Design of virtual digital oscilloscope based on LabVIEW

Electrical and electronic experiment teaching is an indispensable and important part of engineering teaching. Oscilloscope is an indispensable experimental instrument in the teaching of these experiments, which is used to measure the electrical signals in the experimental process for analysis and processing. In this paper, a dual-channel virtual oscilloscope was designed based on the PC 16-bit sound card, which could correctly collect electronic signals within ±1V. Through LabVIEW graphical programming and multi-threading technology, these functions such as waveform display, channel selection control, parameter measurement and display, waveform storage and playback were realized. The innovation of this design is that it could automatically generate experimental report, simplifying the tedious operations such as drawing waveforms and filling parameters, finally quickly getting illustrated experimental report. From the test results, it can meet the requirements of daily experimental teaching, and it is of great significance to improve the quality of electrical and electronic experimental teaching.