憎水性材料表面液滴面积分析方法  

Droplet Area Measurement Method for Hydrophobic State Description

作　　者：李杰 周志成 高嵩 戴罕奇[2] 赵晨龙[2] 王黎明[2] 

机构地区：[1]国网江苏省电力公司电力科学研究院,南京211002 [2]清华大学深圳研究生院,深圳518055

出　　处：《高电压技术》2017年第5期1518-1525,共8页High Voltage Engineering

基　　金：国家电网公司科技指南项目(编号略)~~

摘　　要：液滴面积是表征材料表面憎水性的有效方法,因而介绍了适用于复合绝缘材料污层憎水性能状态描述的液滴面积测量软件开发流程,着重阐述了图像识别液滴形态各个关键环节的核心算法。软件开发的图像处理环节采用拉普拉斯高斯算子,先以高斯低通滤波器平滑处理图像信号,再以拉普拉斯算子高通滤波实现目标对象边界提取。依据人工污秽试验特点,合理设置灰度阈值等手段,将液滴图像与背景图像实现分离。并在此基础上开展了复合绝缘子人工污秽试验研究,以液滴面积最大值代表污层的憎水性能。研究表明使用LOG算子,并结合靛蓝液滴,可以有效提高液滴面积法在污层憎水性能状态描述中的精度,并可应用于复合绝缘子人工污秽试验中憎水性的精细化分析。Droplet area is an effective method to characterize the hydrophobicity of the material surface. Consequently, we introduced the development process of droplet area measurement software, which was used for studying hydrophobic state of pollution layer on composite materials. A core algorithm corresponding to the each step of image recognition droplet morphology was explained. In the course of software development, Laplace-Gauss operator （LOG） was used for image processing. Firstly, a Gauss low-pass filter was used to smoothen the image signals. Then, a Laplacian high-pass filter was used to extract the edge of the target object. According to the features of artificial pollution tests, reasonable grayscale threshold was set automatically to separate droplet image form the whole picture. Based on the droplet area software successfully development, artificial pollution tests of composite insulators were carried out. Droplets area was used for representing the hydrophobicty strength of pollution layer. The research shows that the LOG operator, combined with the indigo droplet, can effectively improve the accuracy of drop area method in pollution layer hydrophobic state description. Precise analysis can be applied to the hydrophobicity of composite insulators in the artificial pollution test.

关 键 词：图像识别 拉普拉斯高斯算子 复合绝缘子 液滴面积 污闪 憎水性 

分 类 号：TB306[一般工业技术—材料科学与工程] TP391.41[自动化与计算机技术—计算机应用技术]