公开(公告)号：US06211669B1

公开(公告)日：2001-04-03

申请号：US09175414

申请日：1998-10-20

申请人： Masahiro Yokotani ,  Izuru Shinjo ,  Yasuyoshi Hatazawa ,  Naoki Hiraoka

发明人： Masahiro Yokotani ,  Izuru Shinjo ,  Yasuyoshi Hatazawa ,  Naoki Hiraoka

IPC分类号： G01R3309

CPC分类号： G01D5/147 ,  B82Y25/00 ,  G01R33/093

摘要： Disclosed is a magnetic detector in which a GMR device is operated within the limited range of a magnetic field so as to optimize changes in resistance value of the GMR device and to improve noise resistance. The magnetic detector comprises a magnet (4) for generating a magnetic field, a rotary member (2) of magnetic material arranged with a predetermined gap left relative to the magnet and provided with projections capable of changing the magnetic field generated by the magnet, and a giant magnetoresistance device (3) of which resistance value is changed depending on the magnetic field changed by the rotary member of magnetic material. The giant magnetoresistance device is arranged in such a position with a predetermined gap relative to the magnetic field generating means that the giant magnetoresistance device is subject to a bias magnetic field applied with the intensity of magnetic field in a predetermined range, e.g., 100±150 [Oe], where the giant magnetoresistance device exhibits a high resistance change rate.

摘要翻译： 公开了一种磁检测器，其中GMR器件在磁场的有限范围内操作，以便优化GMR器件的电阻值的变化并改善抗噪声性。 磁检测器包括用于产生磁场的磁体（4），磁性材料的旋转部件（2），相对于磁体布置有预定的间隙，并且具有能够改变由磁体产生的磁场的突起，以及 电阻值根据由磁性材料的旋转构件变化的磁场而变化的巨磁阻装置（3）。 巨磁电阻装置相对于磁场发生装置以预定的间隔布置在这样的位置，巨磁电阻装置经受施加有预定范围的磁场强度的偏置磁场，例如100±150 [Oe]，其中巨磁电阻器件表现出高电阻变化率。

公开(公告)号：US06194893B1

公开(公告)日：2001-02-27

申请号：US09162887

申请日：1998-09-30

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

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

IPC分类号： G01B714

CPC分类号： G01R33/09

摘要： A magnetic detector is disclosed with a power-on function which can essentially eliminate temperature characteristics of a magnetic field sensing device and improve edge detecting accuracy of alternately projected and recessed portions of a moving 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 remaining relative to the magnet and having alternately projected and recessed portions to change the magnetic field generated by the magnet, a magnetoresistive device comprising a plurality of magnetic field sensing elements and detecting changes in the magnetic field by movement of the rotary member of magnetic material, and a magnetic guide for adjusting changes in the magnetic field caused by the alternately projected and recessed portions of the rotary member of magnetic material.

摘要翻译： 公开了具有开机功能的磁性检测器，其基本上可以消除磁场感测装置的温度特性，并提高磁性材料的移动部件的交替投影和凹陷部分的边缘检测精度。 磁检测器包括用于产生磁场的磁体，磁性材料的旋转构件，其相对于磁体保留预定间隙，并且具有交替地投影和凹陷部分以改变由磁体产生的磁场;磁阻装置，包括： 多个磁场感测元件，并且通过磁性材料的旋转构件的移动来检测磁场的变化，以及用于调整由磁性材料的旋转构件的交替突出和凹陷部分引起的磁场变化的磁性引导件。

公开(公告)号：US6111403A

公开(公告)日：2000-08-29

申请号：US161675

申请日：1998-09-29

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

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

IPC分类号： G01B7/00 ,  G01B7/30 ,  G01D5/245 ,  G01R33/09 ,  G01B7/14

CPC分类号： B82Y25/00 ,  G01R33/093

摘要： A magnetic detector is disclosed with a power-on function which can essentially eliminate temperature characteristics of a magnetic field sensing device and improve edge detecting accuracy of alternately projected and recessed portions of a moving 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 remaining relative to the magnet and having alternately projected and recessed portions to change the magnetic field generated by the magnet, and a magnetoresistive device comprising a plurality of magnetic field sensing elements and detecting changes in the magnetic field by movement of the rotary member of magnetic material. The magnetic flux crosses the plurality of magnetic field sensing elements at a first predetermined angle when the recessed portion of the moving member of magnetic material is opposed to the magnetic field sensing device, and the magnetic flux crosses the plurality of magnetic field sensing elements at a second predetermined angle when the projected portion of the moving member of magnetic material is opposed to the magnetic field sensing device. The first and second predetermined angles are symmetrical with respect to a direction vertical to a plane in which the plurality of magnetic field sensing elements are arranged.

