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Vision systems
Online CCD monitoring is an additional method offered by LPKF Laser & Electronics AG, Plastics Welding Division. This method is already widely used for QA in industrial manufacturing. It can be used for monitoring the weld quality of materials that provide a sufficiently high level of contrast, such as opaque/black materials. Such a monitoring system can be easily integrated especially for contour welding processes.
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 The figure shows the photograph of a bubble in the weld seam as seen by a CCD camera. In this way the smallest faults in the weld seam can be successfully recognized with a corresponding evaluation algorithm. In addition, the monitoring system can analyze the width of the weld seam and use it as additional quality criteria.
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