Title

AUTOMATED 3D SURFACE INSPECTION SYSTEM – UNVEILING THE INVISIBLE

AUTOMATED 3D SURFACE INSPECTION SYSTEM – UNVEILING THE INVISIBLE

Authorship

Köpsel, Thomas

Köpsel, Thomas

I am this author

DOI

10.5151/2594-5297-34242

Downloads

Abstract

IMS SURCON 3D SURFACE INSPECTION SYSTEMS HAVE SUCCESSFULLY APPLIED LASER TRIANGULATION TECHNOLOGY FOR RELIABLY EVALUATING THE SURFACES OF CASTED MATERIALS. USING ALONE VISUAL INFORMATION ON THOSE SURFACES CAN BE HIGHLY MISLEADING AND GENERATE UNWANTED FALSE ALARMS. TO WORSEN THE SITUATION, TRIALS HAVE PROVED THAT MANY DEFECTS CANNOT BE DETECTED BY BRIGHTNESS INFORMATION ALONE. THIS NEW APPROACH USES FAST 3D CAMERAS AND LASERS TO DETERMINE DEPTH INFORMATION AS WELL. A HIGH-RESOLUTION DEPTH MAP OF THE SURFACE MAKES MANY DEFECTS NOT ONLY DETECTABLE FOR THE FIRST TIME, BUT ALSO ALLOWS TO OBJECTIVELY EVALUATE THE SEVERITY OF A DEFECT BASED ON ITS DIMENSIONS AND DEPTH. FOR AUTOMATED CLASSIFICATION, THE SYSTEM USES MULTIPLE CLASSIFIERS IN PARALLEL. THE RESULT IS THEN DECIDED VIA MAJORITY VOTE USING ALL THOSE CLASSIFIERS. THIS ALLOWS HIGHLY ROBUST CLASSIFICATION RESULTS THAT BENEFIT FROM USING DEPTH AND BRIGHTNESS INFORMATION AT THE SAME TIME. SEVERAL CHALLENGES HAD TO BE MASTERED TO DEVELOP THIS TECHNOLOGY FOR HOT CASTING ENVIRONMENTS. DOUBLE-WALLED, WATER-COOLED HOUSINGS PROTECT THE INSIDE FROM HEAT RADIATION, WHILE EXTERNAL AIR SUPPLY ENSURES STABLE CONDITIONS ON THE INSIDE. HEAT HAZE THREATENS TO DISTURB THE IMAGE LEADING TO FALSE DEPTH DATA. THIS IS PREVENTED USING POWERFUL BLOWERS THAT GUARANTEE STABLE AIR CONDITIONS IN THE FIELD OF VIEW OF THE CAMERAS AND LASERS.

IMS SURCON 3D SURFACE INSPECTION SYSTEMS HAVE SUCCESSFULLY APPLIED LASER TRIANGULATION TECHNOLOGY FOR RELIABLY EVALUATING THE SURFACES OF CASTED MATERIALS. USING ALONE VISUAL INFORMATION ON THOSE SURFACES CAN BE HIGHLY MISLEADING AND GENERATE UNWANTED FALSE ALARMS. TO WORSEN THE SITUATION, TRIALS HAVE PROVED THAT MANY DEFECTS CANNOT BE DETECTED BY BRIGHTNESS INFORMATION ALONE. THIS NEW APPROACH USES FAST 3D CAMERAS AND LASERS TO DETERMINE DEPTH INFORMATION AS WELL. A HIGH-RESOLUTION DEPTH MAP OF THE SURFACE MAKES MANY DEFECTS NOT ONLY DETECTABLE FOR THE FIRST TIME, BUT ALSO ALLOWS TO OBJECTIVELY EVALUATE THE SEVERITY OF A DEFECT BASED ON ITS DIMENSIONS AND DEPTH. FOR AUTOMATED CLASSIFICATION, THE SYSTEM USES MULTIPLE CLASSIFIERS IN PARALLEL. THE RESULT IS THEN DECIDED VIA MAJORITY VOTE USING ALL THOSE CLASSIFIERS. THIS ALLOWS HIGHLY ROBUST CLASSIFICATION RESULTS THAT BENEFIT FROM USING DEPTH AND BRIGHTNESS INFORMATION AT THE SAME TIME. SEVERAL CHALLENGES HAD TO BE MASTERED TO DEVELOP THIS TECHNOLOGY FOR HOT CASTING ENVIRONMENTS. DOUBLE-WALLED, WATER-COOLED HOUSINGS PROTECT THE INSIDE FROM HEAT RADIATION, WHILE EXTERNAL AIR SUPPLY ENSURES STABLE CONDITIONS ON THE INSIDE. HEAT HAZE THREATENS TO DISTURB THE IMAGE LEADING TO FALSE DEPTH DATA. THIS IS PREVENTED USING POWERFUL BLOWERS THAT GUARANTEE STABLE AIR CONDITIONS IN THE FIELD OF VIEW OF THE CAMERAS AND LASERS.

Keywords

3D SURFACE INSPECTION – LASER PROFILE– SLAB – HEAVY PLATE – BEAM – BILLET

3D SURFACE INSPECTION – LASER PROFILE– SLAB – HEAVY PLATE – BEAM – BILLET