基于DDS的程控多模式脉冲发生及捕捉板卡设计与实现  

Design of Programmable Pulse Generating and Capture Board of Multimode Based on DDS

作　　者：马睿[1] 胡晓吉[1] 

机构地区：[1]中国电子科技集团第15研究所加固计算机产品事业部计算机应用,北京100083

出　　处：《计算机测量与控制》2012年第9期2510-2512,2522,共4页Computer Measurement &Control

基　　金：中国人民解放军总装备部十二五预研项目基金(513160901)

摘　　要：脉冲发生及捕捉板卡(简称脉冲板)可实现多模式脉冲发生和捕捉计数的功能;采取PCI接口芯片和FPGA配合方案完成与上位机的通讯;采用直接数字式频率综合技术合成目标频率脉冲信号实现脉冲发送功能;采用光电隔离技术捕捉外部脉冲信号实现脉冲捕捉功能;对软硬件进行加固实现高精度、高可靠性、强实时性、可扩展性且能抗恶劣作战环境的军事用途脉冲板。依据国军标相关要求检验脉冲板,并采用脉冲板自环形式测试,结果显示其技术指标有新的突破:步进值可达到1‰Hz,频率精度可达0.01%。Pulse generating and capture board （pulse board for short） has the function of pulse generating, pulse capture and counting. The method of PCI interface technique cooperating with FPGA is used to communicate with PC; Generating pulse of aimed frequency bases on DDS technique; Photoelectric isolation technique is used in the process of pulse capture pulse; By reinforcing software and hardware the board can be anti-adverse environment, also can achieve high precision, reliability, real time and expansibility, so it can be widely ap plied to military field. Reiterative tested in the way of feedback and display through peripheral equipment, the board is validated up to the National Military Standard and it has breakthroughs in technical specifications： the resolution of pulse reaches 0.01Hz and precision can he up to 0.01 percenl.

关 键 词：DDS AD9851 脉冲信号 CPCI板卡 FPGA 

分 类 号：TP303[自动化与计算机技术—计算机系统结构]