparator, and a loop control stage implemented with an output comparator clocked by the class D comparator, establishing a negative impedance control loop that includes the resonator as a loop filter. The negative impedance stage includes a multi-level current source (such as a current DAC) interfaced to the resonator through an H-bridge controlled by the class D comparator. Class D switching synchronizes resonator oscillation voltage (input to the class D comparator) with resonator current drive (from the multi-level current source), driving the resonator with a negative impedance that balances resonator impedance to maintain sustained oscillation.
    Type: Grant
    Filed: May 1, 2017
    Date of Patent: May 14, 2019
    Assignee: TEXAS INSTRUMENTS INCORPORATED
    Inventor: George P. Reitsma
  • Patent number: 10186905
    Abstract: The invention relates to a method of operating a three phase primary winding structure of a system for inductive power transfer, wherein the primary winding structure includes a first phase line, a second phase line and a third phase line, wherein in a standard operational mode a first phase input voltage, a second phase input voltage and a third phase input voltage are controlled such that a predetermined phase shift between all three phase input voltages is provided, wherein in a modified operational mode the first phase input voltage, the second phase input voltage and the third phase input voltage are controlled such that the set of phase shift values includes at most two non-zero values and all non-zero phase shift values are equal. Furthermore, the invention relates to a primary unit of a system for inductive power transfer.
    Type: Grant
    Filed: November 18, 2014
    Date of Patent: January 22, 2019
    Assignee: Bombardier Primove GmbH
    Inventors: Konrad Woronowicz, Robert Czainski, Dominik Anders, Alireza Safaee
  • Patent number: 10060762
    Abstract: The invention relates to a sensor element for an inductive sensor used for a displacement or distance measurement by means of a magnetic field that varies according to the distance from the measurement object but that remains temporally constant. In said sensor, thin ferromagnetic material is integrated into a substrate. The invention also relates to a sensor comprising said sensor element and to a method for producing the sensor element.
    Type: Grant
    Filed: July 4, 2014
    Date of Patent: August 28, 2018
    Assignee: MICRO-EPSILON Messtechnik GmbH & Co. KG
    Inventors: Christian Pfaffinger, Werner Groemmer, Karl Wisspeintner, Guenter Schallmoser, Thomas Wisspeintner
  • Patent number: 10050490
    Abstract: An insulated bearing assembly for coupling a shaft with an outer member includes an inner race disposed upon the shaft and an outer race disposed about the inner race and having an outer circumferential surface and axial ends. An annular insulator is formed of an electrically insulative and thermally conductive material and is coupled with either the outer race or the inner race such that the insulator is generally disposed between the outer race and the outer member or between the inner race and the shaft. A polymeric member has an annular portion(s) disposed against one of the two axial ends of the coupled outer race or inner race and an axial portion(s) extending from the annular portion and coupled with the insulator member so as to retain the insulator member coupled with the outer race or the inner race when the bearing assembly is separate from the outer member.
    Type: Grant
    Filed: June 1, 2017
    Date of Patent: August 14, 2018
    Assignee: AKTIEBOLAGET SKF
    Inventors: Mathieu Hubert, Igor Dorrestijn, Karl Pries
  • Patent number: 10036655
    Abstract: A linear travel measurement apparatus is configured for a compression travel of an electrically conductive spring. A spring unit includes the linear travel measurement apparatus and a spring. The spring has an electrical contact at each of its ends and is electrically connected to a measurement circuit by corresponding electrical lines as measurement inductance. The measurement circuit detects a change in the measurement inductance, the change caused by the compression travel, and evaluates said change in order to ascertain the spring travel.
    Type: Grant
    Filed: September 26, 2016
    Date of Patent: July 31, 2018
    Assignee: Robert Bosch GmbH
    Inventors: Fabian Utermoehlen, Stefan Leidich
  • Patent number: 10024993
    Abstract: Systems and methods for vehicle detection and assessments of loop deterioration rely on changes in inductance of a loop sensor. The conductive element of the loop sensor is modeled using one or more inductances and one or more resistances. Sets of stimuli at different frequencies are provided to the loop sensor, and the resulting responses form the basis for vehicle detection and for an assessment whether the loop sensor has deteriorated.
    Type: Grant
    Filed: January 9, 2018
    Date of Patent: July 17, 2018
    Assignee: HM Electronics, Inc.
