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|1. (WO2016059812) OIL LEAKAGE DETECTION DEVICE AND METHOD|
|Title:||OIL LEAKAGE DETECTION DEVICE AND METHOD|
Without increasing device complexity, the present invention achieves an oil leakage detection device and method that have high detection accuracy and remove the influence of noise light. An oil leakage detection device is configured from: sources (1a, 1b) of ultraviolet light including a wavelength that excites oil that are disposed so as to illuminate an oil-filled device from a plurality of different angles of incidence and light and turn off in order at each of the angles of incidence; an imaging device (2) that, during the lighting, images the oil-filled device irradiated by the ultraviolet light from the ultraviolet light sources (1a, 1b); a recording unit (4) for recording the images imaged by the imaging device (2); and a display unit (5) for displaying the images. The images are compared, a region having an unchanging light emission position is determined to be an oil leakage region, and a region that has both cases of light emission and no light emission is determined to be a noise light region.