Conical-cavity fiber optic sensor for temperature measurement in a steel furnace

Paolo G. Cielo; Jean-Claude Krapez; M. Lamontagne; J. G. Thomson; Michael G. Lamb

doi:10.1117/12.58530

1 April 1992 Conical-cavity fiber optic sensor for temperature measurement in a steel furnace

Paolo G. Cielo, Jean-Claude Krapez, M. Lamontagne, J. G. Thomson, Michael G. Lamb

Proceedings Volume 1682, Thermosense XIV: An Intl Conf on Thermal Sensing and Imaging Diagnostic Applications; (1992) https://doi.org/10.1117/12.58530
Event: Aerospace Sensing, 1992, Orlando, FL, United States

Abstract

An integrating-cavity sensor for temperature measurement of the steel sheet in a continuous annealing furnace is described. The sensor includes a fiber optic cable for transmission of the infrared radiation from the sensor head within the furnace to the double-wavelength detection unit located outside the furnace. The sensor head includes a reflecting conical cavity positioned above the steel sheet in order to increase, and thus stabilize, the effective infrared emissivity of the sheet surface as well as to reduce spurious reflections from other sources within the furnace. The fiber optic cable is both decentered and tilted with respect to the cavity axis in order to minimize straight-reflection losses through the fiber cable gate. Preliminary results after in-furnace installation will be described.

Citation Download Citation

Paolo G. Cielo, Jean-Claude Krapez, M. Lamontagne, J. G. Thomson, and Michael G. Lamb "Conical-cavity fiber optic sensor for temperature measurement in a steel furnace", Proc. SPIE 1682, Thermosense XIV: An Intl Conf on Thermal Sensing and Imaging Diagnostic Applications, (1 April 1992); https://doi.org/10.1117/12.58530

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