    Inventors: David O'Gwynn, Shane Robert Petcavich
  • Patent number: 9979237
    Abstract: A wireless power transmission system is presented. The wireless power circuit includes an adaptive transmitter coupled to a transmit coil; a receive coil in interaction with the transmit coil, the receive coil being thin and having an inner diameter large enough to accommodate sensors of a wearable device; and a receive circuit receiving power from the receive coil.
    Type: Grant
    Filed: March 10, 2016
    Date of Patent: May 22, 2018
    Assignee: Integrated Device Technology, Inc.
    Inventor: Mehmet K. Nalbant
  • Patent number: 9952063
    Abstract: A contactless electromagnetic sensor device for determining displacements of a rotor (120) is disclosed. Two sensing coils (612, 614) interact with surfaces of the rotor. A bridge circuit is formed by the sensing coils and by two secondary windings (212, 213) of an input transformer (210). The primary winding of the input transformer receives an excitation signal. An output signal is obtained at an output tap formed by a common node between the sensing coils (612, 614) and a common node between the secondary windings of the input transformer. In this manner excitation and detection are separated. If cables are used for connecting the bridge circuit to signal processing circuitry, the input and output impedances of the bridge circuit can be matched to the characteristic impedance of the cables. An output transformer can be connected to the output tap. The roles of the input and output transformers can be interchanged.
    Type: Grant
    Filed: September 26, 2014
    Date of Patent: April 24, 2018
    Assignee: MECOS AG
    Inventors: Stephan Germann, Philipp Buhler
  • Patent number: 9863915
    Abstract: A bending detection apparatus for a flexible device includes a plurality of antennas disposed to be bent together with a flexible device; and a bending detection unit for detecting bending of the flexible device based on inductances of the plurality of antennas or information corresponding to the inductances, a bending detection method for a flexible device, and a flexible device.
    Type: Grant
    Filed: August 26, 2014
    Date of Patent: January 9, 2018
    Assignee: LG Display Co., Ltd.
    Inventors: Heeseo Hwang, HaZoong Kim, SungWan Hong
  • Patent number: 9772202
    Abstract: An electronic absolute position encoder includes a scale extending along a measuring axis direction (MA) and including a signal modulating scale pattern defining a corresponding absolute range R along MA, a detector including sensing elements arranged along MA and configured to provide detector signals which respond to the signal modulating scale pattern, and a signal processing configuration that determines an absolute position of the detector along the scale based on the detector signals. The signal modulating scale pattern includes a coarse periodic pattern component as a function of position along the scale having a spatial wavelength ?C, wherein n*?C=R and n is an integer, and a fine periodic pattern component as a function of position along the scale having a spatial wavelength ?F, wherein (mn+1)*?F=R and m is an integer that is at least two. The wavelengths ?C and ?C may be widely separated.
    Type: Grant
    Filed: July 1, 2016
    Date of Patent: September 26, 2017
    Assignee: Mitutoyo Corporation
    Inventor: Ted Staton Cook
  • Patent number: 9739671
    Abstract: A pressing force sensor that includes a sensor element configured with a piezoelectric film, a lead terminal for connection to an external circuit, a wiring conductor which connects pressing force detection electrodes and the lead terminal, and a flexible printed circuit board which withstands solder reflow temperatures. The flexible printed circuit board has the pressing force detection electrodes formed on a first principal surface thereof, and is folded via a folding line while the first principal surface faces inward. The sensor element is deflected by a pressing force applied to a second principal surface which faces outward and is in a first area of the flexible printed circuit board which is on one side with respect to the folding line, and a signal corresponding to the pressing force is thus taken out from the pressing force detection electrodes.
    Type: Grant
    Filed: January 14, 2015
    Date of Patent: August 22, 2017
    Assignee: MURATA MANUFACTURING CO., LTD.
    Inventors: Keisuke Araki, Hideki Kawamura, Jun Endo
  • Patent number: 9728283
    Abstract: A cam is immersed in water at an elevated temperature and/or pressure. A reciprocating cam follower also immersed in the water contacts a surface of the cam. The cam follower includes a permanent magnet. An electrically conductive coil is magnetically coupled with the permanent magnet such that movement of the cam follower induces an electrical signal in the electrically conductive coil. A sealed housing also immersed in the water contains the electrically conductive coil and seals it from contact with the water. Leads of the coil are electrically accessible from outside the sealed housing and from outside the water. Alternatively, the cam includes magnetic inserts, the cam follower is replaced by a sensor arm of magnetic material, and the sensor arm and/or the inserts are magnetized whereby rotation of the rotary element causes time modulation of the magnetic coupling and induces coil voltage.
