Применение информационных технологий для автоматизации расчетов термодинамических характеристик поверхностного слоя

T. O. Levitskaya

doi:10.31498/2225-6733.29.2014.39298

Authors

T. O. Levitskaya State higher educational establishment "Priazovskyi state technical university", Mariupol, Ukraine

DOI:

https://doi.org/10.31498/2225-6733.29.2014.39298

Keywords:

surface properties, physical-chemical experiment, the experimental setup, the digital image, computer, segmentation, pattern recognition, linear filtering, the pixel intensity levels

Abstract

An experimental setup for studying the surface properties of steel melts, which in contrast to known systems, provided with an optical system and a PC that allow a digital image of drops lying obtained in experiments using fast processing software system that significantly reduces the time of the experiment, to store data and simplifies the work of the experimenter. For image acquisition unit is provided with a drop optical system configured to move in the horizontal and vertical planes. Optical image of the object is formed horizontal optical microscope Stemi SV 11, the use of which is necessary because the resources of the recording device is not possible to obtain a clear image. Next, using a black and white video camera SONY SPT-M308CE, the image is transmitted as an analog signal to image capture board (frame grabber) DATA TRANSLATION (DT-3155). Digitized image with a spatial resolution of 768x576 pixels and 256 gray levels is placed in the memory of a computer company Intel (6) for further processing using specially developed algorithms. Obtaining Profile drop in pixels allows very accurately determine the parameters such as contact angles, surface tension, the drop volume, etc. Since segmentation is a key step to help you find areas related to various objects in the image field, we carried out an analysis of existing methods and found that the most appropriate method for the analysis of digitized images sessile drop is the gradient method. It is based on the fact that at the boundary between two objects of different brightness is a sharp change in intensity, which can easily be fixed by calculating the gray level gradient whose direction is perpendicular to the interface objects

Author Biography

T. O. Levitskaya, State higher educational establishment "Priazovskyi state technical university", Mariupol

Кандидат технических наук, доцент

References

Харлашин П.С. Разработка новых составов шлакообразующих смесей для защиты металла во время непрерывной разливки стали // П.С. Харлашин, Т.А.Левицкая // Вісник Приазов. держ. техн. ун-ту : зб.наук. пр. – Вип. 25 . – Маріуполь. – 2012. – С. 20-26.

Измерение капиллярных характеристик расплавов телевизионной системой с ЭВМ / А.Г Амброк, С.А. Грузинцев, Э.Л. Лубе, В.В. Пеллер // Адгезия расплавов и пайка материалов. – 1984. – №12. – С. 12-13.

Телевизионная измерительная система на базе ЭВМ для исследования процесса роста по способу Степанова / С.А. Грузинцев, Э.Л. Лубе, А.Г. Амброк, В.В. Пеллер // Изв. АН ОХР. Сер. физ, – 1985. – №12. – С. 2324-2328.

Щербаков Л.М.. Об измерении краевых углов смачивания моноволокон / Л.М. Щерба-ков, Ф.Н. Сухарев // Адгезия расплавов и пайка материалов. – 1984. – №12. – С. 15-17.

Liggieri L. An automatic technique for measuring the surface tension of liquid metals / L. Liggieri, A. Passerone // High Temperature Technology. – 1989. – №7. – P. 82-86.

Rotenberg Y. Determination of surface tension and contact angle from the shapes of axisymmetric fluid interfaces / Y. Rotenberg, L. Boruvka, A.W. Neumann // J. Colloid and Interface Sci, – 1993. – №1. – P. 169-183.

Real time pendant drop tensiometer using image processing with interfacial area and interfa-cial tension control capabilities / G. Faour, M. Grimaldi, J. Richou, A. Bois // J. Colloid and Interface Sci, – 1996. – V. 181. –№1. – P. 385-392.

Hond-Kee Lee. Surface tension measurements of liquid iron-nickel-sulphur ternary system using the electromagnetic oscillating droplet technique / Lee Hond-Kee, G. Frohberg Martin, P. Haira Jnan // 1SIJ International. – 1993. –Vol. 33. – №8. – P. 833-838.

Andrien C. Average speading parameter on heterogeneous surfaces / C. Andrien, C. Sykes, F. Brochard // Langmuir. – 1994. – V. 10. –№7. – Р. 2077-2080.

Emelyanenko A.M. The role of discretization at the video image processing in sessile and pendant drop methods / A.M. Emelyanenko, L.B. Boinovich // Colloids and surfaces A: Physicochemical and Engineering Aspects. – 2001. – V. 189. – P. 197-202.

Алгоритм расчета плотности и поверхностного натяжения расплавов методом большой капли при формировании изображения в цифровом формате / Д.Ю. Аникин, М.Р. Филонов, С.В. Иванов, Ю.Б. Лёвин // Известия ВУЗов. Черная металлургия. – 2003. – №7. – С. 10-13.

А. с. 1744594 СССР, МПК G 01 М 13/02. Установка для определения плотности, поверхностного натяжения и краевого угла смачивания расплавленного материала / П.С. Харлашин. – №4754055; заявл. 31.10.89; опубл. 30.06.92, Бюл. №24. – 5 с.

Gonzalez R. Digital Image Processing / R. Gonzalez, R. Woods // Addison-Wesley Publ.Comp. – N.Y., 1993. – 1104 р.

Hansen F.K. Surface tension by pendant drop / F.K. Hansen, G. Rodsrud // J.Colloid Interface Sci. – 1991. – V. l4l. –№1. – P. 1-9.

Robust digital image analysis of pendant drop shapes / D.B. Thiessen, D.J. Chione, C.B. McCreary, W.B. Kiantz // J.Colloid Interface Sci. – 1996. – V. 177. – №2. – P. 658-665.

Correlation of line tension and solid-liquid interfacial tension from the measurement of drop size dependence of contact angles / D. Duncan, D. Li, J. Gaydos, A.W. Neumann // J. Colloid Interface Sci. – 1995. – V. I 69. – №2. – P. 212-217.

Li D. Contact angle measurement by axisymmetric drop shape analysis / D. Li, P. Cheng, A.W. Neumann // Adv. Colloid Interface Sci. – 1992. – V. 39. – №2. – P. 347-382.

Rotenberg Y. Determination of surface tension and contact angle from the shapes of axisymmetric fluid interfaces / Y. Rotenberg, L. Boruvka, A.W. Neumann // J. Colloid and Interface Sci, – 1993. – №1. – P. 169-183.