公开(公告)号：US20200340841A1

公开(公告)日：2020-10-29

申请号：US16958942

申请日：2018-12-17

Applicant: Endress+Hauser Flowtec AG

Inventor： Benjamin Schwenter ,  Christof Huber ,  Christian Schütze ,  Achim Wiest

IPC: G01F1/84 ,  G01N9/00

Abstract: A vibratory measuring device for determining a mass flow rate or a density of a flowable medium comprises: a vibratory measuring tube which is curved when in the idle position thereof; a support body; a first bearing body on the inlet side; a second bearing body on the outlet side; two exciter units and two sensor units; and an operation and evaluation circuit. The bearing bodies are connected to the support body, wherein the measuring tube is supported on the bearing bodies in such a way that flexural vibration modes of the measuring tube have vibration nodes on the bearing bodies, wherein the exciter units are each configured, according to excitation signals, to excite flexural vibrations of the measuring tube both in the measuring tube plane and perpendicular to the measuring tube plane, wherein the sensor units are each configured to detect flexural vibrations of the measuring tube both in the measuring tube plane and perpendicular to the measuring tube plane and to output vibration-dependent sensor signals, wherein the operation and evaluation circuit is configured to output excitation signals to the excitation units for the selective excitation of flexural vibration modes and to receive the sensor signals of the sensor units.

公开(公告)号：US10801870B2

公开(公告)日：2020-10-13

申请号：US16618707

申请日：2018-05-08

Applicant: Endress+Hauser Flowtec AG

Inventor： Christof Huber ,  Christian Schütze ,  Dieter Mundschin ,  Benjamin Schwenter ,  Severin Ramseyer ,  Marc Werner

IPC: G01F1/84 ,  G01F15/18 ,  G01F25/00

Abstract: A mass flow sensor includes: a vibratory measurement tube bent in a tube plane; a vibration exciter for exciting bending vibrations in a bending vibration use-mode; two vibration sensors for sensing vibrations; a support system having a support plate, bearing bodies on the inlet and sides; and a sensor housing, wherein: the support system has support system vibration modes which include elastic deformations of the support plate; the measurement tube is connected fixedly to the support plate by the bearing body on the inlet side and by the bearing body on the outlet side; and the support plate has a number of spring-loaded bearings exposed through cut-outs in the support plate by which the support plate is mounted on the sensor housing with degrees of vibrational freedom, the natural frequencies of which are lower than a use-mode natural frequency of the bending vibration use-mode.