基于SOPC系统的虚拟示波器设计  

Design of virtual oscilloscope based on SOPC system

作　　者：杨进宝[1] 刘让周[2] 

机构地区：[1]湖南师范大学工学院,长沙410081 [2]湖南大学电气与信息工程学院,长沙410082

出　　处：《电子测量技术》2011年第3期75-78,94,共5页Electronic Measurement Technology

基　　金：湖南省教育厅科学研究项目(10C0924)

摘　　要：以LabWindows/CVI为开发平台,利用嵌入NiosⅡ软核的FPGA构成的SOPC系统,设计了1种双通道虚拟示波器,详细阐述了虚拟示波器数据采集电路的设计方法、信息处理部分电路设计方法、SOPC系统的构建方法、USB通信接口的设计方法,完成了基于μC/OS-Ⅱ的NiosⅡ软件和基于LabWindows/CVI的虚拟示波器上位机软件设计。实际测试结果表明,该虚拟示波器能够达到80MHz的实时采样速率,具有20MHz的模拟带宽,输入范围可达±10mV～±200V,能够实现多种触发方式,界面友好,操作简便。A dual-channel virtual oscilloscope based on LabWindows/CVI is designed by the SOPC system that composed of FPGAs embedded Nios Ⅱ soft-core.The data acquiring circuits and the information processing circuits of virtual oscilloscope are designed,and its SOPC system is constructed and its USB communication interface is projected.The virtual oscilloscope＇s software based on LabWindows/CVI and μC/OS-Ⅱ is designed.Testing results show that the virtual oscilloscope＇s sampling rate is 80 MHz,its analog bandwidth is 20 MHz and its input range is from ± 10 mV to ± 200 V.It has many triggering ways,and its interface is friendly and easy to operate.

关 键 词：虚拟示波器 SOPC系统 LABWINDOWS/CVI FPGA NiosⅡ 

分 类 号：TP271.4[自动化与计算机技术—检测技术与自动化装置]