Calculation Method of the Eccentric Position of the Circular Grating for Encoder Adjustment System

WANG Yi-wen; ZHOU Zhi-long; WANG Fei; LIU Xian-li; FU Peng-qiang; MEI Heng; LIU Yong-gang; LIN Chang-you

doi:10.15938/j.jhust.2017.04.022

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Calculation Method of the Eccentric Position of the Circular Grating for Encoder Adjustment System

更新时间：2026-08-31

- Calculation Method of the Eccentric Position of the Circular Grating for Encoder Adjustment System
- Vol. 22, Issue 4, Pages: 122-128(2017)
- 作者机构：
  
  哈尔滨理工大学机械动力工程学院,黑龙江,哈尔滨,150080
- 作者简介：
- 基金信息：
- DOI：10.15938/j.jhust.2017.04.022
  CLC： TP391
- Published：2017
- 稿件说明：
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WANG Yi-wen, ZHOU Zhi-long, WANG Fei, et al. Calculation Method of the Eccentric Position of the Circular Grating for Encoder Adjustment System[J]. 2017, 22(4): 122-128.
DOI：

WANG Yi-wen, ZHOU Zhi-long, WANG Fei, et al. Calculation Method of the Eccentric Position of the Circular Grating for Encoder Adjustment System[J]. 2017, 22(4): 122-128. DOI： 10.15938/j.jhust.2017.04.022.

摘要

编码器圆光栅装配过程中，编码器主轴的回转中心与圆光栅码道基圆中心之间的安装距离对编码器信号输出精度有较大影响。为了提高编码器圆光栅装配过程偏心检测的效率和检测精度，便于后续进行偏心调整，提出了一种计算编码器偏心角度位置及偏心值大小的方法。通过对光栅码道图像的特征提取及数据分析，计算码道基圆上不同位置的横坐标最大值，得到光栅偏心位置及偏心值大小。实验结果表明，这种方法能够比较有效的计算出光栅的偏心位置及角度，用这种偏心计算方法的调整系统具有较高的偏心调整精度和调整效率，同时能够降低码道加工误差对调整结果的影响。

Abstract

In the assembly process of the encoder circular grating，the installation distance between the rotary central of the spindle and the base circle center of the code of circular grating has a great influence on the output precision of the encoder signal. In order to improve the detection efficiency and detection accuracy of the circular grating eccentricity detection process，a new method for calculating the angle position and the value of the eccentricity of the encoder is proposed. Through the feature extraction and data analysis of the coded image of grating，the maximum of abscissa in different position of code basic circle is calculated，the angle position and the value of the eccentricity are obtained. Experimental results show that this method can effectively calculate the eccentric position and angle of the grating. The adjustment system of this method has a higher precision and the adjustment efficiency，and can reduce the influence of the processing error on adjustment results.

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