Flow meter configuration and calibration
AssigneeStreamLabs, Inc.
InventorsBrian Gestner, Francis M. Mess, Jeffrey L. Leaders
Life of this patent
Estimating the term…
Abstract
Methods and systems for configuring a fluid flow meter include a processor obtaining a measurement signal recorded by the fluid flow meter. The processor can determine a whitening frequency band. The processor can then construct a whitening filter based on the measurement signal and the whitening frequency band. The processor can then generate a reference signal based on the whitening filter and the measurement signal. The processor can provide the whitening filter and the reference signal for use by the fluid flow meter to measure a time shift between the reference signal and another measurement signal.
Claims20
A system for configuring an ultrasonic fluid flow meter comprising:
- one or more computers;
- and
- one or more memories storing computer executable instructions thereon, the computer executable instructions when executed by the one or more computers cause the one or more computers to:
- receive an input signal indicative of a measurement signal recorded by the ultrasonic fluid flow meter mounted on a structure defining a lumen, the measurement signal representing an ultrasonic signal propagating through fluid flowing in the lumen;
- determine a whitening frequency band based on the input signal;
- construct a whitening filter having a whitening filter Fourier transform, the whitening filter Fourier transform of the whitening filter inversely proportional to a magnitude of an input signal Fourier transform of the input signal, wherein the whitening filter Fourier Transform is within the whitening frequency band;
- generate a reference signal by filtering the input signal using the whitening filter;
- and
- provide representations of the whitening filter and the reference signal to the fluid flow meter for use in estimating fluid flow rates based on ultrasonic signals measured by the fluid flow meter, the fluid flow meter configured to filter a measured ultrasonic signal using the whitening filter and cross correlate the filtered ultrasonic signal with the reference signal to estimate a time shift associated with the measured ultrasonic signal.
A method of configuring ultrasonic fluid flow meters comprising:
- receiving, by one or more computers, an input signal indicative of a measurement signal recorded by an ultrasonic fluid flow meter mounted on a structure defining a lumen, the measurement signal representing an ultrasonic signal propagating through fluid flowing in the lumen;
- determining, by the one or more computers, a whitening frequency band based on the input signal;
- constructing, by the one or more computers, a whitening filter having a whitening filter Fourier transform, the whitening filter Fourier transform of the whitening filter inversely proportional to a magnitude of an input signal Fourier transform of the input signal, wherein the whitening filter Fourier Transform is within the whitening frequency band;
- generating, by the one or more computers, a reference signal by filtering the input signal using the whitening filter;
- and
- providing, by the one or more computers, representations of the whitening filter and the reference signal to the fluid flow meter for use in estimating fluid flow rates based on ultrasonic signals measured by the fluid flow meter, the fluid flow meter configured to filter a measured ultrasonic signal using the whitening filter and cross correlate the filtered ultrasonic signal with the reference signal to estimate a time shift associated with the measured ultrasonic signal.
A non-transitory computer-readable medium including computer code instructions stored thereon, the computer code instructions when executed by a one or more computers cause the one or more computers to:
- receive an input signal indicative of a measurement signal recorded by an ultrasonic fluid flow meter mounted on a structure defining a lumen, the measurement signal representing an ultrasonic signal propagating through fluid flowing in the lumen;
- determine a whitening frequency band based on the input signal;
- construct a whitening filter having a whitening filter Fourier transform, the whitening filter Fourier transform of the whitening filter inversely proportional to a magnitude of an input signal Fourier transform of the input signal, wherein the whitening filter Fourier Transform is within the whitening frequency band;
- generate a reference signal by filtering the input signal using the whitening filter;
- and
- provide representations of the whitening filter and the reference signal to the fluid flow meter for use in estimating fluid flow rates based on ultrasonic signals measured by the fluid flow meter, the fluid flow meter configured to filter a measured ultrasonic signal using the whitening filter and cross correlate the filtered ultrasonic signal with the reference signal to estimate a time shift associated with the measured ultrasonic signal.
Dependencies are inferred from the claim text.