Research Of The Virtual Function Signal Generator And Digital Signal Processor

Virtual instrument is widely used in modern technology, industry produce and national defence. The appearance of virtual instrument makes the pale between metrical instrument and computer disappearanced, and starts a new epoch of metrical instrument. It combines computer technology, electronic technology, communication technology and metrical technology, which starts a new times of personal computer metrical instrument. So Virtual instrument is a landmark in metrical instrument development. Virtual Instrument based on LabWindows/CVI can be widely used in communication, semiautomatic technology, semiconductor, avigation, electrony, electric power and industry produce and so on.The content of this paper is about virtual function signal generator which is based on LabWindows/CVI and digital signal processor. It includes designing structure of virtual function signal generator which is based on LabWindows/CVI and digital signal processor, which include hardware and software structure, designing digital signal capture board which is based on C8051F020 and giving network measure and control based on TCP/IP and signal processor. Used LabWindows/CVI software platform and its powerful function library, simple MCU+DDS while can generator signal wave with wide channel, high precision and continuous adjustive swing, phase and frequence, the transmission function of network, Virtual function signal generator can achieve network control and signal process. Used A/D channel and I/O ports which inside C8051F020 microprocessor, Visual capture signal board based on LabWindows/CVI finishes analog signal capture, ampliation and data transmission. Signal process and display can be finished by personal computer or MCU. And by network control we can reduce hardware expenditure and simply achieve autocontrol. Finally, through all-sided test, the result shows this project is feasible and has universal usage.