Optic distributed sensing with improved detection of leaks in a blind region
AssigneeAP Sensing GmbH
InventorAlex Souza de Joode
Life of this patent
Estimating the term…
Abstract
A method and arrangement of fibre optic distributed sensing for detection of an event at an event location within a blind region including using at least one optical fibre arranged at least partly along an object to be monitored and at least one light pattern interrogator coupled with the optical fibre; injecting light patterns at subsequent times; detecting backscatter light from the light patterns; and analyzing the backscatter light to determine the event location so that a detection range of the fiber optic distribution range of the fiber-optic distributed sensing system is extended into a blind region conventionally not accessible for detecting acoustic disturbances or acoustic events.
Claims17
A method of fibre optic distributed sensing for detection of
- an event at an event location within a blind region, the method comprising:
- using at least one optical fibre arranged at least partly along an object to be monitored and at least one light pattern interrogator coupled with the optical fibre;
- injecting light patterns at subsequent times;
- detecting backscatter light from the light patterns;
- analysing the backscatter light to determine the event location including:
- identifying backscatter light from fibre disturbances due to a propagating pressure wave originating from the event location as event related backscatter light;
- and
- analysing the event related backscatter light to determine the event location,
- wherein the propagating pressure wave propagates through at least one of the object and surrounding between the object and the optical fibre;
- and
- tracking a wave front originating from the event location at different locations at different times by considering the event related backscatter light,
- wherein the blind region is formed by a region excluding a sensing accessible region.
An arrangement for fibre optic distributed sensing for detection of an event at an event location within a blind region, the arrangement comprising:
- at least one optical fibre arranged at least partly along an object to be monitored;
- at least one light pattern interrogator coupled with the optical fibre and adapted to inject light patterns at subsequent times;
- a detector adapted to detect backscatter light from the light patterns;
- and
- a processor adapted to analyse the backscatter light to determine the event location,
- wherein analysing the backscatter light to determine the event location includes:
- identifying backscatter light from fibre disturbances due to a propagating pressure wave originating from the event location as event related backscatter light;
- analysing the event related backscatter light to determine the event location,
- wherein the propagated pressure wave propagates through at least one of the object and surrounding between the object and the optical fibre;
- the processor being further adapted to track a wave front originating from the event location at different locations at different times by considering the event related backscatter light,
- wherein the blind region is formed by a region excluding a sensing accessible region.
Dependencies are inferred from the claim text.