Device and a method for measuring fluid-mechanically effective material parameters of a fluid

Patent metadata

Field	Value
Publication number	US-10060843-B2
Application number	US-201615046507-A
Country	US
Kind code	B2
Filing date	Feb 18, 2016
Priority date	Nov 30, 2009
Publication date	Aug 28, 2018
Grant date	Aug 28, 2018

Abstract

A method and a device for the measurement of fluid-mechanically effective parameters of a fluid, with a fluid pump which comprises a delivery element ( 2 ) which is mounted in a magnet bearing ( 10, 10 a, 11, 11 a ), according to the invention, envisages the delivery element ( 2 ) of the fluid pump being excited into an oscillation by way of an excitation device ( 16, 44 ), wherein the oscillation parameters as well as, as the case may be, the oscillation behavior is measured, and parameters of the fluid are determined from this.

First claim

The invention claimed is:

1. A blood pump system comprising:
a blood pump, the blood pump further including a delivery element and a magnetic bearing, the magnetic bearing comprising a permanent magnet and a first coil;
a closed-loop control device configured to stabilize the position of the delivery element; and
an excitation device for the excitation of the delivery element against a counter-force applied by the magnetic bearing, the excitation device comprising a second coil,
wherein the control device is further configured to determine at least one fluid-mechanically effective parameter of a fluid flowing by the delivery element.

2. The blood pump system according to claim 1 , wherein the control device is coupled to a sensor for measuring an oscillation frequency of the delivery element.

3. The blood pump system according to claim 1 , wherein the control device is coupled to a sensor for measuring an oscillation amplitude.

4. The blood pump system according to claim 1 , wherein the control device is coupled to a time detection device for measuring an oscillation build-up behavior and/or an oscillation decay behavior of the delivery element.

5. The blood pump system according to claim 1 , wherein the excitation device is connected to the closed-loop control device.

6. The blood pump system according to claim 1 , wherein the magnetic bearing is an axial magnetic bearing.

7. The blood pump system according to claim 1 , wherein the excitation device is configured for exciting the delivery element in an axial direction.

8. The blood pump system according to claim 1 , wherein the excitation device is configured for exciting the delivery element in radial direction.

9. The blood pump system according to claim 1 , wherein the control device is coupled to a sensor for measuring the excitation behaviour of the delivery element.

10. The blood pump system of claim 9 , wherein the control device is configured to receive signals from the sensor in response to the excitation of the delivery element.

Assignees

• Berlin Heart Gmbh

Inventors

• Graichen Kurt
• Arndt Andreas
• Nuesser Peter

Classifications

• A61M1/1086

  Human Necessities · mapped topic

• A61M1/122

  Human Necessities · mapped topic

• A61M1/1031

  Human Necessities · mapped topic

• A61M2205/3334

  Measuring or controlling the flow rate · CPC title

• G01N11/162 Primary

  Oscillations being torsional, e.g. produced by rotating bodies · CPC title