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    Absolute position encoder
    1.
    发明公开
    Absolute position encoder 有权
    Absoluter Positionscodierer

    公开(公告)号：EP2006642A2

    公开(公告)日：2008-12-24

    申请号：EP08158606.7

    申请日：2008-06-19

    申请人： Mitutoyo Corporation

    发明人： Kusano, Kouhei

    IPC分类号： G01D5/347

    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迹线，包括第二光和暗图案 在比第一个周期长的第二个周期内以相等的间隔形成。 光源发射测量光到刻度。 光电检测器接收在标尺上反射或透过标尺的测量光。 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。

    Absolute position length measurement type encoder
    2.
    发明授权
    Absolute position length measurement type encoder 有权
    绝对位置长度测量型编码器

    公开(公告)号：EP2110645B1

    公开(公告)日：2018-02-21

    申请号：EP09157934.2

    申请日：2009-04-15

    申请人： Mitutoyo Corporation

    发明人： Kusano, Kouhei ,  Morimoto, Kouji

    IPC分类号： G01D5/347

    CPC分类号： G01D5/34746 ,  G01D5/34776

    摘要： An absolute position length measurement type encoder includes: a scale (102) which has an ABS pattern (104) based on a pseudorandom code and forms bright and dark patterns by the ABS pattern (104) ; a light-receiving element (112) for receiving the bright and dark patterns; a binarization circuit (124) for dividing a digital signal (SA3) in accordance with a signal (SA1) output from the light-receiving element (112) into a mode (B) having high brightness and a mode (D) having lower brightness, carrying out a binarization process by a threshold value (k) where dispersion (Ã' B 2 , à W 2 or à T 2 ) with regard to the two modes is maximized, and decoding the pseudorandom code by the unit of minimum line width (P ABS ) of the ABS pattern (104) from the binarized values; and a position detection circuit (130) for calculating the absolute position of the scale (102) with respect to the light-receiving element (112) 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.

    Absolute position length measurement type encoder
    3.
    发明公开
    Absolute position length measurement type encoder 有权
    纵向测量类型的绝对位置

    公开(公告)号：EP2110645A3

    公开(公告)日：2012-03-28

    申请号：EP09157934.2

    申请日：2009-04-15

    申请人： Mitutoyo Corporation

    发明人： Kusano, Kouhei ,  Morimoto, Kouji

    IPC分类号： G01D5/347

    CPC分类号： G01D5/34746 ,  G01D5/34776

    摘要： An absolute position length measurement type encoder includes: a scale (102) which has an ABS pattern (104) based on a pseudorandom code and forms bright and dark patterns by the ABS pattern (104) ; a light-receiving element (112) for receiving the bright and dark patterns; a binarization circuit (124) for dividing a digital signal (SA3) in accordance with a signal (SA1) output from the light-receiving element (112) into a mode (B) having high brightness and a mode (D) having lower brightness, carrying out a binarization process by a threshold value (k) where dispersion (σ' B 2 , σ W 2 or σ T 2 ) with regard to the two modes is maximized, and decoding the pseudorandom code by the unit of minimum line width (P ABS ) of the ABS pattern (104) from the binarized values; and a position detection circuit (130) for calculating the absolute position of the scale (102) with respect to the light-receiving element (112) 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.

    Photoelectric Encoder and Scale
    4.
    发明公开
    Photoelectric Encoder and Scale 审中-公开
    Photoelektrischer Codierer和Skala

    公开(公告)号：EP2093543A2

    公开(公告)日：2009-08-26

    申请号：EP09153333.1

    申请日：2009-02-20

    申请人： Mitutoyo Corporation

    发明人： Kusano, Kouhei

    IPC分类号： G01D5/347

    CPC分类号： G01D5/34746 ,  G01D5/34776

    摘要： According to an aspect of the present invention, there is provided a photoelectric encoder including: a scale; a light source irradiating a measurement light onto the scale; a light receiving unit receiving the measurement light reflected or transmitted by the scale; and a signal processing circuit processing a light receiving signal of the light receiving unit and detecting an absolute position of the scale, wherein the scale is configured to be relatively movable to the light source and the light receiving unit in a measuring direction, and includes a modulation incremental track that includes a modulation incremental pattern having a plurality of modulation scale patterns arranged thereon, and the modulation incremental pattern is formed so that a shape or a pitch of the modulation scale patterns changes periodically in the measuring direction within a first period.

