Edge offset measurement on wound coils
The side face of a horizontal-axis steel coil on a coil car is scanned by a laser profiler. Axial positions of winding layers are derived by radius; telescopic winding and a protruding layer feed the coiler-adjustment decision.
Maximum offset and the radius of the protruding layer enter the coil record; an NG coil prompts coiler adjustment and rewinding review.
- 01 Car
- 02 Laser
- 03 Section
- 04 Offset
- 05 Adjust
The coil car enters the measurement position.
- Maximum edge offset
- —
- Protruding-layer radius
- —
- Out-of-limit layers
- —
Scenes are illustrative simulations; they are not customer references or performance guarantees.
Need
Numerous thin layer edges on the coil side face produce different reflections. Coil and car tilt can make axial offset relative to a fixed plane appear larger than it is.
Solution approach
The side profiler laser line crosses layer edges along the radius. A side-face reference is derived from the coil axis and inner layers. Axial difference at each layer is mapped to radius; layers exceeding limit lines are marked on the offset curve.
Process steps
- 01
Car
The coil car enters the measurement position.
- 02
Laser
The line crosses the side face along the radius.
- 03
Section
Layer edges are extracted with their axial positions.
- 04
Offset
The radius-offset curve is compared with limits.
- 05
Adjust
The protruding layer prompts a coiler-adjustment request.
Related applications
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