公开(公告)号：US20190170692A1

公开(公告)日：2019-06-06

申请号：US16313729

申请日：2017-06-09

申请人： HITACHI HIGH-TECH FINE SYSTEMS CORPORATION

发明人： Ryuzo KAWABATA ,  Akihiko KANDORI

IPC分类号： G01N27/72 ,  B61K9/08 ,  G01R33/12

摘要： In a rail inspection system, a positional deviation can be detected with accuracy. The rail inspection system includes a first sensor unit which is disposed to face a rail for a vehicle, and includes at least one receiver coil and at least one oscillation coil which are arranged in an arrangement direction intersecting with a layout direction of the rail, an AC voltage source which applies AC voltage to the oscillation coil, and a displacement detection unit which detects a displacement between the rail and the first sensor unit based on an induced voltage of the receiver coil. The first sensor unit is configured such that, when the displacement is a first displacement, a first maximum value appears in the induced voltage, and when the displacement is a second displacement, a second maximum value of which a phase is reversed against the first maximum value appears in the induced voltage.

公开(公告)号：US20190146045A1

公开(公告)日：2019-05-16

申请号：US15905574

申请日：2018-02-26

申请人： TAIWAN SEMICONDUCTOR MANUFACTURING CO., LTD.

发明人： Baohua NIU ,  Ji-Feng YING

IPC分类号： G01R33/26 ,  G01R33/12

CPC分类号： G01R33/26 ,  G01Q30/025 ,  G01Q60/08 ,  G01Q60/38 ,  G01Q60/52 ,  G01Q70/14 ,  G01R33/032 ,  G01R33/12 ,  G01R33/323

摘要： An apparatus for measuring a magnetic field strength is provided. The apparatus includes a stage on which a sample to be measured is placed, a cantilever having a tip, an optical system having a light source and a light receiver, and a microwave power source. The tip is a diamond tip having a nitrogen vacancy defect. The optical system is configured such that excitation light from the light source is focused at the diamond tip. The cantilever is configured as a coaxial microwave antenna through which microwaves from the microwave power source are supplied to the diamond tip.

公开(公告)号：US20190073548A1

公开(公告)日：2019-03-07

申请号：US16122594

申请日：2018-09-05

申请人： TOSHIBA TEC KABUSHIKI KAISHA

发明人： Tsuyoshi SANADA ,  Yuji KAWAMORITA

IPC分类号： G06K9/18 ,  G01R33/12 ,  G06K1/12 ,  H01F1/12 ,  B41J15/04

摘要： A magnetic ink reader includes a conveyance mechanism for a sheet, a magnetizing mechanism configured to magnetize magnetic ink on the sheet and including a magnet having a first side of a first magnetic polarity, that is arranged to face a first surface of the sheet, and a yoke that is formed of a soft magnetic material and includes a base portion attached directly to a second side of the magnet, and an extension portion extending from the base portion such that an end surface of the extension portion faces a second surface of the sheet, and a magnetic detection head along the conveyance path and configured to detect magnetism of the magnetized magnetic ink on the sheet. A first distance between the conveyance path and the first side of the magnet is less than a second distance between the conveyance path and the end surface of the yoke.

公开(公告)号：US10222438B2

公开(公告)日：2019-03-05

申请号：US14440268

申请日：2013-11-01

申请人： The Trustees of Dartmouth College

发明人： John B. Weaver ,  Alexander Hartov

IPC分类号： A61B5/055 ,  G01R33/48 ,  G01R33/12

摘要： A system for measuring responses of magnetic nanoparticles has static magnetic bias field along first axis, and AC driving coils providing AC magnetic field along second axis perpendicular to the first axis, both fields passing through an imaging zone. Sensing coils are oriented to sense fields parallel to the first axis, but not parallel to the second axis. A processor determines responses of nanoparticles in the imaging zone to the AC field. Another system has DC bias on first axis and AC driving coils providing an AC magnetic field along a second axes, magnetic gradient oriented along the first and/or second axis, and the second axis is rotated mechanically or electronically. The signal processor provides a voxel-based model of magnetic nanoparticle distribution in imaging zone. In some embodiments, the static magnet is a main magnet of a magnetic resonance imaging system.

公开(公告)号：US10215826B2

公开(公告)日：2019-02-26

申请号：US15000137

申请日：2016-01-19

申请人： Bruker BioSpin MRI GmbH

发明人： Ulrich Heinen ,  Jochen Franke

IPC分类号： G01R33/56 ,  G01R33/02 ,  G01R33/10 ,  G01R33/12 ,  A61B5/00 ,  A61B5/055 ,  G01R33/383 ,  G01R33/48 ,  A61B5/05

摘要： An MPI-apparatus comprising a magnet system for generating a time-varying and position-dependent magnetic field and a detection system detecting signals from MPI contrast agents exposed to said magnetic field within a detection volume, said signals being suitable for reconstructing an image of the spatial and temporal distribution of said MPI contrast agents, is characterized in that the magnet system comprises an array with a plurality of permanent magnetic elements geometrically arranged in such a way that at least a part of the plurality of permanent magnetic elements are moved with sufficient speed in the vicinity of the detection volume to create the spatial and temporal magnetic field variations for inducing within the contrast agent the MPI signals recorded by the detection system. This avoids the high power requirements of current MPI scanners, while opening the way for higher spatial resolutions and variable scanning frequencies.

