| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To provide a method and device for inspecting automatically the presence of micro irregularity on a surface at a low cost, as to an inspected object having the surface of nonspecular face such as rolled band steel. <P>SOLUTION: In this surface irregularity inspection method and device for inspecting the presence of the micro irregularity 15 on the surface 2 of the inspected object 1, an infrared ray emitting source 3 having a linear shape is arranged in the vicinity of the inspected object 1, an image 10 of the infrared ray emitting source reflected on the surface 2 of the inspected object is picked up by an infrared imaging device 5, and the presence of the micro irregularity 15 on the surface 2 of the inspected object is inspected based on a shape of the picked-up image 10 of the infrared ray emitting source. The infrared ray emitting source 3 having the linear shape is a plurality of linearly extended heating wires. A nonlinear shape of inspected object surface portion is determined as a micro irregularity generation part, in the picked-up image 10 of the infrared ray emitting source. <P>COPYRIGHT: (C)2005,JPO&NCIPI</p> |
