Acoustic resonance fluid flow measurement device and method
AssigneeFT Technologies (UK) Ltd
InventorsJavier CASTILLO, Sotiris SOTIROPOULOS
Life of this patent
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Abstract
A method of operating an acoustic resonance fluid flow sensor. The method comprises emitting an acoustic stimulus signal comprising a plurality of frequencies into an acoustic resonance cavity of the acoustic resonance fluid flow sensor, sensing an acoustic response signal within the acoustic resonance cavity and deriving the phases or equivalent group delays of one or more frequency components of a frequency spectrum of the acoustic response signal.
Claims13
A method of identifying a resonant frequency of an acoustic resonance fluid flow sensor, the method comprising:
- emitting an acoustic stimulus signal comprising a plurality of frequencies into an acoustic resonance cavity of the acoustic resonance fluid flow sensor;
- sensing an acoustic response signal within the acoustic resonance cavity;
- identifying a frequency of a peak in a frequency spectrum of the sensed acoustic response signal;
- deriving a phase or group delay of the sensed acoustic response signal at the identified frequency of the peak;
- and
- determining a speed of fluid flow through the sensor based on the derived phase or group delay.
An acoustic resonance fluid flow sensor comprising:
- an acoustic resonance cavity;
- a first transducer configured to emit an acoustic stimulus signal comprising a plurality of frequencies into the acoustic resonance cavity;
- a second transducer configured to sense an acoustic response signal within the acoustic resonance cavity;
- and
- a signal processing means configured to:
- identify a frequency of a peak in a frequency spectrum of the sensed acoustic response signal, derive a phase or group delay of the sensed acoustic response signal at the identified frequency of the peak;
- and determine a speed of fluid flow through the sensor based on the derived phase or group delay.
One or more storage media comprising computer instructions executable by one or more hardware processors for causing the one or more hardware processors to perform the steps of:
- emitting an acoustic stimulus signal comprising a plurality of frequencies into an acoustic resonance cavity of the acoustic resonance fluid flow sensor;
- sensing an acoustic response signal within the acoustic resonance cavity;
- identifying a frequency of a peak in a frequency spectrum of the sensed acoustic response signal;
- deriving a phase or group delay of the sensed acoustic response signal at the identified frequency of the peak;
- and
- determining a speed of fluid flow through the sensor based on the derived phase or group delay.
Dependencies are inferred from the claim text.