公开(公告)号：US06528992B2

公开(公告)日：2003-03-04

申请号：US09168669

申请日：1998-10-09

申请人： Izuru Shinjo ,  Yasuyoshi Hatazawa ,  Takuji Nada ,  Masahiro Yokotani

发明人： Izuru Shinjo ,  Yasuyoshi Hatazawa ,  Takuji Nada ,  Masahiro Yokotani

IPC分类号： G01B730

CPC分类号： G01R33/09

摘要： A magnetic detector for detecting a rotational angle of a gear-like rotary member of magnet material generates twice as many pulses as the number of projected or recessed portions of the rotary member of magnetic material. The magnetic detector comprises a magnet for generating a magnetic field, a rotary member of magnetic material disposed with a predetermined gap retaining relative to the magnet, and an magnetic field sensing device for detecting changes in the magnetic field by movement of the moving member of magnetic material. The magnetic field sensing device is disposed relative to the magnet so that a center axis of the magnetic field sensing device is aligned with a center axis of the magnet wherein a magnetic field acting on the magnetic field sensing device changes from positive to negative and from negative to positive with the movement of the moving member of magnetic material.

摘要翻译： 用于检测磁体材料的齿轮状旋转构件的旋转角度的磁检测器产生与磁性材料的旋转构件的突出或凹入部分的数量相同的脉冲数量的两倍。 磁检测器包括用于产生磁场的磁体，以相对于磁体保持预定间隙的方式设置的磁性材料的旋转部件，以及用于通过磁性移动部件的移动来检测磁场变化的磁场检测装置 材料。 磁场感测装置相对于磁体设置，使得磁场感测装置的中心轴线与磁体的中心轴线对齐，其中作用在磁场感测装置上的磁场从正向负变为负 随着磁性材料的移动构件的移动而呈正。

公开(公告)号：US06177793B1

公开(公告)日：2001-01-23

申请号：US09163980

申请日：1998-09-30

申请人： Izuru Shinjo ,  Yasuyoshi Hatazawa ,  Takuji Nada ,  Masahiro Yokotani

发明人： Izuru Shinjo ,  Yasuyoshi Hatazawa ,  Takuji Nada ,  Masahiro Yokotani

IPC分类号： G01B730

CPC分类号： G01R33/09

摘要： A magnetic detector D is disclosed which can perform precise detection even when a moving member of magnetic material is rotating at a very low speed, and can output a signal corresponding to recessed and projected portions of the moving member of magnetic material when the power is turned on and when the rotary member of magnetic material is stopped. The magnetic detector includes a rotary member of magnetic material, a detecting unit for detecting a displacement of the rotary member of magnetic material, an AC coupling circuit for removing a DC component from an output signal of the detecting unit, a comparison circuit for converting an output signal of the AC coupling circuit into a binary signal, an output circuit for outputting an output signal of the comparison circuit, and a variable resistor for setting a comparison level for the comparison circuit to a level between two different signal levels.

摘要翻译： 磁性检测器D被公开，即使当磁性材料的移动部件以非常低的速度旋转时也能进行精确的检测，并且当电力转动时，可以输出对应于磁性材料的移动部件的凹入和突出部分的信号 当磁性材料的旋转构件停止时。 磁检测器包括磁性材料的旋转部件，用于检测磁性材料的旋转部件的位移的检测单元，用于从检测单元的输出信号中去除直流分量的AC耦合电路，用于转换 AC耦合电路的输出信号转换为二进制信号，输出电路，输出比较电路的输出信号，以及可变电阻，用于将比较电路的比较电平设定为两个不同信号电平之间的电平。

公开(公告)号：US06169396A

公开(公告)日：2001-01-02

申请号：US08896166

申请日：1997-07-17

申请人： Masahiro Yokotani ,  Izuru Shinjo

发明人： Masahiro Yokotani ,  Izuru Shinjo

IPC分类号： G01B730

CPC分类号： G01D5/147 ,  G01R33/09

摘要： A sensing device capable of obtaining an output signal corresponding precisely to a predetermined position (angle), for example, of a protruding or recessed portion of a moving magnetic-material member without being affected by temperature change. The sensing device includes: a magnet for generating a magnetic field; a rotary magnetic material member for changing the magnetic field generated by the magnet, the rotary member being disposed at a predetermined distance apart from the magnet; and a giant magnetoresistance element for detecting the change in the magnetic field induced by the rotary magnetic material member and generating a plurality of outputs having a peak value different from each other, the operating range of the giant magnetoresistance element being set such that a uniform change in resistance occurs over the operating range regardless of the direction of change in the magnetic field induced by the rotary magnetic material member, wherein the center of the giant magnetoresistance element is shifted from the center of the magnet in a direction parallel to a plane including the direction of the change in magnetic field induced by the rotary magnetic material member.

