Pistol Ring Gap Inspection under Free State Based on Machine Vision
Gui Tang Wang, Mei Yu · Applied Mechanics and Materials · 2013
The traditional way is to put the ring into the standard ring gauge to inspect, but the process of this kind of method is complex, high cost and slow. The study has put forward a detection method based on machine vision technology for pistol ring under free state as the existing defects in inspecting ring gap. Pistol ring is imaged under free conditions. Edge detection technologies, sub-pixel and Gaussian filter, have been effectively adopted to extract the contour of pistol ring. Then perform curve fitting in section to work out the gap length of each segment when pistol is circle. From the experiment, methods in this study are pertinent to the number of the segments. Proper segments can ensure gap length can be rightly calculated out when meeting the required accuracy. Sub-pixel edge detection is proposed in the application of piston ring detection in this study, and it improved the previous algorithm toimprove the efficiency ,reduced the process complexity, saved the cost.