    摘要翻译： 根据本发明的一个方面，提供了一种光电编码器，包括：刻度; 将测量光照射到刻度上的光源; 光接收单元，其接收由所述刻度尺反射或透射的测量光; 以及处理光接收单元的光接收信号并检测刻度的绝对位置的信号处理电路，其中刻度尺被配置为在测量方向上可相对于光源和光接收单元移动，并且包括 调制增量轨迹，其包括其上布置有多个调制标度图案的调制增量图案，并且形成调制增量图案，使得调制标尺图案的形状或间距在第一周期内沿测量方向周期性地改变。

    Displacement detecting encoder
    5.
    发明公开
    Displacement detecting encoder 有权
    编码器，用于确定移

    公开(公告)号：EP1876424A3

    公开(公告)日：2008-05-14

    申请号：EP07012953.1

    申请日：2007-07-02

    申请人： MITUTOYO CORPORATION

    发明人： Kusano, Kouhei

    IPC分类号： G01D5/34

    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 positionalcodeisevaluated by positionalcode 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.

    Absolute Position Detection Type Photoelectric Encoder
    8.
    发明公开
    Absolute Position Detection Type Photoelectric Encoder 审中-公开
    Photoelektrischer Codierer vom Absolutpositionsdetektionstyp

    公开(公告)号：EP2131158A2

    公开(公告)日：2009-12-09

    申请号：EP09159202.2

    申请日：2009-04-30

    申请人： Mitutoyo Corporation

    发明人： Kusano, Kouhei ,  Morimoto, Kouji

    IPC分类号： G01D5/347

    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 (200) disposed on a main scale by means of a plurality of imaging optical systems (110), 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 (136) disposed on the imaging surfaces of the imaging optical systems (110), which incorporates a greater light-receiving array portion (138) in the length measurement direction than the light-receiving range of the respective imaging optical systems (110A-110E); a window signal storing portion (320) for storing a window signal showing a light-receiving range of the respective imaging optical systems; and a window signal comparison portion (340) 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（110）检测设置在主刻度上的伪随机图案（200）的绝对位置检测型光电编码器中，促进绝对位置检测型光电编码器的组装和生产 通过提供：设置在成像光学系统（110）的成像表面上的单个光接收阵列元件（136），其在长度测量方向上包含更大的光接收阵列部分（138），比成像光学系统 各个成像光学系统（110A-110E）的光接收范围; 窗口信号存储部分（320），用于存储示出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（340），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。

    Absolute position length measurement type encoder
    10.
    发明公开
    Absolute position length measurement type encoder 有权
    纵向测量类型的绝对位置

    公开(公告)号：EP2113748A3

    公开(公告)日：2013-02-20

    申请号：EP09158947.3

    申请日：2009-04-28

    申请人： Mitutoyo Corporation

    发明人： Kusano, Kouhei ,  Morimoto, Kouji

    IPC分类号： G01D5/245 ,  G01D5/249 ,  G01D5/347

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

    摘要： The absolute position length measurement type encoder is provided with a scale (102) for forming bright and dark patterns by the ABS pattern (104) based on a pseudorandom code; an edge position detection circuit (124) 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 (P ABS ) zones of the ABS pattern (104) by binarizing a signal (SA3) from the light-receiving element (112) that receives the bright and dark pattern; a peak position detection circuit (126) for obtaining the peak position (PK) from a histogram with respect to the position; a decoding circuit (128) for decoding the pseudorandom code based on the binarized value; an absolute position detection circuit (130) for calculating an absolute position by referencing the pseudorandom code to the design value; and a position data synthesizing circuit (132) for correcting the absolute position by the peak position (PK), 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.