公开(公告)号：US08227744B2

公开(公告)日：2012-07-24

申请号：US12423297

申请日：2009-04-14

申请人： Kouhei Kusano ,  Kouji Morimoto

发明人： Kouhei Kusano ,  Kouji Morimoto

IPC分类号： G01D5/34

CPC分类号： G01D5/34746 ,  G01D5/34776

摘要： An absolute position length measurement type encoder includes: a scale which has an ABS pattern based on a pseudorandom code and forms bright and dark patterns by the ABS pattern; a light-receiving element for receiving the bright and dark patterns; a binarization circuit for dividing a digital signal in accordance with a signal output from the light-receiving element into a mode having high brightness and a mode having lower brightness, carrying out a binarization process by a threshold value where dispersion with regard to the two modes is maximized, and decoding the pseudorandom code by the unit of minimum line width of the ABS pattern from the binarized values; and a position detection circuit for calculating the absolute position of the scale with respect to the light-receiving element by acquiring the correlation between the decoded pseudorandom code and the design value of the pseudorandom code. Thereby, binarization errors of signals produced by the ABS pattern can be reduced, and highly accurate and stabilized measurement of an absolute position is carried out.

摘要翻译： 绝对位置长度测量型编码器包括：具有基于伪随机码的ABS图案并通过ABS图案形成明暗图案的刻度; 用于接收明暗图案的光接收元件; 二值化电路，用于根据从光接收元件输出的信号将数字信号分割成具有高亮度的模式和具有较低亮度的模式，将二值化处理执行相对于两种模式的色散的阈值 最大化，并且从二值化值解码伪随机码乘以ABS模式的最小线宽的单位; 以及位置检测电路，用于通过获取解码的伪随机码与伪随机码的设计值之间的相关性来计算相对于光接收元件的刻度的绝对位置。 由此，可以降低由ABS图案产生的信号的二值化误差，并且执行绝对位置的高精度和稳定的测量。

公开(公告)号：US07825368B2

公开(公告)日：2010-11-02

申请号：US12100017

申请日：2008-04-09

申请人： Kouhei Kusano

发明人： Kouhei Kusano

IPC分类号： G01D5/34

CPC分类号： G01D5/2497

摘要： An absolute position length-measurement type encoder includes a scale having an incremental track, an absolute track, and a reference position track. The incremental track has incremental patterns including first light and dark patterns formed at equal intervals in first periods. The absolute track has absolute patterns representing an absolute position. The reference position track has reference position patterns including second light and dark patterns formed at equal intervals in second periods longer than the first periods. A light source emits a measurement light to the scale. A photodetector receives the measurement light reflected at or transmitted through the scale. A signal processing circuit processes the received light signal of the photodetector to detect an absolute position of the scale.

摘要翻译： 绝对位置长度测量型编码器包括具有增量轨迹，绝对轨迹和参考位置轨迹的刻度。 增量轨迹具有增量模式，包括在第一时期以相等的间隔形成的第一光和暗图案。 绝对轨迹具有绝对位置的绝对模式。 参考位置轨迹具有包括在比第一周期长的第二周期中以等间隔形成的第二光和暗图案的参考位置图案。 光源将测量光发射到刻度。 光电检测器接收在标尺上反射或透射的测量光。 信号处理电路处理光电检测器的接收光信号以检测刻度的绝对位置。

公开(公告)号：US20080015805A1

公开(公告)日：2008-01-17

申请号：US11819093

申请日：2007-06-25

申请人： Kouhei Kusano

发明人： Kouhei Kusano

IPC分类号： G06F19/00 ,  G01C25/00

CPC分类号： G01D5/34 ,  G01D5/34792

摘要： A displacement detecting encoder including a scale having a positional code that contains positional information, a detection portion which is disposed so as to make a relative movement with respect to the scale and detect at least a part of the positional code equipped on the scale and a processing portion which processes a part of the positional code detected by the detection portion, thereby outputting the positional information, wherein the detected positional code is evaluated by positional code generating means for generating the positional code to detect the presence or absence of erroneous information. Thereby, an error in detecting a pseudo random code is detected by using a minimum code without addition of a redundant code and also correction can be made, thereby improving the reliability of generating ABS position signals.

