The Design Of Virtual Oscilloscope Based On LabVIEW

With the development of computer technology, equipment industry is undergoing a change. The powerful processing and display capabilities of computer enhance data collection, analysis and expression of any aspect of the performance of equipment. A virtual instrument as the representative new equipment has changed the traditional instruments,it takes full advantage of computer hardware and software resources. The computer technology is integrated with measurement technology. It integrate the electronic measurement, signal processing and computer and network technology in the new instrument.This research use the data acquisition card PCI2003 of ART company and common computer as the hardware development platform and LabVIEW8.2 of National Instruments as platform to try to develop a virtual multi-functional digital oscilloscope.In addition to traditional analog oscilloscope the acquisition of waveform, display and other features, the oscilloscope can achieve the signal filtering, spectrum analysis, measurement, data storage and playback.This paper introduced research background of virtual instrument and significance and the research and progress at home and abroad. Then the virtual instrument was outlined in general, discussed the concept of virtual instruments, composition, features, development, the establishment of a virtual instrument's basic framework. Then an important part of the virtual oscilloscope - data acquisition system was discussed. On this basis, a virtual oscilloscope system is designed; this is also the focus of the paper. This section sets out the design of virtual oscilloscope, and gives the detailed design of the functional modules and the integration of the module, debug, and the system performance analysis. The results show that the oscilloscope designed to meet the general engineering test, have some practical value.