With Means To Create Magnetic Field To Test Material Patents (Class 324/228)
  • Patent number: 10377574
    Abstract: Provided is a conveyor belt wear monitoring system including a non-contact sensor arranged facing a surface of an upper cover rubber. A distance to the surface of the upper cover rubber is detected using the non-contact sensor in a predetermined range in a belt width direction of the upper cover rubber of the traveling conveyor belt. An amount of wear of the upper cover rubber is obtained by comparing the detection data with pre-stored reference data.
    Type: Grant
    Filed: March 10, 2016
    Date of Patent: August 13, 2019
    Assignee: The Yokohama Rubber Co., LTD.
    Inventor: Gang Hou
  • Patent number: 10338260
    Abstract: Detection of contained metal contained in an article can be carried out with a high sensitivity with a simple operation in a limited space. A transmission coil 42 that generates a magnetic field for inspection from an upper surface side through a lower surface side of a placing table 21 and a plurality of magnetic sensors 43 for detecting the magnetic field are provided in a head 40 disposed on a lower surface side of the placing table 21 for placing an article which is an inspection object. When the head 40 is scanned so as to cover the entire lower surface-side region of the placing table 21, metal being contained in the article placed on the placing table 21 is detected on the basis of a change in the magnetic field being detected by the magnetic sensors 43.
    Type: Grant
    Filed: August 1, 2018
    Date of Patent: July 2, 2019
    Inventors: Yoshifumi Takahashi, Osamu Tanaka, Kazunori Sakata
  • Patent number: 10326429
    Abstract: A receiver and a common-mode voltage calibration method thereof are provided. The receiver includes sensing circuits, a phase comparator, and a self-calibration circuit. The phase comparator compares phase relationships of the latch results at the output terminals of the sensing circuits during a testing period to produce a phase comparison result. During the testing period, the self-calibration circuit provides the same differential signal to the input terminals of these sensing circuits, and sets common-mode levels at the input terminals of these sensing circuits to be different from one another. The self-calibration circuit determines a calibrated common-mode level based on the phase comparison result. The self-calibration circuit sets the common-mode levels at the input terminals of these sensing circuits to be equal to the calibrated common-mode level during a normal operation period.
    Type: Grant
    Filed: August 3, 2018
    Date of Patent: June 18, 2019
    Assignee: Faraday Technology Corp.
    Inventor: Ming-Chi Lin
  • Patent number: 10254352
    Abstract: A conductivity distribution derivation method for deriving a conductivity distribution within a battery having an electrode plate that is flat includes: obtaining magnetic field information indicating a magnetic field; and deriving, based on a plurality of relational expressions which (i) an x component of a magnetic field vector in an x direction parallel to the electrode plate, (ii) a y component of the magnetic field vector in a y direction parallel to the electrode plate and perpendicular to the x direction, (iii) the conductivity distribution on a two-dimensional plane parallel to the electrode plate, and (iv) an electric potential distribution on a two-dimensional plane parallel to the electrode plate satisfy, the conductivity distribution that satisfies the plurality of relational expressions with respect to the magnetic field information.
    Type: Grant
    Filed: March 11, 2015
    Date of Patent: April 9, 2019
    Inventors: Kenjiro Kimura, Noriaki Kimura
  • Patent number: 10215875
    Abstract: A method of operation of a variable frequency metal detector having a driver circuit for establishing an alternating magnetic field in a coil system so as to generate an output signal at a given frequency, said driver circuit comprises a plurality of switches being arranged to cause the coil system to be driven at a frequency determined by the operation of the plurality switches, the method comprising the steps of generating an adjustable balance signal, combining the adjustable balance signal with the output signal of the detector, and varying the adjustable balance signal so as to provide a compensated signal whereby the output signal and/or the adjustable balance signal is filtered to remove one or more harmonics.
    Type: Grant
    Filed: February 7, 2013
    Date of Patent: February 26, 2019
    Inventors: John Colin Moore, Colin Michael Tagg
  • Patent number: 10197650
    Abstract: In a method, device and magnetic resonance apparatus for determining basic shim settings for shim elements of a magnetic resonance scanner of the apparatus, an optimization function is established in a processor, which includes multiple optimization parameters, including a first optimization parameter that designates a homogeneity value of a spatial distribution of the basic magnetic field in the scanner, and a second optimization parameter that designates a value of a force acting on the shim elements. The processor is configured to calculate the spatial distribution of the shim elements by minimizing the optimization function, dependent on the first and second parameters. Shim settings for the scanner are determined using the calculated spatial distribution of the shim elements.
