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The Research of Dynamic Measurement Uncertainty Evaluation on Coal Mine Pump and Compressor Testing System Based on Virtual Instrument

Author: JiaoShanLin
Tutor: WangGuiMei
School: Hebei University of Engineering
Course: Mechanical Design and Theory
Keywords: pump air compressor labVIEW dynamic measurement uncertainty unascertained theory
CLC: TP274
Type: Master's thesis
Year: 2011
Downloads: 65
Quote: 0
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Abstract


The pump and the air compressor are the important equipment for the safety production of coal mine. In order to ensure the safety production, we should check and test their comprehensive performance regularly according to the regulation, to overhaul and instead in time and eliminate safe hidden dangers. The traditional testing methods mainly use the pressure gauge, thermometer, power meter, speed instrument such as instruments to measure the relevant performance parameters of equipments, then the testing datas will be move into the computer to carry on the performance curve fitting and produce the testing report. This method’s efficiency is low, the precision is bad, the limitation of testing range and testing datas are big, the provided technical datas cannot meet the requirements for the safety production of modern coal mine.In view of the above questions, this paper applies the virtual instrument technology to the performance testing of pump and air compressor and develops a comprehensive performance testing system which integrates the pump and air compressor. The system takes software development environment—Labview as the platform, integrated the equipment’s performance parameters testing, the computer automatically completes data collection, transmission, analysis, processing and storage and so on, and can carry on the performance curve fitting and produce the testing report on the spot. In the paper, it detailed introduces the development process of single equipment testing system, including mainly the determination of overall plan, the design and development of procedure front panel and diagram, and the realization of performance testing fuctions and so on. Finally, it integrates the single equipment testing system. It takes USB interface technology to communicate between the data acquisition card and the computer, has the characteristics such as plug and play, convenient and efficient and so on. Compared with traditional test instruments, it improves the accuracy of the testing and development efficiency, and reduces labor intensity.At the same time, the paper applies the unascertained theory to evaluate the uncertainty of dynamic measurement of testing system, develops the mathematical model of dynamic measurement uncertainty evaluation based on unascertained theory.It not only may provide the dynamic performance index of testing system under the practical application environment, but also can provide the quantitative index and basis for reducing the effect of various factors to the measurement results. The application ofdynamic measurement uncertainty evaluation method can fully consider the measurand time vary, randomness and relevance, as well as the dynamic of testing system itself.It provides the basis for scientific evaluating the testing system and enhancing the validity of testing system.

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CLC: > Industrial Technology > Automation technology,computer technology > Automation technology and equipment > Automation systems > Data processing, data processing system
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