光电编码器信号误差补偿技术研究  

Research on Signal Error Compensation Technology of Photoelectric Encoder

作　　者：毕今朝 蒋佳奇 张洪博 常玉春[1] BI Jinzhao;JIANG Jiaqi;ZHANG Hongbo;CHANG Yuchun(College of Electronic Science and Engineering,Jilin University,Changchun 130012,China)

机构地区：[1]吉林大学电子科学与工程学院,长春130012

出　　处：《吉林大学学报（信息科学版）》2022年第4期553-558,共6页Journal of Jilin University（Information Science Edition）

基　　金：2019年吉林省预算内基本建设(创新能力建设-高技术产业部分)基金资助项目(2019C035-3)。

摘　　要：为提高光电编码器的细分精度,实现莫尔条纹信号的补偿和校正,分析了对信号质量产生影响的误差来源,建立了莫尔条纹信号的波形方程。设计了一种利用布谷鸟搜索算法结合最小二乘法,用残差平方和作为适应度函数实现波形方程多参数辨识的方法。并利用辨识得到的参数结合波形方程对信号中的正弦性偏差、直流分量和等幅性偏差进行修正。将辨识得到的相位参数用于构建查找表,以实现信号的正交性偏差补偿。实验结果表明,上述方法有效降低了输出信号中出现的偏差,提高了光电编码器的细分精度。In order to improve the subdivision accuracy of the photoelectric encoder and realize the compensation and correction of the Moiréfringe signal,the source of the error that affects the signal quality is analyzed,and the waveform equation of the Moiréfringe signal is established.And a method using the cuckoo search algorithm combined with the least square method is designed,and using the residual sum of squares as the fitness function to realize the multi-parameter identification of the waveform equation.And the sinusoidal deviation,DC(Direct Current)component and amplitude deviation in the signal are corrected by using the identified parameters and the waveform equation.The identified phase parameters are used to construct a look-up table to compensate the orthogonality deviation of the signal.The experimental results show that the method effectively reduces the deviation in the output signal and improves the subdivision accuracy of the photoelectric encoder.

关 键 词：莫尔条纹信号 布谷鸟搜索算法 信号处理 误差补偿 

分 类 号：TP212.1[自动化与计算机技术—检测技术与自动化装置]