    Type: Grant
    Filed: July 26, 2016
    Date of Patent: August 8, 2017
    Assignee: BWXT NUCLEAR OPERATIONS GROUP, INC.
    Inventors: Brett T. Goodyear, Christopher D. Dodd
  • Patent number: 9706958
    Abstract: According to the embodiments described herein, a method for characterizing in vivo operation of a dental prosthetic can include providing subject position data and prosthetic position data. The method may further include transforming the subject position data into a reference three-dimensional coordinate system. The reference three-dimensional coordinate system can be ordered according to a coordinate index. The coordinate index can be based at least in part upon a subject position index of the subject position data. The method may further include comparing, automatically with one or more processors, the prosthetic position data and the reference three-dimensional coordinate system according to a comparison order to characterize the dental prosthetic. The comparison order can be based at least in part upon a prosthetic position index of the prosthetic position data and the coordinate index.
    Type: Grant
    Filed: April 10, 2014
    Date of Patent: July 18, 2017
    Assignee: THE PROCTER & GAMBLE COMPANY
    Inventors: Phyllis D. Hoke, Julie Myers Grender, Jill Renee Underwood, Gregory John Carr, Malgorzata Klukowska
  • Patent number: 9696184
    Abstract: To eliminate measurement errors, such as “offset voltages” in sensors of the inductive type by modifying the architecture of the assembly of elements used for signal processing, the architecture of the apparatuses processing the signal from the secondary windings is modified as follows: the amplifiers of this sensor are placed between the low-pass filters and the output terminals of the sensor, the voltages from the two secondary windings pass into an RC filter including a resistor and a capacitor, the voltage from each of the secondary windings passes into two multiplexers, one of which allows only the positive half-cycle to pass through, the other being wired so as to allow only the negative half-cycle to pass through, and the unused outputs of these multiplexers are connected to the common point between the secondary windings, low-pass filters are placed between each of the multiplexers and the amplifiers.
    Type: Grant
    Filed: December 10, 2013
    Date of Patent: July 4, 2017
    Assignees: CONTINENTAL AUTOMOTIVE FRANCE, CONTINENTAL AUTOMOTIVE GMBH
    Inventor: Xavier Hourne
  • Patent number: 9683869
    Abstract: An electronic absolute position encoder comprises a scale, a detector and a signal processing configuration. The scale comprises a signal modulating scale pattern including a first periodic pattern component having a spatial wavelength ?1, and a second periodic pattern component having a spatial wavelength ?2. The detector comprises a set of first wavelength sensing elements comprising a first filtering subset of first wavelength sensing elements and a second filtering subset of first wavelength sensing elements including complementary pairs of sensing elements spaced apart by an integer number times 180 degrees of the spatial wavelength ?2. The detector comprises a set of second wavelength sensing elements comprises a first filtering subset of second wavelength sensing elements and a second filtering subset of second wavelength sensing elements including complementary pairs of sensing elements spaced apart by an integer number times 180 degrees of the spatial wavelength ?1.
    Type: Grant
    Filed: December 11, 2015
    Date of Patent: June 20, 2017
    Assignee: Mitutoyo Corporation
    Inventor: Daniel John Kapner
  • Patent number: 9651402
    Abstract: An encoder scale for an electromagnetic induction linear encoder includes a substrate, an electroconductive layer exhibiting electroconductivity and provided to one surface of the substrate, and an electric conductor provided on the electroconductive layer. The electroconductive layer is wider than the electric conductor in a plan view of the substrate and is grounded. The electroconductive layer is formed on the entire one surface of the substrate except a guide surface, and glass is exposed on the guide surface.
    Type: Grant
    Filed: August 4, 2015
    Date of Patent: May 16, 2017
    Assignee: MITUTOYO CORPORATION
    Inventor: Yukinari Nozawa
  • Patent number: 9631948
    Abstract: A method and an arrangement for performing the method for the error-free conversion of the counting values of a segment counter including Wiegand sensors and the position values of a fine position sensor into a total position value using the last magnetization direction of the Wiegand wire of a segment counter as part of the information for an absolute synchronization of counting and position values. The method further includes detecting a magnetization direction of the Wiegand wire on the basis of a combination of the magnetization direction, the last stored counting value of the segment counter, and information of the fine position sensor about the current.
