公开(公告)号：US20170307428A1

公开(公告)日：2017-10-26

申请号：US15520102

申请日：2015-09-02

Applicant: Endress + Hauser Flowtec AG

Inventor： Krishna Malladi ,  Martin Arnold ,  Michel Wagner

IPC: G01F1/684 ,  G01F1/69 ,  G01P13/00 ,  G01F1/696

CPC classification number: G01F1/6847 ,  G01F1/688 ,  G01F1/69 ,  G01F1/6965 ,  G01F25/0007 ,  G01P13/0046

Abstract: A thermal, flow measuring device for ascertaining a mass flow or a flow velocity of a medium in a pipe. The thermal, flow measuring device has at least one measuring transducer with at least a first and a second sensor element. The first sensor element has a pin-shaped metal sleeve, which has a lowest point on a wall of the metal sleeve in the gravitational direction, wherein there is arranged in the metal sleeve at least one heating means, especially a heatable temperature sensor. The heating means is arranged in the metal sleeve and above the aforementioned point in the gravitational direction, in such a manner that the maximum heat input per unit area from the heating means into the medium occurs in the gravitational direction above the point.

公开(公告)号：US11598657B2

公开(公告)日：2023-03-07

申请号：US17413890

申请日：2019-11-13

Applicant: Endress+Hauser Flowtec AG

Inventor： Marc Hollmach ,  Michel Wagner ,  Rainer Höcker

IPC: G01F1/32 ,  G01F1/325

Abstract: A measurement system includes: a tube; a bluff body, situated in the lumen of the tube, for generating vortices in a flowing fluid such that a Karman vortex street is formed downstream of the bluff body; a vortex sensor, having a mechanical resonant frequency, for providing a vortex sensor signal which changes over time and contains a first component representing the vortex shedding frequency and which contains a second component representing the mechanical resonant frequency of the vortex sensor; and transducer electronics for evaluating the at least one vortex sensor signal and configured to do the following: to determine vortex frequency measurement values representing the shedding frequency using the first component and, if the first component is not present, not to provide flow parameter measurement values and to generate a message indicating the current flow speed is not lower than the current acoustic velocity of the flowing fluid.

公开(公告)号：US20220057240A1

公开(公告)日：2022-02-24

申请号：US17413890

申请日：2019-11-13

Applicant: Endress+Hauser Flowtec AG

Inventor： Marc Hollmach ,  Michel Wagner ,  Rainer Höcker

IPC: G01F1/32

Abstract: A measurement system includes: a tube; a bluff body, situated in the lumen of the tube, for generating vortices in a flowing fluid such that a Kármán vortex street is formed downstream of the bluff body; a vortex sensor, having a mechanical resonant frequency, for providing a vortex sensor signal which changes over time and contains a first component representing the vortex shedding frequency and which contains a second component representing the mechanical resonant frequency of the vortex sensor; and transducer electronics for evaluating the at least one vortex sensor signal and configured to do the following: to determine vortex frequency measurement values representing the shedding frequency using the first component and, if the first component is not present, not to provide such flow parameter measurement values and to generate a message indicating the current flow speed is not lower than the current acoustic velocity of the flowing fluid.