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1.发明申请Magnetostrictive torque sensor and electrically powered steering apparatus using same 失效磁致伸缩转矩传感器和使用其的电动转向装置公开(公告)号：US20070074589A1
公开(公告)日：2007-04-05
申请号：US11542142
申请日：2006-10-04
IPC分类号： G01L3/00
摘要： A magnetostrictive torque sensor comprising a first magnetostrictive film, a second magnetostrictive film, and a third magnetostrictive film formed over the entire circumferential periphery of a surface of a rotating shaft. A first sensor coil, a second sensor coil, and a third sensor coil for sensing changes in impedance are provided for the first, second, and third magnetostrictive films, respectively. Signals according to the changes in impedance outputted from the first through third sensor coils are inputted to a torque calculating unit. The torque calculating unit calculates the torque applied to the rotating shaft on the basis of the output signal from the first sensor coil and the output signal from the second sensor coil. Furthermore, the output signals from the first through third sensor coils are compared, and failures in the first magnetostrictive film or the second magnetostrictive film are detected by a failure detector.
摘要翻译： 一种磁致伸缩扭矩传感器，包括在旋转轴的表面的整个圆周周围形成的第一磁致伸缩膜，第二磁致伸缩膜和第三磁致伸缩膜。 分别为第一，第二和第三磁致伸缩膜提供第一传感器线圈，第二传感器线圈和用于感测阻抗变化的第三传感器线圈。 根据从第一至第三传感器线圈输出的阻抗的变化的信号被输入到转矩计算单元。 扭矩计算单元基于来自第一传感器线圈的输出信号和来自第二传感器线圈的输出信号来计算施加到旋转轴的扭矩。 此外，比较来自第一至第三传感器线圈的输出信号，并且通过故障检测器检测第一磁致伸缩膜或第二磁致伸缩膜中的故障。
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2.发明授权Magnetostrictive torque sensor and electrically powered steering apparatus using same 失效磁致伸缩转矩传感器和使用其的电动转向装置公开(公告)号：US07497132B2
公开(公告)日：2009-03-03
申请号：US11542142
申请日：2006-10-04
IPC分类号： G01L3/00
摘要： A magnetostrictive torque sensor comprising a first magnetostrictive film, a second magnetostrictive film, and a third magnetostrictive film formed over the entire circumferential periphery of a surface of a rotating shaft. A first sensor coil, a second sensor coil, and a third sensor coil for sensing changes in impedance are provided for the first, second, and third magnetostrictive films, respectively. Signals according to the changes in impedance outputted from the first through third sensor coils are inputted to a torque calculating unit. The torque calculating unit calculates the torque applied to the rotating shaft on the basis of the output signal from the first sensor coil and the output signal from the second sensor coil. Furthermore, the output signals from the first through third sensor coils are compared, and failures in the first magnetostrictive film or the second magnetostrictive film are detected by a failure detector.
摘要翻译： 一种磁致伸缩扭矩传感器，包括在旋转轴的表面的整个圆周周围形成的第一磁致伸缩膜，第二磁致伸缩膜和第三磁致伸缩膜。 分别为第一，第二和第三磁致伸缩膜提供第一传感器线圈，第二传感器线圈和用于感测阻抗变化的第三传感器线圈。 根据从第一至第三传感器线圈输出的阻抗的变化的信号被输入到转矩计算单元。 扭矩计算单元基于来自第一传感器线圈的输出信号和来自第二传感器线圈的输出信号来计算施加到旋转轴的扭矩。 此外，比较来自第一至第三传感器线圈的输出信号，并且通过故障检测器检测第一磁致伸缩膜或第二磁致伸缩膜中的故障。
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公开(公告)号：US20070089538A1
公开(公告)日：2007-04-26
申请号：US11540550
申请日：2006-10-02
IPC分类号： G01L3/00
摘要： A method for manufacturing a magnetostrictive torque sensor compriseis the steps of forming magnetostrictive films on a rotating shaft of a magneto-strictive torque sensor, creating magnetic anisotropy in the magnetostrictive films formed in the magnetostrictive film formation step, and demagnetizing the rotating shaft. The demagnetization step is provided in any of the stages after the magnetostrictive film formation step, and comprises initializing the remanent magnetism created in the rotating shaft.
