Steel Mill Hole Detector
This vision system for BlueScope Steel finds holes in rolling mill products that are up to 1.6m wide,
with holes down to 0.5mm at rolling speeds of 200m/min.
It reports the size and position of holes and virtually eliminates the shipment of bad products
who require a contiguous sheet, such as canned food producers.
The system includes a high-speed line-scan camera capturing over 6000 pixels across.
Due to the speed of the sheet and the required hole sizes, high-output, high-frequency fluorescent lighting was required.
The image to the right shows a list of holes,
where they were detected and their size.
Also shown is a live update of part of the line-scan camera'a image with the edge of the continuous sheet in grey,
the sheet itself in black and the hole in white.
Hole detector program reporting