基于CPLD和双SRAM的发电机组状态监测系统数据采集卡设计

Data acquisition card for monitoring system based on CPLD and double SRAM

介绍了基于CPLD[1]和双SRAM的发电机组状态监测系统数据采集卡的设计。该数据采集卡采用了两片四通道同步采样芯片AD7865[2],能实现八通道信号同步采样。为了实现对信号的任意长度的连续采样,采用了双SRAM交替存储机制[3],确保不会造成瞬态数据丢失,提高了监测的可靠性。采集卡的整个工作过程由CPLD协调和控制。

This paper presents a data acquisition card for monitoring system of generating units based on CPLD and double SRAM. This can realize synchronous sampling of 8-channel signals with two AD7865 chips. The signals can be consecutively sampled using the alternative storage method to enhance monitoring reliability. All of the working process are coordinated and controlled by CPLD.