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公开(公告)号：US08736256B2
公开(公告)日：2014-05-27
申请号：US13205209
申请日：2011-08-08
IPC分类号： G01B7/30
CPC分类号： G01R33/093 , B82Y25/00 , G01D5/145
摘要： A rotating field sensor includes a first detection circuit that outputs a first signal indicating the intensity of a component of a rotating magnetic field in a first direction, a second detection circuit that outputs a second signal indicating the intensity of a component of the rotating magnetic field in a second direction, and an arithmetic circuit that calculates a detected angle value based on the first and second signals. Each of the first and second detection circuits includes at least one MR element row. Each MR element row is composed of a plurality of MR elements connected in series. Each MR element has a magnetization pinned layer. The plurality of MR elements forming each MR element row include one or more pairs of MR elements. Magnetization directions of the magnetization pinned layers in two MR elements making up a pair form a predetermined relative angle other than 0° and 180°.
摘要翻译： 旋转场传感器包括：第一检测电路，输出表示第一方向上的旋转磁场的分量的强度的第一信号;第二检测电路，输出表示旋转磁场的分量强度的第二信号 以及算术电路，其基于第一和第二信号计算检测角度值。 第一和第二检测电路中的每一个包括至少一个MR元件行。 每个MR元件行由串联连接的多个MR元件组成。 每个MR元件具有磁化固定层。 形成每个MR元件行的多个MR元件包括一对或多对MR元件。 构成一对的两个MR元件中的磁化钉扎层的磁化方向形成除了0°和180°之外的预定相对角度。
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公开(公告)号：US08909489B2
公开(公告)日：2014-12-09
申请号：US13176485
申请日：2011-07-05
CPC分类号： G01R33/093 , B82Y25/00 , G01D5/145
摘要： A first detection unit has first and second detection circuits. A second detection unit has third and fourth detection circuits. Output signals of the second and fourth detection circuits differ from output signals of the first and third detection circuits in phase, respectively, by an odd number of times ¼ the signal period. The output signal of the third detection circuit differs from the output signal of the first detection circuit in phase by an integer multiple of ⅙ the signal period other than an integer multiple of ½ the signal period. A rotating field sensor generates a first signal based on the output signals of the first and third detection circuits, generates a second signal based on the output signals of the second and fourth detection circuits, and calculates a detected angle value based on the first and second signals.
摘要翻译： 第一检测单元具有第一和第二检测电路。 第二检测单元具有第三和第四检测电路。 第二和第四检测电路的输出信号分别与第一和第三检测电路的输出信号分别相差奇数倍的信号周期。 第三检测电路的输出信号与第一检测电路的输出信号相位不同于信号周期的整数倍，除了信号周期的1/2的整数倍。 旋转场传感器基于第一和第三检测电路的输出信号产生第一信号，基于第二和第四检测电路的输出信号产生第二信号，并基于第一和第二检测电路计算检测角度值 信号。
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公开(公告)号：US08604780B2
公开(公告)日：2013-12-10
申请号：US13164427
申请日：2011-06-20
申请人： Shunji Saruki , Hiraku Hirabayashi
发明人： Shunji Saruki , Hiraku Hirabayashi
CPC分类号： G01R33/091 , G01D5/145
摘要： A field generation unit generates a rotating magnetic field including a first partial magnetic field in a first position and a second partial magnetic field in a second position. The first and second partial magnetic fields differ in direction by 180° and rotate in the same direction of rotation. A first detection unit located in the first position has first and second detection circuits whose output signals differ in phase by ¼ the period. A second detection unit located in the second position has third and fourth detection circuits whose output signals differ in phase by ¼ the period. A detected value of the angle that the direction of the rotating magnetic field in a reference position forms with respect to a reference direction is calculated based on a first signal generated from the output signals of the first and third detection circuits and a second signal generated from the output signals of the second and fourth detection circuits.
