An apparatus for pressure sensing

G - Physics – 01 – L

Patent

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Details

G01L 1/24 (2006.01) A61B 5/00 (2006.01) G01D 5/353 (2006.01) G01L 11/02 (2006.01) G02B 27/44 (2006.01)

Patent

CA 2599749

An apparatus comprising a light guide (110), a Bragg grating (108) incorporated into the light guide and a moveable wall portion. The moveable wall portion has opposite first and second sides and is being positioned so that a change the pressure at one of the sides relative to a pressure at the other side will move the moveable wall portion. The moveable wall portion is coupled to the Bragg grating so that the movement of the moveable wall portion causes a force on a side of the Bragg grating. The force has a component that is transversal to the Bragg grating and effects a change in strain of the Bragg grating and thereby a change in an optical period of the Bragg grating.

La présente invention concerne un appareil comprenant un conduit de lumière (110), un réseau de Bragg (108) incorporé dans le conduit de lumière et une partie de paroi mobile. La partie de paroi mobile comporte des premier et second côtés opposés et est positionnée de sorte qu~un changement de la pression au niveau d~un des côtés par rapport à une pression au niveau de l~autre côté déplacera la partie de paroi mobile. La partie de paroi mobile est accouplée au réseau de Bragg de sorte que le mouvement de la partie de paroi mobile entraîne une force sur un côté du réseau de Bragg. La force possède une composante qui est transversale au réseau de Bragg et effectue un changement de déformation du réseau de Bragg et ainsi un changement d~une période optique du réseau de Bragg.

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