“…With the rapid development of artificial intelligence technology, scholars begin to apply deep learning in the field of part target recognition. Recognition algorithms based on machine vision technology and convolutional neural network emerge endlessly, including R-CNN, VGG, YOLO, Fast R-CNN, Faster R-CNN [1,2,3,4,5] , etc. Because of its high precision, high speed, no contact as well as no loss, it has gradually replaced the traditional feature-matching classification method.…”