PVC Profile Dimension Measurement System (In-Line Vision Inspection)
In-line vision measurement system for dimensional inspection of PVC and PVC-U window/door profiles during extrusion. An industrial camera with telecentric lens and LED backlighting captures the profile silhouette as it passes along the line; a machine-vision PC compares the contour against the reference CAD cross-section to gauge width, height, wall thickness, channel width, and diagonal distance in real time, feeding OK/NOK results back to the extrusion line PLC — replacing manual caliper spot-checks with continuous, camera-based profile geometry inspection.
- Industrial camera, telecentric lens & LED backlighting
- Encoder/trigger for line-synchronised capture
- Machine-vision industrial PC for image processing
- Real-time width, height, wall thickness, channel width & diagonal measurement
- CAD/reference contour comparison with automatic tolerance check
- HMI operator screen with live image & statistics
- PLC feedback: OK/NOK alarm & line parameter adjustment
- Continuous production quality logging (data & image archive)
Standards
- In-Line QC — Continuous camera-based dimensional inspection
- CAD Comparison — Contour matching against reference cross-section
Frequently Asked Questions
How does PVC profile dimension control work with a vision measurement system?
An industrial camera with telecentric lens and LED backlighting captures the profile's silhouette as it moves along the extrusion line. Machine-vision software extracts the contour and compares it to the reference CAD cross-section, calculating width, height, wall thickness, channel width, and diagonal distance in real time.
Does the system measure without stopping the extrusion line?
Yes. Measurement is continuous and in-line — synchronised to line speed by an encoder/trigger — so every profile is checked as it is produced, with no manual sampling or line stoppage.
How is this different from manual caliper spot-checks?
A caliper only checks a few sample points per shift. The vision system inspects every measurement point on every profile passing the camera, giving continuous online coverage with an instant OK/NOK verdict fed back to the line PLC instead of a periodic manual sample.
What dimensions can the system measure on a PVC or PVC-U profile?
Typical measurement points include overall width and height, wall thickness, internal channel width, and diagonal distances between reference features — configured per profile using the reference CAD cross-section.