【摘要】 介绍了基于信号细分理论的机械传动误差采集模块部分的实现原理。给出了传动误差测量系统的整体设计,包括前置整形放大电路、误差采集模块及FIFO数据缓冲器、USB2.0传输模块、PC机等。基于CPLD芯片EPM7512AETC144设计了误差采集模块,描述了其组成部分(控制命令寄存器组、可控分频器、FIFO控制器、相差产生电路、全脉冲计数器、相差计数器等),并通过时序仿真验证了CPLD设计的正确性。该CPLD可再编程的特性方便了后续开发对采集模块的升级。更多还原

【Abstract】 The working principle of mechanical transmission error sampling module based on signal subdivision theory is introduced.The overall design of transmission error measuring system is presented,including pre-shaping and amplifying circuit,error sampling module,FIFO data buffer,USB 2.0 transmission module and PC.The error sampling module is designed based on CPLD chip EPM7512AETC144,which consists of control command register group,controllable frequency divider,FIFO controller,phase differential generation circuit,full-pulse counter,phase differential counter etc.Its correctness is proved by sequential simulation.Its programmable feature makes its upgrade convenient.更多还原