Study Of Intelligent Testing System Of HWF-5 Reciprocating Tribometer

The shock absorber is a key part in automobiles or motorcycles. As the flexible part to join the suspension and the wheels, it has the functions of buffer and vibration isolation, which will directly affect the driving equability, comfort and safety. The key parts in the shock absorber are the friction couples - guide sleeve and piston rod, the failure of these two parts will lead to the failure of the shock absorber. Therefore, it is very important to measure and test the dynamic tribological properties, to analyze the wear mechanism and to increase the service life of the the guide sleeve and piston rod in the shock absorber.In this thesis, computer technology, automatic testing technology and measuring technology were successfully intergrated in the developed intelligent testing system for the HWF-5 reciprocating tribometer. It is of great significance for the research of guide sleeves in the shock absorber.Firstly, a general intelligent testing system was built for the HWF-5 reciprocating tribometer based on the analysis of the structure and the function of reciprocating movement of the shock absorber in the thesis. Then, the mathematic model for the reciprocating movement was established. The intelligent collection, transmission, processing of the testing signals and the anti-jamming technologies of the system were presented. Finally, the functions of the developed intelligent testing software, the used techniques and the system performances were introduced in detail.In the developed system, the data acquisition was performed by using a PCI-9111 multi-function A/D data acquisition card and a CP-134 multi-function serial port data acquisition card; The functions of real-time collection, online analysis, saving and display of the signals of friction force, friction coefficient, load, line speed, and temperature were performed with the supports of the developed software programmed by VB6.0, Visual C++6.0 and the corresponding interface circuits and the hardware. Furthermore, the system can automatically adjust the speed and load according to the set processes during the test. Therefore, the reciprocating test process can be real-timely and quantitatively evaluated and measured. The software has friendly interfaces.