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Laser & Optoelectronics Progress, Volume. 61, Issue 5, 0530003(2024)

Evaluation of T91 Steel Aging Grade Based on Portable Laser-Induced Breakdown Spectroscopy Device

Weiye Lu1,2, Meirong Dong2、*, Kaijie Bai1, Zihan Shang2, Zhichun Li2, Xiaoxuan Chen1, Junbin Cai2, and Jidong Lu2
Author Affiliations
  • 1Guangdong Institute of Special Equipment Inspection and Research Shunde Branch, Foshan 528300, Guangdong , China
  • 2School of Electric Power Engineering, South China University of Technology, Guangzhou 510640, Guangdong , China
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    AbstractGet PDF(in Chinese)
    Figures&Tables (10)
    Equations (1)
    References (15)
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    Figures & Tables(10)
    Artificial samples of T91 steel

    Fig. 1. Artificial samples of T91 steel

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    Portable LIBS device

    Fig. 2. Portable LIBS device

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    Original spectrum collected by portable LIBS device

    Fig. 3. Original spectrum collected by portable LIBS device

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    Contribution rates of spectral feature information. (a) PCA dimension reduction; (b) LDA dimension reduction

    Fig. 4. Contribution rates of spectral feature information. (a) PCA dimension reduction; (b) LDA dimension reduction

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    Training set spectral data distributions after dimension reduction. (a) PCA; (b) LDA

    Fig. 5. Training set spectral data distributions after dimension reduction. (a) PCA; (b) LDA

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    Variation of LDA-KNN model classification accuracy with K value

    Fig. 6. Variation of LDA-KNN model classification accuracy with K value

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    LDA-KNN model prediction results on test set

    Fig. 7. LDA-KNN model prediction results on test set

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    LDA-SVM 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 1. Aging grades of T91 samples

      SampleAging gradeSampleAging grade
      A11A64
      A22A73
      A32A83
      A43A95
      A52A103

    • Table 2. Test set classification accuracy of each model

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      Table 2. Test set classification accuracy of each model

      Dimension reduction methodAccuracy /%
      KNNSVM
      PCA93.3366.25
      LDA94.1794.58
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    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

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    Paper Information

    Category: Spectroscopy

    Received: Jan. 17, 2023

    Accepted: Mar. 1, 2023

    Published Online: Feb. 29, 2024

    The Author Email: Meirong Dong (epdongmr@scut.edu.cn)

    DOI:10.3788/LOP230526

    CSTR:32186.14.LOP230526

    Topics

    laser devices and laser physics
    Lasers and Laser Optics
    Laser physics
    laser manufacturing
    Instrumentation, Measurement and Metrology