摘要翻译： 一种位移检测编码器，包括具有包含位置信息的位置代码的标尺;检测部，其设置成相对于标尺进行相对移动，并且检测装在刻度上的位置代码的至少一部分;以及 处理部分，其处理由检测部分检测到的位置代码的一部分，从而输出位置信息，其中通过位置代码产生装置评估检测到的位置代码，用于产生位置代码以检测是否存在错误信息。 因此，通过使用不添加冗余码的最小代码来检测伪随机码的检测错误，并且还可以进行校正，从而提高产生ABS位置信号的可靠性。

公开(公告)号：US20080315076A1

公开(公告)日：2008-12-25

申请号：US12141529

申请日：2008-06-18

申请人： Kouhei Kusano

发明人： Kouhei Kusano

IPC分类号： G01D5/34

CPC分类号： G01D5/34784 ,  G01D5/2455 ,  G01D5/2458 ,  G01D5/2495 ,  G01D5/34746

摘要： A scale has a first incremental track with first incremental patterns including first light and dark patterns formed at equal intervals in first periods, an absolute track with absolute patterns representing absolute positions, and a second incremental track with second incremental patterns including second light and dark patterns formed at equal intervals in second periods longer than the first periods. A light source emits a measurement light to the scale. A photodetector receives the measurement light reflected at or transmitted through the scale. A signal processing circuit processes the received light signal of the photodetector to detect an absolute position of the scale.

摘要翻译： 刻度具有第一增量迹线，其具有第一增量图案，包括在第一周期中以相等间隔形成的第一光和暗图案，具有绝对图案的绝对迹线表示绝对位置，以及具有第二增量图案的第二增量轨迹，包括第二光和暗图案 在比第一个周期长的第二个周期以相等的间隔形成。 光源将测量光发射到刻度。 光电检测器接收在标尺上反射或透射的测量光。 信号处理电路处理光电检测器的接收光信号以检测刻度的绝对位置。

公开(公告)号：US20080252906A1

公开(公告)日：2008-10-16

申请号：US12100017

申请日：2008-04-09

申请人： Kouhei Kusano

发明人： Kouhei Kusano

IPC分类号： G01B11/14

CPC分类号： G01D5/2497

摘要： An absolute position length-measurement type encoder includes a scale having an incremental track, an absolute track, and a reference position track. The incremental track has incremental patterns including first light and dark patterns formed at equal intervals in first periods. The absolute track has absolute patterns representing an absolute position. The reference position track has reference position patterns including second light and dark patterns formed at equal intervals in second periods longer than the first periods. A light source emits a measurement light to the scale. A photodetector receives the measurement light reflected at or transmitted through the scale. A signal processing circuit processes the received light signal of the photodetector to detect an absolute position of the scale.

摘要翻译： 绝对位置长度测量型编码器包括具有增量轨迹，绝对轨迹和参考位置轨迹的刻度。 增量轨迹具有增量模式，包括在第一时期以相等的间隔形成的第一光和暗图案。 绝对轨迹具有绝对位置的绝对模式。 参考位置轨迹具有包括在比第一周期长的第二周期中以等间隔形成的第二光和暗图案的参考位置图案。 光源将测量光发射到刻度。 光电检测器接收在标尺上反射或透射的测量光。 信号处理电路处理光电检测器的接收光信号以检测刻度的绝对位置。

公开(公告)号：US07663093B2

公开(公告)日：2010-02-16

申请号：US12141529

申请日：2008-06-18

申请人： Kouhei Kusano

发明人： Kouhei Kusano

IPC分类号： G01D5/34

CPC分类号： G01D5/34784 ,  G01D5/2455 ,  G01D5/2458 ,  G01D5/2495 ,  G01D5/34746

摘要： A scale has a first incremental track with first incremental patterns including first light and dark patterns formed at equal intervals in first periods, an absolute track with absolute patterns representing absolute positions, and a second incremental track with second incremental patterns including second light and dark patterns formed at equal intervals in second periods longer than the first periods. A light source emits a measurement light to the scale. A photodetector receives the measurement light reflected at or transmitted through the scale. A signal processing circuit processes the received light signal of the photodetector to detect an absolute position of the scale.

