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公开(公告)号：EP2708855B1
公开(公告)日：2018-11-14
申请号：EP13182730.5
申请日：2013-09-03
发明人： Ishizuka, Ko , Ogasawara, Makiko
CPC分类号： G01D5/34776 , G01D5/2455 , G01D5/34792
摘要： A two-dimensional absolute encoder includes a scale (SCL) having marks arranged thereon along first and second directions different from each other, a detector (PDA(X), PDA(Y)) configured to perform first detection that detects rows of a first number of marks arranged in the first direction and second detection that detects rows of a second number of marks arranged in the second direction, and a processor (PRC) configured to determine absolute positions of the scale in the first and second directions based on outputs from the detector. Each of the marks has one of different characteristic values each corresponding to a combination of a quantized first code for indicating a position in the first direction and a quantized second code for indicating a position in the second direction, the number of the different characteristic values being smaller than the number of the combinations.
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公开(公告)号：EP2369303B1
公开(公告)日：2016-11-23
申请号：EP11157257.4
申请日：2011-03-08
发明人： Ishizuka, Ko
IPC分类号： G01D5/347
CPC分类号： G01D5/34707
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公开(公告)号：EP2708855A3
公开(公告)日：2015-10-21
申请号：EP13182730.5
申请日：2013-09-03
发明人： Ishizuka, Ko , Ogasawara, Makiko
CPC分类号： G01D5/34776 , G01D5/2455 , G01D5/34792
摘要： A two-dimensional absolute encoder includes a scale (SCL) having marks arranged thereon along first and second directions different from each other, a detector (PDA(X), PDA(Y)) configured to perform first detection that detects rows of a first number of marks arranged in the first direction and second detection that detects rows of a second number of marks arranged in the second direction, and a processor (PRC) configured to determine absolute positions of the scale in the first and second directions based on outputs from the detector. Each of the marks has one of different characteristic values each corresponding to a combination of a quantized first code for indicating a position in the first direction and a quantized second code for indicating a position in the second direction, the number of the different characteristic values being smaller than the number of the combinations.
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24.发明公开
公开(公告)号：EP2708855A2
公开(公告)日：2014-03-19
申请号：EP13182730.5
申请日：2013-09-03
发明人： Ishizuka, Ko , Ogasawara, Makiko
CPC分类号： G01D5/34776 , G01D5/2455 , G01D5/34792
摘要： A two-dimensional absolute encoder includes a scale (SCL) having marks arranged thereon along first and second directions different from each other, a detector (PDA(X), PDA(Y)) configured to perform first detection that detects rows of a first number of marks arranged in the first direction and second detection that detects rows of a second number of marks arranged in the second direction, and a processor (PRC) configured to determine absolute positions of the scale in the first and second directions based on outputs from the detector. Each of the marks has one of different characteristic values each corresponding to a combination of a quantized first code for indicating a position in the first direction and a quantized second code for indicating a position in the second direction, the number of the different characteristic values being smaller than the number of the combinations.
摘要翻译： 二维绝对编码器包括具有沿彼此不同的第一和第二方向布置在其上的标记的刻度（SCL），被配置为执行第一检测的检测器（PDA（X），PDA（Y）），其检测第一 根据第一方向排列的标记数和检测排列在第二方向上的第二数量的标记的行的第二检测，以及处理器（PRC），其被配置为基于来自第一和第二方向的输出来确定第一和第二方向上的刻度的绝对位置 检测器。 每个标记具有不同的特征值之一，每个特征值对应于用于指示第一方向上的位置的量化的第一代码和用于指示第二方向上的位置的量化的第二代码的组合，不同的特征值的数量为 小于组合的数量。
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公开(公告)号：EP1647798B1
公开(公告)日：2013-11-06
申请号：EP05021142.4
申请日：2005-09-28
发明人： Ishizuka, Ko
IPC分类号： G01B9/02
CPC分类号： G01B9/02018 , G01B9/02061 , G01B9/02079 , G01B2290/15 , G01B2290/45 , G01B2290/70
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公开(公告)号：EP2416126A1
公开(公告)日：2012-02-08
申请号：EP11171858.1
申请日：2011-06-29
发明人： Ishizuka, Ko
IPC分类号： G01D5/347
CPC分类号： G01D5/34707
摘要： An absolute encoder includes a scale (SCL) in which plural marks are arranged at a first pitch; a detector (PDA) configured to detect a predetermined number of marks corresponding to one of the absolute codes; and a calculator (CULC) configured to calculate an absolute position of the scale based on an output of the detector. The calculator is configured to generate a data sequence constituted by the predetermined number of data by respectively quantizing the predetermined number of periodic signals output from the detector, and to obtain first position data corresponding to the one of the absolute codes based on the generated data sequence, to obtain second position data based on a phase of at least one of the predetermined number of periodic signals, and to generate data which represents the absolute position by combining the first position data and the second position data.
