Xue-gang LÜ, Xiu-hua LI, Shi-min ZHANG, Mu-qing ZHANG, Hong-tao JIANG. A Method for Detecting Sucrose in Living Sugarcane With Visible-NIR Transmittance Spectroscopy[J]. Spectroscopy and Spectral Analysis, 2021, 41(12): 3747
- Spectroscopy and Spectral Analysis
- Vol. 41, Issue 12, 3747 (2021)
Fig. 1. Transmission spectrum acquisition platform of sugarcanes
1: Probe; 2: Black sponge pad; 3: Halogen lamp;4: Sample fixing cylinder; 5: Sugarcane sample;6: Optical fiber; 7: Spectrometer; 8: Cable; 9. Laptop
1: Probe; 2: Black sponge pad; 3: Halogen lamp;4: Sample fixing cylinder; 5: Sugarcane sample;6: Optical fiber; 7: Spectrometer; 8: Cable; 9. Laptop
Fig. 2. The sugarcane samples before and after wax removal and the sketch of transmittance measurement positions
Fig. 3. Spectral difference of sugarcane before and after wax removal
CWR: Cane wax removed; OS: Original sample
(a): Transmission spectra at different sampling positions of a sugarcane sample; (b): Correlation between transmittance spectra and sucrose
CWR: Cane wax removed; OS: Original sample
(a): Transmission spectra at different sampling positions of a sugarcane sample; (b): Correlation between transmittance spectra and sucrose
Fig. 4. Average spectral transmittance of samples at different angles
(a): Original sample; (b): Cane wax removed
(a): Original sample; (b): Cane wax removed
Fig. 5. Frequency of each wavelength selected by VCR-ACO algorithm
Fig. 6. Scatter plot of the model established by the wavelength selected by VRC-ACO algorithm
(a): Calibration set; (b): Prediction set
(a): Calibration set; (b): Prediction set
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Table 1. Statistical characteristics of sucrose content in sugarcane samples
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Table 2. Spectral pretreatment results of sugarcane samples at 120°measurement angle
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Table 3. PLS modeling results obtained by different spectral measurement methods
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Table 4. Results of selected wavelengths
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Table 5. Modeling results of selected wavelengths by different algorithms
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