本文设计了以PC 机为上位机、AT89C51 单片机为下位机，并辅之以传感器、变频器以及相关接口部件的二级集散压力控制系统。着重介绍了基于TLC2543 单片机的数据采集与处理系统。总结了基于单片机的过程控制系统的优势。关 键 词：过程控制，单片机，数据采集Abstraet：In this paper, we design a Distributed Control System, which is composed by epigyny computer, hypogyny singlechip 89C51, and other assistant equipments, such as sensor, transducer. Putting the emphasis on the introduction of data collecting and disposing system, which is based on the singlechip TLC2543. In the end, we give a summarize of the advantages of the Process Control System.Key Word: Process control, Single chip, Data collecting