基于CPLD教学CT实验仪数据采集系统的设计与实现

教学CT研制的目的，是为了更直观地演示CT扫描的全过程，其中数据采集系统的设计是整个教学CT系统研制的重点之一．文中主要介绍了CD-50BG教学CT实验仪数据采集系统的设计与实现，利用CPLD器件高集成度等特点，将其应用于数据采集系统的设计中，以达到减小系统体积、提高系统可靠性的目的；并针对CD-50BG教学CT机在采集数据过程中数据易丢失的现象，对数据采集系统进行了改进性的设计，增加了FIFO缓冲电路，在高速的数据采集过程中减少了数据的丢失，提高了数据传输的质量．

Study and Design on Teaching Experiment Instrument of CT Data Acquisition System Based on CPLD

The purpose of developing Teaching Experiment Instrument of CT is to demonstrate the whole process of CT scanning more intuitively, thereinto the design of data acquisition system is one of the emphases in the developing of the CT system. This paper mainly introduces the design and implement of the data acquisition system of CD - 50BG, using CPLD apparatus which have the characteristic of high integration, in the design of data acquisition system to achieve the target of minishing system bulk and improving system reliability. Aiming at the data loss of CD - 50BG during acquiring data, the data acquisition system is reformatively redesigned, the data loss in the high speed data acquisition process is reduced so that the stability of transmission has been improved by using FIFO.