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.

公开(公告)号：US20250027800A1

公开(公告)日：2025-01-23

申请号：US18708943

申请日：2022-11-09

Applicant: The University of Warwick

Inventor： Steve DIXON ,  Andrew FEENEY ,  Lei KANG ,  Zhichao LI

IPC: G01F1/667 ,  G01F1/66

Abstract: Apparatus (1) for measuring fluid flow is disclosed. The apparatus comprises first, second and third ultrasonic transducers (8), the second and third ultrasonic transducers arranged to receive an ultrasonic wave (13) from the first ultrasonic transducer, wherein the second and third ultrasonic transducers are spaced apart by a given distance. The apparatus further comprises a circuit (6) comprising a phase comparator (21) arranged to compare first and second signals (20) from the second and third ultrasonic transducers.

公开(公告)号：US20210264888A1

公开(公告)日：2021-08-26

申请号：US17261682

申请日：2019-07-16

Applicant: The University of Warwick

Inventor： Steve DIXON ,  Lei KANG ,  Andrew FEENEY

IPC: G10K9/22 ,  B06B1/06 ,  G10K9/122 ,  H01L41/053

Abstract: A flexural ultrasonic transducer is disclosed. The ultrasonic transducer comprises a sealed case which includes a flexible membrane and which defines a sealed cavity. The sealed case has an inside and an outside. The ultrasonic transducer comprises an active element, for example, a piezoelectric element, inside the sealed case supported on the flexible membrane. The ultrasonic transducer includes a liquid in the cavity. The sealed case includes a resilient portion between the inside and outside of the case for allowing equalization of pressure between the inside and the outside of the case. The resilient portion may comprise resilient walls or a thin-wall section, the flexible membrane or the case.