Karman vortex flowmeter assembly comprising a fiber bragg...

G - Physics – 01 – F

Patent

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G01F 1/32 (2006.01)

Patent

CA 2673114

An assembly comprising a fluid channel and a flowmeter, the flowmeter (1) comprising at least one vortex shedder (2) extending in the channel (C), each vortex shedder (2) being configured to generate Karman vortices (V) in fluid flowing through the channel (C) during operation, wherein each vortex shedder (2) is provided with a first fiber Bragg grating (FBG) of a fiber Bragg grating sensor (3, 7, FBG), wherein a Karman vortex frequency (fe) of the vortices (V) generated by the vortex shedder (2) is detectable utilizing a fiber Bragg grating (FBG) sensor signal relating to the respective first fiber Bragg grating (FBG) of that vortex shedder (2).

La présente invention concerne un assemblage comprenant un canal de fluide et un débitmètre, le débitmètre (1) comprenant au moins un formateur de vortex (2) se prolongeant dans le canal (C), chaque formateur de vortex (2) étant configuré de façon à produire des vortex de Karman (V) dans un fluide traversant le canal (C) en fonctionnement, chaque formateur de vortex (2) étant équipé d'un premier réseau Bragg sur fibre (FBG) d'une sonde de réseau Bragg sur fibre (3, 7, FBG), une fréquence de vortex de Karman (fe) des vortex (V) produits par le formateur de vortex (2) étant détectable en utilisant un signal de sonde de réseau Bragg sur fibre (FBG) par rapport au premier réseau Bragg sur fibre respectif (FBG) de ce formateur de vortex (2).

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