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1. (WO2016059812) OIL LEAKAGE DETECTION DEVICE AND METHOD

Pub. No.:    WO/2016/059812    International Application No.:    PCT/JP2015/059542
Publication Date: Fri Apr 22 01:59:59 CEST 2016 International Filing Date: Sat Mar 28 00:59:59 CET 2015
IPC: G01M 3/38
G01N 21/64
H01F 27/00
Applicants: HITACHI, LTD.
株式会社日立製作所
Inventors: LU Li
呂 莉
ROKUNOHE Toshiaki
六戸 敏昭
MORIYAMA Tomohiro
森山 智広
NUKAGA Jun
額賀 淳
YAMAGISHI Akira
山岸 明
SAITO Yasutomo
齋藤 泰智
Title: OIL LEAKAGE DETECTION DEVICE AND METHOD
Abstract:
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.