    Type: Grant
    Filed: August 17, 2015
    Date of Patent: April 25, 2017
    Assignee: AVAGO TECHNOLOGIES GENERAL IP (SINGAPORE) PTE. LTD.
    Inventors: Walter Mehnert, Thomas Theil
  • Patent number: 9603548
    Abstract: An improved system for magnetic position tracking of a device includes a magnetic transmitter, a magnetic sensor, a computing system and a polarity inverter. The magnetic transmitter includes at least one transmitter coil that outputs a transmitted magnetic field having a time derivative component. The magnetic sensor includes at least one sensor coil that has coil terminals having a polarity, and the sensor coil is responsive to the time derivative component of the transmitted magnetic field and outputs a sensor signal. The computing system computes position and angular orientation data of a device based on the sensor signal and the polarity inverter is configured to connect to the coil terminals and to cause the polarity of the coil terminals to be reversed according to a switching signal.
    Type: Grant
    Filed: June 27, 2016
    Date of Patent: March 28, 2017
    Assignee: Ascension Technology Corporation
    Inventor: Westley S. Ashe
  • Patent number: 9595382
    Abstract: A resonance coil includes plural unit coils where directions of magnetic fields which are formed by flowing of electric current are the same, in which the plural unit coils are arranged around a coil center line, and when the resonance coil is seen in a direction of the coil center line, the coil wire that forms the resonance coil is formed so as not to be overlapped.
    Type: Grant
    Filed: February 23, 2012
    Date of Patent: March 14, 2017
    Assignees: TOYOTA JIDOSHA KABUSHIKI KAISHA, NATIONAL UNIVERSITY CORPORATION NAGOYA INSTITUTE OF TECHNOLOGY
    Inventors: Shinji Ichikawa, Nobuyoshi Kikuma, Masafumi Kadoi
  • Patent number: 9551595
    Abstract: An induction detecting type rotary encoder includes: a stator; a rotor disposed opposite the stator; a first transmitting coil that is provided in the stator and includes a first inner circumference coil and a first outer circumference coil; a second transmitting coil that is provided in the stator and includes a second inner circumference coil and a second outer circumference coil; first and second receiving coils provided in the stator; and first and second magnetic flux coupling bodies provided in the rotor. The closest distance between the first inner circumference coil and the second magnetic flux coupling body is shorter than that between the first outer circumference coil and the second magnetic flux coupling body. The closest distance between the second inner circumference coil and the first magnetic flux coupling body is shorter than that between the second outer circumference coil and the first magnetic flux coupling body.
    Type: Grant
    Filed: April 2, 2015
    Date of Patent: January 24, 2017
    Assignee: MITUTOYO CORPORATION
    Inventor: Kouji Sasaki
  • Patent number: 9547099
    Abstract: The present invention provides a magnetic induction pad. The magnetic induction pad includes a deformation body and a plurality of magnetic induction modules. The interior of the deformation body includes a filling space that is in connection with the outside via at least one gas nozzle. The external of the deformation body includes a first surface and a second surface. The first surface and the second surface include a plurality of first bag bodies and a plurality of second bag bodies, respectively. The plurality of first bag bodies are mutually arranged to form a first pattern. The plurality of second bag bodies are mutually arranged to form a second pattern that are the same as the first patterns, so as to enable the position of each of the plurality of first bag bodies on the first surface to have a corresponding arrangement to each of the plurality of second bag bodies of the second surface. The plurality of magnetic induction modules includes a group of magnetic members and a group of induction members.
    Type: Grant
    Filed: January 26, 2015
    Date of Patent: January 17, 2017
    Assignee: CAREMED SUPPLY INC.
    Inventor: Pao Ming Shih
  • Patent number: 9418895
    Abstract: Deep reactive ion silicon etching of a device wafer, laser-induced release of individual dies, and individual placement of the dies on flexible substrates facilitate formation of circuits having relatively large external inductors for powering devices such as RFID devices. Small flexible tabs enable die-inductor connection. The absorption properties of both an adhesive layer and an ablation layer may be employed to facilitate debonding of individual dies from a glass handler without damaging integrated circuits associated with the dies. Die packs including cavities for accepting individual dies facilitate fabrication processes using dies having small dimensions.
