传统光电编码器防震动抗干扰电路的优化

The Advantages of Traditional Photoelectric Encoder's Quake-proof Interfere Electric Circuit

分析了光电编码器在震动,有干扰情况下产生误计数的原因。并结合传统光电编码器防震动抗干扰电路的弊端,提出了更好的电路的设计方案。模拟了光电编码器在机械振动下的干扰和电磁干扰下产生的6种典型干扰。重新分析了干扰产生的原因,并提出最终解决办法:首先通过软件对输入信号进行采样处理,对于满足预定宽度的脉冲才进行一次翻转。而这个预定宽度可根据软件进行设定,以此达到去除电磁干扰的目的。再通过分析A、B两相的波形得出合理的逻辑式:正向计数脉冲=A↓∩B。反向计数脉冲=↓∩B来产生计数脉冲。

In this paper, we analyze the reasons of the error caused by the photoelectric encoder in the vibration and interference. And combined with the disadvantages of the traditional photoelectric encoder anti vibration and anti interference circuit, the design scheme of the circuit is put forward. In this paper, 6 kinds of typical interference caused by the interference of the photoelectric encoder in the mechanical vibration and the electromagnetic interference are simulated. The reason of the interference is analyzed and the final solution is put forward. Firstly, the input signal is sampled and processed by the software, and the pulse of the predetermined width is met. and the predetermined width can be set according to the software. In order to achieve the purpose of removing electromagnetic interference. Through the analysis of A, B phase waveform obtained reasonable logic： positive counting pulse =A↓∩B. reverse counting pulse= A^-↓∩B.