抄録
A demonstration system for detecting and visualizing a small amount of oil leakage from a transformer was developed. The system uses a method of detecting fluorescence emitted from oil when it is irradiated by black light. Image processing using the relationship between saturation and intensity in a hue-saturation-intensity color space is used for recognizing the oil leakage from the background in the image obtained by the black-light irradiation. According to the saturation-intensity relationship, the intensity of a surface without oil adhesion linearly increases as saturation increases. Points on the surface of a plate flange (representing the surface of the transformer) belonging to the oil showed higher intensity than that of the surface without oil adhesion. An algorithm for automatically setting a threshold value line to recognize the oil, considering the distribution range of the intensity at each saturation value, was constructed. The developed system using this algorithm can detect and visualize oil leakage from a transformer at an amount of less than 1mL.
