At present, the domestic production of the winding workpiece automatically has been achieved, but the workpiece inspection is mainly relied on human eyes. As the workers is easy to be fatigue, which often causing error checking. In order to improve the efficiency of product inspection and found the problem timely to avoid producing a large number of defective workpieces, the demand of automatic detection winding workpiece is need to be solved eagerly. Take the dc motor rotor for example, according to the characteristics of the rotor, the methodof template matching is been used to locate the workpiece, and the method of Hu moments similarity is used to judge workpiece is qualified or not. The experimental results shows that these method is efficient and effective.
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