光源照射角度对苹果糖度近红外光谱检测的影响研究

龚志远; 李轶凡; 刘燕德; 孙旭东

doi:doi:10.3788/lop53.023004

激光与光电子学进展, 2016, 53 (2): 023004, 网络出版: 2016-01-22

光源照射角度对苹果糖度近红外光谱检测的影响研究下载： 850次

Study on Influence of Irradiation Angle on Detection of Sugar Content of Apple by Near Infrared Spectroscopy

论文大纲

龚志远 ^*李轶凡刘燕德孙旭东

作者单位

华东交通大学机电工程学院, 江西南昌 330013

光谱学糖度近红外光谱苹果光照角度 spectroscopy sugar content near infrared spectroscopy apple irradiation angle

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摘要

讨论光源照射角度对近红外光谱检测苹果糖度模型的影响，得出最佳的光源照射方式。以苹果为研究对象，糖度为检测指标，2 盏100 W 卤素灯作为光源，从3 种不同光源照射角度(30°、45°、60°)照射放置于中间的苹果样品，得到漫透射光谱数据并建立偏最小二乘回归(PLS)模型。当光照角度为45°时，模型的精度最高，其校正集相关系数R_c=0.91，校正集均方根误差x_RMSEC=0.57，验证集相关系数R_p=0.84，验证集均方根误差x_RMSEC=0.73。不同的光照角度对模型精度有一定的影响，为建立实际模型时选择最佳的光照角度提供了可靠的依据。

Abstract

The effect of irradiation angle on detecting apple sugar by near infrared spectroscopy is discussed, and the best irradiative way of light source is obtained. An apple is selected as the object and sugar content of the apple is measured. The apple sample is irradiated in the middle of two lights of 100 W with three irradiation angles (30°, 45°, 60°). The spectra are collected using diffuse transmittance and the partial least squares regression model (PSL) is established. When the light angle is 45°, the precision of the model is the highest. The correlation coefficient of the calibration set (R_c) is 0.91, root mean square error of the calibration set (x_RMSEC) is 0.57, the correlation coefficient of the prediction set (R_p) is 0.84 and the root mean square error of the prediction set (x_RMSEC) is 0.73. The results show that the irradiation angle has certain effect on the model accuracy, and the study provides a basis for selecting the best irradiation angle in the building of actual models.

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龚志远, 李轶凡, 刘燕德, 孙旭东. 光源照射角度对苹果糖度近红外光谱检测的影响研究[J]. 激光与光电子学进展, 2016, 53(2): 023004. Gong Zhiyuan, Li Yifan, Liu Yande, Sun Xudong. Study on Influence of Irradiation Angle on Detection of Sugar Content of Apple by Near Infrared Spectroscopy[J]. Laser & Optoelectronics Progress, 2016, 53(2): 023004.

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