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1.发明授权Magnetoresistive type position sensor having bias magnetic and magnet resistance elements in bias magnetic field thereof 失效在其偏磁场中具有偏置磁阻和磁阻元件的磁阻型位置传感器
公开(公告)号：US6020736A
公开(公告)日：2000-02-01
申请号：US511621
申请日：1995-08-07
申请人： Seiki Aoyama , Yasuaki Makino , Susumu Kuroyanagi , Izuru Shoji , Ichiro Izawa
发明人： Seiki Aoyama , Yasuaki Makino , Susumu Kuroyanagi , Izuru Shoji , Ichiro Izawa
摘要： A rotation object is made of a magnetic material and disposed within a predetermined range of an angle of rotation on a plane perpendicular to an axis of rotation. A bias magnet generates a bias magnetic field to the rotation body in a direction perpendicular to the axis of rotation. Magnetic resistance elements are disposed in the bias magnetic field on a plane including the axis of rotation at a position deviated from the position of the rotation object in the axial direction of the rotation body and inclined by about 45.degree. relative to a direction perpendicular to the axis of rotation.
摘要翻译： 旋转物体由磁性材料制成，并且设置在垂直于旋转轴线的平面上的旋转角度的预定范围内。 偏置磁体在垂直于旋转轴线的方向上向旋转体产生偏置磁场。 磁阻元件设置在包括旋转轴在旋转体的轴向方向上偏离旋转体的位置的旋转轴的平面上，并相对于垂直于旋转体的方向倾斜约45°的偏置磁场 旋转轴。
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2.发明授权Magnetic detection device having a magnet including a stepped portion for eliminating turbulence at the MR sensor 失效磁性检测装置具有包括用于消除MR传感器处的湍流的阶梯部分的磁体
公开(公告)号：US5637995A
公开(公告)日：1997-06-10
申请号：US407999
申请日：1995-03-21
申请人： Ichiro Izawa , Yasuaki Makino , Susumu Kuroyanagi , Seiki Aoyama , Shigehiro Kasumi , Kenji Yagi , Kazuo Kajimoto , Masaki Takashima , Shinichi Konda
发明人： Ichiro Izawa , Yasuaki Makino , Susumu Kuroyanagi , Seiki Aoyama , Shigehiro Kasumi , Kenji Yagi , Kazuo Kajimoto , Masaki Takashima , Shinichi Konda
摘要： A magnetic detection device including a biasing magnet for generating a bias magnetic field directed to an object of detection having a magnetic material; a magnetoresistance effective element disposed at an inclination of about 45.degree. to the direction of the bias magnetic field to provide a change in resistance caused by the bias magnetic field in accordance with movement of the object of detection, so as to detect a change in state of the bias magnetic field via the change in resistance of the magnetoresistance effective element; and the biasing magnet having a hollow portion containing a holder for holding the magnetoresistance effective element in a position between a surface of the biasing magnet and the object of detection and close to the surface of the biasing element.
摘要翻译： 一种磁检测装置，包括用于产生指向具有磁性材料的检测对象的偏置磁场的偏置磁体; 磁阻有效元件以与偏置磁场方向成大约45度的倾斜度设置，以根据检测对象的移动来提供由偏置磁场引起的电阻变化，从而检测状态的变化 通过磁阻有效元件的电阻变化来产生偏置磁场; 所述偏置磁体具有中空部，所述中空部包含用于将所述磁阻有效元件保持在所述偏置磁体的表面与所述检测体之间并且靠近所述偏置元件的表面的位置的保持器。
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3.发明授权
公开(公告)号：US5644226A
公开(公告)日：1997-07-01
申请号：US396241
申请日：1995-03-01
申请人： Seiki Aoyama , Susumu Kuroyanagi , Ichirou Izawa , Yasuaki Makino
发明人： Seiki Aoyama , Susumu Kuroyanagi , Ichirou Izawa , Yasuaki Makino
摘要： A magnetic detector which is small in size and is capable of preventing the occurrence of deformation in the waveform representing a change in the resistance. A bias magnet 2 is adhered to the support plate 1. A bias magnetic field is generated by the bias magnet 2 toward a gear 7. A substrate 3 is adhered onto the support plate 1, and magneto resistance elements are formed on the substrate 3 by vacuum evaporation. The magneto resistance elements are disposed in parallel with the magnetized surface of the bias magnet 2. The magneto resistance elements are disposed being tilted by about 45 degrees with respect to a vector that is in parallel with the N-pole surface of the bias magnet 2 in the bias magnetic field and is directed toward the outer peripheral edge. Due to the revolution of the gear 7, a change in the resistance takes place in the magneto resistance elements due to a change in the vector which is parallel with the N-pole surface of the bias magnet 2 in the bias magnetic field generated by the bias magnet 2 towards gear 7 and is directed toward the outer peripheral edge.
