公开(公告)号：US12078694B2

公开(公告)日：2024-09-03

申请号：US17624967

申请日：2020-07-29

申请人： Google LLC

发明人： Aditya Shailesh Ghadiali ,  William Alan Saperstein

IPC分类号： G01R33/038 ,  G01D5/14 ,  G01R33/07 ,  G08B13/14 ,  G08B13/196 ,  H04N23/50 ,  H04N23/667

CPC分类号： G01R33/038 ,  G01D5/145 ,  G01R33/072 ,  G08B13/149 ,  G08B13/19632 ,  H04N23/50 ,  H04N23/667

摘要： An electronic device including a mounting device configured to couple to a surface, a head removably coupled to the mounting device and including a housing, a magnet attached to the mounting device, and a sensor disposed within the housing. The sensor detects a magnetic field associated with the magnet when the head is in a first position relative to the mounting device and detects the magnetic field associated with the magnet when the head is in a second position relative to the mounting device, the second position being different than the first position.

公开(公告)号：US11874343B2

公开(公告)日：2024-01-16

申请号：US18112229

申请日：2023-02-21

申请人： Trustees of Boston University

发明人： Joshua Javor ,  David Bishop ,  David Campbell ,  Matthias Imboden

IPC分类号： G01R33/022 ,  G01R33/038 ,  G01R33/00

CPC分类号： G01R33/022 ,  G01R33/0052 ,  G01R33/038 ,  G01R33/0385

摘要： A gradiometer includes a at least one magnet attached to a beam. The magnet moves in response to a magnetic force. A sensing element is configured to measure movement or deflection of the beam or magnet. The gradiometer is configured to determine a gradient of a magnetic field acting on the first magnet based on movement of the magnet. The gradiometer can further measure higher order gradients.

公开(公告)号：US10001533B2

公开(公告)日：2018-06-19

申请号：US15125982

申请日：2015-04-06

申请人： GLORY LTD.

发明人： Naoki Ueyama

IPC分类号： G01R33/02 ,  G01R33/12 ,  G01R33/038 ,  G01R33/028 ,  G07D7/04 ,  G01N27/72 ,  G01R33/09 ,  G01N33/34

CPC分类号： G01R33/12 ,  G01N27/72 ,  G01N33/34 ,  G01N33/346 ,  G01R33/0206 ,  G01R33/028 ,  G01R33/038 ,  G01R33/09 ,  G01R33/1215 ,  G07D7/04

摘要： A magnetic property determination apparatus that determines the magnetic materials on a paper sheet transported through a transport path includes a magnetization unit and a magnetic detection unit. The magnetization unit generates a magnetization magnetic field including a first magnetic field region and a second magnetic field region on the transport path. A magnetic field intensity and a magnetic field direction are set different between the first magnetic field region and the second magnetic field region so that the magnetic materials are magnetized in different magnetization directions depending on coercive forces of the magnetic materials. The magnetic detection unit that generates a bias magnetic field on the transport path downstream in a transport direction of the magnetization unit, and that detects a magnetic charge of the magnetic materials by detecting variations of the bias magnetic field.

公开(公告)号：US09923025B2

公开(公告)日：2018-03-20

申请号：US14482898

申请日：2014-09-10

申请人： Honeywell International Inc.

发明人： Romney R. Katti ,  Bryan C. Westberg

IPC分类号： H01L29/82 ,  H04R23/00 ,  H01L27/22 ,  H01L43/02 ,  H01L43/08 ,  H01L43/12 ,  H01L43/10 ,  G11C11/16 ,  H01L29/06 ,  G01R33/038

CPC分类号： H01L27/222 ,  G01R33/038 ,  G11C11/16 ,  G11C11/1659 ,  G11C11/1675 ,  H01L29/0665 ,  H01L29/0673 ,  H01L43/02 ,  H01L43/08 ,  H01L43/10 ,  H01L43/12

摘要： A magnetoresistive random access memory (MRAM) die may include a plurality of MRAM cells, and a magnetic field sensing structure. The magnetic field sensing structure may include a movable portion and a magnetic material attached to the movable portion. The movable portion may move in response to exposure of the magnetic material to an external magnetic field.

