The Dynamic Testing For Parameters Of Hydraulic System On Construction Machinery

This dissertation discussed how to use virtual instrument (VI) to carry on the dynamic testing for hydraulic parameters. Through analyzing the key technology, including data acquisition and anti-interference technique, we designed a testing instrument based on VI technology, and then introduced the hardware design in the test system, including the choice of flow sensor and pressure sensor, the theory of PCL818HG and PCLD8115. Moreover, we gave the function fulfilled in the software. Finally, system function was validated on the CA25D vibratory roller, and the result was accurate.This reconfigurable system employed highly-integrated module design. By appropriate sensors, it can get dynamic pressure, flux and temperature in most construction machine hydraulic systems, and provide reliable evidence for hydraulic system in optimization design and fault diagnosis.