ABSTRACT
Virtual instrument is based on computer hardware and software platform, used in industrial automation and other aspects. It is dominate by software technology, adding a small number of hardware for data processing, analysis, control, displays and other functions. Development languages of virtual instrument has not only genera programming languages such as Basic, standard C, Visual C++, also has their own proprietary software, such as NI company LabVIEW, LabWindows/CVI.