    Type: Grant
    Filed: November 25, 2015
    Date of Patent: February 5, 2019
    Assignee: Siemens Aktiengesellschaft
    Inventor: Andrew Dewdney
  • Patent number: 10197526
    Abstract: A gas sensor includes a field effect transistor supported on an oxide layer of a substrate, the field effect transistor having a doped source (p+ doped for T-FET and n+ doped for FET) and an n+ doped drain separated by an channel region (intrinsic for T-FET or slightly p-doped for FET), and a floating gate separated from the channel region by a gate oxide, a passivation layer covering the floating gate, and a sensing layer supported by the passivation layer, the sensing layer comprising nanofibers.
    Type: Grant
    Filed: August 29, 2016
    Date of Patent: February 5, 2019
    Assignee: Honeywell International Inc.
    Inventors: Cornel P. Cobianu, Bogdan-Catalin Serban, Viorel Georgel Dumitru, Octavian Buiu, Alisa Stratulat, Mihai Brezeanu
  • Patent number: 10197639
    Abstract: For locating a ferromagnetic object, a device has a non-magnetic housing with a perimeter wall, a front surface, and a rear surface. The perimeter wall defines a chamber within the housing. A stop element is located within the chamber between the front surface and the rear surface. A magnet element is housed within the chamber and is movable between a resting position, where the magnet element is proximate the stop element, and an active position, where the magnet element is proximate the front surface. The device has a mechanism for returning the magnet element to the resting position in the absence of a ferromagnetic object located proximate the front end of the device.
    Type: Grant
    Filed: December 2, 2011
    Date of Patent: February 5, 2019
    Assignee: Diamond Resource, LLC
    Inventor: John Blake
  • Patent number: 10198917
    Abstract: A mobile emergency light device includes a casing (1), a moving closure cover (2), a translucent lens (3), an electronic circuit board (5) for control, and a combined reflector (4), in which the combined reflector (4) has an inverted bell shape and is open at both ends, in which the electronic circuit board is securely connected to the combined reflector (4), and provided with a plurality of light-emitting diodes (LED), suitably angled towards the combined reflector (4), and in which the casing (1) forms inside this a cylindrical cavity (13), whose interior houses an automatic switch, driven by the base of the casing approaching a ferromagnetic material.
    Type: Grant
    Filed: April 21, 2017
    Date of Patent: February 5, 2019
    Assignee: Netun Solutions, S.L.
    Inventor: Jorge Torre Sarmiento
  • Patent number: 10122192
    Abstract: This disclosure provides systems, methods and apparatus for detecting a presence of an object. In one aspect an apparatus for detecting a presence of an object is provided. The apparatus includes a sense coil formed from a conductor having a predetermined shape configured to attenuate currents induced in the conductor by an external time-varying magnetic field. The sense coil has an electrical characteristic that varies as a function of the presence of the object. The apparatus comprises a detection circuit coupled to the sense coil and configured to detect the presence of the object in response to detecting a difference between a measured value of the electrical characteristic and a reference value for the electrical characteristic. The reference value for the electrical characteristic is substantially the same as the measured value of the electrical characteristic in the absence of the object over at least a portion of the sense coil.
    Type: Grant
    Filed: August 4, 2015
    Date of Patent: November 6, 2018
    Assignee: QUALCOMM Incorporated
    Inventors: Swagat Chopra, Leandro Alberto Percebon, Michael Werner
  • Patent number: 10096416
    Abstract: Disclosed is a magnetizing apparatus including: a placing table configured to place thereon a storage container storing a plurality of substrates; a magnetizing chamber configured to accommodate the storage container and apply a magnetic field to the plurality of substrates in the storage container; and a conveying mechanism configured to convey the storage container from the placing table into the magnetizing chamber.
    Type: Grant
    Filed: August 22, 2016
    Date of Patent: October 9, 2018
    Assignee: Tokyo Electron Limited
    Inventors: Tadashi Enomoto, Makoto Saito
  • Patent number: 10088453
    Abstract: An aspect of the present disclosure may provide a defect detection apparatus and method for a steel plate, in which a defect in a steel plate may be detected, and particularly, only an inner defect in the steel plate may be detected, even with a relatively low amplification rate.
    Type: Grant
    Filed: December 24, 2013
    Date of Patent: October 2, 2018
    Assignee: POSCO
    Inventors: Ju-Seung Lee, Chang-Hyun Park, Geon Shin, Sang-Woo Choi, Shin-Hwan Kang, Ho-Moon Bae, Ki-Jang Oh
  • Patent number: 10078148
    Abstract: A method for detecting an electrically conductive target in soil using a metal detector, including the steps of: processing a receive signal using at least two different functions for producing at least two processed signals, each of the processed signals is at least partly insensitive to at least one unwanted signal due to the soil or an electromagnetic interference noise; determining a noise level of each of the at least two processed signals for producing at least two noise signals; and producing, from at least one of the at least two processed signals, an indicator output signal indicative of the presence of the electrically conductive target when the electrically conducting target is within the influence of a transmit magnetic field transmitted by the metal detector; wherein the step of producing an indicator output signal is dependent upon characteristics of the at least two noise signals.
