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光源照射角度对苹果糖度近红外光谱检测的影响研究

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

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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Rc=0.91,校正集均方根误差xRMSEC=0.57,验证集相关系数Rp=0.84,验证集均方根误差xRMSEC=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 (Rc) is 0.91, root mean square error of the calibration set (xRMSEC) is 0.57, the correlation coefficient of the prediction set (Rp) is 0.84 and the root mean square error of the prediction set (xRMSEC) 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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中图分类号:S123;O657.33

DOI:10.3788/lop53.023004

所属栏目:光谱学

基金项目:国家863 计划(2012AA101906)、赣鄱英才555 工程领军人才培养计划(2011-64)、江西省光电检测工程技术研究中心资助(赣科发财字[2012]155 号)

收稿日期:2015-05-25

修改稿日期:2015-09-28

网络出版日期:2016-01-08

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龚志远:华东交通大学机电工程学院, 江西 南昌 330013
李轶凡:华东交通大学机电工程学院, 江西 南昌 330013
刘燕德:华东交通大学机电工程学院, 江西 南昌 330013
孙旭东:华东交通大学机电工程学院, 江西 南昌 330013

联系人作者:龚志远(gongzhiyuan0514@163.com)

备注:龚志远(1966—),男,副教授,主要从事光机电一体化方面的研究。

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引用该论文

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

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

被引情况

【1】周竹,尹建新,周素茵,方益明. 基于近红外光谱与连续投影算法的针叶材表面节子缺陷识别. 激光与光电子学进展, 2017, 54(2): 23001--1

【2】张航,刘国海,江辉,梅从立,黄永红. 基于近红外光谱技术的乙醇固态发酵过程参数定量检测. 激光与光电子学进展, 2017, 54(2): 23002--1

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