ICA and SVM-based gas-liquid two-phase flow pattern identification method

The invention discloses ICA and SVM-based gas-liquid two-phase flow pattern identification device and method. The ICA and SVM-based gas-liquid two-phase flow pattern identification device comprises a standard Venturi tube, a differential pressure transmitter 1, a differential pressure transmitter 2, an AD converter and a computer. The differential pressure transmitter 1 is arranged at a position with an angle of 45 degrees above the vertical section of the Venturi tube, the differential pressure transmitter 2 is arranged at a position with an angle of 45 degrees below the vertical section of the Venturi tube, two paths of differential pressure signals measured by the differential pressure transmitter 1 and the differential pressure transmitter 2 are input to the computer by means of the AD converter. The ICA and SVM-based gas-liquid two-phase flow pattern identification method comprises the following steps: firstly, measuring two paths of differential pressure signals by applying the differential pressure transmitter 1 and the differential pressure transmitter 2, then separating the two paths of measured differential pressure signals by applying an ICA method to obtain two paths of separative signals, determining the sequences and the phase of the separative signals according to a coefficient of association, then extracting flow pattern identification characteristic parameters of two phase flows, and finally, inputting the extracted normalized characteristic parameters into a support vector machine as a training sample set for performing training to obtain a flow pattern identification model. The flow pattern identification method is simple and easy to realize and good in instantaneity.