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公开(公告)号：US07640815B2
公开(公告)日：2010-01-05
申请号：US11723071
申请日：2007-03-16
申请人： Atsuhiko Yoneda , Yasuo Shimizu , Shunichiro Sueyoshi , Yoshihiro Oniwa , Yutaka Arimura , Takashi Miyoshi
发明人： Atsuhiko Yoneda , Yasuo Shimizu , Shunichiro Sueyoshi , Yoshihiro Oniwa , Yutaka Arimura , Takashi Miyoshi
IPC分类号： G01L3/00
摘要： A magnetostriction type torque sensor is provided which includes magnetic property change material which is provided on a shaft and whose magnetic property changes in accordance with torque applied to the shaft, an excitation signal generator which generates an excitation signal whose voltage is converted into a predetermined voltage through a switching element, a plurality of detection coils to which the excitation signal generator applies the excitation signal, and which plurality of detection coils outputs voltage, which changes in accordance with change in the magnetic property of the magnetic property change material, between connection points between the detection coils, and an operational state monitor which monitors an operational state of the switching element.
摘要翻译： 提供一种磁致伸缩式转矩传感器，其包括设置在轴上并且其磁特性根据施加到轴的扭矩而变化的磁性变化材料，产生其电压被转换为预定电压的激励信号的激励信号发生器 通过开关元件，激励信号发生器施加激励信号的多个检测线圈，以及多个检测线圈输出根据磁性能改变材料的磁特性的变化在连接点之间变化的电压 在检测线圈之间，以及操作状态监视器，其监视开关元件的工作状态。
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公开(公告)号：US20070283768A1
公开(公告)日：2007-12-13
申请号：US11723071
申请日：2007-03-16
申请人： Atsuhiko Yoneda , Yasuo Shimizu , Shunichiro Sueyoshi , Yoshihiro Oniwa , Yutaka Arimura , Takashi Miyoshi
发明人： Atsuhiko Yoneda , Yasuo Shimizu , Shunichiro Sueyoshi , Yoshihiro Oniwa , Yutaka Arimura , Takashi Miyoshi
IPC分类号： G01L3/00
摘要： A magnetostriction type torque sensor is provided which includes magnetic property change material which is provided on a shaft and whose magnetic property changes in accordance with torque applied to the shaft, an excitation signal generator which generates an excitation signal whose voltage is converted into a predetermined voltage through a switching element, a plurality of detection coils to which the excitation signal generator applies the excitation signal, and which plurality of detection coils outputs voltage, which changes in accordance with change in the magnetic property of the magnetic property change material, between connection points between the detection coils, and an operational state monitor which monitors an operational state of the switching element.
摘要翻译： 提供一种磁致伸缩式转矩传感器，其包括设置在轴上并且其磁特性根据施加到轴的扭矩而变化的磁性变化材料，产生其电压被转换为预定电压的激励信号的激励信号发生器 通过开关元件，激励信号发生器施加激励信号的多个检测线圈，以及多个检测线圈输出根据磁性能改变材料的磁特性的变化在连接点之间变化的电压 在检测线圈之间，以及操作状态监视器，其监视开关元件的工作状态。
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公开(公告)号：US20070240522A1
公开(公告)日：2007-10-18
申请号：US11818071
申请日：2007-06-13
IPC分类号： G01L3/10
摘要： A magnetostrictive torque sensor includes first and second magnetostrictive films which are provided at a shaft and have different magnetic anisotropies; a first measurement coil and a second measurement coil which face the first magnetostrictive film; and a third measurement coil and a fourth measurement coil which face the second magnetostrictive film. A torque applied to the shaft is measured based on a variation in magnetic characteristics of the first and the second magnetostrictive films; and a failure of the magnetostrictive torque sensor is detected based on a first difference between output values from the first and the second measurement coils and a second difference between output values from the third and the fourth measurement coils. An electric steering system includes the magnetostrictive torque sensor for measuring a steering torque of the system; and an electric motor driven based on the measured magnetostrictive torque for steering the vehicle.
