用微型计算机控制锁相环(PLL)可对计量光栅信号进行数字倍频 用这种挂 术产生的角度定标脉冲去量度齿轮侍动链误差比用时钟脉冲夸理，布助于蓰壹考粤 仪器的动态检测精度．-Phase-locked loop with a micro-computer control (PLL) can be grating on the measurement of digital harmonic signal generated with this hanging point calibration t