Fiber-optic sensor for measuring liquid and/or gas flow rate

摘要

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.