    Type: Grant
    Filed: November 25, 2014
    Date of Patent: September 18, 2018
    Assignee: Minelab Electronics Pty Limited
    Inventor: Bruce Halcro Candy
  • Patent number: 10031253
    Abstract: Buried object locators including an omnidirectional antenna array and a gradient array are disclosed. A locator display may include information associated with a buried object based on both omnidirectional antenna array signals and gradient antenna array signals.
    Type: Grant
    Filed: October 31, 2016
    Date of Patent: July 24, 2018
    Assignee: SEESCAN, INC.
    Inventors: Mark S. Olsson, Ray Merewether, Michael J. Martin, Ryan B. Levin
  • Patent number: 9876890
    Abstract: An air quality monitor carried by a smart phone and an air quality monitoring system carried by the smart phone are provided. The quality monitor carried by the smart phone includes a shell body, wherein a sensor is provided inside the shell body; a plug is provided on the shell body for being connected to the smart phone; a signal output terminal and a power input terminal of the sensor are both connected to the plug; wherein no power source or power source managing module is provided inside the shell body; no display module is provided on the shell body. Product weight and volume are greatly reduced, in such a manner that a product of the present invention is easy to carry. An air quality monitoring system carried by a smart phone includes: the smart phone, wherein the smart phone comprises a port and a signal processing system.
    Type: Grant
    Filed: July 10, 2017
    Date of Patent: January 23, 2018
    Assignee: Shanghai Eawada Environmental Technology CO., Ltd
    Inventors: Shangxin Shi, Yi Zhang
  • Patent number: 9871288
    Abstract: A vehicular door handle system includes a door handle assembly for a door of a vehicle. The door handle assembly includes a door handle portion that is graspable by a user to open the vehicle door. The door handle assembly includes an antenna circuit for a passive entry system of the vehicle. The antenna circuit includes at least an inductor in series electrical connection with a capacitor. The antenna circuit includes a resistor in series electrical connection with the inductor of the antenna circuit and the capacitor of the antenna circuit. The series electrical connection includes one of (i) the resistor being disposed between the inductor and the capacitor of the antenna circuit and (ii) the resistor not being disposed between the inductor and the capacitor of the antenna circuit. The resistor functions to reduce the Q factor of the antenna circuit.
    Type: Grant
    Filed: October 31, 2016
    Date of Patent: January 16, 2018
    Inventor: Robert J. Dykhouse
  • Patent number: 9835569
    Abstract: A magnetic measurement system includes an X-ray source, a monochromator that converts right- and left-polarization X-ray into right- and left-monochromatic X-ray, an aperture slit that allows the right- and left-monochromatic X-ray to pass through, an analytical section, and piezoelectric scanning devices. The analytical section has a Fresnel zone plate that receives and focuses the right- and left-monochromatic X-ray on a single point being 10 nm or less wide of a magnetic sample, an order-sorting aperture that allows the focused X-ray to selectively pass through, a sample-stage that sets a comparatively thick magnetic sample that is more than 150 nm thick and less than or equal to 1000 nm thick to be irradiated with the X-ray, and an X-ray-detector that detects transmittance of transmission X-ray passing through the comparatively thick sample and that generates X-ray magnetic circular dichroism (XMCD) data by directly measuring the detected transmittance of the transmission X-ray.
    Type: Grant
    Filed: March 28, 2017
    Date of Patent: December 5, 2017
    Inventors: Masao Yano, Kanta Ono
  • Patent number: 9767096
    Abstract: Systems, methods, and tangible, non-transitory, computer readable media is described herein. For example, a system includes a portable non-destructive testing (NDT) device. The NDT device includes a display, a user interface, a memory storing an operations object having a first text in a first language, and a processor. The processor is configured to present the first text on the operations object via the display during an operation of the portable NDT device, and wherein the processor is configured to create a second text in a second language via the user interface of the NDT device, and to present the second text on the operations object as an alternative to the first text via the display during the operation of the NDT device.
    Type: Grant
    Filed: May 30, 2014
    Date of Patent: September 19, 2017
    Assignee: General Electric Company
    Inventors: Chen Goldberger, Bryan David Maule, Thomas Charles Ward, Thomas Durkee Britton
  • Patent number: 9761371
    Abstract: The present invention relates to a coil type unit for wireless power transmission, a wireless power transmission device, an electronic device, and a manufacturing method of a coil type unit for wireless power transmission. A coil type unit for wireless power transmission according to the present invention includes a coil pattern in the form of a wiring pattern; a magnetic portion having the coil pattern attached to one surface thereof; and an adhesive portion interposed between the magnetic portion and the coil pattern to bond the magnetic portion and the coil pattern, wherein the magnetic portion is formed by laminating one or more conductive sheets with one or more magnetic sheets and integrally firing the laminated sheets, and the magnetic portion has conductive holes in the position, where both ends of the coil pattern are disposed, to electrically connect the both ends of the coil pattern and the conductive sheet.
