X射线法三相流测量技术研究-信号与信息处理专业论文.docxVIP

英文摘要 Subject ：Research On Measurement Technology Of Three-phase Flow by X-ray Specialty：Signal and Information Processing Name：Sun Liang Liang（signature） Instructor：Dang Ruirong（signature） ABSTRACT In the petrol industry, the underground flow information has great significance in oilfield rational exploitation, reservoir optimize management and formulation and adjustment of mining plan, etc. There are so many measuring equipments for multiphase flow, however, there is almost no instrument using in oil, gas and water three-phase flow measurement in the underground. The dual-energy X-ray method is used in measuring phase fraction of oil, gas and water three-phase flow in this paper, which is to develop phase fraction measuring system used in the underground. Measuring the phase fraction of oil, gas and water by dual-energy X-ray method in this paper, we combine the interaction law between rays and matters with the common types of X-ray tube. Choose the Mo target fluorescent tubes of characteristic spectrum for 17.44Kev and W target fluorescent tubes for 58.87keV to complete the development of the measurement system. The main research work is concentrated in X-ray occurring and probing system hardware circuit. The X-ray occurring system hardware circuit mainly includes PWM pulse width modulation drive circuit, single-ended fly-back converting circuit, step-up transformer, double voltage rectifier circuit, and filament constant current power supply circuit of X-ray tube. The X-ray probing system hardware circuit mainly includes power supply circuit of detector, the middle-front analog signal processing circuit of multi-channel analyzer, the peak-holding circuit, the cross-peak detection circuit and the DSP peripheral circuit. At last, test the measuring system in the indoor test platform, the results show that the absolute error of every phase is small, Meet the requirements of the actual measurement. Key words ： Three-phase Flow X-ray High Voltage Power Supply Mult