Design Of Data Acquisition System Based On PCI Bus

The data acquisition is the key of the test system, and high-speed data acquisition is ofgreat significance to improve the overall system performance. In the field of dynamic testing,often require high-speed real-time data collection in the field. PCI bus architecture is simple,low cost, and the technology is mature, mainstream bus system is in the field of dataacquisition.The design of PCI-based data acquisition system design, first collected datathrough the PCI bus transfer to your computer’s memory, and then proceed to the latter part ofthe analysis and processing, high-speed data acquisition and achieved good results.Based on the design of the data acquisition system in the past and learn from theimplementation of high-speed data acquisition system based on PCI bus and Design andImplementation of a weak signal detection function in the program, so that the system canalso be weak signal high-speed acquisition, storage and processing.This paper introduces the development status of the data acquisition and weak signaldetection technology, the overall design of the program and then the PCI data acquisitionsystem, and the hardware circuit, a detailed design and implementation of control logic anddriver. And in-depth study of the principles and methods of the PCI bus transfer system basedon comprehensive consideration of factors such as performance and cost, determined with adedicated bus protocol chip PCI9054PCI bus interface to design and FPGA design to controlthe entire circuit timing. Hardware implementation section details the data acquisition, PCIbus interface design, and PCB design; software implementation section describes the FPGAcontrol logic design-driven design and application software design. PCI bus interface design,FPGA timing logic is the emphasis and difficulty in the design. Finally, the performance ofthe system was tested, the results show that the system performance to meet the requiredspecifications.