Method for determining a property of a fluid flowing through a conduit, and method for providing capacitu00e1ncias corrected using a sensor of capacitu00e1ncia cancel to determine a dielectric property of a fluid in a conduit.

摘要

Methods to determine a property of a fluid flowing through a conduit and to provide corrected using a capacitance sensor capacitances cancel to determineA dielectric property of a test fluid in a conduit, and capacitance meter.Method for determining a property of a fluid flowing through a conduit (1) provided with a capacitance meter comprising u m sensor capacitance to cancel the amount andThe downstream (2a, 2b), in which each sensor comprises at least three annular capacitance sensor electrodes (11a 11B, 13a, 13b)The sensor electrodes are distributed around the circumference of the conduit, the method comprising selecting, for each sensor capacitance annul, a set of capacitors for measuring.In a measuring capacitor is formed by two measuring electrodes.And in which a measuring electrode consists of either a single sensor electrode and at least two sensor electrodes are interconnected; measure at various times during a time interval a capacitu00e2nThe CLA of each capacitor of capacitance sensor measurement of each ring (2a, 2b).To determine cross correlations between capacitances measured during the time interval in the sensor capacitance to cancel the amount (2a) and the capacitances measured during the time interval in the sense.A capacitance offset downstream (2b); and determining the propriety of fluency from the cross correlations.