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]
出处
《医疗卫生装备》
CAS
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)
