| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide an inspection method of a spark plug capable of detecting a protrusive adherent matter with high precision when generated by welding, providing products with high quality, effectively attaining the improvement of the yield or the like. <P>SOLUTION: An allowable area allowing the existence of an outline L<SB>2</SB>of a work to be detected and an unallowable area not allowing the existence of an outline L<SB>2</SB>of a work to be detected are set on the periphery of an external surface outline L<SB>2</SB>(outline L<SB>2</SB>of the work to be detected) of the joining work member 10, depending on the shape of the outline (standard outline) of a standard work member serving as a standard of a joining work member, to judge the existence of the outline L<SB>2</SB>of the work to be detected at the unallowable area. Concretely, a detection line as a boundary of the allowable area and the unallowable area is registered as a shape of following the standard outline in advance, and generates a detection line 102' corresponding to the outline L<SB>2</SB>of the work to be detected depending on the positional relation of the detection line and the standard outline. The detection lines 102' and the outline L<SB>2</SB>of the work to be detected are made to correspond with each other on one image, and the existence of the outline L<SB>2</SB>of the work to be detected on the detection lines 102' is judged. <P>COPYRIGHT: (C)2004,JPO&NCIPI |
