DEVELOPMENT AND RESEARCH OF A MEASURING SYSTEM FOR DETERMINING THE TEMPERATURE OF HOT METAL

Abstract

Obtaining a slab with minimal indicators of scale contamination and energy resource losses is an urgent task of metallurgical production. The work is devoted to improving the quality of rolled products by modernizing and studying the automated system for monitoring the quality of cleaning the slab surface from primary scale. This will allow the condition control system to implement an adaptive algorithm for controlling the hydraulic hammering parameters based on the results of assessing the quality of the slab surface. For this purpose, an optical system for remote monitoring of the temperature of rolled products with a thermal imager as the primary transducer was studied. The calculated dependencies were obtained that describe the change in radiation power from the length of the optical channel and the magnitude of external disturbing factors. Analytical expressions were also obtained and a method for calculating the static characteristics of the thermal imager depending on the characteristics of the optical signal propagation medium and the emissivity of certain steel grades was developed. It was theoretically proven that the diagram of the emitted signals has a wide directivity, so the measurement results practically do not depend on the angle and distance of the device installation to the control object. It was found that to ensure high accuracy of temperature measurement, there is a need for experimental verification of the radiation coefficients of a number of materials in order to determine the actual value of the attenuation of the information signal energy, as well as to adjust the optimal channel length. The conducted studies prove the adequacy of the developed models and indicate that the proposed primary converter for temperature control based on a thermal imager can be effectively used in systems for remote temperature control of rolled metal