基于LabVIEW的双通道虚拟示波器设计

摘要

本文基于LabVIEW软件,采用模块化的设计思路,开发了双通道虚拟示波器.软件设计主要包含通道选择模块、时间和幅值分度调节模块、触发耦合模块、参数测量模块及信号发生模块.通道选择模块可以选择两个通道单独显示、两个通道同时显示以及两个通道叠加显示,时间和幅值分度调节模块可以分别调节示波器的时间分度和幅值分度.通过信号发生模决产生仿真信号,参数测量模块完成波形的各种参数测量.仿真结果表明该系统基本实现了传统示波器的功能,且测量精度和可靠性等性能指标优于传统仪器.具有较强的可操作性和可维护性.%According to the designing idea of modularization, a virtual dual-channel digital oscilloscope based on LabVIEW is developed. The software system includes modules of channel selecting, time and amplitude indexing regulation, triggering and coupling, parameter measuring and signal generating. In channel selecting module, signals can be displayed individually, simultaneously or superimposedly. Simulation signal is produced via module of signal generating and all kinds of parameters can be measured via parameter measuring module. Simulation results show the virtual oscilloscope has realized the functions of traditional oscilloscope and performs better in precision and reliability. It has a high manipulability and maintainability.