基于声卡的虚拟示波器和虚拟信号发生器的设计与测试

摘要

This article describes a computer＇s sound card instead of using expensive professional data acquisition card,LabVIEW software development with multi-function virtual oscilloscope and a virtual signal generator.The main functions of virtual instrument waveform display,trigger control,channel selection control,parameter measurement,spectrum analysis and waveform storage and playback,the user can at any time measurement data analysis and processing,and real-time observation and analysis of experimental results.%介绍了一款利用计算机的声卡代替价格较贵的专业数据采集卡,借助LabVIEW软件开发的多功能虚拟示波器及虚拟信号发生器。该虚拟仪器的主要功能有波形显示、触发控制、通道选择控制、参数的测量、频谱的分析和波形的存储和回放等,用户可以随时进行测量数据的分析处理,并实时观察和分析实验结果。