公开(公告)号：US20210072058A1

公开(公告)日：2021-03-11

申请号：US16982398

申请日：2019-03-18

Applicant: The University of Warwick

Inventor： Steve DIXON ,  David GREENSHIELDS

IPC: G01F1/66

Abstract: Disclosed is a method of inferring fluid flow speed through a passage. The method comprises receiving a first signal having a frequency and phase corresponding to that of a detected first ultrasonic wave, the first ultrasonic wave having been detected after passing through the fluid in a direction with a component opposed or aligned to a main direction of the fluids flow. Further, receiving a second signal having a frequency and phase corresponding to that of a detected second ultrasonic wave, the second ultrasonic wave having been 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 fluids flow. Further, inferring the fluid flow speed through the passage in accordance with the relative phase shift between the first and second signals. The frequencies of the first and second ultrasonic waves are substantially the same or are substantially harmonics of one another.