Complete surface inspection with 3D smart sensors
14 Sep 2021 | Reading time: 5 min
Wood panel scanning using a mixed model sensor system
Surface inspection can be a highly complex task especially with product shapes such as wood flooring panels where you need to inspect both large areas of the panel surface finish at the same time as detailed high-resolution profile of the tongue and groove sides.
This article explains how to master this challenge in a single work step. By combining different LMI 3D laser line profilers into a single system allows you to scan large areas and at the same time capture the smallest details in high resolution.
The eternal dilemma: field of view or resolution?
3D inspection systems combining multiple laser line profilers are typically limited to using sensors of the same model type.
This solution makes perfect sense, when you need to extend the field of view while maintaining the same measurement resolution, however, what happens if the application requires simultaneous inspection of fine details and large areas?
These “dual requirement” applications cannot be solved using just one sensor model alone without making a compromise on either resolution or field of view. Sensor models that have wide fields of view typically have lower resolution, and sensor models with high resolution typically have much smaller fields of view.
What you really need to solve the application is the ability to network two different sensor models into one system using a combined co-ordinate system.
Combining different 3D laser sensors
for complete single pass inspection
Mixed model networking capability allows you to perform a high-resolution inspection only on areas where it is needed (that is, where there are fine features), while simultaneously getting wide overall coverage from other sensors in the network in order to capture the entire object surface.
Inspecting wood panels using a mixed model LMI Gocator sensor system
The inspection of wooden floor panels requires various types of information: The panels have to be scanned and measured for complete dimensions, while the panel’s tongue and groove edges must be inspected for fine features and tight dimensional tolerances.
The LMI Gocator 2440 has the wider field of view and is therefore able to achieve greater scan coverage with fewer sensors. This model easily captures the complete dimensions of the panel’s top and bottom surfaces in motion, including the weight-distributing grooves that run lengthwise along the bottom face.