公开(公告)号：EP1019668A2

公开(公告)日：2000-07-19

申请号：EP98921364.0

申请日：1998-05-15

申请人： Ibsen Micro Structures A/S ,  FORSKNINGSCENTER RISO

发明人： ROSE, Bjarke ,  IMAM, Gulam, Husain ,  HANSON, Vagn, Steen, Grüner

IPC分类号： G01B7/30

CPC分类号： G01L3/12 ,  G01B11/162

摘要： A method and apparatus for determining angular displacement of one or more parts of an object (10) comprising detecting in at least one first image sensor first and second one or more distributions of Fourier-transformed speckles before and after angular displacement, respectively, and determining the displacement of the detected images; a method and apparatus for determining twist of a rotating shaft between two or more parts of the shaft subjected to a load; a method and apparatus for simultaneously determining angular displacements and surface translations of one or more parts of an object; and a method of determining the radius of angular displacement of one or more parts of an object.

公开(公告)号：EP1019668B1

公开(公告)日：2002-07-31

申请号：EP98921364.0

申请日：1998-05-15

申请人： FORSKNINGSCENTER RISO

发明人： ROSE, Bjarke ,  IMAM, Gulam, Husain ,  HANSON, Vagn, Steen, Grüner

IPC分类号： G01B7/30 ,  G01B11/16

CPC分类号： G01L3/12 ,  G01B11/162

公开(公告)号：EP1476717A1

公开(公告)日：2004-11-17

申请号：EP03706326.0

申请日：2003-02-13

申请人： Forskningscenter Riso

发明人： HANSON, Steen ,  ROSE, Bjarke ,  JAKOBSEN, Michael, Linde

IPC分类号： G01B11/16 ,  G01B9/02

CPC分类号： G01B11/002 ,  G01P3/36

摘要： The present invention relates to a compact and inexpensive optical displacement sensor that does not require accurate control of the distance to the object. A repetitive optical structure is utilized for formation of a repetitive optical signal emitted by an illuminated moving object. The repetitive optical structure is illuminated by the light source for formation of a fringe pattern (similar to Laser Doppler Anemometry), and/or, an object is illuminated by the light source and the repetitive optical structure diverts light from the illuminated object onto light sensors. A speckle pattern is formed on the object by the illumination. The speckle pattern moves with movement of the object, and speckle pattern movement is determined without a need for imaging the object onto the repetitive optical structure. Since the speckle pattern is not imaged onto the optical member, the distance and possible distance changes between the object and the optical member substantially do not affect system performance.

摘要翻译： 本发明涉及一种紧凑且便宜的光学位移传感器，其不需要精确控制到物体的距离。 利用重复的光学结构来形成由照亮的移动物体发射的重复的光学信号。 重复光学结构由光源照射以形成条纹图案（类似于激光多普勒测速仪），和/或物体由光源照射，并且重复光学结构将来自照明物体的光转向到光传感器 。 通过照明在物体上形成散斑图案。 斑点图案随着物体的运动而移动，并且散斑图案运动被确定而无需将物体成像到重复光学结构上。 由于斑点图案没有成像到光学构件上，所以物体和光学构件之间的距离和可能的距离变化基本不影响系统性能。