The Research On Vibration ATS Based On The PXI Bus

In modern industry, vibration measurement and analysis are important part. With the rapid development of computer technology, measurement and control technology, and virtual instrument technology.The measurement instruments which developed from the conventional instruments to the heart focus on the virtual instruments have also quickly developed.Based on the international developing trend of measurement and control field, virtual instrument and relating application in vibration ATS (Automatic Test System) are researched in this thesis. A based PXI automatic test system is designed to solve the problem which the efficiency of products in pipelining tested in the vibration environment is low. The thesis put forward specific content of hardware and software designs.then based on the PXI device and Labview, the current automatic test system is achieved.Firstly, the current technology of vibration ATS is discussed, then the concept of this system based on the PXI is advanced. Secondly, the composition of vibration ATS is discussed and pivotal technologies on the vibration ATS are analyzed. Finally, by virtue of LabVIEW,the soft of testing and analyzing vibration data is realized. This system which using modularization program to do data acquisition, storage, processing and display can run in Microsoft Windows 2000 or XP . The signal process functions of the software include those functions as digital filter, windowing, auto-correlation function and cross-correlation function; auto-power spectrum, cross-power spectrum, frequency response function, coherence function, which based on the FFT (Fast Fourier Transfer).The virtual measurement system of vibration ATS in this thesis use data acquisition card of NI Company based on expanding slot of PXI device and LabVIEW software. This system has good expansibility and high cost performance for the products on pipelining test on vibration environment in industry.