摘要翻译： 用于制造磁致伸缩扭矩传感器的方法包括以下步骤：在磁致伸缩扭矩传感器的旋转轴上形成磁致伸缩膜，在磁致伸缩膜形成步骤中形成的磁致伸缩膜产生磁各向异性，并使旋转轴消磁。 在磁致伸缩膜形成步骤之后的任何阶段提供退磁步骤，并且包括初始化在旋转轴中产生的剩余磁性。
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公开(公告)号：US07661324B2
公开(公告)日：2010-02-16
申请号：US12143588
申请日：2008-06-20
申请人： Hitoshi Harata , Yuichi Fukuda , Yukiya Kashimura , Mizuho Doi
发明人： Hitoshi Harata , Yuichi Fukuda , Yukiya Kashimura , Mizuho Doi
IPC分类号： G01L3/00
摘要： This magnetostrictive torque sensor 10 includes a rotating shaft 11 used to rotate according to an input torque and provided with magnetostrictive films 14A and 14B, an excitation coil 12 configured to apply an alternating magnetic field 31 to the magnetostrictive film, and detection coils 13A and 13B each of which detects a change in the magnetic characteristic of an associated one of the magnetostrictive films. The magnetostrictive torque sensor is configured so that a bias magnetic field is added to the alternating magnetic field from a bias power supply 17 so as to satisfy the following conditions: Hm −Hin>−Hn where Hm (>0) is an applied magnetic field corresponding to a maximum magnetic permeability obtained according to a magnetic hysteresis curve 34 of the magnetostrictive film, which shows magnetization caused by the alternating magnetic field, Hn (>0) is an applied magnetic field corresponding to an end of a range in which a discontinuous magnetization is performed, and Hin (>0) is an applied magnetic field that determines a sensitivity range to be set on a magnetostrictive sensitivity curve representing a magnetostrictive sensitivity exhibited by the magnetostrictive film.
摘要翻译： 该磁致伸缩转矩传感器10包括用于根据输入转矩旋转并设置有磁致伸缩膜14A和14B的旋转轴11，被配置为向磁致伸缩膜施加交变磁场31的励磁线圈12以及检测线圈13A和13B 其中的每一个检测相关联的一个磁致伸缩膜的磁特性的变化。 磁致伸缩扭矩传感器被构造成使得偏置磁场从偏置电源17添加到交变磁场，以满足以下条件：Hm -Hm> -Hin> -Hn其中Hm（> 0）是 对应于根据磁致伸缩膜的磁滞曲线34获得的最大磁导率的施加磁场，其显示由交变磁场引起的磁化，Hn（> 0）是对应于范围的末端的施加磁场 其中执行不连续磁化，并且Hin（> 0）是施加的磁场，其确定将在由磁致伸缩膜表现的磁致伸缩灵敏度表示的磁致伸缩灵敏度曲线上设定的灵敏度范围。
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公开(公告)号：US07562432B2
公开(公告)日：2009-07-21
申请号：US11582971
申请日：2006-10-19
IPC分类号： G01R31/28 , H01C17/28 , H01F7/06 , H01F1/00 , H01F21/06 , G11B5/127 , G11B5/33 , H04R31/00 , G01L3/00
CPC分类号： G01L3/102 , G01L3/103 , G01L3/105 , Y10T29/49004 , Y10T29/4902 , Y10T29/4906 , Y10T29/49073 , Y10T29/49075 , Y10T29/49103
摘要： A method for manufacturing a magnetostrictive torque sensor having low nonuniformity of sensitivity characteristics. The residual austenite content in the rotating shaft of the torque sensor is measured first. A magnetic film is subsequently subjected to a heat treatment under heat treatment conditions that are different for each of the measured residual austenite contents, and magnetic anisotropy is imparted.
