Automatic diagnosis and early warning method and system for heating defect of cable oil-filled terminal

The invention discloses an automatic diagnosis and early warning method and system for heating defects of a cable oil-filled terminal. Acquiring an infrared image and a visible light image of the cable oil charging terminal, and performing registration to obtain the infrared image and the visible light image which are the same in size and matched in pixel; the PIA Fusion network model is optimized by using a VGG-11 feature network; fusing the infrared image and the visible light image by using a PIA Fusion network model to form a fusion data set, marking an easy-to-heat area of the cable terminal, and dividing the easy-to-heat area into a training set, a verification set and a test set; optimizing a backbone network and a loss function of the YOLOv5 network model, setting training parameters of the YOLOv5 network model, inputting a training set into the network model, verifying a training result by using a verification set, and updating the training parameters; and inputting the fused image into a YOLOv5 netw