Dent and quality inspection on bottles, cans and detergent packaging
While the container makes one full turn at the station, a laser profile sensor scans its side wall. The profiles are assembled into an unwrapped deviation map; dents and deformation show up as radial deviation from the reference shape.
Deviation by angle and maximum deviation are sent to the display. The out-of-tolerance container is pushed through the chute into the bin at the following rejection station.
- 01 Index
- 02 Scan
- 03 Analysis
- 04 Decide
The dial table indexes the next container to the station in front of the sensor.
- Rotation
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- Max. deviation
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Scenes are illustrative simulations; they are not customer references or performance guarantees.
Need
Print and metallic reflections change the appearance of a dent with viewing angle. Surface geometry must be measured around the container to distinguish circumferential shape errors from the label pattern.
Solution approach
A profile sensor with a vertical laser line measures the side wall while the container rotates on its axis. Profiles collected by angle are compared with the nominal contour; an unwrapped deviation map and radial curve reveal inward deformation.
Process steps
- 01
Index
The dial table indexes the next container to the station in front of the sensor.
- 02
Scan
The container makes one full turn; the laser line yields a side-wall profile at each angle.
- 03
Analysis
The profiles are unwrapped into a deviation map; regions off the reference are located.
- 04
Decide
The largest radial deviation is compared with the tolerance band.
Related applications
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