Method for measuring a speed of a fluid
US11199429B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Jun 22, 2018 |
| Grant date | Dec 14, 2021 |
| Priority date | — |
| Expiry date | Sep 20, 2038 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03M1/124
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A method for measuring a speed of a fluid includes transmitting an ultrasonic measurement signal; acquiring and digitizing a measurement portion of an ultrasonic measurement signal received after traveling a defined length to obtain measurement samples; estimate, from the samples, an amplitude of the measurement portion; access reference samples forming a reference curve which is an interpolation of the measurement samples; produce adjusted measurement samples by multiplying the samples by ratio between an amplitude of the reference curve and the amplitude of the measurement portion; determine a unit time delay between the adjusted measurement sample and the reference curve; 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 defined length; estimate the speed of the fluid from the travel time measurement.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.