Optics: measuring and testing – Velocity or velocity/height measuring – With light detector
Reexamination Certificate
2004-11-16
2009-10-27
Alsomiri, Isam (Department: 3662)
Optics: measuring and testing
Velocity or velocity/height measuring
With light detector
C073S861060
Reexamination Certificate
active
07609368
ABSTRACT:
A method for measuring the velocity of a multiphase fluid flowing in a pipe. The method comprises directing at least two collimated beams of light from an illuminator through the multiphase fluid by transparent portions of the pipe. The at least two collimated beams are spaced apart in a direction of flow of the multiphase fluid by a predetermined distance. The method also includes detecting scattered, deflected and attenuated light with at least two photodetectors to produce at least two signals. The at least two photodetectors are associated with the at least two collimated beams. The method also includes calculating a cross-correlation function between the at least two signals to determine a time delay between the signals and calculating the average velocity of the multiphase fluid by taking the ratio of the predetermined distance to the time delay.
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Alsomiri Isam
Hochberg D. Peter
Mellino Sean F.
Photon Control Inc.
Smola Daniel J.
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