The O-ring is a rubber ring with a round interface shape, which is the most widely used seal in hydraulic and pneumatics. The O-shaped sealing ring is a two-way sealing element. During installation, the initial compression of the O-shaped sealing ring in radial or axial direction determines the initial sealing capacity of the O-shaped sealing ring. The force generated by the system pressure on the O-shaped sealing ring is its total sealing force; the sealing force increases with the increase of the system pressure. Under pressure, the shape of the O-ring is similar to that of a liquid with high surface tension. The pressure is transmitted equally in all directions. 

 In the detection industry, compared with human vision, machine vision has obvious advantages and has immeasurable value in detecting defects and preventing defective products from being distributed to consumers. With the development of industry, traditional manual detection can no longer meet the production efficiency of enterprises. Machine vision detection is to use machines instead of human eyes for measurement and judgment. It is a contact-free and damage-free automatic detection technology. It is an effective means to realize equipment automation, intelligence and precision control. It is safe, reliable and spectral. It has a wide response range and can work for a long time in harsh environments. 

 Detection effect 

 Convex bag 

 Backlight detection 

 Inner fur edge 

 Outer ruff edge 

 Top positive light detection 

 Damaged