摘要翻译： 公开了具有开机功能的磁性检测器，其基本上可以消除磁场感测装置的温度特性，并提高磁性材料的移动部件的交替投影和凹陷部分的边缘检测精度。 磁检测器包括用于产生磁场的磁体，磁性材料的旋转构件，以相对于磁体残留预定间隙的方式设置，并且具有交替地投影和凹陷部分以改变由磁体产生的磁场;以及磁阻装置，包括 多个磁场感测元件，并且通过磁性材料的旋转构件的移动来检测磁场的变化。 当磁性材料的移动构件的凹部与磁场感测装置相对时，磁通量以第一预定角度与多个磁场感测元件交叉，并且磁通量以一定的角度与多个磁场感测元件交叉 当磁性材料的移动部件的突出部分与磁场感测装置相对时，是第二预定角度。 第一和第二预定角度相对于垂直于布置有多个磁场感测元件的平面的方向对称。

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：US06246234B1

公开(公告)日：2001-06-12

申请号：US09175413

申请日：1998-10-20

申请人： Masahiro Yokotani ,  Izuru Shinjo ,  Yasuyoshi Hatazawa

发明人： Masahiro Yokotani ,  Izuru Shinjo ,  Yasuyoshi Hatazawa

IPC分类号： G01B730

CPC分类号： B82Y25/00 ,  G01R33/093

摘要： Disclosed is a magnetic detector in which a GMR device is operated within the limited range of a magnetic field so as to optimize a temperature characteristic of changes in resistance value and to improve noise resistance. The magnetic detector comprises a magnet (4) for generating a magnetic field, a rotary member (2) of magnetic material arranged with a predetermined gap left relative to the magnet and provided with projections capable of changing the magnetic field generated by the magnet, and a giant magnetoresistance device (3) of which resistance value is changed depending on the magnetic field changed by the rotary member of magnetic material. The giant magnetoresistance device is arranged to have such a predetermined gap relative to the magnet that the giant magnetoresistance device operates under a magnetic field applied to change in a predetermined amplitude range, e.g., 50˜150 [Oe], where a temperature characteristic of resistance change rate of the giant magnetoresistance device is small.

摘要翻译： 公开了一种磁检测器，其中GMR器件在磁场的有限范围内操作，以便优化电阻值变化的温度特性并改善抗噪声性。 磁检测器包括用于产生磁场的磁体（4），磁性材料的旋转部件（2），相对于磁体布置有预定的间隙，并且具有能够改变由磁体产生的磁场的突起，以及 电阻值根据由磁性材料的旋转构件变化的磁场而变化的巨磁阻装置（3）。 巨磁电阻装置被布置成具有相对于巨磁电阻装置在施加以在预定幅度范围（例如50〜150 [Oe]）改变的磁场下操作的磁体的这样的预定间隙，其中电阻的温度特性 巨磁阻器件的变化率很小。

公开(公告)号：US06204662B1

公开(公告)日：2001-03-20

申请号：US09176427

申请日：1998-10-21

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： G01R3309

CPC分类号： B82Y25/00 ,  G01P3/487 ,  G01R33/093

摘要： A magnetic field sensing element comprising a giant magnetic resistance element formed on a substrate for detecting a change in a magnetic field, an integrated circuit formed on the substrate for carrying out predetermined arithmetic processing based on a change in the magnetic field, and an input side protective resistor and an output side protective resistor provided on the input side and the output side, respectively, of the integrated circuit, wherein the metal film from which the input side resistor and the output side resistor are formed is identical to the metal film from which the integrated circuit is formed.

摘要翻译： 一种磁场感测元件，包括形成在用于检测磁场变化的基板上的巨磁阻元件，形成在基板上的集成电路，用于基于磁场的变化执行预定的运算处理，以及输入侧 保护电阻和输出侧保护电阻分别设置在集成电路的输入侧和输出侧，其中形成输入侧电阻和输出侧电阻的金属膜与金属膜相同，金属膜与 形成集成电路。

