高电压技术2013，Vol.39Issue(1)：24-30,7.DOI:10.3969/j.issn.1003-6520.2013.01.004
修正的圆拟合法及在硅橡胶憎水性检测中的应用
Modified Circle Fitting Algorithm and Its Application in Hydrophobicity Detection of Silicone Rubber
摘要
Abstract
To improve the accuracy of static contact angle measurements of silicone rubber material, a modified circle fitting algorithm is proposed. Based on water drop profiles numerically generated by the Young-Laplace equation, the influence of the water drop volumes and contact angles on the accuracy of the circle fitting algorithm is studied, while having the volume of these water drops less than 1 000 μL, contact line less than 2 cm, and the static contact angle within a range of 5°～179°. The results indicate that the calculation error of the circle fitting algorithm increases with the water drop volume, and the maximum error could be larger than 100°. The calculation result is corrected by a linear two-dimensional interpolation, and it is concluded that the result could be properly corrected, with the same water drop volume and contact line length as mentioned above. Using the proposed algorithm to calculate the contact angles of numerically generated water drop images and real water drop images of silicone rubber with different hydrophobicities and water drop volumes, the results verifies the effectiveness of the proposed algorithm, with the maximum error of simulated results less than 1°. Moreover, the proposed algorithm could be relatively easily implemented while having less computational burden. The proposed algorithm can also be applied to calculate the static contact angle of other materials.关键词
硅橡胶/憎水性/静态接触角/圆拟合/修正/水珠体积/Young-Laplace方程Key words
silicone rubber/ hydrophobicity/ static contact angle/ circle fitting/ correction/ water drop volume/ Young-Laplace equation引用本文复制引用
徐志钮..修正的圆拟合法及在硅橡胶憎水性检测中的应用[J].高电压技术,2013,39(1):24-30,7.基金项目
特高压工程技术(昆明、广州)国家工程实验室开放基金(NEL201215) （昆明、广州）
中央高校基本科研业务费专项资金(11MG42). （11MG42）