摘要翻译： 刻度具有第一增量迹线，其具有第一增量图案，包括在第一周期中以相等间隔形成的第一光和暗图案，具有绝对图案的绝对迹线表示绝对位置，以及具有第二增量图案的第二增量轨迹，包括第二光和暗图案 在比第一个周期长的第二个周期以相等的间隔形成。 光源将测量光发射到刻度。 光电检测器接收在标尺上反射或透射的测量光。 信号处理电路处理光电检测器的接收光信号以检测刻度的绝对位置。

公开(公告)号：US20090294637A1

公开(公告)日：2009-12-03

申请号：US12385999

申请日：2009-04-27

申请人： Kouhei Kusano ,  Kouji Morimoto

发明人： Kouhei Kusano ,  Kouji Morimoto

IPC分类号： G01D5/34

CPC分类号： G01D5/34776 ,  G01D5/34715

摘要： In an absolute position detection type photoelectric encoder devised so as to detect a pseudorandom pattern disposed on a main scale by means of a plurality of imaging optical systems, assembling of the absolute position detection type photoelectric encoder is facilitated and production cost thereof is reduced by providing: a single light-receiving array element disposed on the imaging surfaces of the imaging optical systems, which incorporates a greater light-receiving array portion in the length measurement direction than the light-receiving range of the respective imaging optical systems; a window signal storing portion for storing a window signal showing a light-receiving range of the respective imaging optical systems; and a window signal comparison portion for obtaining signals corresponding to individual imaging ranges by comparing scanning signals of the light-receiving array element with window signals.

摘要翻译： 在通过多个成像光学系统检测设置在主刻度上的伪随机图案的绝对位置检测型光电编码器中，通过提供绝对位置检测型光电编码器的组装，通过提供绝对位置检测型光电编码器 ：设置在成像光学系统的成像表面上的单个光接收阵列元件，其在长度测量方向上包含比各个成像光学系统的光接收范围更大的光接收阵列部分; 窗口信号存储部分，用于存储表示各个成像光学系统的光接收范围的窗口信号; 以及窗口信号比较部分，用于通过将光接收阵列元件的扫描信号与窗口信号进行比较来获得对应于各个成像范围的信号。

公开(公告)号：US08039786B2

公开(公告)日：2011-10-18

申请号：US12385999

申请日：2009-04-27

申请人： Kouhei Kusano ,  Kouji Morimoto

发明人： Kouhei Kusano ,  Kouji Morimoto

IPC分类号： G01D5/34 ,  H01L27/00 ,  H03M1/22

CPC分类号： G01D5/34776 ,  G01D5/34715

摘要： In an absolute position detection type photoelectric encoder devised so as to detect a pseudorandom pattern disposed on a main scale by means of a plurality of imaging optical systems, assembling of the absolute position detection type photoelectric encoder is facilitated and production cost thereof is reduced by providing: a single light-receiving array element disposed on the imaging surfaces of the imaging optical systems, which incorporates a greater light-receiving array portion in the length measurement direction than the light-receiving range of the respective imaging optical systems; a window signal storing portion for storing a window signal showing a light-receiving range of the respective imaging optical systems; and a window signal comparison portion for obtaining signals corresponding to individual imaging ranges by comparing scanning signals of the light-receiving array element with window signals.