    Type: Grant
    Filed: July 15, 2014
    Date of Patent: September 12, 2017
    Inventors: No Il Park, Jang Su Kim, Doo Sung Jung, Seung Wook Park
  • Patent number: 9714987
    Abstract: A fluxgate sensor including a magnetic-to-digital converter (MDC) can be adapted to measure an external magnetic field BEXT with a bandwidth fB. The MDC forward path can include: (a) converting an analog sense signal from the fluxgate sense coil to corresponding oversampled digital data using an oversampling data converter with an oversampling frequency fS greater than fB; and (b) loop filtering the oversampled digital data, synchronous with the oversampling frequency fS, to generate the loop output digital data. The MDC feedback path can include: (a) generating the feedback compensation current ICOMP from the loop output digital data, synchronous with a feedback path frequency fFB equal to ((M/N)×fS), where, M and N are integers; and (b) injecting the feedback compensation current ICOMP into the fluxgate compensation coil to induce the compensation field BCOMP, such that the induced compensation field BCOMP nulls the external field BEXT.
    Type: Grant
    Filed: March 21, 2014
    Date of Patent: July 25, 2017
    Inventors: Sayyed Mahdi Kashmiri, Willem J. Kindt
  • Patent number: 9714920
    Abstract: A detection system comprising a plurality of magnetic field generators and a plurality of magnetic field detectors located adjacent to a detection area, and a control system arranged to generate magnetic field using the generators, and, for each of the generators, to make measurements of the magnetic field generated using each of the detectors, and processing means arranged to process the measurements to generate a data set characterizing the detection area.
    Type: Grant
    Filed: September 6, 2013
    Date of Patent: July 25, 2017
    Inventors: William Robert Breckon Lionheart, Anthony Peyton, Xiandong Ma
  • Patent number: 9664755
    Abstract: A sensor package includes a magnetic field sensor, where the magnetic field sensor includes an in-plane sense element and a flux guide configured to direct a magnetic field oriented perpendicular to a plane of the magnetic field sensor into the plane. A current carrying structure is positioned proximate the flux guide and circuitry is coupled to the current carrying structure. The current carrying structure includes a continuous coil having multiple substantially parallel conductive segments connected by additional conductive segments oriented Perpendicular to the parallel conductive segments to form a continuous series of loops. The circuitry is configured to provide an electric current to the continuous coil such that the electric current flows through each of the parallel conductive segments, wherein the electric current generates a magnetic field, and the magnetic field is applied to the flux guide to recondition a magnetic polarization of the flux guide.
    Type: Grant
    Filed: January 21, 2014
    Date of Patent: May 30, 2017
    Assignee: NXP USA, Inc.
    Inventors: Paige M. Holm, Lianjun Liu
  • Patent number: 9658192
    Abstract: In a general methodology for insulation defect identification in a generator core, a Chattock coil is used to measure magnetic potential difference between teeth. Physical knowledge and empirical knowledge is combined in a model to predict insulation damage location and severity. Measurements are taken at multiple excitation frequencies to solve for multiple characteristics of the defect.
    Type: Grant
    Filed: January 16, 2013
    Date of Patent: May 23, 2017
    Assignees: Siemens Corporation, Siemens Energy, Inc.
    Inventors: Xuefei Guan, Jingdan Zhang, Shaohua Kevin Zhou, Mark W. Fischer, Waheed A. Abbasi, Scott A. Karstetter, Christopher John William Adams
  • Patent number: 9660523
    Abstract: A system and method allows for controlling a resonant switched-mode converter to provide a variable conversion ratio. The system and method operates to control the switching devices such that the impedance of the switched-mode converter is set to a plurality of configurations for a plurality of time intervals. The system and method may further include off-time modulation techniques for varying or maintaining the overall switching period of the switched-mode converter.
    Type: Grant
    Filed: February 6, 2015
    Date of Patent: May 23, 2017
    Inventors: Jason T. Stauth, Kapil Kesarwani, Christopher Schaef
  • Patent number: 9612134
    Abstract: A method of sensing a sliding by a sensor including grouping one or more Hall elements into one or more groups, measuring magnetic field strength generated by a magnetic field source, and comparing the magnetic field strength at the one or more Hall elements to determine whether a horizontal sliding occurs.
    Type: Grant
    Filed: March 5, 2014
    Date of Patent: April 4, 2017
    Assignee: Magnachip Semiconductor, Ltd.
    Inventors: Seung-hwan Park, Hyung-nam Jin
  • Patent number: 9541612
    Abstract: A method for measuring a first magnetic field and the temperature of a magneto-resistive transducer includes producing, by the magneto-resistive transducer, a measurement signal dependent on the intensity of the first magnetic field and on the temperature of the magneto-resistive transducer. The method includes establishing a measurement of the intensity of the first magnetic field on the basis of the measurement signal produced and a measurement of the temperature of the magneto-resistive transducer. The method also includes generating a second magnetic field to combine with the first magnetic field to form a resultant magnetic field. The method further includes extracting from the measurement signal, the component which is dependent solely on the second magnetic field and establishing the temperature of the magneto-resistive transducer on the basis of the component extracted.
