绝对式光学编码器串行编码方法的研究

针对传统绝对式光学编码器各编码码道沿径向分布、结构复杂的缺点,提出了一种绝对式光学编码器的串行编码方法。在码盘上仅刻划一圈存储多位二值信息的编码码道,沿码盘圆周方向按一定位置布置的光敏元件并行读取的二进制数具有唯一性,对此二进制数查表译码,就可以实现绝对位置测量。与传统绝对式光学编码器相比,码盘直径小、光学图案简单,有利于绝对式编码器实现小型化和提高精度。

Research on serial encoding method for an absolute optical encoder

The code tracks of a traditional absolute optical encoder are placed radially and the structure is complicated.The presented serial encoding method for an absolute optical encoder is different from the traditional encoding method.The code disk has a single code track where multi-bit binary information can be carried.The exclusive binary number is read by light detectors placed peripherally against the code disk.Absolute positional coordinate is indicated by decoding the binary number in a special look-up table.The serial encoding method can reduce the diameter of the code disk and simplify the optical pattern,in favour of miniaturization and high precision of the absolute encoder.