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

Patent metadata

Field	Value
Publication number	US-2016193398-A1
Application number	US-201615046507-A
Country	US
Kind code	A1
Filing date	Feb 18, 2016
Priority date	Nov 30, 2009
Publication date	Jul 7, 2016
Grant date	—

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 behaviour is measured, and parameters of the fluid are determined from this.

First claim

1 . A blood pump system including a blood pump, the blood pump further including a delivery element, a magnetic bearing and the system further including a closed-loop control device for stabilizing the position of the delivery element;
further including an excitation device for the excitation of the delivery element against a counter-force applied by the magnetic bearing; and a control device for determining 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.

11 . A blood pump including a delivery element, a magnetic bearing and the system further including a closed-loop control device for stabilizing the position of the delivery element;
further including an excitation device for the excitation of the delivery element against a counter-force applied by the magnetic bearing; and a control device for determining at least one fluid-mechanically effective parameter of a fluid flowing by the delivery element; wherein the bearing and the excitation device share a coil used in closed-loop control and used for exciting the delivery element.

Assignees

• Berlin Heart Gmbh

Inventors

• Graichen Kurt
• Arndt Andreas
• Nuesser Peter

Classifications

• A61M1/1086 Primary

  Human Necessities · mapped topic

• A61M1/1015

  Human Necessities · mapped topic

• A61M60/822

  specially adapted for being actively controlled · CPC title

• A61M60/816

  Sensors arranged on or in the housing, e.g. ultrasonic flow sensors · CPC title

• A61M60/546

  of blood flow, e.g. by adapting rotor speed · CPC title