    Type: Grant
    Filed: March 14, 2015
    Date of Patent: August 16, 2016
    Assignee: INTERNATIONAL BUSINESS MACHINES CORPORATION
    Inventors: Paul S. Andry, Robert L. Wisnieff
  • Patent number: 9383184
    Abstract: An inductive position-measuring device includes a scanning element and a graduation element that are movable relative to each other in a first direction. The scanning element includes exciter conductors and three receiver tracks. The first and the second receiver track are disposed at a distance relative to each other, and the third receiver track is located between the first and the second receiver track. The graduation element includes two graduation tracks which are disposed at a distance relative to each other, and which have different graduation periods. Furthermore, electromagnetic fields generated by the exciter conductors are able to be modulated by the graduation tracks, so that a relative position in the first direction is detectable by the first and the second receiver track, while a relative position in a second direction, which is oriented orthogonally with respect to the first direction, is detectable by the third receiver track.
    Type: Grant
    Filed: December 13, 2013
    Date of Patent: July 5, 2016
    Assignee: DR. JOHANNES HEIDENHAIN GMBH
    Inventors: Marc Oliver Tiemann, Martin Heumann
  • Patent number: 9383185
    Abstract: A sensor apparatus for detecting a position of an axially movable camshaft is provided. The sensor apparatus includes a coil block including a detection coil wound along an axial direction of the camshaft to define a bore into which the camshaft is inserted, and a control unit electrically connected to the detection coil and designed to output a signal based on a change in inductance of the detection coil.
    Type: Grant
    Filed: June 13, 2011
    Date of Patent: July 5, 2016
    Assignee: PANASONIC INTELLECTUAL PROPERTY MANAGEMENT CO., LTD.
    Inventors: Masafumi Itonaga, Norihiro Ida
  • Patent number: 9377328
    Abstract: A sensor includes a magnetic piece with a magnetic array, a conductive coil and ferromagnetic object. The magnetic array provides a spatially modulated magnetic field that is concentrated in the near-field. A processor calculates the ferromagnetic object's speed based on voltage induced in the conductive coil. The ferromagnetic object's movement through the magnetic field causes a change in the magnetic flux, and the rate of change is proportional to the induced voltage.
    Type: Grant
    Filed: January 24, 2012
    Date of Patent: June 28, 2016
    Assignee: GM GLOBAL TECHNOLOGY OPERATIONS LLC
    Inventor: Jan F. Herbst
  • Patent number: 9347800
    Abstract: Sensor with a one-layer or multi-layer sensor element operating in a contact-free manner and a housing 14 comprising an electric/electronic connection and, in given cases, electronic components, where the sensor element comprises a coil arrangement 1 whose windings 3 have a defined line width 5, line thickness 6, and line spacing 7 per layer 2 and whose layers 2 have a defined layer thickness 8b and, in given cases, a defined layer spacing 8a, characterized in that the sensor element is built up from ceramic layers in the sense of multi-layer ceramics and that with respect to traditional coil arrangements the layer thickness 8b or the layer spacing 8a is reduced and the number of windings per cross-sectional surface area is increased.
    Type: Grant
    Filed: August 3, 2012
    Date of Patent: May 24, 2016
    Assignee: MICRO-EPSILON Messtechnik GmbH & Co. KG
    Inventors: Torsten Thelemann, Tobias Schopf, Thomas Wisspeintner
  • Patent number: 9347762
    Abstract: Disclosed is a near-surface object sensing device, including a printed circuit board, a plurality of magnetic sensors arrayed on the printed circuit board to sense the magnetic field of an external magnetic object and generate a magnetic sensing signal, a multiplexer connected to the magnetic sensors for selecting and outputting the magnetic sensing signal, and a microprocessor connected to the multiplexer for receiving the magnetic sensing signal, wherein the microprocessor includes a sampling algorithm module for converting the magnetic sensing signal into a magnetic field distribution image, and a six-dimensional coordinate-calculating module for calculating six-dimensional coordinates of the external magnetic object. The sensing device of the invention is compact, low energy consuming and can accurately provide users with a convenient and intuitive user interface with three dimensional locations and position information in a near-surface space.