摘要翻译： 在通过多个成像光学系统检测设置在主刻度上的伪随机图案的绝对位置检测型光电编码器中，通过提供绝对位置检测型光电编码器的组装，通过提供绝对位置检测型光电编码器 ：设置在成像光学系统的成像表面上的单个光接收阵列元件，其在长度测量方向上包含比各个成像光学系统的光接收范围更大的光接收阵列部分; 窗口信号存储部分，用于存储表示各个成像光学系统的光接收范围的窗口信号; 以及窗口信号比较部分，用于通过将光接收阵列元件的扫描信号与窗口信号进行比较来获得对应于各个成像范围的信号。

公开(公告)号：US20100044551A1

公开(公告)日：2010-02-25

申请号：US12461371

申请日：2009-08-10

申请人： Kouhei Kusano

发明人： Kouhei Kusano

IPC分类号： G01D5/347

CPC分类号： G01D5/24476

摘要： The present invention relates to a photoelectric encoder including a scale having a grating (incremental pattern) of a predetermined pitch formed thereon and a light source (light-emitting element) and a light-receiving unit, which are relatively displaceable with respect to the scale, wherein light-receiving elements of the light-receiving unit output bright and dark signals of “N” phases, and the phases are detectedby fitting a sinusoidal wave function having a fixed period to the bright and dark signals of “N” phases, thereby reducing a position detection error resulting from stains on the scale and/or defects of the grating.

摘要翻译： 光电编码器技术领域本发明涉及一种光电编码器，其包括具有形成在其上的预定间距的光栅（增量图案）的刻度和相对于刻度相对位移的光源（发光元件）和光接收单元 其中，光接收单元的光接收元件输出“N”相的亮信号，并且通过将具有固定周期的正弦波函数拟合到“N”相的明暗信号来检测相位，由此 减少由于光栅的刻度和/或缺陷引起的污渍产生的位置检测误差。

公开(公告)号：US20090272886A1

公开(公告)日：2009-11-05

申请号：US12431340

申请日：2009-04-28

申请人： Kouhei Kusano ,  Kouji Morimoto

发明人： Kouhei Kusano ,  Kouji Morimoto

IPC分类号： G01D5/34

CPC分类号： G01D5/2497 ,  G01D5/2454 ,  G01D5/34792

摘要： The absolute position length measurement type encoder is provided with a scale for forming bright and dark patterns by the ABS pattern based on a pseudorandom code; an edge position detection circuit for obtaining a position, at which an after-differentiated absolute value of a binarized value is locally maximized, for each of the minimum line width zones of the ABS pattern by binarizing a signal from the light-receiving element that receives the bright and dark pattern; a peak position detection circuit for obtaining the peak position from a histogram with respect to the position; a decoding circuit for decoding the pseudorandom code based on the binarized value; an absolute position detection circuit for calculating an absolute position by referencing the pseudorandom code to the design value; and a position data synthesizing circuit for correcting the absolute position by the peak position, whereby the absolute position can be calculated with a small arithmetic operation amount even if the pseudorandom code is used for the ABS pattern, and accuracy of the absolute position can be secured even where the ABS pattern is subjected to thickening, etc.

摘要翻译： 绝对位置长度测量型编码器具有用于通过基于伪随机码的ABS图案形成明暗图案的刻度; 边缘位置检测电路，用于通过二次化来自接收到的光接收元件的信号来获得针对ABS图案的每个最小线宽区域而局部最大化二值化值的差分后绝对值的位置 明暗模式; 峰值位置检测电路，用于从相对于位置的直方图获得峰值位置; 解码电路，用于基于所述二值化值对所述伪随机码进行解码; 绝对位置检测电路，用于通过将伪随机码引用到设计值来计算绝对位置; 以及用于通过峰值位置校正绝对位置的位置数据合成电路，由此即使使用伪随机码用于ABS图案，也可以以小的算术运算量计算绝对位置，并且可以确保绝对位置的精度 即使ABS图案经受增稠等