躺滴法结合图像处理测量界面张力的方法  

INTERFACIAL TENSION MEASUREMENT BY SESSILE DROP METHOD COMBINING IMAGE ANALYSIS

作　　者：尚朝辉[1] 张贵才[1] 蒋平[1] 裴海华[1] 葛际江[1] 

机构地区：[1]中国石油大学石油工程学院,山东青岛266555

出　　处：《石油学报（石油加工）》2008年第6期744-748,共5页Acta Petrolei Sinica(Petroleum Processing Section)

基　　金：国家高技术研究发展专项(2006AA06Z227);国家高技术研究发展(863)计划(2007AA06Z201);新世纪优秀人才支持计划;霍英东教育基金会第十一届高等院校青年教师基金(优选资助课题)项目(114016)资助

摘　　要：采用躺滴法结合图像处理来测量界面张力较大体系的界面张力。为了提取图像中的有效信息,需要对获得的图像进行预处理。图像预处理包括图像的裁剪,以获得图像的核心部分;绘制出裁剪后图像的灰度直方图得到该幅图像的阈值;利用阈值法将图像二值化。对二值图像进行边缘检测得到其边界,再采用二次多项式拟合边界曲线,于是可以通过Bashforth-Adams方程计算得到该体系的界面张力。通过实验验证了该方法的计算结果具有较高的精度。The sessile drop method and digital image analytical method were combined to determine the interfacial tension of system with larger interfacial tension. In order to acquire the effective information, the image should first be treated. The image treatment included that the image was cut to get its main part, the histogram of the gray image was drawn to get its threshold, by which a binary image was obtained. With the border of the binary image obtained by detecting its edge the edge curve was matched by the second degree polynomial. According to classic Bashforth-Adams equation and the image edge curve, the interracial tension of the system could be computed. Moreover, the preferable computational accuracy of the image processing was verified by experiment.

关 键 词：界面张力 Bashforth-Adams方程 图像处理 躺滴法 

分 类 号：TP751[自动化与计算机技术—检测技术与自动化装置]