| 摘要 |
There is provided a crack detection system in which a crack can properly be detected from a strain distribution of a part to be detected, as acquired without destroying a coating layer of the part to be detected, by applying heat to the part to be detected of a detection object, and analyzing, by a digital image correlation method, images as taken before and after applying the heat to the coating layer of the part to be detected.
After taking the image of the part 51 to be detected of the detection object 50 by the imaging unit 10, the heat is applied by the heating unit, and change of the part to be detected, by heat, is also caused on the other surface side through the outer coating surface of the part to be detected, which is to be moved together with the part to be detected. Accordingly, images of every portions of the coating surface of the part to be detected are taken and the image analysis unit 30 analyzes the images before and after applying the heat to acquire a strain distribution of the part to be detected, so that the crack can be detected based on difference in a state of strain between a place where the crack exist and the other place.
Therefore, taking the images of the part to be detected including its coating layer enables the analysis to progress without any problems to detect the crack, without removing the coating layer, thus improving the work efficiency of the detection operation. |
