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公开(公告)号：US20220146286A1
公开(公告)日：2022-05-12
申请号：US17580049
申请日：2022-01-20
申请人： TDK CORPORATION
IPC分类号： G01D5/244
摘要： An angle sensor includes a plurality of magnetic sensors and a processor. The plurality of magnetic sensors generate a plurality of detection values representing directions of a composite magnetic field, which is a composite of a magnetic field to be detected and a noise magnetic field. The processor assumes a group of estimated unknowns. The group of estimated unknowns is a set of estimated values of a first, a second, and a third unknown. The first unknown corresponds to an angle detection value. The second unknown corresponds to the direction of the noise magnetic field. The third unknown corresponds to the strength of the noise magnetic field. The processor executes a process for determining the group of estimated unknowns a plurality of times, and assumes an estimated value of the first unknown in the last determined group of estimated unknowns as the angle detection value.
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公开(公告)号：US20210293538A1
公开(公告)日：2021-09-23
申请号：US17128018
申请日：2020-12-19
申请人： TDK Corporation
IPC分类号： G01C9/06
摘要： A magnetic sensor device includes first and second surfaces, and first and second inclined surfaces, which are inclined with respect to the first surface; first through third magnetic sensor units for detecting magnetism in first through third axial directions; and a signal processing unit that performs signal processing on the basis of first through third sensor signals output from the first through third magnetic sensor units. The first axial direction is a direction orthogonal to the first surface, and the second and third axial directions are directions orthogonal to each other on the first surface. The first and second magnetic sensor units are provided on the second inclined surface, respectively. A corrected signal generation unit included in the signal processing unit generates first and second corrected signals, which are the first and second sensor signals corrected in accordance with the inclination angles of the first and second inclined surfaces.
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公开(公告)号：US20190162609A1
公开(公告)日：2019-05-30
申请号：US16162586
申请日：2018-10-17
申请人： TDK Corporation
摘要： An operation processing apparatus that calculates a rotation angle based on a first output signal and a second output signal, which differ in signal frequency from each other, is provided with a first cross-coupled operation part that performs a first cross-coupled operation and a second cross-coupled operation part that performs a second cross-coupled operation based on the first and second output signals. A first Lissajous curve generation part generates a first Lissajous curve based on the result of operation by the first cross-coupled operation part, and a second Lissajous curve generation part generates a second Lissajous curve based on the result of operation by the second cross-coupled operation part. A rotation angle computing part calculates the rotation angle based on the first Lissajous curve and the second Lissajous curve.
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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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5.发明公开公开(公告)号：US20240247932A1
公开(公告)日：2024-07-25
申请号：US18618569
申请日：2024-03-27
申请人： TDK Corporation
CPC分类号： G01C9/06 , G01R33/0029 , G01R33/0052 , G01R33/0206 , G01R33/09
摘要： A magnetic sensor device includes first and second surfaces, and first and second inclined surfaces, which are inclined with respect to the first surface; first through third magnetic sensor units for detecting magnetism in first through third axial directions; and a signal processing unit that performs signal processing on the basis of first through third sensor signals output from the first through third magnetic sensor units. The first axial direction is a direction orthogonal to the first surface, and the second and third axial directions are directions orthogonal to each other on the first surface. The first and second magnetic sensor units are provided on the second inclined surface, respectively. A corrected signal generation unit included in the signal processing unit generates first and second corrected signals, which are the first and second sensor signals corrected in accordance with the inclination angles of the first and second inclined surfaces.
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公开(公告)号：US20230089798A1
公开(公告)日：2023-03-23
申请号：US17947654
申请日：2022-09-19
申请人： TDK CORPORATION
摘要： A magnetic sensor includes at least one sensor main body; a detection circuit provided on the at least one sensor main body, the detection circuit including a magnetic detection element; and a plurality of sensor terminals provided on the at least one sensor main body. The plurality of sensor terminals include a plurality of signal terminals and a plurality of power supply terminals. The plurality of signal terminals are all disposed on a side of one end of the at least one sensor main body. The plurality of power supply terminals include at least one first terminal disposed on the side of the one end of the at least one sensor main body, and a plurality of second terminals disposed on a side of another end of the at least one sensor main body.
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公开(公告)号：US20220196446A1
公开(公告)日：2022-06-23
申请号：US17691304
申请日：2022-03-10
申请人： TDK CORPORATION
摘要： An angle sensor generates an angle detection value based on a first and a second detection signal. A correction apparatus performs correction processing for generating a first corrected detection signal by adding a first correction value to the first detection signal and generating a second corrected detection signal by adding a second correction value to the second detection signal. When an angle to be detected varies with a period T and if no correction processing is performed, the angle detection value contains an Nth-order angle error component varying with a period of T/N. Each of the first and second detection signals contains an (N−1)th-order signal error component and an (N+1)th-order signal error component. The order of the first and second correction values is N−1 or N+1.
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公开(公告)号：US20200300665A1
公开(公告)日：2020-09-24
申请号：US16743126
申请日：2020-01-15
申请人： TDK CORPORATION
摘要： A magnetic sensor system includes a magnetic device and a signal processing circuit. The device generates first to third detection signals corresponding to components in three directions of a magnetic field generated by a magnetic field generator that is able to change its relative position with respect to the device. The circuit includes a longest segment extraction section and a midpoint coordinate computing section. With coordinates that represent a set of values of the first to third detection signals at a certain timing in an orthogonal coordinate system being taken as a measurement point, the longest segment extraction section extracts a first point and a second point that define a line segment having the greatest length among a plurality of measurement points at a plurality of timings. The midpoint coordinate computing section determines coordinates of a midpoint of the line segment defined by the first and second points.
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公开(公告)号：US20200166381A1
公开(公告)日：2020-05-28
申请号：US16671449
申请日：2019-11-01
申请人： TDK CORPORATION
IPC分类号： G01D5/244
摘要： An angle sensor includes a plurality of magnetic sensors and a processor. The plurality of magnetic sensors generate a plurality of detection values representing directions of a composite magnetic field, which is a composite of a magnetic field to be detected and a noise magnetic field. The processor assumes a group of estimated unknowns. The group of estimated unknowns is a set of estimated values of a first, a second, and a third unknown. The first unknown corresponds to an angle detection value. The second unknown corresponds to the direction of the noise magnetic field. The third unknown corresponds to the strength of the noise magnetic field. The processor executes a process for determining the group of estimated unknowns a plurality of times, and assumes an estimated value of the first unknown in the last determined group of estimated unknowns as the angle detection value.
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公开(公告)号：US20200025598A1
公开(公告)日：2020-01-23
申请号：US16513051
申请日：2019-07-16
申请人： TDK CORPORATION
摘要： An angle sensor generates an angle detection value based on a first and a second detection signal. A correction apparatus performs correction processing for generating a first corrected detection signal by adding a first correction value to the first detection signal and generating a second corrected detection signal by adding a second correction value to the second detection signal. When an angle to be detected varies with a period T and if no correction processing is performed, the angle detection value contains an Nth-order angle error component varying with a period of T/N. Each of the first and second detection signals contains an (N−1)th-order signal error component and an (N+1)th-order signal error component. The order of the first and second correction values is N−1 or N+1.
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