Automatic Data Acquisition System in Wheel-Rail Monitoring Test Bench

A new automatic data acquisition method, which uses a combination of single chip microcomputer and data acquisition card, was applied in this system. Single chip microcomputer captured the signal of photoelectric switches and delivered the information to upper computer by serial communication. The velocity of the moving load was obtained by photoelectric switch signal. The data acquisition program of upper computer was written by MATLAB instrument control toolbox and data acquisition toolbox. The data acquisition function of data acquisition card was triggered by the upper computer automatically. Testing data show that this system could automatic collect data of test bench stably. This system also shows high efficiency and reliability.