应用图像边缘检测方法在线监测输电线路覆冰厚度研究

On-line Monitoring of Icing-thickness on Transmission Line with Image Edge Detecting Method

讨论了用基于小波的图像边缘检测方法在线监测输电线路覆冰厚度的原理,提出了一种新的输电线路导线与绝缘子覆冰厚度的在线监测方法,即通过对安装在高压铁塔上的摄像机和图像采集卡获得的导线与绝缘子覆冰图像进行实时处理,提取其边界轮廓来测量导线与绝缘子上的覆冰厚度。主要对测量系统中的图像处理过程步骤作了说明,重点论述了通过提取边界轮廓来测量覆冰厚度的算法的实现,并在实验室的人工气候室中进行了试验验证。试验结果表明,该输电线路覆冰厚度在线监测方法测量精度高,监测可靠,可应用于高压输电线路覆冰厚度的在线监测。

The principle of icing-thickness on-line monitoring of transmission line based on image edge detecting through wavelet transform is described, and a new method of on-line monitoring icing-thickness on transmission line is proposed. In this method, the pictures of iced transmission line and insulators taken by the camera on iron tower are processed immediately to extract the edges of transmission line and insulators, thus icing-thickness can be gained. The processing detail of the pictures in the monitoring system is discussed, and the implementation of the image edge extracting algorithm for calculating icing-thickness is described. An experiment in artificial climate chamber is conducted to verify the method, and the result shows that the proposed method performs well in accuracy and reliability, which infers the method can be used to on-line monitor icing-thickness on transmission line.