Non-contact approach to roundness measurement

In this paper, a non-contact approach to roundness measurement using machine vision is proposed. A test-rig and computer algorithm are developed to realised the approach. The computer algorithm employs minimum zone circle MZC technique to measure the roundness deviation. High contrast and good quality image segmentation is produced with the developed image processing algorithm technique. Camshaft profile is used to determine the effectiveness of the developed approach. Experimental results reveal that the developed computer algorithm coupled with minimum radial zone circle technique can be used as inspection tool for integrated in-process inspection of form tolerances.