Method and apparatus for the measurement of gas/liquid flow
First Claim
1. A method of determining flowrates of individual phases of a flowing multiphase medium, comprising the steps of:
- monitoring an electrical output signal from a detector which produces said output signal in response to one or more flow-related characteristics of said flowing multiphase medium;
deriving from said output signal a plurality of derived parameters selected from amplitude parameters, frequency parameters, or both amplitude and frequency parameters;
comparing each of said derived parameters with a corresponding calibration map relating that derived parameter to a range of possible flowrates of component phases of said flowing multiphase medium; and
,determining as a measure of flowrates of component phases of said flowing multiphase medium, a unique flowrate, common to all of a plurality of calibration maps, which is uniquely related to said derived parameters, said unique flowrate representing a flowrate of an individual phase of said flowing multiphase medium.
1 Assignment
0 Petitions
Accused Products
Abstract
A method of determining flowrates of individual constituent phases of a flowing multiphase medium includes digitizing electrical output signals from multiple sensors which produce signals in response to fluctuating high frequency hydrodynamic and physical property characteristics of the flowing medium. The nethod also includes deriving from the signals a plurality of stochastic features in amplitude and frequency domains such as a standard deviation, a coefficient of skewness, a coefficient of kurtosis, and linear prediction coefficients. Feature vectors are compared with a corresponding calibration map stored in a memory as a database relating feature vectors uniquely to flowrates of the component phases of the medium. Using a pattern recognition technique a unique match is determined as a measure of the flowrates of the component phases of the medium.
81 Citations
14 Claims
-
1. A method of determining flowrates of individual phases of a flowing multiphase medium, comprising the steps of:
-
monitoring an electrical output signal from a detector which produces said output signal in response to one or more flow-related characteristics of said flowing multiphase medium; deriving from said output signal a plurality of derived parameters selected from amplitude parameters, frequency parameters, or both amplitude and frequency parameters; comparing each of said derived parameters with a corresponding calibration map relating that derived parameter to a range of possible flowrates of component phases of said flowing multiphase medium; and
,determining as a measure of flowrates of component phases of said flowing multiphase medium, a unique flowrate, common to all of a plurality of calibration maps, which is uniquely related to said derived parameters, said unique flowrate representing a flowrate of an individual phase of said flowing multiphase medium. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14)
-
Specification