    Type: Grant
    Filed: March 29, 2013
    Date of Patent: January 10, 2017
    Assignees: Commissariat à l'énergie atomique et aux énergies alternatives, Renault S.A.S.
    Inventors: Sylvain Bacquet, Frédéric Auzas, Bertrand Delaet
  • Patent number: 9488647
    Abstract: A method detects magnetic particles (1) bound to a binding surface (111) of a sample chamber (112). The detection is made during and/or immediately after the action of an attractive magnetic field. The attractive magnetic field (B) is preceded by a repulsive magnetic field (B) which removes unbound magnetic particles away from the binding surface (111). Due to the attractive magnetic field (B), bound magnetic particles (1) come closer to the binding surface (111), which increases the signal of surface specific detection techniques like frustrated total internal reflection. The signal can be achieved by an attractive magnetic field that is parallel to the binding surface (111) thus inducing the generation of chains between unbound and bound magnetic particles.
    Type: Grant
    Filed: October 31, 2012
    Date of Patent: November 8, 2016
    Inventors: Joannes Baptist Adrianus Dionisius Van Zon, Ron Martinus Laurentius Van Lieshout
  • Patent number: 9383208
    Abstract: A system that incorporates the subject disclosure may include, for example, a method for producing an electrical signal from an apparatus comprising an induction coil coupled to a mechanical resonator, wherein the electrical signal has an operating frequency proportional to a mechanical resonating frequency of the mechanical resonator and proportional to a change in a magnetic flux resulting from a change in orientation in the apparatus, detecting with a detection circuit a change in the electrical signal resulting from a change in the magnetic flux caused by the change in orientation in the apparatus, and determining a direction of the apparatus according to the change in the electrical signal. Other embodiments are disclosed.
    Type: Grant
    Filed: October 12, 2012
    Date of Patent: July 5, 2016
    Assignee: Analog Devices, Inc.
    Inventor: Pritiraj Mohanty
  • Patent number: 9366096
    Abstract: Embodiments of the present disclosure include a system having a clamping mechanism configured to apply a force on a first tool joint and a second tool joint, wherein the clamping mechanism is configured to transfer a torque from the first tool joint to the second tool joint, and the clamping mechanism is configured to rotate about an axis of the first and second tool joints.
    Type: Grant
    Filed: October 30, 2012
    Date of Patent: June 14, 2016
    Inventors: Ryan Thomas Bowley, Edgar Fernando Yajure
  • Patent number: 9335385
    Abstract: SQUIDs may detect local magnetic fields. SQUIDS of varying sizes, and hence sensitivities may detect different magnitudes of magnetic fields. SQUIDs may be oriented to detect magnetic fields in a variety of orientations, for example along an orthogonal reference frame of a chip or wafer. The SQUIDS may be formed or carried on the same chip or wafer as a superconducting processor (e.g., a superconducting quantum processor). Measurement of magnetic fields may permit compensation, for example allowing tuning of a compensation field via a compensation coil and/or a heater to warm select portions of a system. A SQIF may be implemented as a SQUID employing an unconventional grating structure. Successful fabrication of an operable SQIF may be facilitated by incorporating multiple Josephson junctions in series in each arm of the unconventional grating structure.
    Type: Grant
    Filed: August 18, 2014
    Date of Patent: May 10, 2016
    Assignee: D-Wave Systems Inc.
    Inventors: Trevor Michael Lanting, Paul I. Bunyk, Andrew J. Berkley, Richard G. Harris, Sergey V. Uchaykin, Andrew Brock Wilson, Mark Johnson
  • Patent number: 9335383
    Abstract: A magnetic field generating device includes a triaxial Helmholtz coil 3, amounting table 4 on which a portable device 2 is mounted, a current supplying part 5 and a controlling part 6. The current supplying part 5 supplies current I to individual three monoaxial Helmholtz coils 30 which construct the triaxial Helmholtz coil 3. The controlling part 6 changes the current flowing through the individual monoaxial Helmholtz coils 30 in such a manner that a synthetic magnetic field of a magnetic field generated within the triaxial Helmholtz coil 3 by the current I and an external magnetic field which acts from the outside into the triaxial Helmholtz coil 3 acts on a triaxial magnetic sensor 20 within the portable device 2 mounted on the mounting table 4 from a plurality of predetermined directions.