公开(公告)号：US07045997B2

公开(公告)日：2006-05-16

申请号：US10705959

申请日：2003-11-13

申请人： Masahiro Yokotani ,  Izuru Shinjo ,  Naohiro Mishiro ,  Naoki Hiraoka

发明人： Masahiro Yokotani ,  Izuru Shinjo ,  Naohiro Mishiro ,  Naoki Hiraoka

IPC分类号： G01B7/30

CPC分类号： G01D5/147 ,  G01D5/24438 ,  G01R33/09

摘要： A magnetic detection apparatus can accurately detect the rotational position of a magnetic moving member even when intervals between adjacent teeth formed thereon and the circumferential width of each tooth itself are both small and when an opposing distance between the magnetic moving member and first and second magnetoresistive segments is large. A processing circuit is arranged apart from the magnetic moving member on a plane thereof, which is formed on its periphery with the teeth. The processing circuit has a bridge circuit including the first magnetoresistive segment and the second magnetoresistive segment. A magnet applies a magnetic field to the first and second magnetoresistive segments, and to the magnetic moving member in a direction of an axis of rotation thereof. The second magnetoelectric conversion element is arranged substantially on a center line passing through the center of the magnet on a line in opposition to the magnetic moving member when viewed along the direction of the axis of rotation of the magnetic moving member, so that a differential output can be obtained from the outputs of the first magnetoelectric conversion element and the second magnetoelectric conversion element.

摘要翻译： 磁性检测装置即使在形成在其上的相邻齿之间的间隔和每个齿本身的周向宽度都小的情况下也可以精确地检测磁性移动构件的旋转位置，并且当磁性移动构件与第一和第二磁阻段之间的相对距离 很大 处理电路与磁性移动构件在其周边上与齿形成的平面上分开配置。 处理电路具有包括第一磁阻部分和第二磁阻部分的桥接电路。 磁体将磁场施加到第一和第二磁阻部分，并且在其旋转轴线的方向上对磁性移动部件施加磁场。 第二磁电转换元件在沿着磁性移动构件的旋转轴线的方向观察时，基本上布置在与磁性移动构件相对的线上通过磁体中心的中心线上，使得差分输出 可以从第一磁电转换元件和第二磁电转换元件的输出获得。

公开(公告)号：US06870365B1

公开(公告)日：2005-03-22

申请号：US10820753

申请日：2004-04-09

申请人： Masahiro Yokotani ,  Izuru Shinjo ,  Naoki Hiraoka

发明人： Masahiro Yokotani ,  Izuru Shinjo ,  Naoki Hiraoka

IPC分类号： G01P13/04 ,  G01B7/30 ,  G01D5/12 ,  G01D5/14 ,  G01D5/16 ,  G01D5/22

CPC分类号： G01D5/145

摘要： Six magneto-resistance segments are formed by film-forming on a signal processing circuit part consisting of an IC chip and are disposed in a predetermined rotation direction of a magnetic moving body, symmetrically about the centerline of a magnet perpendicular to that rotation direction. Two pairs of magneto-resistance segments, whose pitch centers are positioned symmetrically with respect to the centerline of the magnet, form first and second bridge circuits, and the remaining pair of magneto-resistance segments, which has its pitch center on the centerline of the magnet, forms a third bridge circuit.

摘要翻译： 在由IC芯片组成的信号处理电路部分上形成六个磁阻部分，并且以垂直于该旋转方向的磁体的中心线对称地设置在磁性移动体的预定旋转方向上。 两对磁阻部分，其间距中心相对于磁体的中心线对称地形成第一和第二桥接电路，剩下的一对磁阻部分在其中心线处具有中心线 磁铁，形成第三桥电路。

公开(公告)号：US6107793A

公开(公告)日：2000-08-22

申请号：US890670

申请日：1997-07-09

申请人： Masahiro Yokotani ,  Yasuyoshi Hatazawa

发明人： Masahiro Yokotani ,  Yasuyoshi Hatazawa

IPC分类号： G01P3/488 ,  F02B53/06 ,  F02D35/00 ,  F02D45/00 ,  G01D5/14 ,  G01D5/16 ,  G01D5/245 ,  G01R33/06 ,  G01R33/09 ,  G01B7/14 ,  G01B7/30

CPC分类号： G01D5/147 ,  G01R33/09

摘要： A sensing device outputs a square wave signal whose edges exactly correspond to edges of protruding or recessed portions of a rotary magnetic-material member, regardless of the positioning accuracy of a magnetic field detecting element with respect to the location of a magnet. 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 magnetic material member being disposed a predetermined distance apart from the magnet; and a magnetic field detecting element whose resistance changes in response to the change in the magnetic field induced by the magnetic field variation inducing means; wherein the surface of the magnet facing the magnetic field detecting element is slanted.

摘要翻译： 感测装置输出方波信号，其边缘精确对应于旋转磁性材料构件的突出或凹入部分的边缘，而不管磁场检测元件相对于磁体位置的定位精度如何。 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旋转磁性材料构件，旋转磁性材料构件与磁体隔开预定距离; 以及磁场检测元件，其电阻响应于由磁场变化感应装置引起的磁场的变化而变化; 其中面向磁场检测元件的磁体的表面是倾斜的。