Apparatus for measuring a liquid flow
AssigneeFresenius Medical Care Deutschland GmbH
InventorsAlexander Heide, Dejan Nikolic
Life of this patent
Estimating the term…
Abstract
An electromagnetic flowmeter for measuring a flow of liquid in a liquid-carrying line has a magnet for producing a magnetic field in the liquid-carrying line, and an electrode pair for discharging an electrical voltage when the liquid flows through the liquid-carrying line. The flowmeter enables the flow of liquid to be determined on the basis of the measured voltage. The magnet can rotate about an axis in order to produce an alternating magnetic field.
Claims13
An electromagnetic flowmeter for measuring a liquid flow in a liquid-carrying line, said flowmeter comprising:
- a magnet for generating a magnetic field in the liquid-carrying line;
- an electrode pair for tapping an electric voltage when the liquid flows through the liquid-carrying line, for determining the liquid flow based on the measured voltage, with the magnet being rotatable about an axis to generate an alternating magnetic field;
- an element for determining a phase relation of an interference component of the measured electric voltage;
- an element for determining a signal that has been freed of the interference component, based on the measured voltage;
- and
- an element for determining the liquid flow, based on the signal that has been freed of the interference component.
An assembly comprising:
- an electromagnetic flowmeter for measuring a liquid flow in a liquid-carrying line;
- and
- a liquid pump for circulating a liquid in the liquid-carrying line,
- the electromagnetic flowmeter including
- a magnet for generating a magnetic field in the liquid-carrying line,
- an electrode pair for tanning can electric voltage when t to liquid flows through the liquid-carrying line, for determining the liquid flow based on the measured voltage, with the magnet being rotatable about an axis to generate an alternating magnetic field,
- an element for determining a phase relation of an interference component of the measured electric voltage,
- an element for determining a signal that has been freed of the interference component, based on the measured voltage, and
- an element for determining the liquid flow, based on the signal that has been freed of the interference component, and
- the liquid pump including a pump rotor connected to the rotatable magnet or to a rotatable magnetizable coil.
An assembly comprising:
- an electromagnetic flowmeter for measuring a liquid flow in a liquid-carrying line;
- and
- a liquid pump, for circulating a liquid in the liquid-carrying line, the liquid pump including a pump rotor,
- the electromagnetic flowmeter including
- a magnet for generation a magnetic field in the liquid-carrying line,
- an electrode pair for tapping an electric voltage when the liquid flows through the liquid-carrying line, for determining the liquid flow based on the measured voltage, with the magnet being rotatable about an axis to generate an alternating magnetic field, and
- a first magnetic coupling half connected to the pump rotor, of a magnetic coupling for coupling the first coupling half to a second coupling half of the magnetic coupling connected to a drive that drives the liquid pump via the magnetic coupling, with the first coupling half including the rotatable magnet, and
- the pump rotor being connected to the rotatable magnet or to a rotatable magnetizable coil.
Dependencies are inferred from the claim text.