Developed Based On The Argument Of The Virtual Instrument Control Data Acquisition System. Labwindows / Cvi Environment

The thesis studies a multi-signals data acquisition, supervisory and control system. In Labwindows/CVI, A approach control data acquisition system based on virtual instrument is developed. The system includes three parts: (1), exterior bus and high frequency signal data acquisition and signal processing; (2), PC-DAQ data acquisition. It solves some problems about continuing data acquisition, data stream storage and multi-tasks disposal; (3), Real-time monitor work-state of twelve relays .This thesis expounds the system principle, structure and form. It introduces that high-frequency data acquisition method bases on the common GPIB bus .To data acquisition based on PC-DAQ, it makes theoretical analysis in signal-processing grounded signal source and measurement, data acquisition principle .avoiding pseudo-signal and multi data acquisition etc.... It also solves technical difficult problems about continuing data acquisition, data stream storage, multi-thread, digital filter ,query data and waveform display etc... In addition, it studies a supervisory method on monitoring work-state of twelve relays .Approach control data acquisition and monitoring system which is proved by environmental experiment, transportation experiment, system test, It is test nicety , steady reliability ,anti-jamming . It changes the past measurement system with instrument independent, hand-operation, hand record data, low automatization operation into measurement system with few instrument, high automatization .