<i>I-Q</i> Balanced Photoelectric Coding and Decoding Method of Grating Ruler

Cao Zhan-xin; Gu Yu-da; Zhou Yan-zhou

doi:10.12052/gdutxb.200136

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I-Q Balanced Photoelectric Coding and Decoding Method of Grating Ruler

更新时间：2026-05-27

- I-Q Balanced Photoelectric Coding and Decoding Method of Grating Ruler
- Vol. 38, Issue 3, Pages: 42-47(2021)
- 作者机构：
  
  广东工业大学自动化学院,广东,广州,510006
- 作者简介：
- 基金信息：
- DOI：10.12052/gdutxb.200136
  CLC： TP202+.1
- Online First：10 May 2021，
  
  Published：2021
- 稿件说明：
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曹湛昕, 古宇达, 周延周. 光栅尺的I-Q平衡式光电编码与解码方法[J]. 广东工业大学学报, 2021, 38(3): 42-47.

Cao Zhan-xin, Gu Yu-da, Zhou Yan-zhou. I-Q Balanced Photoelectric Coding and Decoding Method of Grating Ruler[J]. 2021, 38(3): 42-47. DOI: 10.12052/gdutxb.200136.
曹湛昕, 古宇达, 周延周. 光栅尺的I-Q平衡式光电编码与解码方法[J]. 广东工业大学学报, 2021, 38(3): 42-47. DOI： 10.12052/gdutxb.200136.

Cao Zhan-xin, Gu Yu-da, Zhou Yan-zhou. I-Q Balanced Photoelectric Coding and Decoding Method of Grating Ruler[J]. 2021, 38(3): 42-47. DOI: 10.12052/gdutxb.200136. DOI：

摘要

光栅作为位移、速度和加速度测量的重要器件

在高精度、高速自动化数控反馈闭环系统有广泛应用。为增强其高速测量的可靠性

提出了一种直线光栅尺的

I-Q

平衡式光电编码与解码方法。主光栅和指示光栅平行放置

光栅常数差别形成莫尔条纹。光电探测单元的每个光电二极管为独立检测通道

按照固定空间频率莫尔条纹相对相位位置分布

并经过独立的、按

I-Q

平衡式编码与解码方程设计放大倍数的直流运放电路放大

最后按

I-Q

平衡式编码与解码方程条件分别送入2路加法器

加法器输出就是标准和通用的2路

I-Q

正交信号

符合自动化设备使用标准。该方法使得自动化数控闭环系统的抗光栅表面污染、抗光电二极管分布位置误差和抗低频振动等能力全面增强

是一种高效、可靠、实用性强的光栅技术。

Abstract

As an important device for displacement

velocity and acceleration measurement

gratings are widely used in high-precision

high-speed automated CNC feedback closed-loop systems. In order to enhance the reliability of high-speed measurement

a linear encoder with

I-Q

balanced photoelectric coding and decoding method is proposed. The main grating and the indicating grating are placed in parallel

and the difference in grating constant forms a moiré fringe. Each photodiode of the photodetection unit is an independent detection channel

which is distributed according to the relative phase position of the moiré fringe at a fixed spatial frequency

and is amplified by an independent DC operational am

plifier circuit designed according to the

I-Q

balanced encoding and decoding equation.

I-Q

balanced encoding and decoding equation conditions are respectively sent to the 2-way adder

and the output of the adder is the standard and general 2-way

I-Q

quadrature signal

which is in line with the standard for automation equipment. This method comprehensively enhances the automatic numerical control closed-loop system's anti-grating surface pollution

anti-photodiode distribution position error and anti-low-frequency vibration ability

and is an efficient

reliable

and practical grating technology.

关键词

Keywords

references

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PARK J, CHOI H, LIM G, et al . Development of a wide-width raster scanning optical system for high-resolution ultraviolet laser direct micro-patterning [J ] . Optics and Lasers in Engineering, 2020: 134.

王卓, 贾明泽. 基于光栅相移的三维扫描重建设备设计[J]. 技术与市场, 2020, 27(4): 83-84.

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I-Q Balanced Photoelectric Coding and Decoding Method of Grating Ruler

DOI：10.12052/gdutxb.200136

摘要

Abstract

关键词

Keywords

references