    Type: Grant
    Filed: November 12, 2014
    Date of Patent: May 10, 2016
    Inventors: Masahiko Fukasawa, Masaaki Nakada, Ryuji Kambara
  • Patent number: 9329295
    Abstract: A device for locating a ferromagnetic object has a non-magnetic housing with a front end, a rear end, and a perimeter wall defining a chamber within the housing. A ferromagnetic member is housed within the chamber in a substantially fixed position. A magnet element is housed within the chamber between the front end and the ferromagnetic member, wherein the magnet element is reversibly movable between a first position in which the magnet element is proximate the ferromagnetic member, and a second position in which the magnet element is proximate the front end.
    Type: Grant
    Filed: January 8, 2013
    Date of Patent: May 3, 2016
    Inventors: John Blake, David Lee Still
  • Patent number: 9285437
    Abstract: A hall effect current sensor including a mounting bracket, a sensor assembly, and a sensor core. The sensor assembly includes a flux sensor. The sensor core includes a first portion and a second portion. The first portion and the second portion define a first air gap and a second air gap between the first portion and the second portion. The first air gap is adapted to receive the sensor assembly.
    Type: Grant
    Filed: October 2, 2013
    Date of Patent: March 15, 2016
    Assignee: Rockwell Automation Technologies, Inc.
    Inventors: Robert G Rushmer, Jeffrey Annis, Richard D Marasch, Greg Voborsky
  • Patent number: 9214937
    Abstract: An inductive proximity sensor and a method comprising a transmitter coil, a receiver coil, an excitation device which is connected to the transmitter coil and an evaluation device, wherein the evaluation device is designed to generate an output signal which depends on a voltage ratio between a transmission voltage of the transmitter coil and/or of the excitation device and a reception voltage of the receiver coil, wherein the excitation device is designed to generate a sinusoidal radio frequency transmission voltage. An inductive proximity sensor and a method comprising a transmitter coil, a receiver coil, an excitation device which is connected to the transmitter coil and an evaluation device, wherein the evaluation device is designed to generate an output signal which is dependent on a reception voltage of the receiver coil, wherein the excitation device is designed to generate a sinusoidal radio frequency transmission voltage with a constant amplitude.
    Type: Grant
    Filed: July 25, 2012
    Date of Patent: December 15, 2015
    Assignee: Sick AG
    Inventors: Sascha Thoss, André Lissner
  • Patent number: 9075091
    Abstract: Sensor devices and related methods disclosed. One example sensor device includes a non-magnetic substrate defining an aperture structured to receive a conductor therein, a coil including a plurality of coil turns wound about at least a portion of the substrate, a first shield between the substrate and the plurality of coil turns, a second shield disposed proximate to the plurality of coil turns, opposite the first shield, such that the plurality of coil turns is disposed between the first shield and the second shield, and a filter element coupled to at least one of the first and second shields.
    Type: Grant
    Filed: September 9, 2011
    Date of Patent: July 7, 2015
    Assignee: General Electric Company
    Inventors: Subramanyam Satyasurya Chamarti, Steven Lee Bietz
  • Patent number: 9069028
    Abstract: Provided is a stud finder for determining the location of a stud within a wall. The stud finder includes a body having an internal compartment formed therein which is sized and configured to house a magnetic element therein. The stud finder is moveable along the wall to place the magnetic element in magnetic attraction with metallic fasteners (i.e., nails, screws, etc) disposed within the stud, such as for securing drywall to the stud. The magnetic attraction urges the magnetic element toward the metallic element to provide a visual indication as to the precise location of the metallic element, as well as the underlying stud.
    Type: Grant
    Filed: October 14, 2011
    Date of Patent: June 30, 2015
    Inventors: Emmett J. Ebner, Brian J. Huffer
  • Patent number: 9018946
    Abstract: An integrated magnetic-field sensor designed to detect an external magnetic field, comprising a first magnetoresistive structure for detecting the external magnetic field, the first magnetoresistive structure including first magnetoresistive means having a main axis of magnetization and a secondary axis of magnetization set orthogonal to one another. The magnetic-field sensor further comprises a magnetic-field generator, including a first portion configured for generating a first magnetic field having field lines in a first field direction, and a second portion, which is coplanar and is connected to the first portion, configured for generating a second magnetic field having field lines in a second field direction, the first magnetoresistive means being configured so that the main axis of magnetization extends parallel to the first field direction, and the secondary axis of magnetization extends parallel to the second field direction.
    Type: Grant
    Filed: December 21, 2011
    Date of Patent: April 28, 2015
    Assignee: STMicroelectronics S.R.L.
    Inventors: Dario Paci, Sarah Zerbini
  • Patent number: 9013175
    Abstract: A reading circuit for a magnetic-field sensor, generating an electrical detection quantity as a function of a detected magnetic field and of a detection sensitivity, is provided with an amplification stage, which is coupled to the magnetic-field sensor and generates an output signal as a function of the electrical detection quantity and of an amplification gain. In particular, the amplification gain is electronically selectable, and the reading circuit is moreover provided with a calibration stage, integrated with the amplification stage and configured so as to vary a value of the amplification gain in such a way as to compensate a variation of the detection sensitivity with respect to a nominal sensitivity value.
