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公开(公告)号：US06211669B1
公开(公告)日：2001-04-03
申请号：US09175414
申请日：1998-10-20
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。
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公开(公告)号：US07045997B2
公开(公告)日：2006-05-16
申请号：US10705959
申请日：2003-11-13
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。
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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
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。
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公开(公告)号：US06937010B1
公开(公告)日：2005-08-30
申请号：US10978466
申请日：2004-11-02
申请人： Akira Takashima , Masahiro Yokotani , Izuru Shinjo
发明人： Akira Takashima , Masahiro Yokotani , Izuru Shinjo
CPC分类号： G01D5/147 , G01D11/245
摘要： A magnetic detector capable of being easily assembled and diminishing fluctuation in magnetic detection accuracy includes: magnetic resistance elements whose resistance value changes according to change in magnetic field generated by rotation of a multi-polarized rotor; an IC formed by integrating a signal processing circuit section that outputs a signal corresponding to multi-polarization of the rotor based on change in resistance values of the magnetic resistance elements; a lead frame mounted with the IC and connected to an external output terminal for externally outputting an output signal from the signal processing circuit section; a magnet applying a bias magnetic field to the magnetic resistance elements; and a magnetic guide for correcting lines of magnetic force from the magnet. The IC, lead frame and magnetic guide are preliminarily assembled to serve as a first assembly, and the magnet and external output terminal are preliminarily assembled to serve as a second assembly.
摘要翻译： 能够容易地组装和减少磁检测精度波动的磁检测器包括：电阻值随着多极转子旋转产生的磁场变化而变化的磁阻元件; 通过对基于所述磁阻元件的电阻值的变化而输出与所述转子的多极化相对应的信号的信号处理电路部进行积分而形成的IC; 安装有IC并连接到外部输出端子的引线框架，用于从信号处理电路部分外部输出输出信号; 向所述磁阻元件施加偏置磁场的磁体; 以及用于校正来自磁体的磁力线的磁性引导件。 预先组装IC，引线框架和磁性引导件作为第一组件，并且预先组装磁体和外部输出端子用作第二组件。
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公开(公告)号：US20050015968A1
公开(公告)日：2005-01-27
申请号：US10704672
申请日：2003-11-12
申请人： Izuru Shinjo , Shigeki Tsujii , Yoshinori Tatenuma , Hiroshi Sakanoue , Masahiro Yokotani , Ryouichi Sasahara
发明人： Izuru Shinjo , Shigeki Tsujii , Yoshinori Tatenuma , Hiroshi Sakanoue , Masahiro Yokotani , Ryouichi Sasahara
IPC分类号： G01D5/245 , G01D5/14 , G01D5/16 , G01D5/20 , G01D11/24 , G01R1/00 , G01R33/02 , G01R33/09 , H01F7/06
CPC分类号： G01D5/147 , G01D11/245 , Y10T29/49004 , Y10T29/49007 , Y10T29/4902 , Y10T29/49075 , Y10T29/49082 , Y10T29/49121 , Y10T29/49128 , Y10T29/49169 , Y10T29/5313 , Y10T29/53165 , Y10T29/53178 , Y10T29/53183
摘要： A magnetic detection apparatus can be improved in its product yield. The magnetic detection apparatus includes a resin compact having a the magnet arranged in opposition to an object to be detected for generating a magnetic field, an IC chip with a magnetic detection part built therein for detecting a change in the magnetic field in accordance with movement of the object to be detected, and an IC package in which a lead frame having the IC chip installed thereon is sealed with a resin. A method for manufacturing such a magnetic detection apparatus includes a signal adjustment step for adjusting a signal generated from the magnetic detection part in a state in which the magnetic field is applied to the magnetic detection part to correct a deviation of the signal of the magnetic detection part generated in accordance with a relative displacement between the magnetic detection part and the magnet.
摘要翻译： 可以提高磁性检测装置的产量。 磁检测装置包括具有与要检测的物体相对地布置的用于产生磁场的磁体的树脂压块，其中内置有磁检测部的IC芯片，用于根据磁场检测装置的运动来检测磁场的变化 要检测的对象以及其中安装有IC芯片的引线框用树脂密封的IC封装。 一种用于制造这种磁检测装置的方法包括：信号调整步骤，用于在将磁场施加到磁检测部分的状态下调整从磁检测部分产生的信号，以校正磁检测信号的偏差 根据磁检测部和磁铁之间的相对位移产生的部分。
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公开(公告)号：US06577122B2
公开(公告)日：2003-06-10
申请号：US09902721
申请日：2001-07-12
申请人： Masahiro Yokotani , Izuru Shinjo , Takuji Nada , Tatsuya Fukami
发明人： Masahiro Yokotani , Izuru Shinjo , Takuji Nada , Tatsuya Fukami
IPC分类号： G01B730
摘要： A magnetic detection apparatus is able to ensure good performance in detecting the position of an detected portion even with a shift or displacement in the position of a magnetoelectric conversion element. The magnetic detection apparatus includes at least one magnetoelectric conversion element 15 disposed to face one of teeth 12a and grooves 12b of a rotating member 11, a magnet 14 with a direction of magnetization thereof oriented in a direction perpendicular to a radial direction of the rotating member 11 in which the magnet 14 faces the rotating member 11, and a magnetic guide 21 having a first pole projection 21a and a second pole projection 21b formed in a spaced apart relation with respect to each other in a radial direction of the magnetic moving object in which the magnetic guide 21 faces one of the teeth 21a and the grooves 21b of the rotating member 11. The at least one magnetoelectric conversion element is disposed between the first and second pole projections when viewed from a direction perpendicular to the radial direction of the magnetic moving object in which the magnetic guide faces one of the teeth 21a and the grooves 21b of the rotating member 11.
