The output from incremental optical encoders and from many other types of measurement devices is known as a “quadrature” signal. A quadrature signal consists of two square waves 90° out of phase. The input channel on our encoder interface board count

光电编码器4倍频脉冲计数，绝对实用，其中包括A B正转计数和 A B 翻转计数 精度准确-4x optical encoder pulse count

光电编码器计算机串口采集检测程序 VB环境-Optical encoder computer serial acquisition VB environment testing procedures