摘要翻译： 场产生单元产生包括第一位置的第一部分磁场和第二位置的第二局部磁场的旋转磁场。 第一和第二部分磁场在180°方向上不同，并且沿相同的旋转方向旋转。 位于第一位置的第一检测单元具有第一和第二检测电路，其输出信号的相位相差1/4。 位于第二位置的第二检测单元具有第三和第四检测电路，其输出信号的相位相差1/4。 基于从第一和第三检测电路的输出信号产生的第一信号和从第一和第三检测电路产生的第二信号来计算基准位置中相对于参考方向形成的旋转磁场的方向的角度的检测值 第二和第四检测电路的输出信号。
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公开(公告)号：US08659289B2
公开(公告)日：2014-02-25
申请号：US13166409
申请日：2011-06-22
申请人： Shunji Saruki , Hiraku Hirabayashi
发明人： Shunji Saruki , Hiraku Hirabayashi
CPC分类号： G01R33/093 , B82Y25/00
摘要： A field generation unit generates a rotating magnetic field including a first partial magnetic field in a first position and a second partial magnetic field in a second position. The first and second partial magnetic fields differ in direction by 180° and rotate in the same direction of rotation. A first detection unit detects, in the first position, a first angle that the direction of a first applied field forms with respect to a first direction. The first applied field includes the first partial magnetic field as its main component. A second detection unit detects, in the second position, a second angle that the direction of a second applied field forms with respect to a second direction. The second applied field includes the second partial magnetic field as its main component. A detected value of the angle that the direction of the rotating magnetic field in a reference position forms with respect to a reference direction is calculated based on detected values of the first and second angles.
摘要翻译： 场产生单元产生包括第一位置的第一部分磁场和第二位置的第二局部磁场的旋转磁场。 第一和第二部分磁场在180°方向上不同，并且沿相同的旋转方向旋转。 第一检测单元在第一位置检测第一施加磁场的方向相对于第一方向形成的第一角度。 第一施加场包括第一部分磁场作为其主要成分。 第二检测单元在第二位置检测第二施加磁场的方向相对于第二方向形成的第二角度。 第二施加场包括第二部分磁场作为其主要成分。 基于第一和第二角度的检测值来计算基准位置中的旋转磁场的方向相对于基准方向形成的角度的检测值。
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公开(公告)号：US20110025309A1
公开(公告)日：2011-02-03
申请号：US12830778
申请日：2010-07-06
申请人： Shunji SARUKI , Hiraku Hirabayashi
发明人： Shunji SARUKI , Hiraku Hirabayashi
IPC分类号： G01B7/30
CPC分类号： G01D5/145
摘要： The angle-of-rotation sensor apparatus of the invention comprises a shaft supported rotatably about an axial center, a permanent magnet fixed to one end face of the shaft, and a magnetic field sensor device located in opposition to the permanent magnet at a constant spacing. The permanent magnet used is in a cuboidal shape and magnetized in the minor axis (X) direction at the rectangular surface opposing to the magnetic field sensor device. The minor axis side is defined as the X direction and the major axis side as the Y direction. Given the opposing surface of the same area, the area where the angle distribution of the magnetic field emitted out of the permanent magnet can be placed in a uniform direction is made so wide that the tolerance range for axial alignment errors between the magnetic field sensor device and the permanent magnet can be enlarged.