公开(公告)号：US20170184687A1

公开(公告)日：2017-06-29

申请号：US15325418

申请日：2015-07-06

申请人： EPCOS AG

发明人： Bernhard Ostrick ,  Wolfgang Schreiber-Prillwitz

IPC分类号： G01R33/00 ,  G01R33/09 ,  G01R33/038

CPC分类号： G01R33/0005 ,  G01C19/5719 ,  G01L1/122 ,  G01L5/164 ,  G01L9/007 ,  G01L9/14 ,  G01L19/06 ,  G01P15/105 ,  G01R33/0047 ,  G01R33/038 ,  G01R33/093

摘要： A sensor is disclosed. In an embodiment, the sensor includes a fixed structure, a movable structure movable relative to the fixed structure, a magnet configured to generate a magnetic field and a first magnetically sensitive element configured to determine the magnetic field at a position of the first magnetically sensitive element. The magnet is fastened to the fixed structure and the first magnetically sensitive element is fastened to the movable structure. Alternatively, the magnet is fastened to the movable structure and the first magnetically sensitive element is fastened to the fixed structure.

公开(公告)号：US09671471B2

公开(公告)日：2017-06-06

申请号：US14446248

申请日：2014-07-29

申请人： STMicroelectronics S.r.l.

发明人： Giacomo Langfelder ,  Alessandro Tocchio ,  Dario Paci

IPC分类号： G01R33/028 ,  G01R33/038

CPC分类号： G01R33/0283 ,  G01R33/0064 ,  G01R33/0213 ,  G01R33/028 ,  G01R33/0286 ,  G01R33/038 ,  H01L41/08 ,  H01L41/1132

摘要： A magnetic-field sensor, including: a die, a current generator in the die. The current generator generating a driving current. A Lorentz force transducer also in the die and being configured to obtain measurements of magnetic field based upon the Lorentz force is coupled to the current generator. The transducer having a resonance frequency. The current generator is such that the driving current has a non-zero frequency different from the resonance frequency.

公开(公告)号：US09557178B2

公开(公告)日：2017-01-31

申请号：US14450890

申请日：2014-08-04

申请人： Tata Consultancy Services Ltd.

发明人： Avik Ghose ,  Arpan Pal ,  Anirban Dutta Choudhury ,  Vivek Chandel ,  Chirabrata Bhaumik ,  Tanushyam Chattopadhyay

IPC分类号： G01C21/20 ,  G01R33/038 ,  H04W4/04 ,  H04W64/00

CPC分类号： G01C21/206 ,  G01R33/038 ,  H04W4/04 ,  H04W64/00

摘要： An indoor positioning system and method of localizing a person/object in an indoor environment by identifying the orientation and direction of a person/object to provide a true location of the person/object without navigation errors. The system comprises magnets disposed on a doorway to create a unique magnetic field; a wireless communication unit comprising a magnetometer sensor to sense perturbations in each of the unique magnetic fields in the event that the person/object with the wireless communication unit passes through the doorway, and generate corresponding signals; a processor receiving the signals and extracting data from the same; and a backend server wirelessly communicating with the wireless communication unit, the backend server processing the data sample received from the wireless communication unit to identify the opening and the wireless communication unit to localize the person/object.

摘要翻译： 一种室内定位系统和方法，其通过识别人/物体的方向和方向来定位人/物体在室内环境中，以提供人/物体的真实位置而不导航错误。 该系统包括设置在门口上以产生唯一磁场的磁体; 一种无线通信单元，包括磁力计传感器，用于在与无线通信单元的人/物体通过门口的情况下感测每个独特磁场中的扰动，并产生相应的信号; 处理器接收信号并从其中提取数据; 以及与所述无线通信单元无线通信的后端服务器，所述后端服务器处理从所述无线通信单元接收到的所述数据样本，以识别所述开放部分，以及所述无线通信单元以使所述人/物体本地化。

