In this paper, The Grey code of absolute rotary encoder converting to Binary code by PLC is introduced, which realize measuring gate opening.

介绍了绝对值型旋转编码器通过PLC将格雷码转换成二进制码，实现闸门开度测量的方法。

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Encoding system of absolute encoder generally USES natural binary code, Gray code, Gray-excess-code and so on.

绝对式编码器编码码制通常采用自然二进制码、格雷码、格雷余码等。

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The characteristics of binary code disc and cyclic code disc are analyzed, and a new design of absolute code disc based on three regional models is then presented.

分析二进制码盘、循环码盘的特点，提出一种新型的具有三种区域模式的绝对武码盘设计方案。

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