| 摘要 |
PROBLEM TO BE SOLVED: To provide a side face imaging method and a side face observation device of a coil-shaped steel strip capable of imaging excellently the side face of the coil-shaped steel strip having winding disturbance, wherein a spot having a greatly different reflectance is mixed. SOLUTION: In this side face imaging method of the coil-shaped metal strip, the side face of the steel strip wound in a coil shape is irradiated with light from an illumination device and the irradiated side face of the steel strip is imaged by an imaging device, and the imaged image is displayed on a display device, and a defect and/or a shape failure generated in a width end of the steel strip are inspected based on the displayed image. The illumination device and the imaging device are installed separately from the side face of the steel strip as long as a distance L shown by the inequality: L≥y×D/(2d), wherein y is an estimated irregularity depth caused by winding disturbance of coil-shaped steel strip, D is a radius of the coil-shaped steel strip, and d is the thickness of the steel strip. COPYRIGHT: (C)2010,JPO&INPIT |
