公开(公告)号：US20110210238A1

公开(公告)日：2011-09-01

申请号：US12983568

申请日：2011-01-03

申请人： Min-ha AN ,  Hyong-su CHOI ,  Tae-young LEE ,  Dong-ju SEOK

发明人： Min-ha AN ,  Hyong-su CHOI ,  Tae-young LEE ,  Dong-ju SEOK

IPC分类号： G01D5/347 ,  G01D5/36

CPC分类号： G01D5/3473

摘要： An encoder which measures displacement of a moving part includes a light-emitting unit; a moving part which moves relative to the light-emitting unit; a first pattern track which includes a plurality of first unit patterns sequentially formed on the moving part, separated from one another and having different widths; a first light-receiving unit which is disposed to correspond to the light-emitting unit and detects first information light received from the light-emitting unit via a first pattern of the first unit patterns; at least one second light-receiving unit which is disposed to correspond to the light-emitting unit and detects second information about light received from the light-emitting unit via at least one second pattern of the first unit patterns; and a displacement calculating unit which calculates a relative displacement of the moving part with respect to a reference position based on the first and second information.

摘要翻译： 测量移动部件的位移的编码器包括：发光单元; 相对于发光单元移动的移动部件; 第一图案轨迹，其包括顺序地形成在所述移动部分上的彼此分离并且具有不同宽度的多个第一单位图案; 第一光接收单元，其设置成对应于所述发光单元，并经由所述第一单元图案的第一图案检测从所述发光单元接收的第一信息光; 至少一个第二光接收单元，其设置成对应于所述发光单元，并且经由所述第一单元图案的至少一个第二图案检测关于从所述发光单元接收的光的第二信息; 以及位移计算单元，其基于所述第一信息和所述第二信息来计算所述移动部件相对于基准位置的相对位移。