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：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：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。

公开(公告)号：US07265541B1

公开(公告)日：2007-09-04

申请号：US11466560

申请日：2006-08-23

申请人： Masahiro Yokotani ,  Naoki Hiraoka

发明人： Masahiro Yokotani ,  Naoki Hiraoka

IPC分类号： G01B7/30

CPC分类号： G01D5/2451 ,  G01D5/145 ,  G01R33/072

摘要： The magnetic sensor in the invention includes a detecting section that detects a change of magnetic flux due to a movement of the magnetic movable, comparator circuits constituting a converting section that converts a change of magnetic flux detected by the detecting section into an electric amount, and a D-FF circuit device, in a sensor unit having a power-supplying power terminal VB, a ground terminal GND and an output terminal VOUT. A current control section is provided to change the amount of current flowing through at least one of the power terminal and the ground terminal, correspondingly to a moving direction of the magnetic movable. Thus, a moving direction of the magnetic movable can be determined depending upon the amount of current.

摘要翻译： 本发明的磁传感器包括：检测部，其检测由构成转换部的磁性可动的比较器电路的移动引起的磁通变化;转换部，其将由检测部检测出的磁通的变化转换为电量;以及 在具有供电电源端子VB，接地端子GND和输出端子VOUT的传感器单元中的D-FF电路装置。 提供电流控制部分，用于相应于磁性可移动的移动方向改变流过电源端子和接地端子中的至少一个的电流量。 因此，可以根据电流量确定磁性移动体的移动方向。

公开(公告)号：US20070200561A1

公开(公告)日：2007-08-30

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： G01B7/30

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：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：US07468604B2

公开(公告)日：2008-12-23

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。

公开(公告)号：US07157904B1

公开(公告)日：2007-01-02

申请号：US11447104

申请日：2006-06-06

申请人： Masahiro Yokotani ,  Naoki Hiraoka

发明人： Masahiro Yokotani ,  Naoki Hiraoka

IPC分类号： G01B7/30

CPC分类号： G01D5/147

摘要： A magnetic detection apparatus is able to make a selection between AC coupling and DC coupling thereby to improve the accuracy of a final output signal corresponding to a magnetic movable element, thus making it possible to ensure excellent detection performance. The magnetic detection apparatus with a sensor composed of magnetoresistive elements (2a, 2b) for detecting the strength of a magnetic field includes a first comparison circuit (31) that has a first comparison level (VR1), and waveform shapes the amplitude of a detection signal (C) from the magnetoresistive elements (2a, 2b) through DC coupling, a second comparison circuit (32) that has a second comparison level (VR2), and waveform shapes the amplitude of the detection signal C through DC coupling, and a third comparison circuit (33) that has a third comparison level VR3, and waveform shapes the amplitude of the detection signal C after AC coupling.

摘要翻译： 磁检测装置能够进行交流耦合和直流耦合之间的选择，从而提高对应于磁性可移动元件的最终输出信号的精度，从而可以确保优异的检测性能。 具有由用于检测磁场强度的磁阻元件（2a，2b）组成的传感器的磁检测装置包括具有第一比较电平（VR 1）的第一比较电路（31），波形使振幅 通过DC耦合来自磁阻元件（2a，2b）的检测信号（C）;具有第二比较电平（VR2）的第二比较电路（32），以及波形使检测信号C 以及具有第三比较电平VR 3的第三比较电路（33），并且在AC耦合之后波形对检测信号C的幅度进行整形。