摘要翻译： 一种感测装置，能够在不受温度变化的影响的情况下获得与移动的磁性材料构件的突出或凹入部分的预定位置（角度）精确对应的输出信号。 感测装置包括：用于产生磁场的磁体; 用于改变由所述磁体产生的磁场的旋转磁性材料构件，所述旋转构件设置在与所述磁体隔开预定距离处; 以及用于检测由旋转磁性材料构件引起的磁场变化并产生具有彼此不同的峰值的多个输出的巨磁电阻元件，将巨磁电阻元件的工作范围设定为使得均匀变化 电阻发生在操作范围内，而与旋转磁性材料构件所引起的磁场的变化方向无关，其中巨磁电阻元件的中心在平行于包括该磁性材料的平面的磁体的中心偏移 由旋转磁性材料构件引起的磁场变化的方向。

公开(公告)号：US5801529A

公开(公告)日：1998-09-01

申请号：US740623

申请日：1996-10-31

申请人： Hideki Umemoto ,  Naoki Hiraoka ,  Wataru Fukui ,  Yutaka Ohashi ,  Masahiro Yokotani

发明人： Hideki Umemoto ,  Naoki Hiraoka ,  Wataru Fukui ,  Yutaka Ohashi ,  Masahiro Yokotani

IPC分类号： G01B7/30 ,  F02D35/00 ,  G01B7/00 ,  G01D5/14 ,  G01D5/16 ,  G01D5/18 ,  G01D5/245 ,  G01R33/09 ,  G01B7/14 ,  G01R33/06 ,  F62B53/06

CPC分类号： G01D5/147

摘要： The invention provides a sensing device capable of outputting a correct signal precisely corresponding to a particular position (angle) of, for example a protruding or recessed portion of a rotating member made of a magnetic material. The sensing device includes: a magnet for generating magnetic field; a rotary member of magnetic material for changing a magnetic field generated by the magnet, the rotary member of magnetic material being disposed a predetermined distance apart from the magnet; and a giant magnetoresistance device for detecting the varying magnetic field, the operating range of the giant magnetoresistance device being set such that the change in resistance of the giant magnetoresistance device is uniform over the entire operating range in both directions of change in the magnetic field induced by the rotary member of magnetic material, wherein the giant magnetoresistance device is disposed in such a manner that the center of the magnetic field sensing plane of the giant magnetoresistance device deviates from the center of the magnet in a direction parallel to a plane containing the displacement direction of the rotary member of magnetic material.

摘要翻译： 本发明提供一种感测装置，其能够输出精确对应于由磁性材料制成的旋转构件的突出或凹陷部分的特定位置（角度）的正确信号。 感测装置包括：用于产生磁场的磁体; 用于改变由所述磁体产生的磁场的磁性材料的转动件，所述磁性材料的所述转动件与所述磁体隔开预定距离; 以及用于检测变化的磁场的巨磁电阻装置，巨磁电阻装置的工作范围被设定为使得巨磁电阻装置的电阻变化在整个工作范围内在磁场变化的两个方向上是均匀的 通过磁性材料的旋转构件，其中巨磁电阻装置以这样的方式设置，使得巨磁电阻装置的磁场感测平面的中心在与包含位移的平面平行的方向上偏离磁体的中心 磁性材料的旋转构件的方向。

公开(公告)号：US08497674B2

公开(公告)日：2013-07-30

申请号：US12907599

申请日：2010-10-19

申请人： Yoshinori Tatenuma ,  Hideki Shimauchi ,  Masahiro Yokotani ,  Yuji Kawano ,  Hiroshi Kobayashi ,  Kazuyasu Nishikawa ,  Manabu Tsukamoto

发明人： Yoshinori Tatenuma ,  Hideki Shimauchi ,  Masahiro Yokotani ,  Yuji Kawano ,  Hiroshi Kobayashi ,  Kazuyasu Nishikawa ,  Manabu Tsukamoto

IPC分类号： G01R33/02 ,  G01B7/30

CPC分类号： G01D5/2448 ,  G01P3/42 ,  G01P3/481 ,  G01P3/488

摘要： A magnetic detection apparatus includes a first comparison circuit that waveform-shapes the amplitude of a detection signal from magneto-electric transducers by DC coupling, a third comparison circuit that waveform-shapes the detection signal by AC coupling, an oscillation circuit having a natural frequency, a control circuit that counts the output of the first comparison circuit by using the oscillation means, and a selection circuit that selects the output of the first comparison means and the output of the second comparison means. The control circuit counts rising from the next rising or falling from the next falling of an output rectangular wave of the first comparison circuit, and provides output to the selection circuit at the time point at which the count value reaches a desired value. The selection circuit selects and outputs the output rectangular wave of the first comparison circuit or the third comparison circuit.

