公开(公告)号：EP0420136B1

公开(公告)日：1993-03-17

申请号：EP90118370.7

申请日：1990-09-25

申请人： Kubota Corporation

发明人： Ishino, Renshiro, c/o Kubota Corporation ,  Shibata, Yoshio, c/o Kubota Corporation

IPC分类号： G01L3/10 ,  H01L41/12

CPC分类号： G01L3/102 ,  G01L3/103 ,  G01L3/105 ,  H01L41/125

公开(公告)号：EP0420136A1

公开(公告)日：1991-04-03

申请号：EP90118370.7

申请日：1990-09-25

申请人： Kubota Corporation

发明人： Ishino, Renshiro, c/o Kubota Corporation ,  Shibata, Yoshio, c/o Kubota Corporation

IPC分类号： G01L3/10 ,  H01L41/12

CPC分类号： G01L3/102 ,  G01L3/103 ,  G01L3/105 ,  H01L41/125

摘要： The invention relates to a method of producing magnetostriction type torque sensor shafts adapted to detect a change in permeability when a torque is applied. A plurality of times of shot peening are applied to the surface of a torque sensor shaft in such a manner that the diameter of shot particles to be used is decreased each time. This arrangement ensures that the region in which the residual stress is at a maximum and approximately lies over a wide range as seen in the direction of the depth from the outermost surface of the shaft and extends from a deep area to an area close to the surface of the shaft. As a result, the hysteresis and nonlinearity of the shaft are improved and it becomes possible to use a wide range of excitation conditions.

摘要翻译： 本发明涉及一种制造磁致伸缩型转矩传感器轴的方法，该轴适用于在施加转矩时检测磁导率的变化。 将多次喷丸硬化施加到转矩传感器轴的表面，使得每次使用的喷丸粒径都减小。 这种布置确保了残留应力处于最大值的区域，并且大致位于从轴的最外表面的深度方向看到的宽范围内，并且从深部区域延伸到靠近表面的区域 的轴。 结果，提高了轴的滞后和非线性，并且可以使用宽范围的激励条件。