Flow meter
AssigneeWIKA Alexander Wiegand SE & Co. KG
InventorsFabian Pfeifer, Andre Rother, Juergen Pleyer, Alexander Will
Life of this patent
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Abstract
A flow meter for determining the flow velocity of a fluid in a media line, having a sensor base having a bluff body and a sensor body, an electronics unit and a signal interface. The bluff body is arranged substantially upstream of the sensor body in the direction of flow. The sensor body has a carrier part and a substrate arrangement having at least one ceramic substrate, and an anemometer sensor unit and a vortex meter sensor unit are arranged on the substrate arrangement.
Claims22
A flow meter for determining a flow velocity of a fluid in a media line, the flow meter comprising:
- a sensor base comprising a bluff body and a sensor body, the bluff body being arranged at least substantially upstream of the sensor body in a direction of flow, the sensor body comprising a carrier part and a substrate arrangement having at least one ceramic substrate;
- an electronics unit;
- a signal interface;
- an anemometer sensor unit arranged on the substrate arrangement;
- and
- a vortex meter sensor unit arranged on the substrate arrangement, the vortex meter sensor unit determining a frequency of the change in direction of a vortex street,
- wherein the anemometer sensor unit comprises:
- a first thick-film resistor for determining a medium temperature of the fluid;
- and
- a heated thick-film resistor for determining a flow-dependent power output, and
- wherein the first thick-film resistor and the heated thick-film resistor are arranged at a first distance from each other with respect to a vertical longitudinal axis of the sensor body.
A flow meter for determining a flow velocity of a fluid in a media line, the flow meter comprising;
- a sensor base comprising a bluff body and a sensor body, the bluff body being arranged at least substantially upstream of the sensor body in a direction of flow, the sensor body comprising a carrier part and a substrate arrangement having at least one ceramic substrate;
- an electronics unit;
- a signal interface;
- an anemometer sensor unit arranged on the substrate arrangement;
- and
- a vortex meter sensor unit arranged on the substrate arrangement, the vortex meter sensor unit determining a frequency of the change in direction of a vortex street,
- wherein the sensor body has, at least in sections, an elliptical or circular cross-sectional contour at least on a side which faces the flow.
A flow meter for determining a flow velocity of a fluid in a media line, the flow meter comprising:
- a sensor base comprising a bluff body and a sensor body, the bluff body being arranged at least substantially upstream of the sensor body in a direction of flow, the sensor body comprising a carrier part and a substrate arrangement having at least one ceramic substrate;
- an electronics unit:
- a signal interface;
- an anemometer sensor unit arranged on the substrate arrangement;
- and
- a vortex meter sensor unit arranged on the substrate arrangement, the vortex meter sensor unit determining a frequency of the change in direction of a vortex street,
- wherein the sensor base has sockets for receiving and holding the bluff body and/or the sensor body, and wherein the sockets are sealed by seals or by a form fit with respect to the bluff body and/or the sensor body.
A method for installing a flow meter in a media line, the flow meter having a sensor base comprising a bluff body and a sensor body, the bluff body being arranged at least substantially upstream of the sensor body in a direction of flow, the sensor body comprising a carrier part and a substrate arrangement having at least one ceramic substrate, the flow meter further having an electronics unit, a signal interface, an anemometer sensor unit arranged on the substrate arrangement and a vortex meter sensor unit arranged on the substrate arrangement, the method comprising:
- arranging the sensor base at a measuring point of the media line;
- inserting the bluff body through a socket of the sensor base so that the bluff body extends into the media line, wherein an immersion depth of the bluff body in the media line corresponds at least substantially to a diameter of the media line;
- inserting the sensor body through a socket of the sensor base so that the sensor body extends into the media line, wherein an immersion depth of the sensor body in the media line corresponds at least substantially to a radius of the media line;
- and
- fixing the bluff body and the sensor body to the sensor base by a fixing device.
Dependencies are inferred from the claim text.