摘要翻译： 磁检测装置包括：第一比较电路，其通过DC耦合对来自磁电换能器的检测信号的振幅进行波形整形;第三比较电路，其通过AC耦合对检测信号进行波形整形;具有固有频率的振荡电路 控制电路，其通过使用振荡装置对第一比较电路的输出进行计数，以及选择电路，其选择第一比较装置的输出和第二比较装置的输出。 控制电路从第一比较电路的输出矩形波的下一个下降沿开始下一个上升或下降，并且在计数值达到期望值的时间点向选择电路提供输出。 选择电路选择并输出第一比较电路或第三比较电路的输出矩形波。

公开(公告)号：US07705584B2

公开(公告)日：2010-04-27

申请号：US11484766

申请日：2006-07-12

申请人： Masahiro Yokotani ,  Naoki Hiraoka

发明人： Masahiro Yokotani ,  Naoki Hiraoka

IPC分类号： G01P3/44 ,  G01B7/30 ,  H01L43/08

CPC分类号： G01P13/045 ,  G01P3/488

摘要： The magnetic sensor in the invention is arranged to detect a change of magnetic field caused by a movement of the magnetic movable by a magnetic sensor element arranged with a gap to the magnetic movable, to convert the detected change of magnetic field by first and second bridge circuits into electric signals, to generate first and second rectangular-wave signals by first and second comparator circuits depending upon the electric signals, and to form a signal having at least four levels by a signal forming circuit, thereby detecting a moving direction of the magnetic movable depending upon a level-change order in the signal. This makes it possible to detect a rotating direction of the magnetic movable rapidly and correctly.

摘要翻译： 本发明的磁传感器被设置为检测由磁性传感器元件移动的可移动的磁性元件所引起的磁场的变化，所述磁性传感器元件具有间隙的磁性可移动，以便通过第一和第二桥接器来检测检测到的磁场变化 电路转换为电信号，根据电信号由第一和第二比较器电路产生第一和第二矩形波信号，并且通过信号形成电路形成具有至少四个电平的信号，从而检测磁性的移动方向 根据信号中的电平变化顺序可移动。 这使得可以快速且正确地检测磁性移动的旋转方向。

公开(公告)号：US07557567B2

公开(公告)日：2009-07-07

申请号：US11946438

申请日：2007-11-28

申请人： Hiroshi Sakanoue ,  Masahiro Yokotani ,  Yuji Kawano ,  Yasuyoshi Hori

发明人： Hiroshi Sakanoue ,  Masahiro Yokotani ,  Yuji Kawano ,  Yasuyoshi Hori

IPC分类号： G01R33/06

CPC分类号： G01P3/488 ,  G01D5/2451 ,  G01P13/04

摘要： A magnetic detection device is provided in which a first signal is outputted in accordance with the mutual phase relationship between the output of a first magnetoelectric conversion output circuit and the output of a second magnetoelectric conversion output circuit that are based on the movement, in forward direction, of a detection subject, thereby generating a pulse of a high level 1 and a low level 1; a second signal is outputted in accordance with the mutual phase relationship between the output of the first magnetoelectric conversion output circuit and the output of the second magnetoelectric conversion output circuit that are based on the movement, in forward direction, of the detection subject; an output signal processing circuit for generating a pulse of a high level 2 and a low level 2 is provided; and not only the pulse of the high level 1 and the low level 1 does not cross the other comparison level, but also the pulse of the high level 2 and the low level 2 does not cross the one comparison level.

摘要翻译： 提供了一种磁检测装置，其中根据第一磁电转换输出电路的输出和基于该运动的第二磁电转换输出电路的输出之间的相互关系输出第一信号， ，从而产生高电平1和低电平1的脉冲; 根据第一磁电转换输出电路的输出与第二磁电转换输出电路的输出之间的相互关系输出第二信号，该相位关系基于检测对象的正向运动; 提供用于产生高电平2和低电平2的脉冲的输出信号处理电路; 不仅高电平1和低电平1的脉冲不会越过其他比较电平，而且高电平2和低电平2的脉冲也不会越过一个比较电平。

公开(公告)号：US20070170913A1

公开(公告)日：2007-07-26

申请号：US11414482

申请日：2006-05-01

申请人： Masahiro Yokotani ,  Naoki Hiraoka

发明人： Masahiro Yokotani ,  Naoki Hiraoka

IPC分类号： G01B7/14

CPC分类号： G01D5/147

摘要： A magnetic detection apparatus can reduce the cost of production to a substantially extent. The magnetic detection apparatus includes a magnetic movable element (1) having a first groove (1a) and a second groove (1b) that are different in diametral depth from each other, a magnetoresistive segment (3a) that is arranged apart from the magnetic movable element (1) so as to come in opposition to the first and second grooves (1a, 1b) in accordance with the moving magnetic movable element (1), a magnet (5) that is arranged in the vicinity of the magnetoresistive segment (3a) for applying a magnetic field thereto, and a processing circuit part (4) that generates different output signals in accordance with a change of the magnetic field applied to the magnetoelectric conversion element (3a) which is caused in accordance with the first and second grooves (1a, 1b) in opposition to said processing circuit part (4).

