基于双光相机的光伏组件缺陷自动检测
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摘要
本文针对光伏组件的缺陷检测,提出一种基于双光相机的自动缺陷检测方法。通过离线标定建立双光相机间的单应性映射矩阵,在可见光图像上使用颜色阈值实现光伏组件分割,将分割掩模映射至热红外图像上,进而在热红外图像上的光伏组件内部检测缺陷。实验表明该方法可以有效降低缺陷误报率,提高检测准确度。
In this paper, a dual vision camera based solar panel defects detection method is proposed. Through offline calibration, the homography matrix between dual vision camera is calculated. Solar panels are segmented from the visible image based on color threshold. By mapping the mask image to the infrared image, defects can be detected inside solar panels. Experiments show that this method could effectively decrease false detection rate and increase the detection precision.
In this paper, a dual vision camera based solar panel defects detection method is proposed. Through offline calibration, the homography matrix between dual vision camera is calculated. Solar panels are segmented from the visible image based on color threshold. By mapping the mask image to the infrared image, defects can be detected inside solar panels. Experiments show that this method could effectively decrease false detection rate and increase the detection precision.
引文
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[2]杨康,李景天,刘祖明,等.光伏电站热斑测试研究[J].云南师范大学学报(自然科学版),2015(2):45-48.YANG Kang,LI Jing-tian,LIU Zu-ming,et al.Test research for hot spot of solar power system[J].Journal of Yunnan normal university(science),2015(2):45-58.
[3]杨博,谢小军,马茜溪,等.无人机检测光伏组件热斑效应的设计与实现[J].太阳能,2017(12):61-64.YANG Bo,XIE Xiao-jun,MA Qian-xi,et al.Design and realization of solar panel hot spot detection based on unmanned aerial vehicle[J].Solar energy,2017(12):61-64.
[4]刘江林.基于eLTE集群通信的光伏电站无人机自动巡检的研究[J].太阳能,2017(6):15-17.LIU Jiang-lin.Research on solar power station drone automatic inspection based on eLTE cluster communication[J].Solar energy,2017(6):15-17.
[5]王培珍,郑诗程.基于红外图像的太阳能光伏阵列故障分析[J].太阳能学报,2010(2):197-202.WANG Pei-zhen,ZHENG Shi-cheng.Solar array fault analysis based on infrared images[J].Journal of Solar energy,2010(2):197?202.
[6]ZHANG Z Y.A flexible new technique for camera calibration[J].IEEE transactions on pattern analysis and machine intelligence,2000(22):1330-1334.
[7]KANATANI K,OHTA N,KANATANI Y.Otimal homography computation with a reliability measure[J].IEICE transactions on information and systems,2000(7):1369-1374.
[8]卜文斌,游福成,李泉,等.一种基于大津法改进的图像分割方法[J].北京印刷学院学报,2015(4):76-78.BU Wen-bin,YOU Fu-cheng,LI Quan,et al.An improved image segmentation method based on Otsu[J].Journal of Beijing institute of graphic communication,2015(4):76-78.
[9]罗山,张冬梅.基于自适应阈值和形态学的改进分水岭分割算法[J].山西电子技术,2018(6):3-5.LUO Shan,ZHANG Dong-mei.Improved watershed segmentation algorithm based on adaptive threshold and mathematical morphology[J].Shanxi electronic technology,2018(6):3-5.
[10]王培珍,沈玉梁,杨维翰.太阳能光伏阵列的温度与红外特性分析[J].太阳能学报,2005(1):82-85.WANG Pei-zhen,SHENG Yu-liang,YANG Wei-han.Temperature and infrared feature analysis for solar array[J].Journal of Solar energy,2005(1):82-85.