Research and application of virtual instrument based on PCI bus

Intelligent, high precision and real-time of measure and control system is the target which was desirous to actualize all the time. A method of High performance virtual instrument based on the coalescent between PCI bus and virtual instrument was developed, that increase test speed, precision and intelligence, reduce cost of system and improve the rate with quality and price. PCI bus protocol and windows driver was also investigated in depth by combining VI technology and high-speed DAQ card based on PCI bus designed successfully. High effect finally was gained when the DAQ card is applied to actual measure and control system. As a result, the technical parameters of precision and real-time quality in DAQ card are all accord with the design requirement.