摘要翻译： 一种磁检测器，其尺寸小并且能够防止在表示电阻变化的波形中出现变形。 偏置磁铁2粘附到支撑板1上。偏置磁铁2向齿轮7产生偏置磁场。基板3粘附到支撑板1上，并且磁阻元件通过 真空蒸发。 磁阻元件与偏置磁体2的磁化表面平行设置。磁阻元件相对于与偏置磁体2的N极表面平行的矢量倾斜约45度 在偏置磁场中并且被引向外周边缘。 由于齿轮7的旋转，由于与由偏置磁铁2的N极表面平行的矢量的变化在磁阻元件中产生的偏置磁场中的电阻发生变化， 偏置磁体2朝向齿轮7并被引向外周边缘。
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公开(公告)号：US5493219A
公开(公告)日：1996-02-20
申请号：US227649
申请日：1994-04-14
CPC分类号： G01D5/24476 , G01D1/12 , G01D5/2448 , G01D5/2457 , H03K5/088
摘要： A peak hold circuit 11 holds a peak value of an output signal from a rotating angle sensor 6. A bottom hold circuit 12 holds a bottom value of the output signal from the rotating angle sensor 6. A threshold value is set from the peak value by the peak hold circuit 11 and the bottom value by the bottom hold circuit 12 by resistors 24 to 27, analog switches 28 and 29 and a NOT circuit 31. A comparator 10 compares the output signal of the rotating angle sensor 6 with the set value thus set, and outputs a binary signal (digitized signal) in accordance with the comparison result.
摘要翻译： 峰值保持电路11保持来自旋转角度传感器6的输出信号的峰值。底部保持电路12保持来自旋转角度传感器6的输出信号的底部值。将阈值从峰值设定为 峰值保持电路11和底部保持电路12的底部值由电阻器24至27，模拟开关28和29以及NOT电路31.比较器10将旋转角度传感器6的输出信号与设定值进行比较 根据比较结果输出二进制信号（数字化信号）。
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公开(公告)号：US5841276A
公开(公告)日：1998-11-24
申请号：US645261
申请日：1996-05-13
申请人： Yasuaki Makino , Seiki Aoyama , Toshikazu Arasuna
发明人： Yasuaki Makino , Seiki Aoyama , Toshikazu Arasuna
摘要： A noncontact type rotation sensor, which can detect the rotational movement of a gear with high sensitivity and precision without causing any erroneous output, is disclosed. To a magnetic gear is applied a bias magnetic field by a bias magnet from the direction of the teeth of the gear. A sensor part disposed within the bias magnetic field comprises a substrate and a plurality of magneto-resistive elements mounted on the substrate in parallel to the teeth of the gear and electrically connected in series one after another. The sensor part detects the magnetic vector of the bias magnetic field varying according to the rotation of the gear as the composite value of the variations of the resistance values of the plurality of magneto-resistive elements connected in series one after another. The plurality of magneto-resistive elements are arranged with interval and width that enable the plurality of magneto-resistive elements to absorb the erroneous output caused to the variation waveforms of the respective resistance values during power supply.