    Type: Grant
    Filed: April 18, 2013
    Date of Patent: May 24, 2016
    Assignee: National Taiwan University
    Inventors: Rong-Hao Liang, Bing-Yu Chen, Kai-Yin Cheng
  • Patent number: 9190949
    Abstract: The present invention relates to a system and a method for improving the use of energy in an electric motor by inducing currents generated from magnets and/or electromagnets that result in an increase of primary power and creating, directing and introducing a counter current obtained from primary coils of the motor into a resonant LC circuit which is introduced as a transient secondary process to increase the overall efficiency of the motor. Furthermore, the motor produces rotational torque without using alternating magnetic polarity, but rather magnetic compression that utilizes permanent magnets arranged in a dipolar manner around an axial plane and, in another embodiment, uses ferrous cores arranged in a dipolar manner around an axial plane or alternatively, electromagnetic dipoles arranged in a dipolar manner around an axial plane.
    Type: Grant
    Filed: February 15, 2012
    Date of Patent: November 17, 2015
    Assignee: Kress Motors, LLC
    Inventors: Timm A. Vanderelli, Rodney A. Carter
  • Patent number: 9190876
    Abstract: This disclosure provides systems, methods and apparatus for detecting wireless charging transmit characteristics. One aspect of the disclosure provides a method of detecting a transmit characteristic in a wireless power transmission device. The device includes a series element electrically coupled to a transmit coil. The method includes determining real and imaginary components of a first voltage at a first terminal of the series element. The method further includes determining real and imaginary components of a second voltage at a second terminal of the series element. The method further includes determining real and imaginary components of a current through the series element, based on the determined first and second voltages. The method further includes determining transmit characteristics such as nodal voltages, currents, power and impedances based on determined voltages and currents.
    Type: Grant
    Filed: March 13, 2013
    Date of Patent: November 17, 2015
    Assignee: QUALCOMM INCORPORATED
    Inventors: Gabriel Isaac Mayo, Ryan Tseng, Edward Kenneth Kallal
  • Patent number: 9052185
    Abstract: A rotation detecting device includes rotation detecting device includes a first supporting member and a second supporting member disposed around an axial line. The rotation detecting device further includes a pair of magnetic field generating portions for generating a magnetic field in a region between the first supporting member and the second supporting member. The rotation detecting device further includes at least one magnetic field detecting portion attached to the second supporting member for detecting the magnetic field. The rotation detecting device further includes a first magnetic member for covering one end portion of the magnetic field detecting portion and a second magnetic member for covering the other end portion of the magnetic field detecting portion.
    Type: Grant
    Filed: September 3, 2013
    Date of Patent: June 9, 2015
    Assignee: HIROSE ELECTRIC CO., LTD.
    Inventor: Shoji Oyama
  • Patent number: 9038483
    Abstract: Wireless strain and displacement sensors wirelessly monitor structural health and integrity, and are made by printing inductor-interdigital capacitor sensing circuits on a variety of substrates, including ceramic substrates, with thermally processable conductive inks. Sensors of the invention can be employed to detect strain and displacement of civil structures, such as bridges and buildings. The sensors include sensing elements that are mounted or printed on stiff, inflexible substrates, which prevent the sensing elements from bending, stretching, or otherwise warping when the sensor is strained. An interlayer between the sensing elements allows the sensing elements to move with respect to each other during application of strain. Thus, strain causes the sensing elements to move but not to deform, causing changes in sensor resonance that can be detected through wireless radio-frequency interrogation.
    Type: Grant
    Filed: September 7, 2010
    Date of Patent: May 26, 2015
    Assignee: University of Massachusetts
    Inventors: Ramaswamy Nagarajan, Jungrae Park, Sharavanan Balasubramaniam, Mario J. Cazeca, Shivshankar Sivasubramanian, Joey Mead, Julie Chen
  • Publication number: 20150137801
    Abstract: A method and apparatus for aligning a vehicle with an inductive charging system is characterized by the addition of alignment coils to a secondary coil on the vehicle. For efficient inductive charging, it is necessary that the vehicle mounted secondary coil be aligned with a stationary primary coil of a transformer of the inductive charging system. When the primary coil is energized, it produces a magnetic field which induces a voltage in the alignment coils as a function of the proximity of the alignment coils to the central axis of the primary coil. The voltage differential between opposed pairs of alignment coils is determined by a comparator which then generates a directional signal which can be used by the operator of the vehicle to position the vehicle for closer alignment of the vehicle secondary coil with the primary coil and more efficient charging.
