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公开(公告)号：US20230258473A1
公开(公告)日：2023-08-17
申请号：US18140094
申请日：2023-04-27
申请人： TDK CORPORATION
摘要： A position detection device includes a first position detector, a second position detector, and a signal generator. The first position detector includes a first magnetic field generation unit, a second magnetic field generation unit, and a first magnetic sensor. The second position detector includes a third magnetic field generation unit, a fourth magnetic field generation unit, and a second magnetic sensor. The positions of the second and fourth magnetic field generation units vary in response to variations in a detection-target position. The signal generator generates a position detection signal, which is the sum of a first detection signal generated by the first magnetic sensor and a second detection signal generated by the second magnetic sensor. Each of the first and second position detectors includes a bias magnetic field generation unit.
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公开(公告)号：US20220333953A1
公开(公告)日：2022-10-20
申请号：US17713583
申请日：2022-04-05
申请人： TDK CORPORATION
发明人： Tsuyoshi UMEHARA , Hiraku HIRABAYASHI , Yongfu CAI
摘要： A magnetic sensor includes first to fourth resistors, a power supply port, a ground port, a first output port, and a second output port. The first resistor and the second resistor are located in a first region and connected in series via a first connection point connected to the first output port. The third resistor and the fourth resistor are located in a second region and connected in series via a second connection point connected to the second output port, at least a part of the second region being located at a position different from the first region in a direction parallel to an X direction. The first and second resistors are located between the third and fourth resistors in a direction parallel to a Y direction.
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公开(公告)号：US20210123992A1
公开(公告)日：2021-04-29
申请号：US17036104
申请日：2020-09-29
申请人： TDK Corporation
发明人： Kentaro HARADA , Tsuyoshi UMEHARA , Kenichi TAKANO
IPC分类号： G01R33/09
摘要： A magnetic sensor is provided that can attenuate a magnetic field in a direction that is perpendicular to the magnetic field detecting direction at a higher rate than the magnetic field in the magnetic field detecting direction.
Magnetic sensor 1 has: first soft magnetic layer 3; a pair of second soft magnetic layers 4A, 4B that is positioned at a location that is different from first soft magnetic layer 3 in the Z direction of first soft magnetic layer 3; and magnetic field detecting element 2 that is positioned between first soft magnetic layer 3 and second soft magnetic layers 4A, 4B in the Z direction, wherein magnetic field detecting element 2 has a magnetic field detecting direction that is parallel to a direction in which the pair of second soft magnetic layers 4A, 4B is arranged. As viewed in the Z direction, second soft magnetic layers 4A, 4B are positioned on both sides of a center of first soft magnetic layer 3, and magnetic field detecting element 2 is positioned inside of a periphery of first soft magnetic layer 3.-
4.发明申请公开(公告)号：US20170030742A1
公开(公告)日：2017-02-02
申请号：US15181904
申请日：2016-06-14
申请人： TDK CORPORATION
发明人： Shinichirou MOCHIZUKI , Hiraku HIRABAYASHI , Hiroshi NAGANUMA , Tsuyoshi UMEHARA , Yuichiro YAMAJI
IPC分类号： G01D5/244
CPC分类号： G01D5/24476 , G01D5/145
摘要： A correction apparatus for an angle sensor includes a correction information generator for generating correction information, and a correction processing unit for performing correction processing in the course of generation of a detected angle value by an angle detector. Details of the correction processing are determined on the basis of the correction information. The correction information generator includes an error estimate generation unit and a correction information determination unit. The error estimate generation unit generates, on the basis of a first signal and a second signal, an error estimate containing a variable component that varies depending on an ideal angle estimate. The correction information determination unit determines the correction information on the basis of the error estimate.
摘要翻译： 一种用于角度传感器的校正装置包括用于产生校正信息的校正信息发生器和用于通过角度检测器产生检测角度值的过程中执行校正处理的校正处理单元。 基于校正信息确定校正处理的细节。 校正信息发生器包括误差估计生成单元和校正信息确定单元。 误差估计生成单元基于第一信号和第二信号生成包含根据理想角度估计而变化的可变分量的误差估计。 校正信息确定单元基于误差估计来确定校正信息。
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公开(公告)号：US20230280419A1
公开(公告)日：2023-09-07
申请号：US18172796
申请日：2023-02-22
申请人： TDK CORPORATION
发明人： Tsuyoshi UMEHARA , Kentaro Harada , Yongfu Cai
CPC分类号： G01R33/093 , G01R33/091 , G01D5/12 , G01B7/003
摘要： In a magnetic sensor, first and second resistors are provided in a path that connects a power supply port and a first output port, and third and fourth resistors are provided in a path that connects a ground port and the first output port. In a direction parallel to an X direction, both of a distance between the first resistor and the second resistor and a distance between the third resistor and the fourth resistor are λ/2, and a distance between the first resistor and the third resistor is zero. A magnetization of a magnetization pinned layer in the first and fourth resistors contains a component in a −X direction. The magnetization of the magnetization pinned layer in the second and third resistors contains a component in the X direction.
