公开(公告)号：US10895479B2

公开(公告)日：2021-01-19

申请号：US16493383

申请日：2018-02-15

Applicant: Endress+Hauser Flowtec AG

Inventor： Panagiotis Papathanasiou ,  Michal Bezdek ,  Vivek Kumar ,  Oliver Berberig

IPC: G01F1/66

Abstract: The present disclosure describes an ultrasonic flowmeter including: a measuring tube with a measuring tube wall and at least one pair of housings extending to an outer side of the measuring tube wall; a pair of ultrasonic transducers, each with a transducing element for generating and/or sensing ultrasonic pulses and a transducer body, wherein each of the housings is arranged to house one of the transducers, and wherein the housings have an inner first diameter; wherein transducer body includes a circumferential surface, and wherein the transducer body includes an end face, wherein the end face has a second diameter, and wherein the transducer includes at least one first protrusion protruding from the circumferential surface into a gap between the transducer body and the housing.

公开(公告)号：US10724879B2

公开(公告)日：2020-07-28

申请号：US15745194

申请日：2016-06-22

Applicant: Endress + Hauser Flowtec AG

Inventor： Vivek Kumar ,  Marc Hollmach

IPC: G01F1/32 ,  G01F1/36 ,  G01F1/40

Abstract: A flow measuring device operating on the vortex counter principle, comprises: a measuring tube; a blockage in the form of a bluff body in the measuring tube for bringing about a Karman vortex street with flow dependent vortex frequency; a first pressure fluctuation measuring arrangement for registering vortex related pressure fluctuations and for providing signals dependent on pressure fluctuations; a second pressure fluctuation measuring arrangement for registering vortex related pressure fluctuations and for providing signals dependent on pressure fluctuations. The first pressure fluctuation measuring arrangement is spaced in the longitudinal direction of the measuring tube from the second pressure fluctuation measuring arrangement. An evaluating unit for determining a vortex frequency and a flow measured value dependent thereon, and the evaluation unit is further adapted, based on the ratio of the amplitudes of the signals of the first pressure fluctuation measuring arrangement and the second pressure fluctuation measuring arrangement, or variables derived therefrom, to determine the current Reynolds number and/or the kinematic viscosity of the medium flowing in the measuring tube.

公开(公告)号：US20200072649A1

公开(公告)日：2020-03-05

申请号：US16493383

申请日：2018-02-15

Applicant: Endress+Hauser Flowtec AG

Inventor： Panagiotis Papathanasiou ,  Michal Bezdek ,  Vivek Kumar ,  Oliver Berberig

IPC: G01F1/66

Abstract: The present disclosure describes an ultrasonic flowmeter including: a measuring tube with a measuring tube wall and at least one pair of housings extending to an outer side of the measuring tube wall; a pair of ultrasonic transducers, each with a transducing element for generating and/or sensing ultrasonic pulses and a transducer body, wherein each of the housings is arranged to house one of the transducers, and wherein the housings have an inner first diameter; wherein transducer body includes a circumferential surface, and wherein the transducer body includes an end face, wherein the end face has a second diameter, and wherein the transducer includes at least one first protrusion protruding from the circumferential surface into a gap between the transducer body and the housing.

公开(公告)号：US20190383657A1

公开(公告)日：2019-12-19

申请号：US16471634

申请日：2017-12-08

Applicant: Endress+Hauser Flowtec AG

Inventor： Vivek Kumar ,  Alfred Rieder ,  Simon Triebenbacher

IPC: G01F1/84

Abstract: The present disclosure relates to a Coriolis mass flow meter including: a measuring tube; an one exciter for generating vibrations in the measuring tube; two sensors for detecting the vibrations in the measuring tube and for outputting associated sensor signals; and an operating and evaluating unit for determining a mass flow value of a medium in the measuring tube based on a phase difference or time difference between the sensor signals, wherein for Reynolds numbers below a Reynolds number threshold a cross-sensitivity to a viscosity of the medium correlates with a Stokes number, wherein the operating and evaluating unit is configured to determine a current value of the Stokes number for Reynolds numbers below the lower Reynolds number threshold and to compensate for the influence of the cross-sensitivity in the determining of the mass flow.