摘要翻译： 本发明的旋转角度传感器装置包括可绕轴心方向可旋转地支撑的轴，固定在轴的一个端面上的永久磁铁，以及以恒定间隔与永磁体相对的磁场传感器装置 。 所使用的永磁体为立方体形状，并且在与磁场传感器装置相对的矩形表面处以短轴（X）方向磁化。 短轴侧被定义为X方向，长轴侧被定义为Y方向。 给定相同面积的相对表面，使从永磁体发射出的磁场的角度分布能够均匀地放置的区域变宽到使得磁场传感器装置之间的轴向对准误差的公差范围 永久磁铁可以扩大。
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公开(公告)号：US08589105B2
公开(公告)日：2013-11-19
申请号：US13187942
申请日：2011-07-21
摘要： An angle detection unit including first to third arithmetic units receives first and second signals that are associated with intensities of components of a rotating magnetic field in mutually different directions. The first arithmetic unit generates a sum of squares signal made up of the sum of squares of the first and second signals. Based on the sum of squares signal, the second arithmetic unit calculates a first error component estimate which is an estimated value of a first error component included in the first signal and a second error component estimate which is an estimated value of a second error component included in the second signal. The third arithmetic unit generates a first corrected signal by subtracting the first error component estimate from the first signal, generates a second corrected signal by subtracting the second error component estimate from the second signal, and calculates a detected angle value based on the first and second corrected signals.
摘要翻译： 包括第一至第三运算单元的角度检测单元接收与相互不同方向的旋转磁场的分量的强度相关联的第一和第二信号。 第一算术单元产生由第一和第二信号的平方和组成的平方和信号。 基于平方和信号，第二算术单元计算第一误差分量估计，其是包括在第一信号中的第一误差分量的估计值和作为包括的第二误差分量的估计值的第二误差分量估计 在第二个信号。 第三算术单元通过从第一信号中减去第一误差分量估计来产生第一校正信号，通过从第二信号中减去第二误差分量估计来产生第二校正信号，并且基于第一和第二运算单元计算检测角度值 校正信号。
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公开(公告)号：US20110031965A1
公开(公告)日：2011-02-10
申请号：US12816725
申请日：2010-06-16
申请人： Shunji SARUKI , Hiraku Hirabayashi
发明人： Shunji SARUKI , Hiraku Hirabayashi
IPC分类号： G01B7/30
CPC分类号： G01D3/036 , G01D5/24476
摘要： A magnetic sensor includes a first detection unit and a second detection unit. The first detection unit calculates a first detection angle which is a detected value of a first angle that a direction of an external magnetic field in a first position forms with respect to a first direction. The second detection unit calculates a second detection angle which is a detected value of a second angle that the direction of the external magnetic field in a second position forms with respect to a second direction. The first detection angle includes a first angular error. The second detection angle includes a second angular error. The first angular error and the second angular error differ in phase by an odd number of times ½ of the error period.
摘要翻译： 磁传感器包括第一检测单元和第二检测单元。 第一检测单元计算作为相对于第一方向形成第一位置的外部磁场的方向的第一角度的检测值的第一检测角度。 第二检测单元计算作为相对于第二方向形成第二位置的外部磁场的方向的第二角度的检测值的第二检测角度。 第一检测角度包括第一角度误差。 第二检测角度包括第二角度误差。 第一个角度误差和第二个角度误差的相位差异为误差周期的1/2倍。
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公开(公告)号：US20110025319A1
公开(公告)日：2011-02-03
申请号：US12841501
申请日：2010-07-22
申请人： Shunji SARUKI , Hiraku Hirabayashi
发明人： Shunji SARUKI , Hiraku Hirabayashi
IPC分类号： G01R33/02
CPC分类号： G01R33/0029 , G01R33/091
摘要： A magnetic sensor includes a bridge circuit with a first, a second, a third, and a fourth resistor annularly and electrically connected together in this order, and a compensation resistor. The compensation resistor is connected to a first point between the fourth resistor and the first resistor. The first to fourth resistors include a first to fourth tunnel magneto-resistance element, respectively. Each of the magnetization directions in the magnetization fixed layers in the second and fourth magneto resistance elements is opposite to the magnetization direction in the magnetization fixed layer in the first magneto resistance element. The magnetization direction in the magnetization fixed layer in the third magneto resistance element is the same as the magnetization direction in the magnetization fixed layer in the first magneto resistance element. The resistance of the compensation resistor varies with a period of 180 degrees with respect to a rotation angle of the external field.
