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公开(公告)号：JP4657267B2
公开(公告)日：2011-03-23
申请号：JP2007209481
申请日：2007-08-10
Applicant: トヨタ自動車株式会社
CPC classification number: B23K26/032 , B23K26/706
Abstract: A first image formation point for a workpiece is provided between a camera and the workpiece. An image of the workpiece is formed at the first image formation point, and picked up by the camera. Meanwhile, an image for a protection glass is not formed at the first image formation point, and is instead diffused and then picked up by the camera. For this reason, an image caused by dirt on the protection glass is diffused. As a result, in the image picked up by the camera, images due to dirt become few and images due to the workpiece become relatively many. Therefore, the accuracy of an evaluation on the quality of the workpiece can be improved.
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公开(公告)号：JP4300433B2
公开(公告)日：2009-07-22
申请号：JP2007210231
申请日：2007-08-10
Applicant: トヨタ自動車株式会社
CPC classification number: B23K26/032 , B23K31/125
Abstract: A difference processing circuit 22 receives input of welding images taken by a CCD camera 8 in real time and then differentiates power monitoring images recorded in a memory 21 from welding images to obtain difference processing reflected light images. Due to the difference processing performed by a difference processing circuit 22, foreign matter images included in welding images and power monitoring images are eliminated and the difference processing reflected light images that are obtained do not include any foreign matter images. A quality judgment device 17 uses the difference processing reflected light images obtained by a difference processing circuit 22 and conducts a quality judgment. As described above, since difference processing reflected light images do not include any foreign matter images, a quality judgment device 17 does not receive any influence from the foreign matter that is adhered to the protective glass 15 and can conduct an excellent evaluation of the welding quality.
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