基于LabVIEW的虚拟波形发生器和示波器的设计

Design of Virtual Waveform Generator and Wave Oscilloscope Based on LabVIEW

采用模块化的概念,基于LabVIEW图形化虚拟仪器开发平台,设计了一款虚拟波形发生器和示波器系统,用于普通实验室中的信号检测及处理。该虚拟波形发生器能产生正弦波、三角波、方波、锯齿波等波形,频率动态范围宽且可调。本系统包括模拟信号发生模块、处理分析模块、存储读取模块和显示模块。其中,测试对象由模拟信号发生模块产生,该模块主要由波形发生器和通道选择器组成;处理分析模块由滤波、频谱分析构成。最后进行系统测试,经测试可知,该虚拟示波器运行稳定、性能良好,能满足普通实验室的一般要求,实现了示波器的基本功能,有较强的实用性。

Based on LabVIEW graphical programming virtual instrumentation,adopting the concept of modularization,Virtual Waveform Generator and Wave Oscilloscope used to detect and process the ordinary laboratory signals is designed in this paper.The Virtual Waveform Generator can generate Sine wave,triangle wave,square wave,teeth of a saw wave etc.Dynamic range of frequency is wide and can regulate.It includes four blocks,waveform generator blocks,signal analyzing and processing blocks,data collection and storage blocks and display blocks.The testing objects are produced by the Virtual waveform generator including waveform generator and channel selector.