基于近红外光谱检测不同产地石榴的糖度 下载: 1223次
Detection of Sugar Content of Pomegranates from Different Producing Areas Based on Near-Infrared Spectroscopy
华东交通大学机电与车辆工程学院水果智能光电检测技术与装备国家地方联合工程研究中心, 江西 南昌 330013
图 & 表
图 1. 近红外漫透射动态检测装置。(a)光路图; (b)光源分布图
Fig. 1. Dynamic detection device for near-infrared diffuse transmission. (a) Schematic of light path; (b) arrangement of light source
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图 2. 两种石榴的典型光谱
Fig. 2. Typical spectra of two types of pomegranates
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图 3. 表面粗糙及正常的样品的外观和光谱。(a)外观;(b)光谱
Fig. 3. Spectra and appearances of samples with rough and normal surfaces. (a) Appearances; (b) spectra
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图 4. 主成分得分散点图
Fig. 4. Score scattered plot of principal component analysis
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图 5. 偏最小二乘判别分析模型。(a)偏最小二乘判别建模集模型;(b)偏最小二乘判别预测集模型
Fig. 5. PLS-DA models. (a) PLS-DA model for calibration set; (b) PLS-DA model for prediction set
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图 6. 两个产地石榴糖度的偏最小二乘模型。(a)四川石榴;(b)云南石榴
Fig. 6. PLS-DA models of sugar content of pomegranates from two different producing areas. (a) Sichuan pomegranate; (b) Yunnan pomegranate
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表 1石榴的相关参数
Table1. Related parameters of pomegranate
Pomegranate species | Number (N) | RD /mm | LD /mm | Mass /g | RS /Brix | Mean RS | SD |
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Sichuan | 60 | 63-87 | 63-80 | 198-334 | 12.7-16.3 | 14.32 | 0.711 | Yunnan | 40 | 79-96 | 67-94 | 246.2-443.8 | 12.9-15.7 | 14.22 | 0.570 | Test | 8 | 74-82 | 68-79 | 228-306.5 | 12.2-16 | 13.76 | 0.638 |
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表 2PLS-DA模型的建模结果
Table2. Reconstructed results of PLS-DA model
Data set | N | Rp | RMSEP | Rc | RMSEC | Misjudgment rate /% |
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Calibration set | 75 | - | - | 0.85 | 1.04 | 1.6 | Prediction set | 25 | 0.82 | 1.16 | - | - | 3 |
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表 3不同处理方法对模型进行优化后的结果
Table3. Results of models optimized by different pretreatment methods
Pretreatmentmethod | Origin | Rp | RMSEC | Rc | RMSEP |
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Hybridmodeling | Sichuanand Yunnan | 0.49 | 0.66 | 0.46 | 0.61 | Originalspectra | Sichuan | 0.82 | 0.37 | 0.89 | 0.33 | | Yunnan | 0.80 | 0.34 | 0.85 | 0.29 | S-Gsmoothing +3* | Sichuan | 0.74 | 0.44 | 0.68 | 0.52 | | Yunnan | 0.80 | 0.34 | 0.80 | 0.33 | S-Gsmoothing+7* | Sichuan | 0.74 | 0.44 | 0.67 | 0.53 | | Yunnan | 0.77 | 0.35 | 0.71 | 0.39 | Normalization | Sichuan | 0.64 | 0.50 | 0.67 | 0.53 | | Yunnan | 0.69 | 0.41 | 0.78 | 0.34 | MSC | Sichuan | 0.63 | 0.50 | 0.63 | 0.56 | | Yunnan | 0.71 | 0.41 | 0.77 | 0.35 | Baseline | Sichuan | 0.82 | 0.37 | 0.90 | 0.31 | | Yunnan | 0.81 | 0.33 | 0.87 | 0.27 | Baseline+S-G | Sichuan | 0.74 | 0.44 | 0.67 | 0.53 | smoothing+3* | Yunnan | 0.78 | 0.34 | 0.82 | 0.31 |
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刘燕德, 张雨, 徐海, 姜小刚, 王军政. 基于近红外光谱检测不同产地石榴的糖度[J]. 激光与光电子学进展, 2020, 57(1): 013002. Yande Liu, Yu Zhang, Hai Xu, Xiaogang Jiang, Junzheng Wang. Detection of Sugar Content of Pomegranates from Different Producing Areas Based on Near-Infrared Spectroscopy[J]. Laser & Optoelectronics Progress, 2020, 57(1): 013002.