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公开(公告)号：US20050270018A1
公开(公告)日：2005-12-08
申请号：US11002234
申请日：2004-12-03
CPC分类号： G01D5/147
摘要： The invention provides a magnetic detector that exerts no influence on detection accuracy of a magnetic movable body, being a detected body, even if relative positions of magnetic resistance elements and a magnet are out of alignment due to variation occurred in manufacturing process. A magnetic detector includes: a magnetic field detection part constructed of at least two magnetic resistance elements; a magnet for applying a magnetic field to the magnetic resistance elements; a magnetic movable body for changing the magnetic field that is generated by the magnet; and a processing circuit part for outputting a signal based on the change in resistance values of the magnetic resistance elements due to the change in the magnetic field; and in which a shape of the magnetic resistance elements is symmetric with respect to a point.
摘要翻译： 本发明提供了一种磁检测器，即使由于制造过程中出现的变化而导致磁阻元件和磁体的相对位置不对准，也不会对作为检测体的磁性可移动体的检测精度产生影响。 磁检测器包括：由至少两个磁阻元件构成的磁场检测部; 用于向磁阻元件施加磁场的磁体; 用于改变由磁体产生的磁场的磁性移动体; 以及处理电路部分，用于基于磁场的变化而基于磁阻元件的电阻值的变化输出信号; 并且其中磁阻元件的形状相对于点对称。
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公开(公告)号：US07557567B2
公开(公告)日：2009-07-07
申请号：US11946438
申请日：2007-11-28
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。
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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：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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16.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：US5801529A
公开(公告)日：1998-09-01
申请号：US740623
申请日：1996-10-31
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。
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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
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。
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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）。
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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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