公开(公告)号：US20050116153A1

公开(公告)日：2005-06-02

申请号：US10725696

申请日：2003-12-01

申请人： Toshiya Hataguchi ,  Yee Chin ,  Kok Fo ,  Srinivasan Lakshmanan ,  Lai Chua

发明人： Toshiya Hataguchi ,  Yee Chin ,  Kok Fo ,  Srinivasan Lakshmanan ,  Lai Chua

IPC分类号： G01D5/36 ,  G01D5/347 ,  G01D5/34

CPC分类号： G01D5/3473 ,  G01D5/34707

摘要： An encoder for measuring the position of a rotating shaft is disclosed. The encoder includes a drum having an encoding track thereon and a detector module having a light source and a photodetector. The drum includes a cylindrical surface characterized by an axis, the drum having a surface with a normal perpendicular to the axis. The encoding track includes a plurality of alternating reflective and non-reflective stripes arranged on the cylindrical surface. The first light source illuminates the stripes at an opaque angle relative to the normal. The first photodetector is positioned to receive light from the light source that is reflected from the reflective stripes when the drum moves relative to the photodetector. In one embodiment, the drum rotates about the axis when the shaft rotates. The encoding track can be either on the inside or outside of the drum.

摘要翻译： 公开了一种用于测量旋转轴的位置的编码器。 编码器包括其上具有编码轨道的滚筒和具有光源和光电检测器的检测器模块。 滚筒包括由轴线表征的圆柱形表面，滚筒具有垂直于轴线的法线。 编码轨道包括布置在圆柱形表面上的多个交替反射和非反射条纹。 第一光源相对于法线以不透明的角度照亮条纹。 第一光电检测器定位成当滚筒相对于光电检测器移动时接收来自反射条纹的光源的光。 在一个实施例中，当轴旋转时，滚筒绕轴线旋转。 编码轨道可以在鼓的内部或外部。