摘要翻译： 磁致伸缩扭矩传感器包括第一和第二磁致伸缩膜，其设置在轴处并具有不同的磁各向异性; 面对第一磁致伸缩膜的第一测量线圈和第二测量线圈; 以及面对第二磁致伸缩膜的第三测量线圈和第四测量线圈。 基于第一和第二磁致伸缩膜的磁特性的变化来测量施加到轴的扭矩; 并且基于来自第一和第二测量线圈的输出值之间的第一差异和来自第三和第四测量线圈的输出值之间的第二差值来检测磁致伸缩扭矩传感器的故障。 电动转向系统包括用于测量系统的转向转矩的磁致伸缩扭矩传感器; 以及基于用于转向车辆的测量的磁致伸缩扭矩驱动的电动马达。
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公开(公告)号：US07506554B2
公开(公告)日：2009-03-24
申请号：US11818071
申请日：2007-06-13
IPC分类号： G01L3/00
摘要： A magnetostrictive torque sensor includes first and second magnetostrictive films which are provided at a shaft and have different magnetic anisotropies; a first measurement coil and a second measurement coil which face the first magnetostrictive film; and a third measurement coil and a fourth measurement coil which face the second magnetostrictive film. A torque applied to the shaft is measured based on a variation in magnetic characteristics of the first and the second magnetostrictive films; and a failure of the magnetostrictive torque sensor is detected based on a first difference between output values from the first and the second measurement coils and a second difference between output values from the third and the fourth measurement coils. An electric steering system includes the magnetostrictive torque sensor for measuring a steering torque of the system; and an electric motor driven based on the measured magnetostrictive torque for steering the vehicle.
摘要翻译： 磁致伸缩扭矩传感器包括第一和第二磁致伸缩膜，其设置在轴处并具有不同的磁各向异性; 面对第一磁致伸缩膜的第一测量线圈和第二测量线圈; 以及面对第二磁致伸缩膜的第三测量线圈和第四测量线圈。 基于第一和第二磁致伸缩膜的磁特性的变化来测量施加到轴的扭矩; 并且基于来自第一和第二测量线圈的输出值之间的第一差异和来自第三和第四测量线圈的输出值之间的第二差值来检测磁致伸缩扭矩传感器的故障。 电动转向系统包括用于测量系统的转向转矩的磁致伸缩扭矩传感器; 以及基于用于转向车辆的测量的磁致伸缩扭矩驱动的电动马达。
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5.发明申请Magnetostrictive torque sensor system and electric power steering apparatus employing the same 有权磁致伸缩转矩传感器系统和采用该方法的电动助力转向装置公开(公告)号：US20070240523A1
公开(公告)日：2007-10-18
申请号：US11727934
申请日：2007-03-29
IPC分类号： G01L3/00
摘要： A magnetostrictive torque sensor system stabilizes and detects steering torque applied to a steering shaft. The sensor system comprises magnetic-characteristic variation parts that are provided to the steering shaft, wherein magnetic characteristics of the magnetic-characteristic variation parts change in accordance with the applied torque; coils that are positioned around the magnetic-characteristic variation parts and that respond to changes in the magnetic characteristics; resistance elements that are serially connected to the coils; voltage-applying means for periodically applying a voltage to serial circuits that are formed from the coils and the resistance elements; terminals for retrieving changes in the terminal voltage of the coils; phase-shifting means for inverting the phase of the change in the terminal voltage of the coils; selecting means for alternatingly selecting and outputting the voltage change in the terminals and the voltage change in the output ends of the phase-shifting means; and smoothing means for smoothing the voltage signals output from the selecting means and for outputting a direct-current voltage.
