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    • 2. 发明申请
    • Optical encoder
    • 光学编码器
    • US20050052729A1
    • 2005-03-10
    • US10697322
    • 2003-10-31
    • Muneo MitamuraYoshinori ItoSadaharu Kanamori
    • Muneo MitamuraYoshinori ItoSadaharu Kanamori
    • G01D5/36G01D5/347G01P3/486H03M1/30H01S3/00
    • G01D5/34715G01P3/486H03M1/308
    • A projection-type linear encoder has a moving grating plate formed with a set of photodiodes for detecting an origin position and a reflective grating plate formed with reflective grating sections for detecting an origin position. The set of photodiodes for detecting an origin position includes photodiodes (5Z, 5Z1, 5Z′, 5Z1′) that are aligned in accordance with an alignment pattern produced using random numbers, and the reflective grating sections for detecting the origin position include reflective grating sections and non-reflective grating sections that are wider than grating sections for detecting an A phase signal and a B phase signal similarly disposed in accordance with an alignment pattern produced using random numbers. The origin position of the moving grating plate can be precisely detected based on a differential signal of photodiodes (5Z) and photodiodes (5Z′) and a differential signal of photodiodes (5Z1, 5Z1′) that differ in phase by 90° to the photodiodes (5Z, 5Z′).
    • 投影型线性编码器具有形成有用于检测原点位置的一组光电二极管的移动光栅板和形成有用于检测原点位置的反射光栅部分的反射光栅板。 用于检测原点位置的一组光电二极管包括根据使用随机数产生的对准图案对准的光电二极管(5Z,5Z1,5Z',5Z1'),并且用于检测原点位置的反射光栅部分包括反射光栅部分 以及比用于检测A相信号的光栅部分宽的非反射光栅部分和根据使用随机数产生的对准图案类似地设置的B相信号。 可以基于光电二极管(5Z)和光电二极管(5Z')的差分信号和与光电二极管相位相差90°的光电二极管(5Z1,5Z1')的差分信号,精确检测移动光栅板的原点位置 (5Z,5Z')。
    • 3. 发明授权
    • Encoder signal interpolation divider
    • 编码器信号插补分频器
    • US06950769B2
    • 2005-09-27
    • US10819206
    • 2004-04-07
    • Yoshinori ItoSadaharu KanamoriMuneo Mitamura
    • Yoshinori ItoSadaharu KanamoriMuneo Mitamura
    • G01D5/245G01D5/244G01C25/00G01D18/00G01F25/00
    • G01D5/24452G01D5/24409G01D5/2448G01D5/2449
    • In an encoder signal interpolation divider (1) that automatically corrects errors in the offset and gain of an input signal at a high speed with a low cost circuit configuration, and can accurately generate an encoder signal having a predetermined resolution by interpolation division, analog input signals (A1, B1) are subjected to offset correction by a 0-point correction circuit (13) in adders (4, 5) prior to being digitally converted by A/D converters (8, 9), and are subjected to gain correction by an amplitude correction circuit (14) in amplifiers (6, 7). The corrected analog signals are converted to digital values, angle data is calculated in an angle data lookup table (10), and, based on these results, an encoder pulse signal having a predetermined resolution is generated and output from an encoder pulse signal generating circuit (12).
    • 在编码器信号插值分配器(1)中,以低成本的电路结构自动校正输入信号的偏移和增益的误差,并且可以通过内插分割精确地生成具有预定分辨率的编码器信号,模拟输入 在由A / D转换器(8,9)进行数字转换之前,通过加法器(4,5)中的0点校正电路(13)对信号(A 1,B 1)进行偏移校正, 通过放大器(6,7)中的幅度校正电路(14)进行增益校正。 校正的模拟信号被转换为数字值,角度数据在角度数据查找表(10)中计算,并且基于这些结果,生成具有预定分辨率的编码器脉冲信号并从编码器脉冲信号发生电路 (12)。