Fiber-optic transducer for fluid and/or gas velocity...

G - Physics – 01 – P

Patent

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Details

IPC codes

G01P 5/26 (2006.01)

Type

Patent

Patent number

CA 2661276

Description

The invention relates to fiber-optic sensors for measuring liquid and/or gas flow rate, is used in systems for measuring liquid and/or gas velocity and can be used for monitoring water or natural gas flow rate, in particular in industrial systems which are used for monitoring a liquid or gas consumption rate in pipelines and in oil/gas wells. The inventive sensor comprises an optic fibre containing at least one Bragg fibre lattice which is provided with at least one concentrator of mechanical stresses generated in an optical fibre during the interaction thereof with a liquid and/or gas flow. Said invention makes it possible to increase the sensor sensibility.

Le présent modèle d'utilité concerne des capteurs à fibre optique de mesure du changement de vitesse d'écoulement de liquide et/ou de gaz et peut s'utiliser pour la mesure du débit de consommation d'eau ou de gaz naturel; il est surtout destiné aux systèmes industriels servant à surveiller le débit de gaz ou de liquides dans des canalisation ou des puits de gaz / de pétrole. Le capteur comprend une fibre optique comprenant au moins un réseau de fibres de Bragg, ce dernier étant muni d'au moins un concentrateur de tensions mécaniques qui apparaissent dans la fibre optique pendant son interaction avec un flux de liquide et/ou de gaz. Il est ainsi possible d'augmenter la sensibilité du capteur.

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