摘要翻译： 磁致伸缩扭矩传感器系统稳定并检测施加到转向轴的转向扭矩。 传感器系统包括提供给转向轴的磁特性变化部分，其中磁特性变化部分的磁特性根据施加的转矩而改变; 线圈位于磁特性变化部分周围，并响应于磁特性的变化; 串联连接到线圈的电阻元件; 电压施加装置，用于对由线圈和电阻元件形成的串联电路周期性地施加电压; 用于检索线圈的端子电压变化的端子; 用于使所述线圈的端子电压变化的相位反相的相移装置; 选择装置，用于交替选择和输出端子中的电压变化和相移装置的输出端中的电压变化; 以及平滑装置，用于平滑从选择装置输出的电压信号并输出直流电压。
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6.发明授权Magnetostrictive torque sensor system and electric power steering apparatus employing the same 有权磁致伸缩转矩传感器系统和采用该方法的电动助力转向装置公开(公告)号：US07478568B2
公开(公告)日：2009-01-20
申请号：US11727934
申请日：2007-03-29
IPC分类号： G01L3/00
摘要： A magnetostrictive torque sensor system stabilizes and detects steering torque applied to a steering shaft. The sensor system comprises magnetic-characteristic variation parts that are provided to the steering shaft, wherein magnetic characteristics of the magnetic-characteristic variation parts change in accordance with the applied torque; coils that are positioned around the magnetic-characteristic variation parts and that respond to changes in the magnetic characteristics; resistance elements that are serially connected to the coils; voltage-applying means for periodically applying a voltage to serial circuits that are formed from the coils and the resistance elements; terminals for retrieving changes in the terminal voltage of the coils; phase-shifting means for inverting the phase of the change in the terminal voltage of the coils; selecting means for alternatingly selecting and outputting the voltage change in the terminals and the voltage change in the output ends of the phase-shifting means; and smoothing means for smoothing the voltage signals output from the selecting means and for outputting a direct-current voltage.
摘要翻译： 磁致伸缩扭矩传感器系统稳定并检测施加到转向轴的转向扭矩。 传感器系统包括提供给转向轴的磁特性变化部分，其中磁特性变化部分的磁特性根据施加的转矩而改变; 线圈位于磁特性变化部分周围，并响应于磁特性的变化; 串联连接到线圈的电阻元件; 电压施加装置，用于对由线圈和电阻元件形成的串联电路周期性地施加电压; 用于检索线圈的端子电压变化的端子; 用于使所述线圈的端子电压变化的相位反相的相移装置; 选择装置，用于交替选择和输出端子中的电压变化和相移装置的输出端中的电压变化; 以及平滑装置，用于平滑从选择装置输出的电压信号并输出直流电压。
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公开(公告)号：US20070295111A1
公开(公告)日：2007-12-27
申请号：US11797553
申请日：2007-05-04
申请人： Yasuo Shimizu , Shunichiro Sueyoshi
发明人： Yasuo Shimizu , Shunichiro Sueyoshi
IPC分类号： G01L3/00
摘要： A magnetostrictive torque sensor having a first magnetostrictive film and a second magnetostrictive film, which are both provided on a shaft and have different magnetic anisotropies. A first detection coil and a second detection coil are arranged to face the first magnetostrictive film, and a third detection coil and a fourth detection coil are arranged to face the second magnetostrictive film. The first and second detection coils are wound around the same coil bobbin, while the third and fourth detection coils are wound around another common coil bobbin.
摘要翻译： 一种具有第一磁致伸缩膜和第二磁致伸缩膜的磁致伸缩扭矩传感器，其均设置在轴上并具有不同的磁各向异性。 第一检测线圈和第二检测线圈被布置为面对第一磁致伸缩膜，并且第三检测线圈和第四检测线圈布置成面对第二磁致伸缩膜。 第一和第二检测线圈缠绕在相同的线圈架上，而第三和第四检测线圈缠绕在另一公共线圈架上。
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公开(公告)号：US06978686B2
公开(公告)日：2005-12-27
申请号：US10658832
申请日：2003-09-08
申请人： Yasuo Shimizu , Hisao Asaumi , Shunichiro Sueyoshi
发明人： Yasuo Shimizu , Hisao Asaumi , Shunichiro Sueyoshi
摘要： In a torque sensor having a magnetic metal film with magnetic anisotropy attached to a torque transmission shaft, and an exciting coil and a pair of detector coils each installed near the magnetic metal film, outputs of the detector coils and a reference signal are respectively added in waveform adders when the exciting coil is energized by an exciting power source. Then, the outputs of the adders and the reference signal are respectively compared in phase in phase comparators, and the outputs of the comparators are respectively converted in voltage values. A differential amplifier amplifies a difference between the voltage values, and a torque detector detects direction and magnitude of the torque applied to the torque transmission shaft from polarity and magnitude of the difference voltage value, thereby enabling to accurately detect applied torque even when installed near noise-producing electrical equipment such as an electric power steering system.
