针对传统绝对式光学编码器编码复杂、价格较高、不易小型化的不足, 本文提出一种新型的单码道绝对式光学编码器的编码方法, 并采用阵列图像传感器获取编码栅尺图像, 用数字图像处理技术对获取的栅尺图像进行解码和绝对位置计算。计算机仿真和实测结果表明: 本文提出的单码道绝对式光学编码器编码方法简单, 测量精度高, 对光强变化不敏感, 安装要求低, 应用前景广阔。

As the traditional optical encoder has the deficiency of coding complicatedly, high price and difficult to miniaturization, this paper introduces a new coding scheme of single-ring absolute optical encoder, and then illustrates the decoding and absolute-position calculation method of the coding grating ruler image, which is acquired through array image sensor, and processed by using digital image processing technology. The results of both computer simulation and actual measurement show that, the single-ring absolute optical encoder encodes simply, and has high measurement accuracy. And it is not sensitive to the changes in light intensity. The encoder has low installation requirements and a broad application prospect.