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1. 发明授权

US07589313B2 Method and apparatus for absolute optical encoders with reduced sensitivity to scale or disk mounting errors 有权
标题翻译：绝对光学编码器的方法和设备，对刻度或磁盘安装误差的灵敏度降低
公开(公告)号：US07589313B2
公开(公告)日：2009-09-15
申请号：US10554027
申请日：2004-04-21
申请人： Mikael Nordenfelt , Mikael Hertzman , Staffan Palm , Magnus Westermark
发明人： Mikael Nordenfelt , Mikael Hertzman , Staffan Palm , Magnus Westermark
IPC分类号： G01D5/34
CPC分类号： G01D5/34707
摘要： An absolute optical encoder apparatus for measuring an absolute position comprises an optical disk or scale element (100) having both incremental and absolute code tracks formed thereon. In the embodiment, a photoemitter light source (110, 111) illuminates the tracks onto a CCD area array sensor (115, 116) such that an image is formed from a pixel matrix having of rows and columns. Two detector line rows (410, 420) of the pixel matrix are each read out from the portion of the matrix comprising the incremental and absolute code tracks respectively. Inaccurate mounting of the disk or scale element can cause fluctuations in the period of the code tracks resulting from the rotation of the disk or movement of the scale element. The mounting inaccuracies are compensated for either by matching the spatial frequency by dynamically changing row of detector line read from the incremental image of the code track or by altering the numerical value of the pattern period used in the Fourier phase algorithm. The absolute position is numerically calculated from the imaged code tracks.
摘要翻译：用于测量绝对位置的绝对光学编码器装置包括具有形成在其上的增量和绝对码轨道的光盘或刻度元件（100）。在本实施例中，光电发生器光源（110,111）将光道照射到CCD区域阵列传感器（115,116）上，使得图像由具有行和列的像素矩阵形成。像素矩阵的两个检测器行行（410,420）分别从包括增量和绝对代码轨道的矩阵的部分读出。磁盘或刻度元件的不准确的安装可能导致由于盘的旋转或刻度元件的移动而产生的代码轨迹的周期的波动。通过动态地改变从代码轨道的增量图像读取的检测器线的行或通过改变在傅立叶相位算法中使用的模式周期的数值来匹配空间频率来补偿安装不准确。绝对位置从成像的代码轨迹数值计算。

2. 发明申请

US20060243895A1 Method and apparatus for absolute optical encoders with reduced sensitivity to scale or disk mounting errors 有权
标题翻译：绝对光学编码器的方法和设备，对刻度或磁盘安装误差的灵敏度降低
公开(公告)号：US20060243895A1
公开(公告)日：2006-11-02
申请号：US10554027
申请日：2004-04-21
申请人： Mikael Nordenfelt , Mikael Hertzman , Staffan Palm , Magnus Westermark
发明人： Mikael Nordenfelt , Mikael Hertzman , Staffan Palm , Magnus Westermark
IPC分类号： G01D5/34
CPC分类号： G01D5/34707
摘要： An absolute optical encoder apparatus for measuring an absolute position comprises an optical disk or scale element (100) having both incremental and absolute code tracks formed thereon. In the embodiment, a photoemitter light source (110, 111) illuminates the tracks onto a CCD area array sensor (115, 116) such that an image is formed from a pixel matrix having of rows and columns. Two detector line rows (410, 420) of the pixel matrix are each read out from the portion of the matrix comprising the incremental and absolute code tracks respectively. Inaccurate mounting of the disk or scale element can cause fluctuations in the period of the code tracks resulting from the rotation of the disk or movement of the scale element. The mounting inaccuracies are compensated for either by matching the spatial frequency by dynamically changing row of detector line read from the incremental image of the code track or by altering the numerical value of the pattern period used in the Fourier phase algorithm. The absolute position is numerically calculated from the imaged code tracks.
摘要翻译：用于测量绝对位置的绝对光学编码器装置包括具有形成在其上的增量和绝对码轨道的光盘或刻度元件（100）。在本实施例中，光电发生器光源（110,111）将光道照射到CCD区域阵列传感器（115,116）上，使得图像由具有行和列的像素矩阵形成。像素矩阵的两个检测器行行（410,420）分别从包括增量和绝对代码轨道的矩阵的部分读出。磁盘或刻度元件的不准确的安装可能导致由于盘的旋转或刻度元件的移动而产生的代码轨迹的周期的波动。通过动态地改变从代码轨道的增量图像读取的检测器线的行或通过改变在傅立叶相位算法中使用的模式周期的数值来匹配空间频率来补偿安装不准确。绝对位置从成像的代码轨迹数值计算。

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