The design of virtual signal generator and remote reslization
Abstract: The virtual instrument which conditioning signals is gained by some essential hardware. It takes the general-purpose computer as a platform and the signal is realized through the different measurement software, such as signal’s analyze, process and display etc. The concept and mode of traditional measuring instruments are changed, the parameters and functions can be transformed by the user, namely, "software is the instrument". With the rapid development of computer and network technology, the virtual instrument has become a developing trend of modern electronic measuring instruments.
In this paper development platform LabVIEW is introduced firstly, then the test signals of Sine, triangle, square sawtooth and arbitrary waveform is described in the virtual signal generator. The functions of signal generator are set, such as frequency, amplitude, phase, voltage bias etc. Not only output parameters can be adjusted but also the corresponding wave is acquired simultaneously in this system. The function of remote data transmission is performed by TCP/IP technology. Data is transported when the port parameters between two computers are set.
Compared with traditional machines, advantages of the virtual instrument are showed in efficiency, opening, easy using, strong function, cost-effective and operation etc. It can be used for testing of medical and engineering precision instruments.
Key words:Virtual instrument,LabVIEW, Function generator,Network Communication