Fatigue crack generation position detection device of test piece

摘要

(57) Abstract Objective The fatigue crack generation position detection device of the test piece is offeredru. Constitution Through 1st polarizing plate 2 from the illuminant 1, test piece 3To irradiate incident light IL on, reflected light RL from of test piece 3 2ndThrough polarizing plate 4, image pickup to do with camera 5, this camera 5And others analog picture signal analog/with digital converter 6After converting to the digital picture signal, in image processing section 7The image treating, the picture signal before the start of the test or immediately after thatBy calculating the change position of the brightness with by comparison, the test pieceIt to be possible to detect the crack generation position due to the fatigue test of 3ru.