Ultrasonic fluid flow measuring method and apparatus for inferring flow speed relative to the phase shift between signals from the transducers

US11536599B2 · kind B2 · utility

Assignee

• THE UNIVERSITY OF WARWICK · GB

Inventors

• Steve Dixon · Pfalzgrafenweiler, DE
• David Greenshields · Coventry, GB

Key dates

• Filing date: Mar 18, 2019
• Grant date: Dec 27, 2022
• Expiry date: Aug 18, 2039

Classification

• Technology area (CPC G): Physics
• CPC primary: G01F1/667
• WIPO field: Measurement
• WIPO sector: Instruments

Abstract

A method of inferring fluid flow speed through a passage comprises receiving a first signal having a frequency and phase corresponding to that of a first ultrasonic wave detected after passing through the fluid in a direction with a component opposed or aligned to a main direction of the fluid's flow. Receiving a second signal having a frequency and phase corresponding to that of a second ultrasonic wave detected after passing through the fluid in a direction with a component different to that of the first ultrasonic wave with respect to the main direction of the fluid's flow. Inferring the fluid flow speed through the passage based on the relative phase shift between the first and second signals.