摘要翻译： 一种具有低灵敏度特性不均匀性的磁致伸缩扭矩传感器的制造方法。 首先测量扭矩传感器的旋转轴中的残余奥氏体含量。 随后在对每个测量的残余奥氏体含量不同的热处理条件下对磁性膜进行热处理，并赋予磁各向异性。
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6.发明申请Magnetostrictive torque sensor and electrically powered steering apparatus using same 有权磁致伸缩转矩传感器和使用其的电动转向装置公开(公告)号：US20070074588A1
公开(公告)日：2007-04-05
申请号：US11542150
申请日：2006-10-04
IPC分类号： G01L3/00
CPC分类号： H01L41/125 , G01L3/102 , G01L3/105
摘要： A magnetostrictive torque sensor includes a rotating shaft that is rotated by an applied torque, magnetostrictive films formed around the entire circumferential periphery of a surface of the rotating shaft in at least one location, sensor coils for sensing a change in impedance of the magnetostrictive films, and a torque calculation unit for calculating the torque applied to the rotating shaft on the basis of a signal relating to the change in impedance outputted from the sensor coils. In this magnetostrictive torque sensor, a width of the magnetostrictive films in the axial direction of the rotating shaft and a width of the sensor coils in the axial direction of the rotating shaft are set so as to fulfill the relationship 1
摘要翻译： 磁致伸缩扭矩传感器包括旋转轴，所述旋转轴通过施加的转矩旋转，在至少一个位置围绕旋转轴的表面的整个圆周周围形成的磁致伸缩膜，用于感测磁致伸缩膜的阻抗变化的传感器线圈， 以及扭矩计算单元，用于基于与从传感器线圈输出的阻抗变化相关的信号来计算施加到旋转轴的扭矩。 在该磁致伸缩转矩传感器中，设定旋转轴的轴向的磁致伸缩膜的宽度和旋转轴的轴向的传感器线圈的宽度，以满足1 <（W 1 / W 2）<1.35。
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7.发明授权Magnetostrictive torque sensor and electrically powered steering apparatus using same 有权磁致伸缩转矩传感器和使用其的电动转向装置公开(公告)号：US07540204B2
公开(公告)日：2009-06-02
申请号：US11542150
申请日：2006-10-04
IPC分类号： G01L3/02
CPC分类号： H01L41/125 , G01L3/102 , G01L3/105
摘要： A magnetostrictive torque sensor includes a rotating shaft that is rotated by an applied torque, magnetostrictive films formed around the entire circumferential periphery of a surface of the rotating shaft in at least one location, sensor coils for sensing a change in impedance of the magnetostrictive films, and a torque calculation unit for calculating the torque applied to the rotating shaft on the basis of a signal relating to the change in impedance outputted from the sensor coils. In this magnetostrictive torque sensor, a width of the magnetostrictive films in the axial direction of the rotating shaft and a width of the sensor coils in the axial direction of the rotating shaft are set so as to fulfill the relationship 1
摘要翻译： 磁致伸缩扭矩传感器包括旋转轴，所述旋转轴通过施加的转矩旋转，在至少一个位置围绕旋转轴的表面的整个圆周周围形成的磁致伸缩膜，用于感测磁致伸缩膜的阻抗变化的传感器线圈， 以及扭矩计算单元，用于基于与从传感器线圈输出的阻抗变化相关的信号来计算施加到旋转轴的扭矩。 在该磁致伸缩扭矩传感器中，设定旋转轴的轴向的磁致伸缩膜的宽度和旋转轴的轴向的传感器线圈的宽度，以满足关系1 <（W1 / W2） <1.35。
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公开(公告)号：US20070089287A1
公开(公告)日：2007-04-26
申请号：US11582971
申请日：2006-10-19
IPC分类号： G01R31/28
CPC分类号： G01L3/102 , G01L3/103 , G01L3/105 , Y10T29/49004 , Y10T29/4902 , Y10T29/4906 , Y10T29/49073 , Y10T29/49075 , Y10T29/49103
摘要： A method for manufacturing a magnetostrictive torque sensor having low nonuniformity of sensitivity characteristics. The residual austenite content in the rotating shaft of the torque sensor is measured first. A magnetic film is subsequently subjected to a heat treatment under heat treatment conditions that are different for each of the measured residual austenite contents, and magnetic anisotropy is imparted.