    Type: Application
    Filed: September 22, 2014
    Publication date: May 21, 2015
    Inventors: Steven Raedy, Thomas Gattan Stout, II, James Brian Normann, Christopher Ryan Yahnker
  • Publication number: 20150129389
    Abstract: The present invention uses a sensor to determine when a pressure plate and a clutch plate of a dual clutch transmission system are in contact with one another. The assembly includes a housing having a plurality of pistons connected to both the clutch plate and pressure plate. The pistons contain either magnets or couplers and are positioned adjacent one another separated by either a Hall effect sensor or an inductive sensor. As the pressure plates and clutch plates come into contact with one another the pistons move within the housing and said movement is detected by the sensor. The sensor determines if the pressure plate is in contact with the clutch plate and if the clutch plate or the pressure plate has traveled any linear distance.
    Type: Application
    Filed: November 10, 2014
    Publication date: May 14, 2015
    Inventors: Lingmin Shao, Jim Hartford
  • Publication number: 20150130444
    Abstract: In a position detection device of a type that omits a secondary coil, various inconveniences arising from the use of a voltage-dividing resistance (fixed resistor) are eliminated. At least two pairs of coils are provided. A magnetism-responsive member are placed so as to effect relative displacement in relation to the coils, the relative position of the member in relation to the coils varies with a position of a detection object, and impedance of each coil is varied with the relative position. The impedance changes of two coils constituting each one of coil pairs present characteristics of mutually opposite phase characteristics. For each coil pair, the two coils constituting the pair are connected in series with each other, and from a connection point thereof, a voltage-divided output voltage according to the impedance of the two coils is taken out as a detection output signal for the pair.
    Type: Application
    Filed: May 13, 2013
    Publication date: May 14, 2015
    Inventors: Atsutoshi Goto, Daisuke Goto, Kazuya Sakamoto, Shuichi Tanaka
  • Patent number: 9024624
    Abstract: A magnetic tracking system includes a first set of magnetic field generators configured to produce a first magnetic field having a first shape within a three dimensional region and at least a second set of magnetic field generators configured to produce a second magnetic field having a second shape within the three dimensional region. The system also includes a computing device configured to compute a position of a sensor within the three dimensional region based on the first and second magnetic fields being detected by the sensor.
    Type: Grant
    Filed: March 10, 2011
    Date of Patent: May 5, 2015
    Assignee: Northern Digital Inc.
    Inventor: Georg Brunner
  • Patent number: 9024623
    Abstract: Techniques for coupling with devices that convert displacements into differential voltages and improvement of the sensitivity of such devices. A transducer operates based on changes of inductances between primary and secondary of a transformer to produce a differential signal that includes a noninverted signal and an inverted signal. A switch receives the noninverted signal and the inverted signal. A processor creates a square wave signal for driving the transducer input, and also digitally creates an inverted transducer output. A filter operates to filter the square wave output from the processor to produce a substantially single frequency signal at a specified timing having a specified phase relationship relative to the first phase inversion signal based on instructions that are executed by the processor.
    Type: Grant
    Filed: September 18, 2012
    Date of Patent: May 5, 2015
    Assignees: Oxford Instruments PLC, Oxford Instruments AFM, Inc
    Inventors: Dan Bocek, Roger Proksch
  • Patent number: 9013170
    Abstract: The present invention has an object to provide a lightning current detection sensor that has a configuration resistant to high voltage and high current in a lightning strike and has high sensitivity and high resolution. In a lightning current detection sensor 10, an insulation-coated wire 22 wound in multiple turns is collectively covered with a base tape 21 and a cover tape 23. Thus, even when the insulation-coated wire 22 is wound in multiple turns to increase sensitivity, a minute area can be detected to increase resolution. Also, with the base tape 21 and the cover tape 23 covering the insulation-coated wire 22 and also a shield portion 12 made of an insulating material and a gap 40 formed between the shield portion 12 and the coil portion 20, a sufficient shielding property is ensured and detection with high accuracy can be performed against high current and high voltage without capacitative coupling.
    Type: Grant
    Filed: January 25, 2012
    Date of Patent: April 21, 2015
    Assignee: Mitsubishi Aircraft Corporation
    Inventors: Kengou Yamaguchi, Tatsufumi Aoi, Takashi Okai