The charger usually has a lot of information on its surface, such as charging voltage, output voltage, current, production place, batch number, manufacturer and so on. These information is usually silk screen. However, silk screen will often appear printing defect, such as offset, shading, ink, missing words, lack of zoned, dust, bubbles, and so on.

The use of machine vision automatic measurement of the relevant dimensions of metals, will need to be manually checked by the traditional test process automation, eliminate artificial inspection errors, more effectively improve the quality of products. Equipped with automatic feeding and blanking system, the production efficiency is greatly improved.