公开(公告)号：US20230228603A1

公开(公告)日：2023-07-20

申请号：US18002376

申请日：2021-06-16

Applicant: Endress+Hauser Flowtec AG

Inventor： Oliver Berberig ,  Thomas Fröhlich ,  Beat Kissling ,  Quirin Müller ,  Klaus Bussinger

IPC: G01F1/667 ,  G01F1/66 ,  G01F15/18 ,  G01P5/24

CPC classification number: G01F1/667 ,  G01F1/662 ,  G01F15/18 ,  G01P5/241

Abstract: A clamp-on ultrasonic flowmeter includes pairs of ultrasonic transducers arranged on an exterior of a pipeline, and an electronic measuring/operating circuit for operating the transducers and for registering and evaluating measurement signals and for providing measured values of volume flow or flow velocity. The pairs are implemented as 1-traverse or 2-traverse pairs. One-traverse pairs are arranged on opposite sides of the pipeline, and 2-traverse pairs are arranged on a same side of the pipeline. At least three pairs are arranged on the pipeline and are distributed peripherally. Adjoining pairs of a number of pairs have an inner angle down to a minimum inner angle (MIA) between one another measured about a pipeline axis, which minimum inner angle obeys the following relationship:


MIA=360°/(T*N*F(T,N))

with T as number of traverses and F(T,N)=0.38+0.62*T+(0.048−0.01*T{circumflex over ( )}2)*(N−2){circumflex over ( )}2.

公开(公告)号：US20250027805A1

公开(公告)日：2025-01-23

申请号：US18249361

申请日：2021-09-13

Applicant: Endress+Hauser Flowtec AG

Inventor： Thomas Fröhlich

IPC: G01F25/10 ,  G01F1/667

Abstract: A method for verifying a clamp-on ultrasonic measurement device, wherein the measurement device comprises: at least two ultrasonic transducers configured to transmit and receive ultrasonic signals; and an electronic measuring/operating circuit configured to operate the ultrasonic transducers, to provide measured values of a measured variable, and to perform the verification, wherein the electronic measuring/operating circuit has a memory, the method comprising: mounting the measurement device on a standard measuring section; switching on a verification mode of the electronic measuring/operating circuit; transmitting an ultrasonic signal with at least one ultrasonic transducer and receiving the ultrasonic signal with at least one ultrasonic transducer; detecting a measured value of a verification variable of the ultrasonic signal and comparing the measured value with a specification value, stored in the memory, of the verification variable; outputting a verification result; and terminating the verification mode.