Acoustic-electric dual-mode fusion measurement method for process parameters of two-phase flow
A technology of process parameters and measurement methods, which is applied in the direction of fluid velocity measurement, measurement devices, velocity/acceleration/impact measurement, etc., which can solve the problems of difficulty in accurate parameter testing, complex flow process of multiphase flow, and many parameters to be measured.
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[0075] Conductivity sensor structure such as figure 1 As shown, it consists of six annular electrodes arranged in the axial direction, among which 1, 6 are excitation electrodes, and 2, 3, 4, 5 are measurement electrodes. The method of current excitation voltage measurement is adopted. The excitation signal is a square wave signal with a frequency of 20kHz. By injecting a constant current into electrode 1 and grounding electrode 6, a stable electrical measurement field can be formed between electrodes 1 and 6. The potential difference between them is proportional to the fluid impedance distributed therebetween, and the average resistivity of the two-phase flow between them can be obtained by measuring the potential difference between the electrode pair 2-3, the electrode pair 3-4 and the electrode pair 4-5 respectively. The impedance of the oil-water two-phase flow has a corresponding relationship with the phase distribution, so the phase holdup can be measured by measuring th...
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