摘要翻译： 公开了一种非接触式旋转传感器，其能够以高灵敏度和精度检测齿轮的旋转运动而不引起任何错误的输出。 磁齿轮通过偏置磁铁从齿轮的齿的方向施加偏置磁场。 设置在偏置磁场内的传感器部分包括基板和多个安装在基板上的磁阻元件，平行于齿轮的齿并且彼此串联电连接。 传感器部分检测根据齿轮的旋转而变化的偏置磁场的磁矢量，作为多个磁阻元件的电阻值的变化的复合值一个接一个地串联连接。 多个磁阻元件以间隔和宽度布置，使得多个磁阻元件能够吸收由于在电源期间各个电阻值的变化波形引起的错误输出。
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公开(公告)号：US5854572A
公开(公告)日：1998-12-29
申请号：US867743
申请日：1997-06-03
申请人： Seiki Aoyama , Yasuaki Makino
发明人： Seiki Aoyama , Yasuaki Makino
CPC分类号： H03G3/3026 , G01P21/02 , G01P3/488
摘要： An automatic gain control circuit for controlling the gain of an amplifier amplifying an ac signal is provided which includes a resistance circuit, a comparing circuit, a gain control determining circuit, and a gain controlling circuit. The resistance circuit includes a plurality of resistors connected in series through taps. The comparing circuit compares an output signal of the amplifier with reference upper and lower limit values to determine whether the output signal of the amplifier is within a desired amplitude range of the reference upper limit value to the reference lower limit value or not. The gain control determining circuit determines whether the output signal of the amplifier has exceeded the upper and lower limit values sequentially during a complete cycle thereof for determining whether the gain of the amplifier should be changed or not. The gain controlling circuit selectively short-circuits the taps on both sides of each of the resistors of the resistance circuit to change a total resistance of the resistance circuit for controlling the gain of the amplifier when the output signal of the amplifier has exceeded the upper and lower limit values sequentially.
摘要翻译： 提供一种用于控制放大ac信号的放大器的增益的自动增益控制电路，其包括电阻电路，比较电路，增益控制确定电路和增益控制电路。 电阻电路包括通过抽头串联连接的多个电阻器。 比较电路将放大器的输出信号与基准上限值和下限值进行比较，以确定放大器的输出信号是否在基准上限值的期望幅度范围内至参考下限值。 增益控制确定电路在其完整循环期间确定放大器的输出信号是否顺序地超过上限值和下限值，以确定放大器的增益是否应改变。 增益控制电路选择性地短路电阻电路的每个电阻器的两侧的抽头，以改变当放大器的输出信号超过上限时控制放大器的增益的电阻电路的总电阻， 下限值。
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7.发明授权公开(公告)号：US06252395B1
公开(公告)日：2001-06-26
申请号：US09244845
申请日：1999-02-04
申请人： Seiki Aoyama , Yasuaki Makino , Takeshi Shinoda
发明人： Seiki Aoyama , Yasuaki Makino , Takeshi Shinoda
IPC分类号： G01B730
CPC分类号： G01D5/147 , G01D3/032 , G01D5/24428 , G01D5/2448 , G01R33/09
摘要： Magnetic resistive elements 4 and 5 cooperatively detect the change of the magnetic field responsive to the rotation of a gear 2 fixed to a shaft 1. An amplification circuit 6 comprises an operational amplifier 7 having an input terminal to which a gain-determining input resistor 8 is connected. A gain-determining feedback resistor 9 is provided in a feedback path of the operational amplifier 7. The gain-determining resistors 8 and 9 are formed by a P well region and a P+ region of a MOS process element. The temperature characteristics of the gain-determining resistor 8 and 9 are opposed to that of the magnetic resistive elements 4 and 5. The temperature characteristics of the gain of the operational amplifier 7 cancel the temperature characteristics of the magnetic resistive elements 4 and 5.
摘要翻译： 磁阻元件4和5响应于固定在轴1上的齿轮2的旋转协调地检测磁场的变化。放大电路6包括运算放大器7，其具有输入端，增益确定输入电阻器8 已连接。 增益确定反馈电阻器9设置在运算放大器7的反馈路径中。增益确定电阻器8和9由MOS工艺元件的P阱区域和P +区域形成。 增益确定电阻器8和9的温度特性与磁阻元件4和5的温度特性相反。运算放大器7的增益的温度特性消除了磁阻元件4和5的温度特性。
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公开(公告)号：US5656936A
公开(公告)日：1997-08-12
申请号：US588329
申请日：1996-01-18
申请人： Kenichi Ao , Yoshimi Yoshino , Yasuaki Makino , Seiki Aoyama
发明人： Kenichi Ao , Yoshimi Yoshino , Yasuaki Makino , Seiki Aoyama
摘要： A displacement detector to obtain high-precision displacement detection with a small-sized, low-cost apparatus. A displacement detector comprises rectangular teeth formed on the outer circumference surface at a pitch of .lambda., a gearwheel made of a magnetic material, a magnet having a width larger than the pitch .lambda. of the gearwheel and so disposed that the N-pole thereof faces the teeth, and a pair of MREs constructed by alternately connecting the long strip portions and short strip portions thereof to have a zigzag shape. A uniform cyclic magnet field from the magnet to the gearwheel is formed within a gap between the gearwheel and the magnet. On the same phase of the magnet field are disposed the pair of MREs so that the directions of the long strip portions thereof and the directions of the magnetic force lines make angles of approximately 45.degree. and approximately 135.degree., respectively.