摘要翻译： 一种具有低灵敏度特性不均匀性的磁致伸缩扭矩传感器的制造方法。 首先测量扭矩传感器的旋转轴中的残余奥氏体含量。 随后在对每个测量的残余奥氏体含量不同的热处理条件下对磁性膜进行热处理，并赋予磁各向异性。
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9.发明申请MAGNESTOSTRICTIVE TORQUE SENSOR AND MANUFACTURING METHOD THEREOF, AND ELECTRIC POWER STEERING SYSTEM 失效MAGNESTOSTRICTIVE TORQUE传感器及其制造方法及电力转向系统公开(公告)号：US20110067947A1
公开(公告)日：2011-03-24
申请号：US12919995
申请日：2009-02-26
CPC分类号： G01L3/102 , B62D6/10 , G01L3/103 , G01L3/105 , Y10T29/49007 , Y10T29/4902
摘要： A magnestostrictive torque sensor 10 detects rotating torque applied to a rod-shaped rotating shaft 11 to work around the rotating shaft based on a change in magnetic characteristics of a magnetostrictive film formed on a surface the rotating shaft so as to extend around a full circumference thereof in a circumferential direction. The magnetostrictive film 14 is formed continuously in an axial direction at a portion on the rotating shaft in the axial direction thereof. The magnetostrictive film 14 has on the continuously formed area a first magnetostrictive film portion 14A and a second magnetostrictive film portion 14B having magnetic anisotropies which are opposite to each other and a third magnetostrictive film portion 14C which is formed between the first and second magnetostrictive film portions. A first detection coil 13A, a second detection coil 13B and a third detection coil 13C are provided for the first magnetostrictive film portion, the second magnetostrictive film portion and the third magnetostrictive film portion, respectively.
摘要翻译： 磁致伸缩扭矩传感器10基于在旋转轴的表面上形成的磁致伸缩膜的磁特性的变化来检测施加到杆状旋转轴11的旋转扭矩，以绕其旋转轴工作，以围绕其整个圆周延伸 在圆周方向。 磁致伸缩膜14沿轴向连续地形成在旋转轴的轴向部分上。 磁致伸缩膜14在连续形成区域上具有第一磁致伸缩膜部分14A和具有彼此相对的磁各向异性的第二磁致伸缩膜部分14B和形成在第一和第二磁致伸缩膜部分之间的第三磁致伸缩膜部分14C 。 分别为第一磁致伸缩膜部分，第二磁致伸缩膜部分和第三磁致伸缩膜部分提供第一检测线圈13A，第二检测线圈13B和第三检测线圈13C。
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10.发明授权Magnestostrictive torque sensor and manufacturing method thereof, and electric power steering system 失效扭矩传感器及其制造方法以及电动助力转向系统公开(公告)号：US08181538B2
公开(公告)日：2012-05-22
申请号：US12919995
申请日：2009-02-26
CPC分类号： G01L3/102 , B62D6/10 , G01L3/103 , G01L3/105 , Y10T29/49007 , Y10T29/4902
摘要： A magnestostrictive torque sensor detects rotating torque applied to a rod-shaped rotating shaft to work around the rotating shaft based on a change in magnetic characteristics of a magnetostrictive film formed on a surface the rotating shaft so as to extend around a full circumference thereof in a circumferential direction. The magnetostrictive film is formed continuously in an axial direction at a portion on the rotating shaft in the axial direction thereof. The magnetostrictive film has on the continuously formed area a first magnetostrictive film portion and a second magnetostrictive film portion having magnetic anisotropies which are opposite to each other and a third magnetostrictive film portion which is formed between the first and second magnetostrictive film portions. A first detection coil, a second detection coil and a third detection coil are provided for the first magnetostrictive film portion, the second magnetostrictive film portion and the third magnetostrictive film portion, respectively.
摘要翻译： 磁致伸缩扭矩传感器检测施加到杆状旋转轴的旋转扭矩，以便基于旋转轴的表面上形成的磁致伸缩膜的磁特性的变化，绕其旋转轴工作，从而绕其旋转轴的全周延伸 圆周方向。 磁致伸缩膜在轴向的旋转轴的一部分沿轴向连续形成。 磁致伸缩膜在连续形成区域上具有第一磁致伸缩膜部分和具有彼此相对的磁各向异性的第二磁致伸缩膜部分和形成在第一和第二磁致伸缩膜部分之间的第三磁致伸缩膜部分。 分别为第一磁致伸缩膜部分，第二磁致伸缩膜部分和第三磁致伸缩膜部分提供第一检测线圈，第二检测线圈和第三检测线圈。
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