A method and a device for measuring component fractions in a multi-phase flow

摘要

A method for measuring component fractions in a multi-phase flow in a pipe (101, 201), the components forming conductive and/or non-conductive regions in the multi-phase flow, the method comprising the steps of collecting, from an Electric Inductance Tomography (EIT) system (310) with a plurality of electrodes (121, 131, 220) arranged evenly at the periphery of a cross-section of the pipe (101, 201), resistance measurement data and capacitance measurement data indicative of different areas of the cross-section of the pipe (101, 201), collecting, from a Gamma Ray Tomography (GRT) system (320) with at least two gamma source-detector pairs (141-142, 241-242) arranged evenly at the periphery of a cross-section of the pipe (101, 201), gamma detector data, determining a distribution of the conductive region based on the resistance measurement data, determining a distribution of the non-conductive region based on the capacitance measurement data, and determining the fractions of components based on the distribution of the conductive region or non-conductive region corrected by gamma detector data in at least one iteration.