摘要翻译： 一种位移检测器，用小型，低成本的装置获得高精度位移检测。 位移检测器包括以λ的间距形成在外圆周表面上的矩形齿，由磁性材料制成的齿轮，具有大于齿轮的间距λ的宽度的磁体，并且被布置成使得其N极面向 齿，以及通过交替地将长带部分和短条带部分交替地连接以形成锯齿形的一对MRE。 在磁体和磁体之间的间隙内形成有从磁体到齿轮的均匀的循环磁场。 在磁场的相同相位上设置一对MRE，使得其长条状部分的方向和磁力线的方向分别为大约45度和大约135度的角度。
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9.发明授权Position detector including a reference position wherein the sensor is saturating the MR sensor for preventing hysteresis and in a bridge circuit 失效位置检测器，其包括参考位置，其中传感器饱和MR传感器以防止滞后和桥接电路
公开(公告)号：US5574364A
公开(公告)日：1996-11-12
申请号：US199337
申请日：1994-02-18
申请人： Kazuo Kajimoto , Tomoatsu Makino , Yasuaki Makino , Seiki Aoyama
发明人： Kazuo Kajimoto , Tomoatsu Makino , Yasuaki Makino , Seiki Aoyama
CPC分类号： G01D5/145 , F02D41/009 , G01D5/2457
摘要： A position detector which provides improved reference position detecting precision by stabilizing the output signal from magnetoelectric transducers in a reference position part. A rotor has a magnetized surface alternately provided with different magnetic poles and a reference positional part in which magnetic poles provided on the magnetized surface are partly omitted. A rotational angle sensor has MR elements laid out thereon in opposition to the magnetized surface of the rotor to output the voltage signal VS according to the magnetic field intensity in the magnetized surface due to the rotation of the rotor. A waveform processing circuit and a pulse signal processing signal shape the waveform of the voltage signal from the rotational angle sensor, and also generate the rotational angle pulse signal and a reference position pulse signal according to the waveform reforming signal. The reference positional part is arranged so that the magnetic field intensity therein can be within the saturation magnetic field region of the Mr elements.
摘要翻译： 一种位置检测器，其通过稳定来自参考位置部分中的来自磁电换能器的输出信号来提供改进的参考位置检测精度。 转子具有交替设置有不同磁极的磁化面和部分省略设置在磁化面上的磁极的基准位置部。 旋转角度传感器在其上布置有与元件的磁化表面相对的MR元件，以根据转子旋转而根据磁化表面中的磁场强度输出电压信号VS。 波形处理电路和脉冲信号处理信号对来自旋转角度传感器的电压信号的波形进行整形，并根据波形重整信号产生旋转角脉冲信号和基准位置脉冲信号。 参考位置部分被布置成使得其中的磁场强度可以在Mr元件的饱和磁场区域内。
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公开(公告)号：US07129798B2
公开(公告)日：2006-10-31
申请号：US10678132
申请日：2003-10-06
申请人： Seiki Aoyama , Toshikazu Itakura
发明人： Seiki Aoyama , Toshikazu Itakura
IPC分类号： H03B5/20
CPC分类号： H03K3/0315 , H03K3/011 , H03K3/0231 , H03L1/02
摘要： An oscillator includes first, second and third inverters (1, 2, 3) connected in series. A feedback path is connected from the output terminal of the third inverter (3) to the input terminal of the first inverter 1 through a resistor (5) while a second feedback path is connected from the output terminal of the second inverter (2) to the input terminal of the first inverter (1) through a capacitor (4). The second feedback path further includes a resistor (6) having a temperature coefficient larger than that of resistor (5) is inserted to adjust the charge/discharge trigger voltage and charge/discharge time of the capacitor (4).
摘要翻译： 振荡器包括串联连接的第一，第二和第三反相器（1,2,3）。 反馈路径通过电阻器（5）从第三反相器（3）的输出端子连接到第一反相器1的输入端子，而第二反馈路径从第二逆变器（2）的输出端子连接到 第一反相器（1）的输入端通过电容器（4）。 第二反馈路径还包括具有大于电阻器（5）的温度系数的电阻器（6）的电阻器（6），以调整充电/放电触发电压和电容器（4）的充电/放电时间。
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