摘要翻译： 绝对编码器包括其中多个标记以第一间距排列的刻度（SCL）; 检测器（PDA），被配置为检测对应于绝对代码之一的预定数量的标记; 以及计算器（CULC），其被配置为基于所述检测器的输出来计算所述刻度的绝对位置。 计算器被配置为通过分别量化从检测器输出的预定数量的周期信号来生成由预定数量的数据构成的数据序列，并且基于生成的数据序列获得与绝对代码中的一个相对应的第一位置数据 基于预定数量的周期信号中的至少一个的相位来获得第二位置数据，并且通过组合第一位置数据和第二位置数据来生成表示绝对位置的数据。
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公开(公告)号：EP0364984A2
公开(公告)日：1990-04-25
申请号：EP89119346.8
申请日：1989-10-18
CPC分类号： G01D5/38
摘要： An interferometer for measuring the displacement of a diffraction grating includes a multi-mode semiconductor laser (1) for generating a laser beam; a device (20) for supplying a predetermined current to the laser so that at least five vertical modes occur in an oscillation spectrum of the laser beam generated by the laser at an intensity ratio of at least 0.05; and an optical system (3) for splitting the laser beam generated by the laser into first and second beams. The optical system also directs the first and second beams to the diffraction grating (6) and effects interference between a first diffracted light beam generated by the diffraction of the first beam at the diffraction grating and a second diffracted light beam generated by the diffraction of the second beam at the diffraction grating to produce an interference light beam. Also provided is a photoelectric convertor (13) for converting the interference light beam into an electrical signal.
摘要翻译： 用于测量衍射光栅的位移的干涉仪包括用于产生激光束的多模半导体激光器（1）; 用于向所述激光器提供预定电流，使得由所述激光器产生的所述激光束的振荡光谱以至少为0.05的强度比发生至少五个垂直模式的装置（20） 以及用于将由激光器产生的激光束分成第一和第二光束的光学系统（3）。 光学系统还将第一和第二光束引导到衍射光栅（6），并且在衍射光栅处的第一光束的衍射产生的第一衍射光束和由衍射光栅的衍射产生的第二衍射光束之间产生干涉 在衍射光栅处的第二光束产生干涉光束。 还提供了一种用于将干涉光束转换成电信号的光电转换器（13）。
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公开(公告)号：EP2937671A1
公开(公告)日：2015-10-28
申请号：EP15001094.0
申请日：2015-04-15
发明人： Ishizuka, Ko
CPC分类号： G01D5/34776 , G01D5/24466 , G01D5/24471 , G01D5/24495 , G01D5/2455 , G01D5/2492 , G01D5/2495 , G01D5/34715 , G01D5/34746 , G01D5/34792
摘要： There is provided an absolute encoder advantageous in accuracy of an output thereof against a defect in a scale thereof. In the absolute encoder, a detector detects a part of an array of marks of the scale, and outputs a data sequence corresponding to the part. A processor stores information indicating a correspondence between each of a plurality of code sequences and an absolute coordinate of motion of the scale, and outputs information of the absolute coordinate based on the data sequence and the information. The processor detects an error of the data sequence, and performs rewriting of the information based on the detected error.
摘要翻译： 提供了一种绝对编码器，其对于其输出的精度有利于其等级的缺陷。 在绝对编码器中，检测器检测标尺的标记阵列的一部分，并输出与该部分对应的数据序列。 处理器存储指示多个代码序列中的每一个与标尺的绝对运动坐标之间的对应关系的信息，并且基于数据序列和信息输出绝对坐标的信息。 处理器检测数据序列的错误，并且基于检测到的错误来执行信息的重写。
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公开(公告)号：EP2551646A3
公开(公告)日：2013-06-26
申请号：EP12176064.9
申请日：2012-07-12
发明人： Ishizuka, Ko
IPC分类号： G01D5/347
CPC分类号： G01D5/34707
摘要： A scale (SCL) of an absolute encoder, on which a plurality of marks are arranged at predetermined pitches along at least one direction, includes: a base (Ba, Bb, G) including a plurality of light-reflective or light-transmissive marks (RGP) arranged at the predetermined pitches along the at least one direction. A film (HTL, HT), which attenuates light, is formed on each of marks (HTP) as a part of the plurality of marks.
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公开(公告)号：EP2466266A2
公开(公告)日：2012-06-20
申请号：EP11191040.2
申请日：2011-11-29
发明人： Ishizuka, Ko
CPC分类号： G01D5/34792 , G01D5/244 , G01D5/24476 , G01D5/3473
摘要： An absolute rotary encoder comprises a scale (SCL) having marks arranged at a first pitch; a first detector (PDA_A) and a second detector (PDA_B) including plural photoelectric conversion elements arranged at a second pitch smaller than the first pitch, and configured to detect a predetermined number of marks, the second detector disposed opposite to the first detector; and a computing device (CULC). The computing device is configured to generate a data string by quantizing a periodic signal output from the first detector, and obtains first angle data from the data string, to normalize amplitudes of the periodic signals output from the first and second detectors, to average the normalized periodic signal to obtain second angle data from a phase of the averaged periodic signal, and to combine the first and second angle data to generate data representing an absolute rotation angle.
摘要翻译： 绝对式旋转编码器包括具有以第一节距排列的标记的标尺（SCL） 第一检测器（PDA_A）和第二检测器（PDA_B），其包括以小于第一节距的第二节距排列的多个光电转换元件，并且被配置为检测预定数量的标记， 和计算设备（CULC）。 计算装置被配置为通过量化从第一检测器输出的周期性信号来生成数据串，并且从数据串获得第一角度数据，以对从第一检测器和第二检测器输出的周期性信号的幅度进行归一化，以将归一化 周期性信号以从平均周期性信号的相位获得第二角度数据，并且组合第一角度数据和第二角度数据以生成表示绝对旋转角度的数据。
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