光电轴角编码器,又称光电角位置传感器,是电气传动系统中用来测量电动机转速和转子位置的核心部件。文章分析光电编码器四倍频原理,提出了一种基于可编程逻辑器件FPGA对光电编码器输出信号倍频、鉴相、计数的具体方法,它对提高编码器分辨率与实现高精度、高稳定性的信号检测及位置伺服控制具有一定的现实意义。 Photoelectric shaft encoder, also known as photoelectric angle position sensor, is the core component of the electric drive system used to measure the motor speed and rotor position. This paper analyzes the principle of quadruple frequency of photoelectric encoder and presents a method based on programmable logic device FPGA to multiply, phase and count the output signal of optical encoder. It improves the resolution of encoder and realizes high precision and high Stability of the signal detection and position servo control has some practical significance.