冰面放电的纹影图像处理及折射率场重建方法  

Schlieren Image Processing and Refractive Index Field Reconstruction Method for Ice Surface Discharge

作　　者：孟维[1,2] 胡建林 王子甲[1] 邓鸿飞 王文淞 张翕 叶明镜 蒋兴良 MENG Wei;HU Jianlin;WANG Zijia;DENG Hongfei;WANG Wensong;ZHANG Xi;YE Mingjing;JIANG Xingliang(Xuefeng Mountain Energy Equipment Safety National Observation and Research Station of Chongqing University,Chongqing 400044,China;Key Laboratory of Environmental Protection of Guangdong Power Grid Co.,Ltd.,Electric Power Research Institute of Guangdong Power Grid Co.,Ltd.,Guangzhou 510080,China)

机构地区：[1]重庆大学雪峰山能源装备安全国家野外科学观测研究站,重庆400044 [2]广东电网有限责任公司电网环保重点实验室(广东电网有限责任公司电力科学研究院),广州510080

出　　处：《南方电网技术》2024年第8期124-130,共7页Southern Power System Technology

基　　金：国家自然科学基金资助项目(51637002)。

摘　　要：相比于电流、电压等传统测量方法,利用纹影技术拍摄得到的冰面局部电弧等放电的图像更加直观,其图像处理和折射率场重建是定量分析放电的几何尺寸、密度、粒子分布等物理特性的基础。从放电通道的光偏折特性出发,介绍了利用纹影成像技术测量放电通道的原理;提出了一套覆冰表面放电通道的图像处理和折射率场数值重建方法,通过数值实验验证了算法准确性。实测结果表明,所设计的纹影系统空间分辨率为10~100μm/像素可调、时间分辨率为1~38.45μs可调;提出的折射率场重建方法具有较高精度,能够有效得到冰面局部电弧形成过程中各个放电阶段的折射率场。Compared with traditional measurement methods such as current and voltage,the image of the partial arc on ice surface captured by schlieren technology is more intuitive.Its image processing and refractive index field reconstruction are the basis for quantitative analysis of physical characteristics such as geometric size,density and particle distribution of discharge.Based on the optical deflection characteristics of the discharge channel,the principle of measuring the discharge channel by schlieren imaging technology is introduced.A set of image processing and refractive index field numerical reconstruction method for the discharge channel on the icing surface is proposed.The accuracy of the method is verified by numerical experiments.The results show that the designed schlieren system has a spatial resolution of 10~100μm/pixel and a temporal resolution 1~38.45μs.The proposed refractive index field reconstruction method has high accuracy and can effectively obtain the refractive index field in each discharge stage of ice partial arc formation.

关 键 词：纹影法 放电通道成像 折射率场重建 冰面放电 

分 类 号：TM752[电气工程—电力系统及自动化] TM835.4