摘要翻译： 磁检测装置可以大幅度地降低生产成本。 磁检测装置包括具有彼此不同直径深度的第一凹槽（1a）和第二凹槽（1b）的磁性可移动元件（1），分隔开的磁阻部分（3a） 所述磁性可动元件（1）根据所述移动磁性可动元件（1）与所述第一和第二凹槽（1a，1b）相对;磁体（5），其布置在 用于向其施加磁场的磁阻部分（3a），以及根据施加到磁电转换元件（3a）上的磁场的变化产生不同输出信号的处理电路部分（4） 根据与所述处理电路部分（4）相对的第一和第二凹槽（1a，1b）。

公开(公告)号：US5877626A

公开(公告)日：1999-03-02

申请号：US739048

申请日：1996-10-28

申请人： Hideki Umemoto ,  Naoki Hiraoka ,  Wataru Fukui ,  Yutaka Ohashi ,  Masahiro Yokotani

发明人： Hideki Umemoto ,  Naoki Hiraoka ,  Wataru Fukui ,  Yutaka Ohashi ,  Masahiro Yokotani

IPC分类号： G01D5/18 ,  G01D5/14 ,  G01D5/16 ,  G01D5/245 ,  G01R33/09 ,  G01V3/08 ,  G01B7/14 ,  F02B53/06 ,  G01B7/30 ,  G01R33/06

CPC分类号： G01D5/147 ,  G01V3/08

摘要： The invention provides a sensing device capable of outputting a correct signal precisely corresponding to a particular position (angle) such as a protruding or recessed portion of a rotating member made of a magnetic material over the entire operating temperature range regardless of the temperature coefficient of the magnetic field sensing element. The sensing device includes: a magnet for generating a magnetic field; a rotary member of magnetic material for changing the magnetic field generated by the magnet, the rotary member being disposed at a predetermined distance apart from the magnet; a giant magnetoresistance device which changes in resistance in response to the magnetic field whose magnitude is changed by the rotary member of magnetic material; and an AC coupling circuit for performing an AC coupling process on the output of signal of the giant magnetoresistance device.

摘要翻译： 本发明提供一种感测装置，其能够在整个工作温度范围内输出精确对应于由磁性材料制成的旋转部件的突出或凹入部分的特定位置（角度）的正确信号，而与 磁场感应元件。 感测装置包括：用于产生磁场的磁体; 用于改变由磁体产生的磁场的磁性材料的旋转构件，旋转构件设置在与磁体隔开预定距离处; 一种巨磁阻装置，其响应于由磁性材料的旋转构件改变其大小的磁场而改变电阻; 以及用于对巨磁电阻装置的信号的输出进行AC耦合处理的AC耦合电路。

公开(公告)号：US20070285086A1

公开(公告)日：2007-12-13

申请号：US11645520

申请日：2006-12-27

申请人： Masahiro Yokotani ,  Naoki Hiraoka

发明人： Masahiro Yokotani ,  Naoki Hiraoka

IPC分类号： G01B7/30

CPC分类号： G01D5/24438

摘要： A magnetic detector, wherein the magnetic/electric conversion element is constituted by at least six segments symmetrically arranged in a direction in which the magnetic moving body rotates maintaining a predetermined pitch with respect to the center line of the magnet, first and second bridge circuits are constituted so as to produce outputs accompanying the rotation of the magnetic moving body, and a third bridge circuit is constituted so as to produce an output accompanying the rotation of the magnetic moving body, and wherein a comparison level of a comparator circuit that shapes the waveform of a differential output signal of the first and second bridge circuits is adjusted relying upon an output signal of the third bridge circuit.

摘要翻译： 一种磁检测器，其中磁/电转换元件由至少六个片段构成，所述至少六个片段沿磁性移动体旋转的方向对称地保持相对于磁体的中心线的预定间距，第一和第二桥接电路是 构成为产生伴随着磁性体的旋转的输出，第三桥接电路被构成为产生伴随着磁性体的旋转的输出，并且，比较电路的比较电平， 根据第三桥接电路的输出信号调整第一和第二桥接电路的差分输出信号。