Shape memory sensor

G - Physics – 01 – D

Patent

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Details

G01D 5/02 (2006.01) G01K 5/48 (2006.01)

Patent

CA 2710826

The invention relates to a sensor for measuring an environmental effect, comprising a sensor material having an internal stress, which sensor material is designed to at least partially relax under the influence of the environmental effect. The sensor further comprising a detection unit for indirectly or directly detecting said relaxation. The invention also relates to a waveguide, comprising a grating in at least a portion of the waveguide, which waveguide comprises a coating, the coating comprising a polymer that contains reversible crosslinks that can be broken by the environmental effect in such a way that the polymer changes shape. The invention further relates to a sensor system comprising a waveguide, a light source, and a photo-detector.

L'invention concerne un capteur pour mesurer un effet environnemental, comprenant un matériau de détection ayant une contrainte interne, ledit matériau de détection étant conçu pour se détendre au moins partiellement sous l'influence de l'effet environnemental. Le capteur comprend de plus une unité de détection pour détecter directement ou indirectement ladite détente. L'invention concerne également un guide d'onde comprenant un réseau de diffraction dans au moins une partie du guide d'onde, ledit guide d'onde comprenant un revêtement, ledit revêtement comprenant un polymère qui contient des liaisons croisées réversibles qui peuvent être interrompues par l'effet environnemental de telle sorte que le polymère change de forme. L'invention concerne de plus un système de détection comprenant un guide d'onde, une source de lumière et un détecteur photoélectrique.

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