Optics and Precision Engineering, Volume. 33, Issue 7, 1130(2025)
Visual inspection for assembly conformity of wing cable brackets
Figures & Tables(16)
Fig. 1. Flowchart of visual inspection method for wing cable bracket assembly compliance
Fig. 6. Comparison of imaging effects of polarization imaging system
Fig. 8. Example of instance segmentation and results of comparison experiment
Fig. 9. Comparison of results of overlapping with or without image alignment
Table 1. Comparison of SAM pre-trained weights and inference time （GPU： NVIDIA RTX3060 Laptop）
View tableView in ArticleTable 1. Comparison of SAM pre-trained weights and inference time （GPU： NVIDIA RTX3060 Laptop）
Model Embedding dimension Transformer attention head Transformer block Parameter Average time cost/s VIT-B 768 12 12 63M 2.16 VIT-L 1 024 16 24 308M 5.76 VIT-H 1 280 16 32 636M 13.21
Table 2. Parameters of data augmenration in YOLOv8 training stage
View tableView in ArticleTable 2. Parameters of data augmenration in YOLOv8 training stage
Name Value rmin 0.7 rmax 1.3 max_size 5 θmax 3° tmax 3 pixel
Table 3. Training parameters and inference results in object detection stage
View tableView in ArticleTable 3. Training parameters and inference results in object detection stage
Method Parameter（need to be trained） Precision Recall mAP@0.5 mAP@0.5∶0.95 Ours 11.2M 0.913 0.984 0.992 0.859 Mask R-CNN 63.3M 0.901 0.978 0.978 0.854
Table 4. Average mask intersection over union
View tableView in ArticleTable 4. Average mask intersection over union
Bracket assembly status Average mask IoU Correct 0.950 7 Incorrect 0.422 1
Table 5. Experimental results of assembly inspection algorithm
View tableView in ArticleTable 5. Experimental results of assembly inspection algorithm
Predict assembly status Ground truth Correct Incorrect Correct 83 （TP） 0 （FP） Incorrect 4 （TN） 15 （FN）
Table 6. Average mask IoU with and without viewpoint deviation
View tableView in ArticleTable 6. Average mask IoU with and without viewpoint deviation
Viewpoint Assembly status Average IoU With deviation Correct 0.929 9 Incorrect 0.371 3 No deviation Correct 0.983 1 Incorrect 0.464 6
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Xin WANG, Pengcheng LI, Haihua CUI, Xinxin GE. Visual inspection for assembly conformity of wing cable brackets[J]. Optics and Precision Engineering, 2025, 33(7): 1130
Paper Information
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Received: Sep. 2, 2024
Accepted: --
Published Online: Jun. 23, 2025
The Author Email: Haihua CUI (cuihh@nuaa.edu.cn)
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