公开(公告)号：US20160282144A1

公开(公告)日：2016-09-29

申请号：US14978660

申请日：2015-12-22

申请人： TDK CORPORATION

发明人： Yosuke KOMASAKI

IPC分类号： G01D5/16 ,  G01R33/09 ,  G01R33/038 ,  H01F7/02

CPC分类号： G01R33/038 ,  G01R33/09 ,  G01R33/093 ,  H01F7/0273

摘要： A magnetic sensor includes an MR element and two bias magnetic field generation units. The two bias magnetic field generation units are spaced apart from each other along a first direction and configured to cooperate with each other to generate a bias magnetic field. Each bias magnetic field generation unit includes a ferromagnetic layer and an antiferromagnetic layer stacked along a second direction orthogonal to the first direction. An element placement region is formed between the two bias magnetic field generation units when viewed in the second direction in an imaginary plane perpendicular to the second direction and intersecting the MR element. The element placement region includes a middle region and two end regions. The MR element is placed to lie within the middle region in the imaginary plane.

摘要翻译： 磁传感器包括MR元件和两个偏置磁场产生单元。 两个偏置磁场产生单元沿着第一方向彼此间隔开并且被配置为彼此配合以产生偏置磁场。 每个偏置磁场产生单元包括沿着与第一方向正交的第二方向堆叠的铁磁层和反铁磁层。 当在与第二方向垂直的虚拟平面中沿第二方向观察并且与MR元件相交时，在两个偏置磁场产生单元之间形成元件放置区域。 元件放置区域包括中间区域和两个端部区域。 MR元件放置在虚拟平面中的中间区域内。

公开(公告)号：US09383267B2

公开(公告)日：2016-07-05

申请号：US13907624

申请日：2013-05-31

申请人： Purdue Research Foundation

发明人： Lokesh Anilkumar Gupta ,  Dimitrios Peroulis

IPC分类号： G01K7/00 ,  G01K7/38 ,  G01R33/038 ,  F16J15/34 ,  G01K7/36 ,  G01N25/72 ,  G01R33/07 ,  G01K13/08

CPC分类号： G01K7/38 ,  F16J15/3492 ,  G01K7/36 ,  G01K13/08 ,  G01N25/72 ,  G01R33/038 ,  G01R33/07

摘要： A system for measuring a physical characteristic of a bearing includes a permanent magnet and a magnetic sensor. The permanent magnetic is coupled to at least a portion of a bearing, and has a magnetic field that changes as a function of the physical characteristic. For example, the permanent magnet has a magnetic characteristic that changes as a function of temperature. The magnetic sensor is operably disposed in a magnetic field sensing relationship with the permanent magnet, and is configured to generate a voltage signal and/or current signal corresponding to a sensed magnetic field.

摘要翻译： 用于测量轴承的物理特性的系统包括永磁体和磁传感器。 永久磁铁耦合到轴承的至少一部分，并且具有作为物理特性的函数而变化的磁场。 例如，永磁体具有作为温度的函数而变化的磁特性。 磁传感器可操作地设置在与永磁体的磁场感应关系中，并被配置为产生对应于检测到的磁场的电压信号和/或电流信号。

公开(公告)号：US09348002B2

公开(公告)日：2016-05-24

申请号：US14622101

申请日：2015-02-13

申请人： Continental Automotive Systems, Inc.

发明人： Craig Andrew Weldon ,  Raymond Rasokas

IPC分类号： G01B7/30 ,  G01R33/038 ,  G01R31/34 ,  G01R33/00

CPC分类号： G01R33/038 ,  G01B7/30 ,  G01R31/34 ,  G01R33/0035

摘要： A method of measuring flux density and run out to accommodate rotors of different diameters, evaluate intrinsic properties of magnet material and the magnetization process. Circular run out measurement capability is also used to evaluate bearing journal “ovality.” The method includes the use of a scan tool, or a DLA Rotor Flux Density Scan Fixture, which evaluates the electromagnetic field strength (gauss), combined with surface run out and presents the data in a scalable pictorial format. The scan tool includes a probe which measures a magnetic field strength and circular run out of the perimeter of the magnet. Simultaneously, a non-contact measurement sensor is used to measure the rotor surface for subtle variations. The resulting sine wave gauss data and the surface dimension data are manipulated into a scalable “radar” plot. The radar plot correlates magnetic pole field strength and surface circular run out variation to the index position.