Cheng XU, Fang LI, Feng CHEN, Deng ZHANG, Fan DENG, Lianbo GUO. Rapid Classification of Laser Induced Breakdown Spectroscopy of Titanium Alloys[J]. Acta Photonica Sinica, 2022, 51(4): 0430001
- Acta Photonica Sinica
- Vol. 51, Issue 4, 0430001 (2022)
Fig. 1. Diagram of experimental setup
Fig. 2. Picture of TC4 titanium alloy
Fig. 3. The change of peak intensity and signal to noise ratio with unit pulse energy
Fig. 4. The change of peak intensity and signal to noise ratio with trigger delay
Fig. 5. TC4-1 full spectrum
Fig. 6. Confusion matrix of training set of original spectrums after weighted KNN classification and confusion matrix of test set classification result
Fig. 7. Confusion matrix of weighted KNN classification for spectral training set after data processing and confusion matrix of test set classification result
Fig. 8. Optimization results of three parameters
Fig. 9. Training set confusion matrix of final classification result and confusion matrix of test set classification result
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Table 1. Titanium alloy number and element content
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Table 2. Spectral wavelength，transition probability and energy level
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Table 3. Characteristic lines for spectral screening
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Table 4. Comparison of results between different algorithms
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Table 5. Comparison of optimization results
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