| 摘要 |
PROBLEM TO BE SOLVED: To provide a method and device for detecting a spark, and a method of manufacturing welded products. SOLUTION: This method for detecting the spark of welding is provided with an image picking-up step for picking up the luminous state which is generated in the weld zone during welding, an extracting step for extracting the intensity of a blue component from a picked-up picture and a judging step for judging the spark from the intensity of the blue component. COPYRIGHT: (C)2009,JPO&INPIT
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