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1.发明授权
公开(公告)号：US4920809A
公开(公告)日：1990-05-01
申请号：US260990
申请日：1988-10-21
IPC分类号： G01L3/10
摘要： A device for measuring torque in a shaft without contacting the latter. A torque transmitting shaft is formed with at least one detecting magnetically anisotropic region inclined to form an angle with respect to the axis of rotation of this shaft. A detecting coil is disposed on the periphery of the detecting magnetically anisotropic region. When the detecting voltage for the detecting coil changes owing to temperature changes and time-dependent changes, the changes in the detection sensitivity and in the zero point take place, leading to errors during torque measurement. Correct measured values can be obtained by having a device for correcting such changes in sensitivity and zero point.
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公开(公告)号：US4619147A
公开(公告)日：1986-10-28
申请号：US648894
申请日：1984-09-10
CPC分类号： G01L1/2243 , G01G3/1408 , G01G3/1412 , G01L1/2218
摘要： A load cell (24, 31, 40, 51, 58, 62, 64, 68, 92, 96, 97) having flame proof function has a load cell body (2) and a flame proof enclosure (25, 33, 36, 41, 69, 78) for covering at least a strain gage carrying portion (5) of the load cell body (2). A load receiving portion (4) connected with the strain gage carrying portion (5) for transmitting a load to the strain gage carrying portion, projects outwardly from the flame proof enclosure. A gap (30) is defined between a first surface of the load cell body and a second surface of the enclosure, so that the load receiving portion (4) and the strain gage carrying portion (5) are freely movable relative to the enclosure. The size of the gap width W.sub.1 and of the gap length L.sub.1 are selected for realizing the flame proof function.
摘要翻译： 具有防火功能的测力传感器（24,31,40,51,58,62,64,68,92,96,97）具有称重传感器本体（2）和防火外壳（25,33,36， 41，69,78），用于覆盖所述测力传感体（2）的至少一个应变计承载部分（5）。 与用于将负载传送到应变计承载部分的应变计承载部分（5）连接的负载接收部分（4）从防火外壳向外突出。 在负载传感器主体的第一表面和外壳的第二表面之间限定间隙（30），使得负载接收部分（4）和应变计承载部分（5）能够相对于外壳自由移动。 为了实现防火功能，选择间隙宽度W1和间隙长度L1的大小。
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公开(公告)号：US4972726A
公开(公告)日：1990-11-27
申请号：US439343
申请日：1989-11-20
IPC分类号： G01L3/10
摘要： A device for measuring torque in a shaft without contacting the latter. A torque transmitting shaft is formed with at least one detecting magnetically anisotropic region inclined to form an angle with respect to the axis of rotation of this shaft. A detecting coil is disposed on the periphery of the detecting magnetically anisotropic region. When the detecting voltage for the detecting coil changes owing to temperature changes and time-dependent changes, the changes in the detection sensitivity and in the zero point take place, leading to errors during torque measurement. Correct measured values can be obtained by having a device for correcting such changes in sensitivity and zero point.
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公开(公告)号：US4972727A
公开(公告)日：1990-11-27
申请号：US439344
申请日：1989-11-20
IPC分类号： G01L3/10
摘要： A device for measuring torque in a shaft without contacting the latter. A torque transmitting shaft is formed with at least one detecting magnetically anisotropic region inclined to form an angle with respect to the axis of rotation of this shaft. A detecting coil is disposed on the periphery of the detecting magnetically anisotropic region. When the detecting voltage for the detecting coil changes owing to temperature changes and time-dependent changes, the changes in the detection sensitivity and in the zero point take place, leading to errors during torque measurement. Correct measured values can be obtained by having a device for correcting such changes in sensitivity and zero point.
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公开(公告)号：US5186059A
公开(公告)日：1993-02-16
申请号：US640685
申请日：1991-01-14
IPC分类号： G01L3/10
摘要： A torque sensor shaft for a non-contacting torque sensor including magnetically anisotropic portions formed on the surface of the shaft. Absolute value of angle of inclination of the anisotropic directions of the magnetically anisotropic portions is set lower than 40 degree so as to permit reduction of stress components in the anisotropic directions from their level in the case where the absolute value of the angle is 45 degree. By such angle setting it is possible to prevent possible decrease in sensor sensitivity and, in addition, to obtain good improvement in the point of magnetic saturation due to torque applied, thereby to obtain an improved dynamic range.
摘要翻译： 一种用于非接触转矩传感器的转矩传感器轴，包括形成在轴的表面上的磁各向异性部分。 磁各向异性部分的各向异性方向的倾斜角的绝对值设定为低于40度，从而允许在角度的绝对值为45度的情况下从各向异性方向的应力分量减小。 通过这样的角度设定，可以防止传感器灵敏度的可能降低，并且另外由于施加扭矩而获得对磁饱和点的良好改善，从而获得改善的动态范围。
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公开(公告)号：US4972728A
公开(公告)日：1990-11-27
申请号：US439347
申请日：1989-11-20
IPC分类号： G01L3/10
摘要： A device for measuring torque in a shaft without contacting the latter. A torque transmitting shaft is formed with at least one detecting magnetically anisotropic region inclined to form an angle with respect to the axis of rotation of this shaft. A detecting coil is disposed on the periphery of the detecting magnetically anisotropic region. When the detecting voltage for the detecting coil changes owing to temperature changes and time-dependent changes, the changes in the detection sensitivity and in the zero point take place, leading to errors during torque measurement. Correct measured values can be obtained by having a device for correcting such changes in sensitivity and zero point.
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公开(公告)号：US4933580A
公开(公告)日：1990-06-12
申请号：US361947
申请日：1989-06-05
CPC分类号： H01L41/125 , G01L3/102 , G01L3/103 , G01L3/105 , Y10S73/02
摘要： A magneto-strictive torque sensor for electrically contactlessly detecting a torque applied to a rotary shaft on the basis of a resulting change in the magnetic permeability of the surface of the shaft. Fine dents and retainer areas for retaining residual compressive stress due to the fine dents are formed on the surface of the rotary shaft. According to this arrangement, the process of magnetization resulting from the application of an exciting magnetic field and of the torque to the rotary shaft involves less magnetization due to magnetic domain wall displacement and consists principally of reversible magnetic rotation, with the result of reduced hysteresis in the magnetization process. The reduced hysteresis causes less hysteresis involved in torque detection and higher detection sensitivity, thus resulting in high accuracy of torque detection. Further, by working the surface of the rotary shaft for the purpose of forming the fine dents thereon, microdefects present on the surface layer of the rotary shaft are reduced or eliminated and thus reduced hysteresis and improved sensitivity can be attained in the process of torque detection.
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