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27 June 2002 Optical fiber transducer for monitoring the cooling profile of iron-steel bars
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On the steel production industry, a mixture of selected scrap and pellets of DRI is put into the furnace according to the desired quality of steel. The quality of the iron steel bars, among other, depends on the temperature profile during the cooling and solidifying process. A new multipoint high temperature transducer based on the optical power collected by a group of multimode optical fibers has been developed for measuring the transversal cooling profile. The optic fibers are adequately sheathed by a ceramic mixture in order to achieve its mechanical and thermal protection. Besides in order to use the transducer in pollution environments, the probe is putted inside of a close chamber with a window made with a vitreous ceramic material. The use of silica fiber optic limits the spectral range to analyze, and the measured temperature range. The behavior of the transducer from the angle, the distance and the change of emissivity have been measured, and the transducer has been optimized. The transducer was calibrated in the Photonics Engineering Group laboratory and it was installed in a iron-steel bar manufacturing plant in Spain where it is working high relative humidity and high temperature environment.
© (2002) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Francisco J. Madruga, Victor Alvarez, Daniel A. Gonzalez, Juan Echevarria, and Jose Miguel Lopez-Higuera "Optical fiber transducer for monitoring the cooling profile of iron-steel bars", Proc. SPIE 4694, Smart Structures and Materials 2002: Smart Sensor Technology and Measurement Systems, (27 June 2002);

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