高精度增量式光电编码器信号处理系统

为提高增量式光电编码器的输出精度，减小信号处理电路复杂度，提高伺服控制系统的稳定性，研制了一种单圈输出32 400 周期方波信号的高精度增量式光电编码器。该编码器外径为90 mm，码盘一周刻划3 240 线，数据处理系统可完成对莫尔条纹信号的40 倍准确细分。实验结果表明，此编码器输出信号精度正交性偏差小于15%，均匀性偏差小于20%，大幅减小了应用增量式编码器时伺服系统的抖动。

High Precision Signal Processing System of Incremental Encoder

In order to improve the precision of the incremental photoelectric encoder，reduce the complexity of the signal processing circuit and improve the stability of the servo control system，a high precision incremental encoder with a single loop output of 32 400 periodic square wave signals is developed． The encoder has an outer diameter of 90 mm，and the encoder has 3 240 lines． The data processing system completes 40 times accurate segmentation of Moiré fringe signals． Experiment result shows that the orthogonality deviation is less than 15% and the uniformity deviation is less than 20%，which greatly reduces the jitter of the servo system when the incremental encoder is applied．