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A simple flow regime detection method of gas-liquid two-phase flow is presented, used in mini-pipes. First, the capacitance signals are obtained, and some simple statistics eigenvalues, such as mean value, standard deviation, total energy, average amplitude, zero-crossing rate and probability density function, are analyzed and used to identify the flow regimes. The principal component analysis (PCA)...
Based on wavelet transform and higher-order spectrum technique, a novel method was proposed to monitor the flow states of gas/liquid two-phase flow by analyzing the differential pressure signal. Firstly, the differential pressure signal was decomposed into many scaling functions with different frequencies by using wavelet multiresolution technique. The high-frequency noise of the signal was eliminated...
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