Applications Of Image Processing And Numerical Analysis In The Billet Reheating Furnace

China has been the development of standards are to industrialization, and the development of the steel industry is a top priority, the current development situation of the domestic steel industry is still relatively optimistic, but compared with developed countries, the gap is still very large. Therefore, to further improve the quality and craftsmanship of steel is urgent, the only way to improve the country’s competitiveness in the steel industry, in order to better develop their economic level, to improve the overall comprehensive national strength, to achieve a real sense of wealthy and strong.At The present study, the most important is the temperature of the steel surface, and the method is probably all get around the hearth reheating furnace atmosphere temperature by using a thermocouple, and then get through the long-term projections of the empirical formula of the surface temperature of the steel, and then combined heat transfer relevant knowledge to use in a number of industrial computing software universal access to the desired temperature. Because of the reason, resulting in the actual production process, the surface temperature of the steel obtained through empirical methods, because of various factors of the apparatus and the surrounding environment and the anisotropy of the steel material itself part of the error factors such as the presence of. So, to get the exact surface temperature of the steel reheating furnace and derive its internal temperature, has been a research departments and areas of expertise. Over the last decade, with the rapid development of innovative materials science and computer application technology and the photoelectric detection technology, infrared temperature measurement technology has been widely colorimetric development and application of in various research areas and directions. Prior research papers related to temperature, we adopted the dual-wavelength infrared temperature measurement using colorimetric method to bloom among the walking beam furnace, thereby directly measured surface temperature Bloom’s. However, soaking in a walking beam furnace in the segment, because of the nature of the steel itself oxidation loss will be "fish scale" for this problem previously discussed mainly how to avoid oxidation burning. About the same time taking into account the anisotropy and the thermal conductivity of the material reality of the steel evolving range of issues related to the treatment but did not make a direct deal with the uniformity of the material considered that the relevant papers convincing enough. Finally, through the analysis of the finite element method and the method of combining heat conduction of heat conducted from the surface to the interior blank bloom conduction process real-time temperature finite element analysis, the final combined billet surface temperature and finite element simulation of real-time monitoring to obtain access to the the temperature of the center. However, based on the results of the above study on how to get real-time through numerical analysis and steel in both temperature hot and heated section and the center of the bloom time synchronization problems and no detailed research and discussion.In this thesis, Planck’s law from the knowledge and infrared radiometry departure, which specifically includes heat transfer equations and some additional initial and boundary conditions. Then, starting from the digital image analysis and comparison of several algorithms, burning through the oxidation process, we get a grayscale image obtained by CCD. Then explain used colorimetric dual wavelength infrared temperature measurement system, as well as real-time monitoring of the temperature of the entire process, a single optical path colorimetric infrared temperature measurement system and some major related hardware, such as:optical engineering systems, photoelectric conversion device, modules and other image acquisition and analysis process; as best match dual wavelength combinations colorimetric method on infrared temperature measurement taken; As for the method the best match on the infrared temperature measurement taken colorimetric dual wavelength combinations; while using three filtering methods to reduce ambient noise and hot device generates, namely:Multi-Figure average, mean filtering and median filtering a series of relevant content is not described in detail here (before the relevant papers have been described in detail). In this thesis focused on detailed analysis of several gray-scale image processing algorithms, and finally through the analysis of heat conduction process billet finite element method, the dual-wavelength colorimetric method for the monitored temperature Real-time surface temperature billet billet heat conduction process considered the first boundary conditions established by the idea of differential time and the surface temperature of the center as well as the mathematical model, the final results of the results obtained with the thermocouple match production to meet demand.