CHEN Yun, GAO Shengying, ZHANG Xi, et al. Research and fabrication of reflective sub miniature photoelectric encoder[J]. 2019, 38(9): 102-104. DOI: 10.13873/J.1000-9787(2019)09-0102-03.
反射式超小型光电编码器研制
摘要
为了满足光电编码器的小型化、重量轻和高精度、高分辨率的技术要求
本文研制了反射式超小尺寸光电编码器。首先
提出利用反射式的光电信号识取方式
减少码盘码道数
从而减小体积
优化结构
同时给出反射式超小型光电编码器的总体设计;其次
针对单零点增量式寻零效率低
提出采用多零点准绝对式的编码方式
利用32位的ARM实现光电信号的采集与处理
并通过RS422传输角度信息;最后
使用自准直平行光管和12面体检测精度。实验结果表明:该编码器的分辨率为19. 78″(16位)
精度σ=21. 37″
尺寸26 mm×26 mm
重量仅为19 g。
Abstract
In order to satisfy technical requirement of miniaturization
light weight
high precision and high resolution ratio of photoelectric encoder
a reflective sub miniature photoelectric encoder is researched and fabricated. First of all
the reflective photoelectric signal picking mode is employed to reduce code number of code disc
so as to decrease size and optimize structure
and overall design of reflective sub-miniature photoelectric encoder at the same time. Secondly
aiming at low efficiency of finding zero
multiple zeros quasi-absolute coding scheme is proposed. The 32 bit ARM is used
acquisition and processing of photoelectric signal and the angle information is transmitted by RS—422. Finally
autocollimation and 12 surfaces polyhedron are used to test the precision. The results show that the resolution is 19. 78″( 16 bit)