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US 11,959,811 B2Granted
Temperature sensors
AssigneesSSAB Enterprises, LLC, Iowa State University Research Foundation, Inc.
InventorsMeng Lu, Jingjing Qian, Sunday O. Abraham, Randy Petty, Matthew J. Werner
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Abstract
A temperature sensor including a sapphire optical fiber and a nanoporous cladding layer covering at least a portion of the sapphire optical fiber.
Claims24
A temperature sensor comprising:
- a sapphire optical fiber structured to produce a thermal emission representative of a molten steel into which the temperature sensor is inserted;
- a nanoporous cladding layer covering at least a portion of the sapphire optical fiber;
- a refractory housing covering at least a portion of the nanoporous cladding layer;
- an air gap fully-circumferentially around the sapphire optical fiber, the air gap separating the sapphire optical fiber from the refractory housing;
- and
- a spectrometer coupled to the sapphire optical fiber and configured to receive the thermal emission and to generate, in response, a radiation spectrum indicative of a temperature of the molten steel.
3 more elements
A temperature sensor comprising:
- a sapphire optical fiber structured to produce a thermal emission in response to exposure to a heated material;
- a spectrometer coupled to the sapphire optical fiber and configured to generate a radiation spectrum based on the thermal emission;
- a first alumina layer proximate the optical fiber, the first alumina layer comprising a nanoporous material;
- and
- a second alumina layer proximate the first alumina layer, the second alumina layer being thicker than the first alumina layer,
- wherein an air gap is included around a distal end of the sapphire optical fiber, the air gap separating the distal end the sapphire optical fiber from a distal end of the first alumina layer.
3 more elements
Dependencies are inferred from the claim text.