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A sensor for combined temperature, pressure, and refractive index detection = Sensor für kombinierte Temperatur-, Druck- und Brechungsindexerfassung = Capteur pour la détection associée d'une température, d'une pression, et d'un indice de réfraction

Authors
/persons/resource/reinsch

Reinsch,  Thomas
4.8 Geoenergy, 4.0 Geosystems, Departments, GFZ Publication Database, Deutsches GeoForschungsZentrum;

Bremer,  Kort
External Organizations;

Lewis,  Elfed
External Organizations;

Leen,  Gabriel
External Organizations;

Lochmann,  Steffen
External Organizations;

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Citation

Reinsch, T., Bremer, K., Lewis, E., Leen, G., Lochmann, S. (2019): A sensor for combined temperature, pressure, and refractive index detection = Sensor für kombinierte Temperatur-, Druck- und Brechungsindexerfassung = Capteur pour la détection associée d'une température, d'une pression, et d'un indice de réfraction, International application number: PCT/EP2013/055677, International publication number: WO 2013/139783 (26.09.2013 Gazette 2013/39). Auch veröffentlicht unter EP2828622A1, US20150077736.


Cite as: https://gfzpublic.gfz-potsdam.de/pubman/item/item_1039890
Abstract
A sensor (1) has a light conductor (2) having a grating (FBG), a cavity (5), and a transparent cavity end wall (4), a light emitter for directing light through the conductor, and a light detector for detecting reflected light, and a processor. The processor is adapted to analyse light reflected due to the grating (FBG, 6) to determine an indication of temperature, light reflected from the end (7) of the cavity (5) to determine an indication of pressure, and also light reflected from the outer surface (8) of the cavity wall (4) to determine an indication of refractive index of a medium outside said cavity wall. The processor may use one output to compensate another, for example pressure and temperature may be used to compensate for variation in refractive index.