Pump's Performance Testing And Fault Diagnosis System Based On Virtual Instrument

Through to research of the mineral water pump performance parameter test of principle and the method, the advanced virtual instruments technology had been introduced into the system, used the computer rich software and hardware resources fully, made the function of the test system integration and the test process intellectualization. According to the actual need, through to the equipment fault diagnosis basic process and analysis of the water pump common fault and the mechanism, the paper had determined using the research method and the ideas of the wavelet neural network for the fault diagnosis of the water pump.This article had determined overall design scheme of the virtual instrument test system hardware based on the analysis of the water pump performance test principle and the hardware system demand, and combination of system testing requirements, had determined the sensors needed by the system, designed the conversion electric circuit, chose USB6221 for the data acquisition equipment. In the course of software system the research and development, in accordance with the mine pump test requirements in "AQ1012-2005 security check test norms of the main coal mine drainage systems ", with needs of the software system analyzed , and had determined the system software development platforms and software development models, then functions of software system had been divided, and flow chart and structure chart of the software system were designed. In this foundation ,the system took the LabVIEW language as a foundation, and had developed the water pump performance test system using the modularization and hiberarchy design idea. In the some of the pump fault diagnosis , the article had determined using virtual instrument technology to acquire and manage pump vibration signals, and taking advantage of wavelet packet energy feature vector extraction and BP neural network pattern recognition methods and ideas based on the analysis of the pump fault mechanism. At the same time, the article had determined methods of calling MATLAB wavelet and neural network toolbox using MATLAB Script node in the LabVIEW in order to put forward ways of pump fault diagnosis.Finally, the article had carried out functions checkout to the virtual instrument test system of water pump performance parameter in the laboratory, and the measured result data had been made the relevant analysis for the error of virtual instrument test system. And then the conclusions were drawn ,which the indicators of the test system met the testing requirements of the pump.