公开(公告)号：US10215720B2

公开(公告)日：2019-02-26

申请号：US15284338

申请日：2016-10-03

申请人： Kevin D. McGushion

发明人： Kevin D. McGushion

IPC分类号： G01R33/12 ,  G01N24/08 ,  G01N27/72 ,  G01N29/275 ,  G01N29/22 ,  G01R33/022 ,  G01R33/028

摘要： The present device relates to a sensor capable of detecting changes in the electromagnetic field it generates when in proximity to either conductive or nonconductive materials. This occurs by way of oscillating a transmit coil with an electro motive force at a resonant frequency thus creating an electromagnetic field. The magnetic field passes through a target of either conductive or nonconductive material and is then intercepted by a receive coil which likewise oscillates at a resonant frequency, which when in proximity to the transmit coil and transmit coils resonant frequency produces an enhanced signal by way of the interaction of the respective resonant frequencies and receive coil output.

公开(公告)号：US10210888B1

公开(公告)日：2019-02-19

申请号：US15631887

申请日：2017-06-23

申请人： Western Digital Technologies, Inc.

发明人： Zhanjie Li ,  Suping Song ,  Michael Kuok San Ho

IPC分类号： G11B5/31 ,  G11B5/127 ,  G11C11/18 ,  G01R33/12 ,  H01L27/22 ,  H01L43/04 ,  H01L43/08 ,  G11B5/00

摘要： The present disclosure generally relates to data storage devices, and more specifically, to a magnetic media drive employing a magnetic recording head. The head includes a main pole, a trailing shield, and an oscillator located between the main pole and the trailing shield. The oscillator is disposed at a media facing surface (MFS). The oscillator includes a spin-torque layer sandwiched between two distinct spin Hall layers. The two distinct spin Hall layers generate spin-orbit torque (SOT) that induces in-plane precessions on opposite surfaces of the spin-torque layer, and both in-plane precessions are in the same direction. The same-direction in-plane precessions on opposite surfaces of the spin-torque layer reduce the critical current of the oscillation of the oscillator, leading to high quality recording.

公开(公告)号：US10209323B2

公开(公告)日：2019-02-19

申请号：US15476067

申请日：2017-03-31

申请人： Northwestern University

发明人： Bruce W. Wessels ,  Steven J. May

IPC分类号： H01L29/82 ,  G01R33/12 ,  B82Y25/00 ,  G01R33/09 ,  H01L29/267 ,  H01L43/08 ,  H01L43/10

摘要： Ferromagnetic Group III-V semiconductor/non-magnetic Group III-V semiconductor heterojunctions, with a magnetodiode device, to detect heterojunction magnetoresistance responsive to an applied magnetic field.

公开(公告)号：US10196754B2

公开(公告)日：2019-02-05

申请号：US15231085

申请日：2016-08-08

申请人： NORTH CAROLINA STATE UNIVERSITY

发明人： Jagdish Narayan

IPC分类号： C30B29/04 ,  C30B31/00 ,  H01L21/02 ,  H01L29/00 ,  C30B13/10 ,  C01B21/064 ,  C30B13/24 ,  C23C14/06 ,  C23C14/28 ,  C30B23/02 ,  C30B23/06 ,  C30B29/40 ,  C30B19/08 ,  C30B29/62 ,  C30B31/06 ,  C30B31/22 ,  H01L21/268 ,  H01F1/42 ,  G01R33/12 ,  H03B15/00 ,  G01R33/032 ,  C01B32/05 ,  C01B32/188 ,  C01B32/25 ,  H01L43/10

摘要： Using processes disclosed herein, materials and structures are created and used. For example, processes can include melting boron nitride or amorphous carbon into an undercooled state followed by quenching. Exemplary new materials disclosed herein can be ferromagnetic and/or harder than diamond. Materials disclosed herein may include dopants in concentrations exceeding thermodynamic solubility limits. A novel phase of solid carbon has structure different than diamond and graphite.

公开(公告)号：US10184959B2

公开(公告)日：2019-01-22

申请号：US14935804

申请日：2015-11-09

申请人： Murata Manufacturing Co., Ltd.

发明人： Zhenhong Zhang

IPC分类号： G01R15/20 ,  G01R33/09 ,  G01R33/12 ,  G01R19/00

摘要： A magnetic current sensor including a Wheatstone bridge circuit formed of four magnetoresistance devices; bias magnetic field application that applies a bias magnetic field to the magnetoresistance devices; and air-core coils provided on both sides of the Wheatstone bridge circuit. The Wheatstone bridge circuit generates a voltage corresponding to an induction magnetic field generated by a current to be measured flowing through the air-core coils. According to the magnetic current sensor and current measurement method, the linearity between a current and an output voltage is near 0 mA as a result of magnetic hysteresis being suppressed, and an increase in current and a reduction in size and cost are realized as a result of insulation between the current circuit side and the MR device side being excellent.