摘要翻译： 磁性检测装置即使在磁电转换元件的位置上的位移偏移也能够确保检测到的部分的位置的良好性能。 磁检测装置包括至少一个面向旋转部件11的齿12a和凹槽12b之一的磁电转换元件15，磁化方向的磁体14沿与旋转部件11的径向垂直的方向 磁体14与旋转构件11对置的磁铁11，以及具有第一磁极突起21a和第二磁极突起21b的导磁体21，该第一磁极突起21a和第二磁极突起21b沿着磁性移动物体的径向彼此间隔开地形成 其中磁导体21面向旋转构件11的齿21a和凹槽21b中的一个。当从与磁体的径向方向垂直的方向观察时，至少一个磁电转换元件设置在第一和第二极突起之间 磁导体面对旋转构件11的齿21a和凹槽21b之一的移动体。
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公开(公告)号：US06194893B1
公开(公告)日：2001-02-27
申请号：US09162887
申请日：1998-09-30
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。
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8.发明授权Magnetic detector wherein the magnetic flux crosses the sensing elements at a predetermined angle 失效磁检测器，其中磁通量以预定角度穿过感测元件
公开(公告)号：US6111403A
公开(公告)日：2000-08-29
申请号：US161675
申请日：1998-09-29
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。
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公开(公告)号：US06977497B1
公开(公告)日：2005-12-20
申请号：US10990391
申请日：2004-11-18
申请人： Masahiro Yokotani , Izuru Shinjo
发明人： Masahiro Yokotani , Izuru Shinjo
CPC分类号： G01D5/147
摘要： A magnetoelectric converting element is constructed by four or more magnetic resistance segments symmetrically arranged at a predetermined pitch with respect to the central line of a magnet perpendicular to the rotating direction of a magnetic moving body. The magnetizing direction of the magnet is set to the direction perpendicular to the direction opposed to the magnetic moving body. Further, 0.7P≦X≦P and P≦Y≦1.6P are set when the size of the magnet in the moving direction of the magnetic moving body is set to X and the size of the magnet in the direction opposed to the magnetic moving body is set to Y and the pitch of the magnetic resistance segments at both ends constituting the magnetoelectric converting element is set to P.
摘要翻译： 磁电转换元件由相对于垂直于磁性移动体的旋转方向的磁体的中心线以预定间距对称布置的四个或更多个磁阻部分构成。 磁体的磁化方向被设定为与与磁性移动体相反的方向垂直的方向。 此外，当磁体在磁性移动体的移动方向上的尺寸设定为X并且磁体在相反方向上的尺寸设定为0.7P <= X <= P且P <= Y <= 1.6P 磁体移动体的距离设定为Y，构成磁电转换元件的两端的磁阻段的间距设为P.
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公开(公告)号：US06819101B2
公开(公告)日：2004-11-16
申请号：US10422782
申请日：2003-04-25
申请人： Masahiro Yokotani , Izuru Shinjo , Noriaki Hayashi
发明人： Masahiro Yokotani , Izuru Shinjo , Noriaki Hayashi
IPC分类号： G01B730
摘要： A magnetic detector includes a moving body which is multipole-magnetized and which is rotated synchronously with a rotational axis; a magnetic resistance element for detecting a change in magnetic field of the rotating moving body; a processing circuit portion for outputting a signal corresponding to the multipole magnetization of the moving body in accordance with the change in resistance value of the magnetic resistance element due to the change in magnetic field; and a magnet for applying a bias magnetic field to the magnetic resistance element.
摘要翻译： 磁检测器包括多极磁化并与旋转轴线同步旋转的移动体; 用于检测旋转移动体的磁场变化的磁阻元件; 处理电路部分，用于根据磁场变化引起的磁阻元件的电阻值的变化，输出与移动体的多极磁化相对应的信号; 以及用于向磁阻元件施加偏置磁场的磁体。
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