Abstract
Virtual instrument (VI) is the combination of the computer technology and the traditional instruments technology, is an important direction in the development of instrument. With traditional instruments, the virtual instrument technology means that on the general-purpose computer platform which contains data acquisition device, according to needs, you can construct various measurement system efficiently . For most users, the main work is a software design. The virtual instrument technology breaks through the traditional instruments, can take many signal processing methods into measurement conveniently, and creates conditions for automatic measurement and network measurement.
LabVIEW is a programming language based graphical of virtual instrument software development tools, this paper expounds LabVIEW graphical programming language used to develop virtual design of the digital filter process. Through the research of digital filter algorithm IIR,we can get the design scheme of the IIR digital filter. Through the simulation experiments show that the filter can filter out the noise of the signal, we know that the effect of the filter is good and it is compatible with other large virtual electronic measurement system to complete measurement requirements in different environment.
