基于DSP和CPLD旋转机械振动实时数据采集系统的实现

The Implementation of Rotating Machine Vibration Signals Real-time Acquisition System Based on DSP and CPLD

通过采用硬件与软件结合的锁相环技术和双缓冲技术,用CPLD、AD和FIFO实现一种时序严格、由硬件自动完成数据采集的电路,能够自动跟踪转速信号的变化,实现整周期采样。克服了软件采集时在转速变化时,相位不同步的问题,从而为DSP的频谱分析奠定了基础。

The phase-locked loop and double buffer technique adopt the method which, combines hardware with software. A circuit which has a strict time order and can automatically acquire data is realized by using CPLD, AD and FIFO. This research overcomes the deficiency of signals acquisition by software; the phase can not be kept consistent when rotational speed changes. The spectrum analysis is based on the design.