公开(公告)号：US06595073B1

公开(公告)日：2003-07-22

申请号：US09512804

申请日：2000-02-25

申请人： Wataru Yagi ,  Kouta Maruyama ,  Atsunao Itoh ,  Yoshio Kato

发明人： Wataru Yagi ,  Kouta Maruyama ,  Atsunao Itoh ,  Yoshio Kato

IPC分类号： G01L314

CPC分类号： G01L3/102 ,  G01L3/103 ,  G01L3/105 ,  Y10T29/49004

摘要： A magnetostrictive device for a torque sensor which has a high sensor sensitivity whether the excitation frequency is in a high frequency range or in a low frequency range and can withstand excess load torques well, and also a method of easily manufacturing the device. In manufacturing the magnetostrictive device 1 for a torque sensor, which has a magnetic anisotropic portion 15 formed on the surface of a shaft body 10 thereof, the method of forming the magnetic anisotropic portion 15 comprises the steps of: forming spiral grooves in the surface of the shaft body 10 to form a plurality of troughs 16 and ridges 17 alternately; and directly applying a compressive stress only to the ridges 17 to cause deformations accompanied by plastic flow and to provide an almost planar plateau portion 171 at a crest portion of each of the ridges 17.

摘要翻译： 一种用于扭矩传感器的磁致伸缩装置，无论激发频率是在高频范围还是在低频范围内，传感器灵敏度高，能够很好地承受过多的负载转矩，还有一种易于制造该装置的方法。 在制造具有形成在其轴体10的表面上的磁各向异性部分15的扭矩传感器的磁致伸缩装置1中，形成磁各向异性部分15的方法包括以下步骤：在 轴体10交替地形成多个槽16和脊17; 并且仅将压缩应力仅直接施加到脊部17以引起伴随塑性流动的变形，并且在每个脊部17的波峰部分处提供几乎平坦的平台部分171。