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21.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：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
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。
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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：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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公开(公告)号：US06392407B1
公开(公告)日：2002-05-21
申请号：US09994679
申请日：2001-11-28
申请人： Naohiro Mishiro , Izuru Shinjo , Masahiro Yokotani
发明人： Naohiro Mishiro , Izuru Shinjo , Masahiro Yokotani
IPC分类号： G01B730
CPC分类号： G01D5/145
摘要： In a rotation angle detecting device, a circuit scale thereof is reduced and a manufacturing cost thereof is lowered. The rotation angle detecting device is arranged by comprising: a bridge circuit for converting a magnetic field change of an MR element into a voltage change; a 1st differential amplifying circuit for amplifying the signal outputted from the bridge circuit; an AC coupling circuit for removing a DC component from the output signal of the 1st differential amplifying circuit; a 2nd differential amplifying circuit for amplifying the signal output from the AC coupling circuit; a comparing circuit for comparing the signal outputted from the 2nd differential amplifying circuit with a reference value to thereby output any one of a signal of “0” and a signal of “1”; an output circuit for waveform-shaping the signal outputted from the comparing circuit; and an initiating circuit including a 1st to a 3rd transistors, and a differentiating circuit for driving the 1st to 3rd transistors; in which both the 1st and the 2nd transistors are connected to the AC coupling circuit so as to converge the output signal of the AC coupling circuit into a reference voltage immediately after a power supply is turned ON; and in which the 3rd transistor is connected to the comparing circuit so as to also converge the input signal of the comparing circuit into an AC coupling reference level.
摘要翻译： 在旋转角度检测装置中，其电路规模减小，制造成本降低。 所述旋转角度检测装置的特征在于包括：用于将MR元件的磁场变化转换为电压变化的桥接电路; 第一差分放大电路，用于放大从桥式电路输出的信号; AC耦合电路，用于从第一差分放大电路的输出信号中去除DC分量; 用于放大从AC耦合电路输出的信号的第二差分放大电路; 比较电路，用于将从第二差分放大电路输出的信号与参考值进行比较，从而输出信号“0”和信号“1”中的任何一个; 用于对从比较电路输出的信号进行波形整形的输出电路; 以及包括第1至第3晶体管的启动电路和用于驱动第1至第3晶体管的微分电路; 其中第一和第二晶体管都连接到AC耦合电路，以便在电源接通之后立即将AC耦合电路的输出信号收敛成参考电压; 并且其中第三晶体管连接到比较电路，以便也将比较电路的输入信号收敛成AC耦合参考电平。
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27.发明授权Magnetic detector with improved temperature characteristic and noise resistance 有权具有改善温度特性和抗噪声性能的磁性探测器公开(公告)号：US06246234B1
公开(公告)日：2001-06-12
申请号：US09175413
申请日：1998-10-20
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。
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公开(公告)号：US20070163104A1
公开(公告)日：2007-07-19
申请号：US11536106
申请日：2006-09-28
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： 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品产量。 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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29.发明授权公开(公告)号：US07053605B2
公开(公告)日：2006-05-30
申请号：US10971108
申请日：2004-10-25
IPC分类号： G01B7/30
CPC分类号： G01D5/145
摘要： There is provided a rotation information detecting apparatus which suppresses noise superimposed on an output line and can prevent detection of erroneous rotation information. A periodic changing magnetic field is applied to a detection element according to the rotation of a rotation object, and rotation information is detected. A signal processing circuit includes an output circuit for generating a binary output signal changing between a high level and a low level according to the rotation of the rotation object. The output circuit includes an output transistor, an output line connected to the output transister, a power supply terminal for the output transistor, and a noise suppression circuit connected between the output line and the power supply terminal a power supply terminal. The noise suppression circuit includes a diode and a current limiting resistor.
摘要翻译： 提供一种旋转信息检测装置，其抑制叠加在输出线上的噪声，并且可以防止错误旋转信息的检测。 根据旋转对象的旋转将周期性变化的磁场施加到检测元件，并且检测旋转信息。 信号处理电路包括输出电路，用于根据旋转对象的旋转产生在高电平和低电平之间变化的二进制输出信号。 输出电路包括输出晶体管，连接到输出转换器的输出线，输出晶体管的电源端以及连接在输出线和电源端之间的电源端的噪声抑制电路。 噪声抑制电路包括二极管和限流电阻。
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公开(公告)号：US20050270019A1
公开(公告)日：2005-12-08
申请号：US10971108
申请日：2004-10-25
CPC分类号： G01D5/145
摘要： There is provided a rotation information detecting apparatus which suppresses noise superimposed on an output line and can prevent detection of erroneous rotation information. A periodic changing magnetic field is applied to a detection element according to the rotation of a rotation object, and rotation information is detected. A signal processing circuit includes an output circuit for generating a binary output signal changing between a high level and a low level according to the rotation of the rotation object. The output circuit includes an output transistor, an output line connected to the output transister, a power supply terminal for the output transistor, and a noise suppression circuit connected between the output line and the power supply terminal a power supply terminal. The noise suppression circuit includes a diode and a current limiting resistor.
摘要翻译： 提供一种旋转信息检测装置，其抑制叠加在输出线上的噪声，并且可以防止错误旋转信息的检测。 根据旋转对象的旋转将周期性变化的磁场施加到检测元件，并且检测旋转信息。 信号处理电路包括输出电路，用于根据旋转对象的旋转产生在高电平和低电平之间变化的二进制输出信号。 输出电路包括输出晶体管，连接到输出转换器的输出线，输出晶体管的电源端以及连接在输出线和电源端之间的电源端的噪声抑制电路。 噪声抑制电路包括二极管和限流电阻。
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