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6.发明申请公开(公告)号：US20230052013A1
公开(公告)日：2023-02-16
申请号：US17971822
申请日：2022-10-24
申请人： TDK Corporation
摘要： A magnetic sensor comprises a magnetoresistive effect element including a first side surface and a second side surface facing in opposite directions along a first axis and a first end surface and a second end surface facing in opposite directions along a second axis substantially orthogonal to the first axis. The sensor has a sensitivity axis extending in a direction of the first axis, a first yoke unit provided adjacent to the first side surface of the magnetoresistive effect element, and a first bias magnetic field generation unit provided adjacent to the first end surface of the magnetoresistive effect element. The first bias magnetic field generation unit is provided to be capable of applying a bias magnetic field on the magnetoresistive effect element and the first yoke unit.
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公开(公告)号：US20220214409A1
公开(公告)日：2022-07-07
申请号：US17703495
申请日：2022-03-24
申请人： TDK CORPORATION
摘要： This sensor unit includes a base having a substantially-rectangular planar shape including a first side and a second side that are substantially orthogonal to each other, and a plurality of first sensors provided on the base and arranged on a first axis. The first axis is substantially parallel to the first side and passes through a center position of the base.
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公开(公告)号：US20220128345A1
公开(公告)日：2022-04-28
申请号：US17502724
申请日：2021-10-15
申请人： TDK Corporation
发明人： Kentaro HARADA , Tsuyoshi UMEHARA
摘要： Magnetic sensor assembly 1 has first member 10 having first to third magnetic sensors 13A to 13C, and second member 20 having first to third magnets 22A to 22C. Second member 20 can be moved in X and Y directions and can be rotated about a Z axis relative to first member 10. Output of first to third magnetic sensors 13A to 13C monotonously changes. A change of the output of first magnetic sensor and a change of the output of second magnetic sensor are different from each other. First to third magnets are positioned on first to third straight lines L1 to L3. A first angle that is formed between first straight line L1 and X axis, a second angle that is formed between second straight line L2 and X axis, and a third angle that is formed between third straight line L3 and Y axis are same.
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公开(公告)号：US20210018337A1
公开(公告)日：2021-01-21
申请号：US17064873
申请日：2020-10-07
申请人： TDK CORPORATION
发明人： Kenzo MAKINO , Tsuyoshi UMEHARA
IPC分类号： G01D5/16
摘要： A magnetic sensor generates a detection signal that varies according to the strength of a target magnetic field at a detection position in a reference plane. The magnetic sensor includes a magnetoresistive element. The magnetoresistive element includes a magnetization pinned layer having a magnetization in a first direction, and a free layer having a magnetization whose direction is variable according to the direction of an acting magnetic field, the acting magnetic field being a composite magnetic field of all magnetic fields acting on the free layer. The free layer has uniaxial magnetic anisotropy such that an easy axis of magnetization is oriented in a direction parallel to a second direction. In the reference plane, both of two directions orthogonal to the second direction are different from the direction of the target magnetic field.
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公开(公告)号：US20220334201A1
公开(公告)日：2022-10-20
申请号：US17852956
申请日：2022-06-29
申请人： TDK Corporation
发明人： Kentaro HARADA , Tsuyoshi UMEHARA , Kenichi TAKANO
IPC分类号： G01R33/09
摘要： A magnetic sensor is provided that can attenuate a magnetic field in a direction that is perpendicular to the magnetic field detecting direction at a higher rate than the magnetic field in the magnetic field detecting direction.
Magnetic sensor 1 has: first soft magnetic layer 3; a pair of second soft magnetic layers 4A, 4B that is positioned at a location that is different from first soft magnetic layer 3 in the Z direction of first soft magnetic layer 3; and magnetic field detecting element 2 that is positioned between first soft magnetic layer 3 and second soft magnetic layers 4A, 4B in the Z direction, wherein magnetic field detecting element 2 has a magnetic field detecting direction that is parallel to a direction in which the pair of second soft magnetic layers 4A, 4B is arranged. As viewed in the Z direction, second soft magnetic layers 4A, 4B are positioned on both sides of a center of first soft magnetic layer 3, and magnetic field detecting element 2 is positioned inside of a periphery of first soft magnetic layer 3.
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