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1. WO2007096579 - SENSING A DISTURBANCE

Publication Number WO/2007/096579
Publication Date 30.08.2007
International Application No. PCT/GB2007/000359
International Filing Date 01.02.2007
IPC
G01B 9/00 2006.01
GPHYSICS
01MEASURING; TESTING
BMEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
9Instruments as specified in the subgroups and characterised by the use of optical measuring means
CPC
G01H 9/004
GPHYSICS
01MEASURING; TESTING
HMEASUREMENT OF MECHANICAL VIBRATIONS OR ULTRASONIC, SONIC OR INFRASONIC WAVES
9Measuring mechanical vibrations or ultrasonic, sonic or infrasonic waves by using radiation-sensitive means, e.g. optical means
004using fibre optic sensors
Applicants
  • BRITISH TELECOMMUNICATIONS PUBLIC LIMITED COMPANY [GB]/[GB] (AllExceptUS)
  • HEALEY, Peter [GB]/[GB] (UsOnly)
Inventors
  • HEALEY, Peter
Agents
  • CHABASSEUR, Vincent, Robert
Priority Data
06251017.724.02.2006EP
Publication Language English (EN)
Filing Language English (EN)
Designated States
Title
(EN) SENSING A DISTURBANCE
(FR) DÉTECTION D'UNE PERTURBATION
Abstract
(EN)
The present invention relates to a system for sensing a disturbance in a sensing region along an optical path. The sensing system includes: a source of optical radiation; an upstream junction for channelling light along a first path and along a second path, the first and second paths each extending through the sensing region in an acoustically coupled relationship, such that, in use, a disturbance experienced at one of the first and second paths is experienced at the other of the first and second paths; and, a downstream junction for combining light from the first path with light from the second path so as to provide an interferometric signal from which the presence of a disturbance can be inferred.
(FR)
L'invention concerne un système destiné à détecter une perturbation dans une zone de détection le long d'un trajet optique. Ce système de détection comprend: une source de rayonnement optique; un jonction amont destiné à canaliser la lumière le long d'un premier et d'un second trajet, ces premier et second trajets s'étendant chacun à travers une zone de détection en relation de couplage acoustique, de sorte qu'en fonctionnement, une perturbation soit produite au niveau d'un des premier et second trajets; et, une jonction avale destinée à combiner la lumière du premier trajet avec celle du second de manière à fournir un signal interférométrique à partir duquel la présence d'une perturbation peut être inférée.
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