A. Frączyk

Surface temperature control using thermal image processing

Abstract In the paper the computerized system for the surface temperature control of the rotating cylinder has been presented. In the presented solution, an IR camera works as a source of information about the thermal state of cylinder surface for the rest of the system. The necessary image processing algorithm as a basis for a control algorithm has been developed. An algorithm for the automatic localization of the cold cylinder by an IR camera using a set of thermal markers and a fuzzy recognition algorithm was developed. It enables one to calibrate the system properly in various operating conditions.

Compensation of heat power generation delays in the induction heating system of a rotating steel cylinder

In this paper the problem of delayed heating power generation in the induction heating system applied for a rotating steel cylinder has been presented. The source of the delay along with the method of its identification based on analysis of the infrared image of cylinder surface temperature have been discussed. As a consequence, a simple compensation method of the delay has been proposed and experimentally verified. Streszczenie. W artykule przedstawiono zagadnienie opóźnień generowania mocy grzejnej w układzie indukcyjnie nagrzewanego wirującego walca stalowego. Omówiono źródła tych opóźnień oraz metodę ich identyfikacji na podstawie analizy obrazów termograficznych pola temperatury powierzchni walca. Następnie zaproponowano oraz doświadczalnie zweryfikowano prostą metodę kompensacji zidentyfikowanych opóźnień. (Kompensacja opóźnień generowania mocy grzejnej w układzie indukcyjnego nagrzewania wirującego walca stalowego).

Using Infrared Camera for Dynamic Properties Identification of Induction Heated Rotating Steel Cylinder

Abstract Using of precise temperature control method requires knowledge of the dynamic properties of the controlled system. It can be determined by applying infrared camera to the temperature measurement of controlled system. The article presents two models of induction heated rotating steel cylinder and the method of their parameters estimation.

Comparison of Methods for Determining the Thermal Conductivity in Induction Heated Industrial Rotating Calenders

Abstract In many technical applications it is necessary to know thermal diffusity and heat conduction in solids, liquids and gaseous. In case of solid bodies the experimental determination of those properties requires use of special laboratory stands which provides the appropriate initial and boundary conditions necessary to solve invert problems. In the paper two methods of determine thermal property of metals has been presented and discussed. First method is based on classical optimization methods and the second one by artificial neural network, which is trained with data from numerical model of investigated body. Both method were tested on real laboratory model.