公开(公告)号：US10914612B2

公开(公告)日：2021-02-09

申请号：US16247800

申请日：2019-01-15

申请人： FARO Technologies, Inc.

发明人： William E. Schoenfeldt ,  Jeremy Mares

IPC分类号： G01D5/245 ,  G01D5/347 ,  G01D5/38 ,  G01D5/244

摘要： Optical encoders and methods of determining rotational movement are provided. The optical encoders include an encoder disk having a patterned signal track comprising a plurality of optically detectable elements disposed on a periphery of the encoder disk, wherein each optically detectable element is associated with a bit in a binary sequence, wherein each bit has a predefined bit depth, a boundary dividing the patterned signal track into at least two sub-regions, wherein each sub-region comprises a subset of the optically detectable elements, at least one sensor arranged to detect an optical signal associated with at least one optically detectable element, and a controller in communication with the at least one sensor, the controller configured to determine an angular position of the encoder disk, wherein the controller determines the angular position based on a detected binary sequence, a detected sub-region, and a look-up-table.

公开(公告)号：US20190234770A1

公开(公告)日：2019-08-01

申请号：US16247800

申请日：2019-01-15

申请人： FARO Technologies, Inc.

发明人： William E. Schoenfeldt ,  Jeremy Mares

IPC分类号： G01D5/245 ,  G01D5/244 ,  G01D5/347

CPC分类号： G01D5/2457 ,  G01D5/24476 ,  G01D5/34715 ,  G01D5/3473 ,  G01D5/34792 ,  G01D5/38

摘要： Optical encoders and methods of determining rotational movement are provided. The optical encoders include an encoder disk having a patterned signal track comprising a plurality of optically detectable elements disposed on a periphery of the encoder disk, wherein each optically detectable element is associated with a bit in a binary sequence, wherein each bit has a predefined bit depth, a boundary dividing the patterned signal track into at least two sub-regions, wherein each sub-region comprises a subset of the optically detectable elements, at least one sensor arranged to detect an optical signal associated with at least one optically detectable element, and a controller in communication with the at least one sensor, the controller configured to determine an angular position of the encoder disk, wherein the controller determines the angular position based on a detected binary sequence, a detected sub-region, and a look-up-table.