Fluid flowmeter having a hall effect sensor with an internal...

Details Fluid flowmeter having a hall effect sensor with an internal... Fluid flowmeter having a hall effect sensor with an internal...

G - Physics

01

F

G01F 1/00 (2006.01) G01F 1/075 (2006.01) G01F 1/56 (2006.01)

Patent

CA 2409303

A flowmeter for sensing fluid flow. The flowmeter includes a housing including a first port, a second port, a chamber in fluid communication with the first port and the second port, and a fluid passageway extending from the first port to the second port. An impeller having a non-magnetized metal pole piece is located within the chamber of the housing and is rotatable about an axis in response to fluid flow through the fluid passageway. A Hall Effect sensor and a magnet are located outside of the fluid passageway. The magnetic field generated by the magnet enables the Hall Effect sensor to sense rotation of the impeller and thereby the rate of fluid flow through the fluid passageway.

Il s'agit d'un débitmètre qui permet de capter le débit d'un liquide. Ce débitmètre comprend un boîtier comportant un premier orifice, un second orifice, une cavité en communication fluidique avec le premier et le second orifices, et un passage destiné au liquide, allant du premier au second orifice. Une hélice, pourvue d'une pièce polaire métallique non magnétique, se trouve à l'intérieur de la cavité du boîtier et peut tourner autour d'un axe par réaction au débit du liquide dans le passage associé. Un capteur à effet Hall et un aimant sont situés à l'extérieur du passage du liquide. Le champ magnétique produit par l'aimant permet au capteur à effet Hall de capter la rotation de l'hélice et donc, le débit du liquide dans le passage associé.

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