公开(公告)号：US4887471A

公开(公告)日：1989-12-19

申请号：US230995

申请日：1988-08-11

申请人： Pavel Kolavcic ,  Jarl Sobel ,  Lars rnholmer

发明人： Pavel Kolavcic ,  Jarl Sobel ,  Lars rnholmer

IPC分类号： G01D3/036 ,  G01L1/12

CPC分类号： G01D3/0365 ,  G01L1/125 ,  G01L1/127 ,  Y10S73/02

摘要： A magnetoelastic force transducer which is compensated for sensitivity drift is provided with a measuring transducer and a reference transducer (1) of the same material. In its simplest form the reference transducer may consist of a toroid. The two transducers are arranged in good thermal contact with one another. The reference transducer is arranged with a winding (2) for excitation with a current which at each moment is proportional to the supply current of the measuring transducer, and with a winding (3) for delivering a reference signal (U.sub.r) proportional to its magnetic flux. The output signal of the reference transducer is rectified in a phase-sensitive rectifier, the output signal of which is compared with a constant reference voltage. The deviation controls the phase position of the control voltage of the rectifier in such a way that the output signal of the rectifier is caused to correspond to the reference voltage. The output signal of the measuring transducer is rectrified in a phase-sensitive rectifier, which is controlled by said control voltage and the output signal of which constitutes the temperature-compensated measured signal.

摘要翻译： 补偿灵敏度漂移的磁弹性力传感器具有相同材料的测量传感器和参考传感器（1）。 在其最简单的形式中，参考换能器可由环形线构成。 两个换能器彼此热接触地布置良好。 参考传感器布置有用于激励的绕组（2），其中电流在每个时刻与测量换能器的电源电流成比例，并且具有用于传递与其磁性成比例的参考信号（Ur）的绕组（3） 助焊剂 参考传感器的输出信号在相敏整流器中整流，其输出信号与恒定参考电压进行比较。 偏差控制整流器的控制电压的相位位置，使整流器的输出信号与参考电压相对应。 测量传感器的输出信号在相敏整流器中进行了整流，由相应的控制电压控制，其输出信号构成温度补偿测量信号。

公开(公告)号：US4823621A

公开(公告)日：1989-04-25

申请号：US188204

申请日：1988-04-29

申请人： Jarl Sobel ,  Lars rnholmer

发明人： Jarl Sobel ,  Lars rnholmer

IPC分类号： G01L1/12

CPC分类号： G01L1/127 ,  G01L1/125 ,  Y10S73/02

摘要： A magnetoelastic force transducer comprising two identical, cylindrical bodies defining a hollow magnetic core and held together by means of a force-transmitting stud bolt has its measuring and excitation windings located in the core. The interior of the core is constructed such that a thin cylindrical tubular wall is formed opposite to a respective measuring winding in each one of the bodies, whereby when the core is force-loaded via the stud bolt a compressive stress arises in one of these tubular walls and a tensile stress arises in the other. To eliminate a possible measurement signal at zero applied force a magnetically asymmetric center pole in the form of a punched disk of a soft-magnetic material and having the same diameter as the core and having a foil of a similar material secured on one side is located between the bodies. The hickness of the foil determines the magnitude of the signal adjustment.

公开(公告)号：US5394756A

公开(公告)日：1995-03-07

申请号：US051876

申请日：1993-04-26

申请人： Par Gustafsson ,  Jan O. Nordvall ,  Lars rnholmer

发明人： Par Gustafsson ,  Jan O. Nordvall ,  Lars rnholmer

IPC分类号： G01L1/00 ,  G01L1/12 ,  G01L5/16

CPC分类号： G01L1/127 ,  G01L1/125 ,  Y10S73/02

摘要： A puck for a three-dimensional magnetoelastic force transducer, with a cylindrically-shaped body having a circular cross-section, a semi-spherically-shaped first end surface and a second end surface having an annular flange with an outer diameter corresponding to the diameter of the circular cross section of the body; the body comprising a substantially solid magnetoelastic material with a center axis extending between the middle of the first and second bottom surfaces; the body having at least three force-measuring zones equidistantly spaced from the center axis and symmetrically distributed within the body; each of the at least three force-measuring zones having respective holes for receiving excitation and measuring windings; and force transmission paths extending between the intersection of the center axis and the first end surface, the intersection forming a point of application of force to the force transducer, and each of the at least three force-measuring zones to the annular flange.

摘要翻译： 一种用于三维磁弹力传感器的圆盘，具有圆形横截面的圆柱形主体，半球形的第一端面和具有环形凸缘的第二端面，所述环形凸缘的外径对应于直径 的身体的圆形横截面; 所述主体包括基本上为固体的磁弹性材料，其中心轴线在所述第一和第二底表面的中间延伸; 所述主体具有至少三个与所述中心轴线等距离并且对称地分布在所述主体内的力测量区域; 所述至少三个力测量区域中的每一个具有用于接收激励和测量绕组的相应孔; 以及在所述中心轴线和所述第一端面的相交处之间延伸的力传递路径，所述交点形成对所述力传感器施加力的点，以及所述至少三个力测量区域中的每一个到所述环形凸缘。