摘要翻译： 在具有附着在转矩传递轴上的具有磁各向异性的磁性金属膜的扭矩传感器和分别安装在磁性金属膜附近的励磁线圈和一对检测线圈的情况下，分别添加检测线圈的输出和基准信号 励磁线圈由激励电源通电时的波形加法器。 然后，分别在相位比较器中分别比较加法器和参考信号的输出，并将比较器的输出分别转换成电压值。 差分放大器放大电压值之差，转矩检测器根据差动电压值的极性和大小来检测施加到转矩传递轴的扭矩的方向和幅度，从而即使在安装在噪声附近时也可以精确地检测施加的转矩 生产电力设备如电动助力转向系统。
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公开(公告)号：US07386930B2
公开(公告)日：2008-06-17
申请号：US11983085
申请日：2007-11-07
申请人： Yasuo Shimizu , Yoshito Nakamura , Shunichiro Sueyoshi , Nobuhiko Yoshimoto , Koji Kobayashi , Yuichi Fukuda , Mizuho Doi , Hitoshi Harada , Tomohiro Hoshi
发明人： Yasuo Shimizu , Yoshito Nakamura , Shunichiro Sueyoshi , Nobuhiko Yoshimoto , Koji Kobayashi , Yuichi Fukuda , Mizuho Doi , Hitoshi Harada , Tomohiro Hoshi
IPC分类号： H04R31/00
CPC分类号： G01L3/102 , G01L3/103 , Y10T29/49002 , Y10T29/49005 , Y10T29/4902 , Y10T29/49078 , Y10T29/49224
摘要： For forming an annular magnetostrictive coat on an outer peripheral surface of a rotational shaft associated with a magnetostrictive torque sensor, a magnetostrictive coat forming method comprises a step of fitting a cylindrical masking jig over the outer peripheral surface of the rotational shaft and securing the masking jig to the outer peripheral surface, a step of placing the rotational shaft in a plating tank to thereby form the magnetostrictive coat by plating on the outer peripheral surface, and a step of detaching the masking jig from the rotational shaft.
摘要翻译： 为了在与磁致伸缩扭矩传感器相关联的旋转轴的外周表面上形成环形磁致伸缩涂层，磁致伸缩涂层形成方法包括将圆柱形掩模夹具安装在旋转轴的外周表面上并固定掩模夹具 在外周面上设置将旋转轴配置在镀槽内，通过在外周面上电镀而形成磁致伸缩涂层的步骤，以及将掩模夹具与旋转轴分离的工序。
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公开(公告)号：US06959781B2
公开(公告)日：2005-11-01
申请号：US10757328
申请日：2004-01-13
摘要： A rotational torque detection mechanism is provided, which includes a rotational shaft whose first end portion reaches outside the mechanism, a magnetostrictive membrane which is disposed on a surface of the rotational shaft and varies its magnetic permeability according to an amount and direction of rotational torque acting on the rotational shaft, an excitation circuit which is disposed to confront the rotational shaft so as to excite the magnetostrictive membrane and a detection circuit which is disposed to confront the rotational shaft so as to electrically detect a change of the magnetic permeability of the magnetostrictive membrane. In the rotational detection mechanism, the first end portion is adapted to be a free end and a second end portion of the rotational shaft is rotatably supported.
摘要翻译： 本发明提供一种旋转力矩检测机构，其具有第一端部到达机构外部的旋转轴，设置在旋转轴的表面上的磁致伸缩膜，根据旋转力矩的作用量和方向，改变其磁导率 在旋转轴上设置有激励电路，其被设置为面对旋转轴以激励磁致伸缩膜;以及检测电路，其布置成面对旋转轴，以便电检测磁致伸缩膜的磁导率的变化 。 在旋转检测机构中，第一端部适于作为自由端，旋转轴的第二端部被可旋转地支撑。
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