摘要翻译： 磁传感器包括具有依次环形并电连接在一起的第一，第二，第三和第四电阻器的桥式电路和补偿电阻器。 补偿电阻器连接到第四电阻器和第一电阻器之间的第一点。 第一至第四电阻器分别包括第一至第四隧道磁阻元件。 第二和第四磁阻元件中的磁化固定层中的每个磁化方向与第一磁阻元件中的磁化固定层中的磁化方向相反。 第三磁阻元件的磁化固定层的磁化方向与第一磁阻元件的磁化固定层的磁化方向相同。 补偿电阻的电阻相对于外部场的旋转角度为180度的周期而变化。
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公开(公告)号：US08749229B2
公开(公告)日：2014-06-10
申请号：US13301076
申请日：2011-11-21
IPC分类号： G01B7/30
CPC分类号： G01R33/091 , G01D5/145 , G01R33/0011
摘要： A rotation angle sensor includes a magnet that rotates about a rotation axis. The magnet has an end face perpendicular to the rotation axis and has a magnetization in a direction perpendicular to the rotation axis. The rotation angle sensor further includes a magnetic sensor that faces the end face of the magnet and detects a magnetic field produced by the magnet. The magnet includes a plate-shaped portion including the end face, and a ring-shaped portion that is located on a side of the plate-shaped portion farther from the end face and coupled to the plate-shaped portion. The plate-shaped portion does not include any hollow through which the rotation axis passes, whereas the ring-shaped portion includes a hollow through which the rotation axis passes.
摘要翻译： 旋转角度传感器包括绕旋转轴线旋转的磁体。 磁体具有垂直于旋转轴线的端面，并且在垂直于旋转轴线的方向上具有磁化强度。 旋转角度传感器还包括面向磁体的端面的磁传感器，并且检测由磁体产生的磁场。 该磁体包括一个包括该端面的板状部分和一个环形部分，该环形部分位于距离该端面更远离该板状部分的一侧，并联接到该板状部分。 板状部分不包括旋转轴通过的任何中空部分，而环形部分包括旋转轴线通过的中空部分。
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公开(公告)号：US08487611B2
公开(公告)日：2013-07-16
申请号：US12841501
申请日：2010-07-22
申请人： Shunji Saruki , Hiraku Hirabayashi
发明人： Shunji Saruki , Hiraku Hirabayashi
IPC分类号： G01R33/02
CPC分类号： G01R33/0029 , G01R33/091
摘要： A magnetic sensor includes a bridge circuit with a first, a second, a third, and a fourth resistor annularly and electrically connected together in this order, and a compensation resistor. The compensation resistor is connected to a first point between the fourth resistor and the first resistor. The first to fourth resistors include a first to fourth tunnel magneto-resistance element, respectively. Each of the magnetization directions in the magnetization fixed layers in the second and fourth magneto resistance elements is opposite to the magnetization direction in the magnetization fixed layer in the first magneto resistance element. The magnetization direction in the magnetization fixed layer in the third magneto resistance element is the same as the magnetization direction in the magnetization fixed layer in the first magneto resistance element. The resistance of the compensation resistor varies with a period of 180 degrees with respect to a rotation angle of the external field.
摘要翻译： 磁传感器包括具有依次环形并电连接在一起的第一，第二，第三和第四电阻器的桥式电路和补偿电阻器。 补偿电阻器连接到第四电阻器和第一电阻器之间的第一点。 第一至第四电阻器分别包括第一至第四隧道磁阻元件。 第二和第四磁阻元件中的磁化固定层中的每个磁化方向与第一磁阻元件中的磁化固定层中的磁化方向相反。 第三磁阻元件的磁化固定层的磁化方向与第一磁阻元件的磁化固定层的磁化方向相同。 补偿电阻的电阻相对于外部场的旋转角度为180度的周期而变化。
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