一种基于FPGA控制的多路并行数据采集设计方法  

Design Method for Multi-channel Parallel Data Acquisition System Based on FPGA

作　　者：马航[1] 季振宇[1] 史学涛[1] 尤富生[1] 付峰[1] 刘锐岗[1] 董秀珍[1] 

机构地区：[1]第四军医大学生物医学工程学院,西安710032

出　　处：《医疗卫生装备》2014年第2期1-3,7,共4页Chinese Medical Equipment Journal

基　　金：国家自然科学基金青年项目(81101167);陕西省科技计划项目(2012KJXX-22);国家科技支撑项目(2012BA119B01)

摘　　要：目的:为生物电阻抗成像设备设计出一个高精度、高速率,并能进行同步采集的多路信号采集模块。方法:通过在FPGA上定制一个Nios II软核来作为系统的微控制器,然后通过对FPGA编程实现对多路A/D并行采集的时序控制,最后通过UART总线实现采集板与上位机之间的数据传输。结果:该系统成功地实现了对4路A/D转换器的并行控制,并实现了在100 Hz^100 kHz激励下对64路信号进行同步采集及初步的处理。结论:该设计方案达到了研究目的,能够满足EIS成像系统的数据采集需求。Objective To design a multi-channel data acquisition module with high quality and high speed, which can achieve synchronous acquisition for bioelectrical impedance imaging equipment. Methods A Nios II soft-core CPU was customized as the micro-controller of the system by FPGA, then FPGA was coded to achieve the timing control of multi- channel A/D. Finally, UART was used to achieve the data transmission between signal acquisition board and upper computer. Results The system actualized parallel control of 4-channel A/D convertors and the collection and processing of 64-channel singals when the excitation source＇s frequency was between 100 Hz and 100 kHz. Conclusion The design can meet the demand of data acquisition in EIS. [Chinese Medical Equipment Journal, 2014,35 （2） ： 1-3,7]

关 键 词：FPGA NIOSII软核 多路并行 数据采集 

分 类 号：R318[医药卫生—生物医学工程] TP274.2[医药卫生—基础医学]