Optic fiber sensor for high-temperature molten metal measurement based on double-color pyrometer

Kunlun Zhu; Huanyi Li; YinWen Lin

doi:10.1117/12.169938

9 March 1994 Optic fiber sensor for high-temperature molten metal measurement based on double-color pyrometer

Kunlun Zhu, Huanyi Li, YinWen Lin

Proceedings Volume 2070, Fiber Optic and Laser Sensors XI; (1994) https://doi.org/10.1117/12.169938
Event: Optical Tools for Manufacturing and Advanced Automation, 1993, Boston, MA, United States

Abstract

A new kind of fiber optic high-temperature sensor for molten metal is presented in this paper. It is composed of a hollow tube and an optic fiber. When the bottom part of the sensor is inserted to the molten metal, the optical fiber receives and transmits the radiation powers emitting from the molten metal surface. Then the temperature of the surface is measured by a double-color pyrometer, based on the assumption that emissivities in used wave band approach each other by using the hollow tube. Regardless of the surface emissivity approaching black body or not, the results of approximating gray body when the sensor is inserted into the molten metal obviated the effect of the uncertain emissivity on temperature measurement.

Citation Download Citation

Kunlun Zhu, Huanyi Li, and YinWen Lin "Optic fiber sensor for high-temperature molten metal measurement based on double-color pyrometer", Proc. SPIE 2070, Fiber Optic and Laser Sensors XI, (9 March 1994); https://doi.org/10.1117/12.169938

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