Weiye Lu, Meirong Dong, Kaijie Bai, Zihan Shang, Zhichun Li, Xiaoxuan Chen, Junbin Cai, Jidong Lu. Evaluation of T91 Steel Aging Grade Based on Portable Laser-Induced Breakdown Spectroscopy Device[J]. Laser & Optoelectronics Progress, 2024, 61(5): 0530003
- Laser & Optoelectronics Progress
- Vol. 61, Issue 5, 0530003 (2024)
Fig. 1. Artificial samples of T91 steel
Fig. 2. Portable LIBS device
Fig. 3. Original spectrum collected by portable LIBS device
Fig. 4. Contribution rates of spectral feature information. (a) PCA dimension reduction; (b) LDA dimension reduction
Fig. 5. Training set spectral data distributions after dimension reduction. (a) PCA; (b) LDA
Fig. 6. Variation of LDA-KNN model classification accuracy with K value
Fig. 7. LDA-KNN model prediction results on test set
Fig. 8. LDA-SVM model prediction results on test set
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Table 1. Aging grades of T91 samples
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Table 2. Test set classification accuracy of each model
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