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US 12,716,910 B2Granted
Multi-wire velocity sensor
AssigneeTendo Technologies Inc.
InventorsMarcus Hultmark, Yuyang Fan
Life of this patent
Estimating the term…
Abstract
A hot wire anemometer including a substrate defining an opening through the substrate, configured to allow a fluid to flow through the opening, and multiple substantially parallel conductive wires, connected in series across the opening, in a direction parallel to a first surface of the substrate, where each wire is separated from adjacent wires by a distance that is 0.1 to 25 times the dimension of the wire in the transverse direction.
Claims33
A velocity sensor, comprising:
- a substrate defining an opening through the substrate from a first surface to a second surface opposite the first surface, the opening configured to allow a fluid to flow through the opening in a direction substantially normal to the first surface or the second surface;
- and
- a plurality of substantially parallel conductive wires, connected in series utilizing a plurality of connectors, each of the plurality of substantially parallel conductive wires being positioned across the opening in a direction parallel to the first surface of the substrate, each wire being a metal or metal alloy;
- wherein a distance separating each wire of the plurality of substantially parallel conductive wires from an adjacent wire is 0.1-25 times a dimension of the wire in a transverse direction.
1 more element
A velocity sensor system, comprising:
- a velocity sensor comprising:
- a substrate defining an opening through the substrate from a first surface to a second surface opposite the first surface, the opening configured to allow a fluid to flow through the opening in a direction substantially normal to the first surface or the second surface;
- a plurality of substantially parallel conductive wires, connected in series utilizing a plurality of connectors, each of the plurality of substantially parallel conductive wires being positioned across the opening in a direction parallel to the first surface of the substrate, each wire being a metal or metal alloy;
- wherein a distance separating each wire of the plurality of substantially parallel conductive wires from an adjacent wire is 0.1-25 times a dimension of the wire in a transverse direction;
- a measuring circuit configured to measure at least one of a voltage or a current of the velocity sensor system;
- and
- a power circuit configured to ensure each wire operates with an overheat ratio a of between 1.01 and 5.
4 more elements
A method for determining velocity of a fluid stream, comprising:
- providing a substrate and a plurality of substantially parallel conductive wires, the substrate defining an opening through the substrate from a first surface to a second surface opposite the first surface, the opening configured to allow a fluid to flow through the opening in a direction substantially normal to the first surface or the second surface, the plurality of substantially parallel conductive wires connected in series utilizing a plurality of connectors, each of the plurality of substantially parallel conductive wires being positioned across the opening in a direction parallel to the first surface of the substrate, each wire being a metal or metal alloy;
- heating each of the plurality of substantially parallel conductive wires to a temperature more than 5° C. warmer than a temperature of the fluid stream;
- allowing a fluid to pass through the opening;
- and
- either:
- determining a change in a resistance of the plurality of substantially parallel conductive wires while the fluid is passing through the opening and equating the velocity of the fluid to a result of a function of the determined change in resistance;
- or
- determining a change in a voltage from the measuring circuit while the fluid is passing through the opening and equating the velocity of the fluid to a result of a function of the determined change in voltage;
- or
- adjusting and measuring a voltage to keep a resistance of each of the plurality of substantially parallel conductive wires constant while the fluid is passing through the opening and equating the velocity of the fluid to a result of a function of the measured voltage.
7 more elements
Dependencies are inferred from the claim text.