Jian Huang, Jingqi Lu, Huan Yang, Xiangdong Cao. Quantitative Analysis on Coal Calorific Value Using Nanosecond, Femtosecond, and Dual-Pulse Laser-Induced Breakdown Spectroscopy[J]. Laser & Optoelectronics Progress, 2019, 56(19): 193002
- Laser & Optoelectronics Progress
- Vol. 56, Issue 19, 193002 (2019)
Fig. 1. Structural diagram of single pulse LIBS setup
Fig. 2. Structural diagram of double pulse LIBS setup
Fig. 3. Spectrograms of coal samples. (a) ns-LIBS; (b) fs-LIBS
Fig. 4. Scatter plot of normalized emission intensity of C
Fig. 5. Linear fitting of C content. (a) ns-LIBS; (b) ns-LIBS after correction; (c) fs-LIBS
Fig. 6. Femtosecond laser and dual-pulse laser induced spectrogram
Fig. 7. Predicted calorific value by PLS. (a) ns-LIBS; (b) fs-LIBS; (c) DP-LIBS
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Table 1. Carbon mass fraction and calorific value of standard coal samples
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Table 2. Emission line of input parameter for quantitative analysis based on PLS
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