Thermal measuring and testing – Temperature measurement – Nonelectrical – nonmagnetic – or nonmechanical temperature...
Patent
1999-05-13
2000-01-25
Gutierrez, Diego
Thermal measuring and testing
Temperature measurement
Nonelectrical, nonmagnetic, or nonmechanical temperature...
2504581, 2505781, G01K 1120, G01J 158
Patent
active
060171480
ABSTRACT:
The present invention relates to a device for optically measuring the temperatures of cryogenic fluids by analyzing the decay in the luminescence of a doped crystal, the device comprising a light source for exciting said crystal, an optical fiber for transporting the light flux emitted by said source to the crystal and for returning to a detection assembly the luminescent light emitted by the crystal as a result, and a measurement probe past which the fluid moves, wherein the doped crystal is constituted by one of the crystals from the group comprising strontium fluoride doped with divalent ytterbium, SrF.sub.2 :Yb.sup.2+ ; and calcium fluoride doped with divalent ytterbium, CaF.sub.2 :Yb.sup.2+. The crystal is placed at an interior end of a housing constituting the probe. The fiber has a surrounding capillary being placed in the housing facing the covering. A chamber is defined between the end of the fiber and the covering. The housing includes an inlet orifice in the chamber perpendicular to the fiber axis and an outlet for a fluid in the chamber.
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Bertrand Stephane F.
Boulon Georges
Rouhet Jacky Y.
Tribillon Gilbert M.
Goodwin Jeanne-Marguerite
Gutierrez Diego
Societe National d'Etude et de Construction de Moteurs d'Aviatio
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