光电轴角编码器是一种先进的数字测角传感器，利用光电轴角编码器进行测速具有高精度、高分辨率、高可靠性等优点，可以满足现代精密伺服系统的需求。首先介绍了光电编码器的原理及其应用；然后通过对国内外各种测速方法的介绍和比较，分析各种方法的优缺点和适用范围；最后针对光电轴角编码器测速方法某些关键技术，也对其未来的发展趋势进行了扼要阐述。

Photoelectric shaft encoder is an advanced digital angle transducer. Velocity measurement can meet the demands of modern precision servo control system using photoelectric encoder with the advantages of high precision, high resolution and high reliability, therefore, the research has been a popular topic. we introduce the principle and application of photoelectric shaft encoder. Then the applicability, advantages and drawbacks are presented by introducing and comparing various velocity measurement methods. At last, the development trend of velocity measurement methods with photoelectric shaft encoder is prospected.