Abstract：In order to improve the reliability and applicability of performance testing system for centri-fugal pumps and enhance the automatic degree of testing process at the same time, the structure of a kind of general automatic testing system was constructed in this study. Programmable logic controller(PLC)or data acquisition card was selected as the sensor for signal sampling and the controller for the pumps and valves in the system. Moreover, a touch screen was used as the human-machine interaction. The system software was developed by using configuration software, and other functional modules written with Visual Basic 6.0 to conduct performance curve fitting and generate a test report, etc were embedded. As a result of these, the testing system not only can sample a variety of sensor signals, but also can support various kinds of data acquisition equipments,making the system more flexible and app-licable. In the present work, the composition scheme of the testing system, software programming, curve fitting principle and the realization of test control hardware were described. The obtained results show that the testing system has been greatly improved in degree of automation, communication ability, and performance of human-machine interaction as well as portability because comprehensive application and development of generalized controllers, configuration software and Visual Basic function modules were involved. The proposed system could be promising for testing and maintenance of pump equipment and for design of industrial automated production system.
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