    Type: Grant
    Filed: November 22, 2011
    Date of Patent: April 21, 2015
    Assignee: STMicroelectronics S.r.l.
    Inventors: Carlo Alberto Romani, Enrico Pozzati, Fabio Bottinelli
  • Patent number: 9000759
    Abstract: A magnetic sensor for discriminating between high and low coercivity magnets is disclosed. The sensor comprises a first magnetic field operable to orient high and low coercivity magnets in a first magnetic orientation. The sensor also comprises a second magnetic field, lower in strength than the first magnetic field, and operable to orient only the low coercivity magnets in a second magnetic orientation opposite to the first magnetic orientation. The sensor further comprises a sensor for ascertaining the magnetic orientation of each of the magnets and thereby identifying if a magnet is a high coercivity magnet or a low coercivity magnet.
    Type: Grant
    Filed: December 22, 2010
    Date of Patent: April 7, 2015
    Assignee: NCR Corporation
    Inventors: Gary Ross, Adam Camilletti, Andrew Nicholas Dames, Edward G Colby
  • Patent number: 8991594
    Abstract: A rubber magnet (3) includes a plate-like diagonal portion (21) and a plate-like parallel portion (22) which are both magnetized in a thickness direction, the diagonal portion (21) extending in a conveyor belt width direction while linearly extending, in section in a conveyor belt length direction, from an outer side end (3b), which is closer to the front-side surface (2a), to an inner side end (3a), which is away from the front-side surface (2a), while being at an angle to the front-side surface (2a), the parallel portion (22) being formed continuously from the inner side end (3a) of the diagonal portion, so as to be arranged parallel to the front-side surface (2a).
    Type: Grant
    Filed: November 11, 2010
    Date of Patent: March 31, 2015
    Assignee: Bridgestone Corporation
    Inventors: Tomoki Nakamura, Toshiki Sakaguchi
  • Publication number: 20150084622
    Abstract: The object of the present invention is to provide a method, system and apparatus that are capable of measuring magnetic characteristic of crystal grains composing magnetic polycrystalline materials in the magnetic field or nonmagnetic field by X-ray magnetic circular dichroism. In particular, the present invention is capable of measuring the magnetic characteristic of comparatively very thick materials.
    Type: Application
    Filed: September 25, 2014
    Publication date: March 26, 2015
    Inventors: Masao YANO, Kanta ONO
  • Patent number: 8988070
    Abstract: A pulse-induction type metal detector using a transmitter coil energizing pulse that selectively reduces the amplitude of background signals from conductive soils, ores and salt water. The detector can be operated with higher amplification of the received signals than conventional detectors, without driving the input amplifier into saturation. This makes it possible to detect land mines, tramp metal and gold in media whose characteristics make detection with conventional metal detectors difficult.
    Type: Grant
    Filed: January 23, 2012
    Date of Patent: March 24, 2015
    Inventor: Allan Westersten
  • Patent number: 8981018
    Abstract: The condition of internal or hidden material layers or interfaces is monitored and used for control of a process that changes a condition of a material system. The material system has multiple component materials, such as layers or embedded constituents, or can be represented with multiple layers to model spatial distributions in the material properties. The material condition changes as a result of a process performed on the material, such as by cold working, or from functional operation. Sensors placed proximate to the test material surface or embedded between material layers are used to monitor a material property using magnetic, electric, or thermal interrogation fields. The sensor responses are converted into states of the material condition, such as temperature or residual stress, typically with a precomputed database of sensor responses.
    Type: Grant
    Filed: March 14, 2005
    Date of Patent: March 17, 2015
    Assignee: Jentek Sensors, Inc.
    Inventors: Neil J. Goldfine, Vladimir A. Zilberstein, Ian C. Shay, Christopher A. Craven, David C. Grundy, Volker Weiss, Andrew P. Washabaugh
  • Patent number: 8977511
    Abstract: A method for classifying electrical sheet is produced. The electrical sheet is used to produce an electrical machine and is available in the form of a strip roll wherein a magnetic flux that changes over time and that causes a shape change of the strip roll and magnetic losses is produced in the strip roll using an excitation winding fed by a feeding device, the shape change and/or the magnetic losses are measured using a measuring device and the measurement signal obtained is fed to an evaluation device, and the evaluation device categorizes the electrical sheet in regard to noise emission and/or magnetic losses using the measurement signal.
