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Found results for
patents
1.
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METHOD FOR MEASURING A SPEED OF A FLUID
Document Number |
03067467 |
Status |
In Force |
Filing Date |
2018-06-22 |
Open to Public Date |
2019-01-03 |
Grant Date |
2021-11-30 |
Owner |
SAGEMCOM ENERGY & TELECOM SAS (France)
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Inventor |
Teboulle, Henri
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Abstract
A method for measuring a speed of a fluid, comprising the steps of: - transmitting an ultrasonic measurement signal (Se); acquiring and digitising a measurement portion (25, 26) of an ultrasonic measurement signal received (Sr, Sri, Sr2) after the ultrasonic measurement signal (Se) has travelled a path of defined length (L) to obtain measurement samples; - estimate, from the measurement samples, an amplitude of the measurement portion; - access reference samples from a reference table pre-filled and stored in a memory, the reference samples forming a reference curve which is an interpolation of the measurement samples; - produce adjusted measurement samples by multiplying the measurement samples by a ratio between an amplitude of the reference curve and the amplitude of the measurement portion; - for each adjusted measurement sample, determine a unit time delay between the adjusted measurement sample and the reference curve; - for each adjusted measurement sample, estimate a zero-crossing time of the measurement portion from the unit time delay and from the reference samples; estimate, from an average of the zero-crossing times, the time it takes the ultrasonic measurement signal to travel the path of defined length; - estimate the speed of the fluid from the travel time measurement.
IPC Classes ?
- G01P 5/24 - Measuring speed of fluids, e.g. of air stream; Measuring speed of bodies relative to fluids, e.g. of ship, of aircraft by measuring the direct influence of the streaming fluid on the properties of a detecting acoustical wave
- G01F 1/66 - Measuring the volume flow or mass flow of fluid or fluent solid material wherein the fluid passes through a meter in a continuous flow by measuring frequency, phase shift or propagation time of electromagnetic or other waves, e.g. using ultrasonic flowmeters
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2.
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METHOD FOR MEASURING A SPEED OF A FLUID
Document Number |
03061189 |
Status |
In Force |
Filing Date |
2018-03-30 |
Open to Public Date |
2018-11-01 |
Grant Date |
2020-06-23 |
Owner |
SAGEMCOM ENERGY & TELECOM SAS (France)
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Inventor |
Teboulle, Henri
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Abstract
Method for measuring a speed of a fluid, implemented by an ultrasonic flow meter (10) comprising a reflector mirror (15a, 15b) positioned between two transducers (14a, 14b), the measuring method comprising measurement phases in which: - one of the two transducers emits an ultrasonic measurement signal; - the other of the two transducers receives the ultrasonic measurement signal after it has completed a measurement trip; - the processing means (18) evaluate the speed of the fluid depending on a measurement trip time; the measurement method furthermore comprising compensation phases in which: - one of the two transducers emits an ultrasonic compensation signal; - said transducer receives the ultrasonic compensation signal after it has completed a compensation trip during which it was reflected by the reflector mirror; - the processing means compensate for a measurement drift of said transducer by adjusting the measurement trip time depending on a compensation trip time.
IPC Classes ?
- G01F 15/02 - Compensating or correcting for variations in pressure, density, or temperature
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