基于叠栅条纹光电信号的全微分测速方法  

Method of Velocity Measurement Based on Moire Fringe and Total Differential Equations

作　　者：王亚洲[1,2] 万秋华[1] 王树洁[1] 杨守旺[1] 杜颖财[1] 

机构地区：[1]中国科学院长春光学精密机械与物理研究所,吉林长春130033 [2]中国科学院大学,北京100049

出　　处：《中国激光》2015年第11期177-184,共8页Chinese Journal of Lasers

基　　金：中国科学院知识创新工程领域前沿项目(070Y32R070)

摘　　要：为了提高光电编码器速度检测精度,设计了一种基于叠栅条纹光电信号的编码器测速方法。结合全微分方程,建立叠栅条纹光电信号测速模型。分析了影响编码器测速精度的主要因素,并对比不同误差对测速精度的影响。结合测速模型设计改进算法,并完成系统实现。实验结果表明:对某21位光电编码器进行测速实验,将测速误差均方根由0.0367 rad/s降低到0.0216 rad/s。此方法测量速度快,测速精度高,适合实时性要求较高的控制场合。For the purpose of improving the velocity measurement accuracy of photoelectric encoders, a velocity measurement method based on the signal of moire fringe is proposed. A velocity measurement model based on moire fringe is established using the total differential equations. The main factors affecting velocity measuring accuracy are analyzed and the influence of different factors is compared. An improved algorithm is deduced and the measurement system is established based on the velocity model. Measurement results on some 21-bit photoelectric encoder indicate that the root mean square of measurement error has reduced from 0.0367 rad/s to 0.0216 rad/s. This method can achieve fast and high-accuracy measurement, and be suitable for the control system requiring for high real-time capability.

关 键 词：测量 光电轴角编码器 光电叠栅条纹 高精度测速 

分 类 号：TP212[自动化与计算机技术—检测技术与自动化装置]