Abstract
The virtual instrument technology is a new technology which developed in recent twenty years .The core idea of virtual instruments is 'The software is the instrument'. The virtual instrument utilizes the PC's strong data processing ability, operates the computer according to the interface that the software defined, completes a series of function of the signal collecting, analyzing, processing, judging and display, and realizes the function of the instrument.
Oscilloscope is a kind of general instrument extensively used in science research and Universities. It is very necessary to develop a kind of oscilloscope to meet the requirement of scientific research and teaching in universities. The virtual oscilloscope is a kind of application of VI technology. This VI is based on computer. It combines the virtual instrument's hardware with software close to realize the stronger function than traditional instrument.
This thesis introduced the principle and the development of the oscilloscope and virtual instrument. On this basis, this thesis puts forward the design of the virtual oscilloscope scheme based on LabVIEW. The virtual oscilloscope system includes three main function parts. They are data acquisition, data analysis and output display. This thesis presents a virtual oscilloscope for the function of the module, and gives a specific design methods and text results.