    Type: Grant
    Filed: July 29, 2009
    Date of Patent: March 10, 2015
    Assignee: Siemens Aktiengesellschaft Österreich
    Inventor: Helmut Pregartner
  • Patent number: 8952686
    Abstract: A system includes a magnetoresistive (MR) bridge circuit, a magnetic field sensor, and an adjustable load. The MR bridge circuit receives a supply voltage and generates an output voltage that indicates a strength/direction of a magnetic field. The MR bridge circuit includes first and second MR elements connected in series between a supply node and a ground node, and third and fourth MR elements connected in series between the supply node and the ground node. The output voltage is generated between a first node that is common to the first and second MR elements and a second node that is common to the third and fourth MR elements. The sensor generates signals based on the strength/direction of the magnetic field. The adjustable load is connected in parallel with one of the MR elements, and has a resistance that is controlled based on the signals generated by the sensor.
    Type: Grant
    Filed: October 25, 2011
    Date of Patent: February 10, 2015
    Assignee: Honeywell International Inc.
    Inventor: Perry A. Holman, Jr.
  • Publication number: 20150035521
    Abstract: The present invention relates to a portable metal detector adapted for detection of dangerous metallic items carried by individuals, for example during access to a departure lounge in an airport, comprising a casing which houses a transmitter/receiver winding, the casing being extended by a gripping and handling handle, and a processor which feeds a loop of the winding to generate a magnetic field and which detects perturbations of the magnetic field caused by the environment, characterised in that the detector comprises a sensor for detecting orientation of the detector in a vertical position of the handle and which, when the detector is in a vertical position, activates a single dynamic detection mode of the winding whereas, when the detector is in another position, it activates a static operating mode of the winding.
    Type: Application
    Filed: August 5, 2014
    Publication date: February 5, 2015
    Inventor: Alessandro Manneschi
  • Patent number: 8947078
    Abstract: A measuring apparatus for sensing metal articles, comprises a transmission coil for producing a magnetic field, two reception coils, which are oriented relative to one another, and electrically connected to one another, in the region of the magnetic field such that a resulting received voltage on the reception coils is zero when the magnetic field acts on both reception coils in the same way, a control device configured to supply the transmission coil with an alternating transmission voltage, and a determination device configured to determine the metal article on the basis of the received voltage. In this arrangement, the control device is further configured to control RMS value for the transmission voltage such that the received voltage remains below a predetermined threshold value.
    Type: Grant
    Filed: July 29, 2011
    Date of Patent: February 3, 2015
    Assignee: Robert Bosch GmbH
    Inventors: Markus Hahl, Christoph Wieland, Andrej Albrecht
  • Publication number: 20150008910
    Abstract: A magnetic particle imaging apparatus includes magnets [106,107] that produce a gradient magnetic field having a field free region (FFR), excitation field electromagnets [102,114] that produce a radiofrequency magnetic field within the field free region, high-Q receiving coils [112] that detect a response of magnetic particles in the field free region to the excitation field. Field translation electromagnets create a homogeneous magnetic field displacing the field-free region through the field of view (FOV) allowing the imaging region to be scaled to optimize scan time, scanning power, amplifier heating, SAR, dB/dt, and/or slew rate. Efficient multi-resolution scanning techniques are also provided. Intermodulated low and radio-frequency excitation signals are processed to produce an image of a distribution of the magnetic nanoparticles within the imaging region. A single composite image is computed using deconvolution of multiple signals at different harmonics.
    Type: Application
    Filed: July 10, 2014
    Publication date: January 8, 2015
    Inventors: Patrick W. Goodwill, Steven M. Conolly
  • Patent number: 8928314
    Abstract: A magnetic detection apparatus comprises: a magnetic detection section which is obtained by pressing a base including a magnetic detection device, and magnetic field generation means fixed to the base, into a cap so as to integrate the base, the magnetic field generation means, and the cap; and a secondary molding section including an attachment section for attaching the magnetic detection section, and a connector section for extracting a signal detected by the magnetic detection section.
    Type: Grant
    Filed: December 8, 2011
    Date of Patent: January 6, 2015
    Assignee: Mitsubishi Electric Corporation
    Inventors: Shigeki Tsujii, Mitsuhiro Ono, Hiroshi Kobayashi
  • Publication number: 20140375308
    Abstract: A magnetic measurement device which can measure the magnetic characteristics in a microregion of a thin plate magnetic sample. After a magnetic sample is applied by a magnetic field and magnetized accordingly, by scanning the magnetic sample using a measuring part, the magnetic flux leakage in the magnetic sample can be measured. The magnetic flux leaks outside by magnetizing a first region and a second region of the magnetic sample in reciprocally opposite directions and reducing the demagnetizing field. Specifically, a magnetic field generating part with at least a pair of magnetic poles is used to perform the magnetization of multiple poles, or the magnetic field generating part applies a damped oscillation magnetic field to perform the magnetization, or a local magnetic field generating part which applies an alternating magnetic field and scans the surface of the sample at the same time is used to perform the magnetization.
    Type: Application
    Filed: December 13, 2012
    Publication date: December 25, 2014
    Inventors: Kenichi Suzuki, Tsutomu Chikamatsu, Akio Ogawa, Kyung-ku Choi, Ryuji Hashimoto