摘要
基于探地雷达数据采集系统对数字化集成化的需求,提出了一种基于FPGA的数据采集系统的设计方案,用于采集探地雷达回波信号。FPGA直接通过控制精密延时芯片MC100EP196对采样脉冲进行延时调整,控制采样脉冲的延时步进,系统最大采样率理论值达到100 GS/s,并且时窗可以任意调整。给出了设计方案,对系统的工作原理和特点进行了详细的说明。通过与示波器对比以及分析采集测试效果图,得到稳定有效的数据,实际采样率达到20 GS/s,证明了系统的可行性。
In view of the requirement of data acquisition system of ground penetrating radar （GPR） for digital integration, this paper proposes a design scheme of data acquisition system based on FPGA for GPR echo signal acquisition. The FPGA is used to perform delay adjustment for sampling pulse by controlling directly sophisticated delay chip MC100EP196 to control sampling pulse delay step.The maximum theoretical value of system sampling rate is up to 100 GS/s,and can adjust the time window.The design block diagram is given, and the operating principle and characteristics of the system are described in detail.By comparing with the oscilloscope and analyzing acquisition test results,the stable and effective data are obtained, and the actual sampling rate is up to 20 GS/s,which proves the feasibility of the system.
作者
程昌彦
李太全
CHENG Chang-yan LI Tai-quan(School of Physics Science and Opto-electronic Engineering, Yangtze University, Jingzhou Hubei 434020, Chin)
出处
《无线电工程》
2017年第4期28-30,共3页
Radio Engineering
基金
国家自然科学基金资助项目(41474117)
