초록 ▼

A flow meter for measuring the flow in a dielectric pipe is disclosed. Two microwave signals are transmitted at measurement points via at least two transmitter antennae through the dielectric pipe and a flowing material. The distance between the measurement points is known. The signals that have pas

A flow meter for measuring the flow in a dielectric pipe is disclosed. Two microwave signals are transmitted at measurement points via at least two transmitter antennae through the dielectric pipe and a flowing material. The distance between the measurement points is known. The signals that have passed through are received by receiver antennae and signal cross correlation is formed by a correlator, the flow rate being determined on the basis of the best correlation result. The measurement result is improved by filtering and/or directing the signals.

대표청구항 ▼

[ We claim:] [1.] In a method of measuring the flow rate of a material with poor electrical conductivity in a dielectric conduit, the improvement to the method comprising:transmitting at least two different microwave signals from respective different measurement points a known distance apart through

[ We claim:] [1.] In a method of measuring the flow rate of a material with poor electrical conductivity in a dielectric conduit, the improvement to the method comprising:transmitting at least two different microwave signals from respective different measurement points a known distance apart through the conduit and material;receiving a combination of the signals transmitted from the respective measurement points through the conduit and material;separating the signals received in the combination from each other on a basis of the respective measurement points from which the signals were transmitted; andforming cross correlations between at least some of the separated signals for the measuring of the flow rate on a basis of a best one of the cross correlations.