Distributed optical pressure and temperature sensors

G - Physics – 01 – L

Patent

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G01L 11/02 (2006.01)

Patent

CA 2675436

Disclosed herein is a carrier for an optical fiber having a plurality of optical sensors located thereon. Such carrier can be a thick-walled capillary tube or other shapes. The carrier has a sealed hollow body with a side wall. The side wall is profiled at at least one predetermined location to form a thin-walled section and at least one optical sensor is attached to said thin-walled section,. As the thin-walled section flexes in response to a pressure difference across it, the pressure difference is sensed by the optical sensor. The carrier may also have a slot defined on its side wall to receive the optical fiber. A temperature optical sensor may also be provided adjacent to the pressure optical sensor.

La présente invention concerne un support pour une fibre optique qui comprend une pluralité de capteurs optiques situés sur cette dernière. Le support peut être un tube capillaire à paroi épaisse ou se présenter sous d'autres formes. Le support comprend un corps creux fermé comportant une paroi latérale. La paroi latérale est profilée au moins au niveau d'un endroit prédéterminé afin de former une section à paroi mince et au moins un capteur optique est fixé sur ladite section à paroi mince. Lorsque la section à paroi mince fléchit en réponse à une différence de pression qu'elle ressent, la différence de pression est détectée par le capteur optique. Le support peut également comporter une fente définie sur sa paroi latérale afin de recevoir la fibre optique. Un capteur optique de température peut également être placé adjacent au capteur optique de pression.

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