分析与检测

白酒糟醅中酸度值的高光谱检测方法

  • 鞠杰 ,
  • 田建平 ,
  • 胡新军 ,
  • 黄丹 ,
  • 黄浩平 ,
  • 彭兴辉 ,
  • 罗惠波
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  • 1(四川轻化工大学 机械工程学院,四川 宜宾,644000)
    2(四川轻化工大学 生物工程学院,四川 宜宾,644000)
    3(酿酒生物技术及应用四川省重点实验室,四川 宜宾,644000)
硕士研究生(田建平教授为通信作者,E-mail:409507648@qq.com)

收稿日期: 2021-05-18

  修回日期: 2021-09-23

  网络出版日期: 2022-03-16

基金资助

四川省科技厅重点研发项目(2019YJ0475);中国轻工业浓香型白酒固体发酵重点实验室项目(2019JJ016)

Hyperspectral detection method for the acidity detection of Baijiu fermented grains

  • JU Jie ,
  • TIAN Jianping ,
  • HU Xinjun ,
  • HUANG Dan ,
  • HUANG Haoping ,
  • PENG Xinghui ,
  • LUO Huibo
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  • 1(College of Mechanical Engineering, Sichuan University of Science & Engineering, Yibin 644000, China)
    2(College of Biotechnology Engineering, Sichuan University of Science & Engineering, Yibin 644000, China)
    3(Liquor Making Biotechnology and Application Key Laboratory of Sichuan Province, Yibin 644000, China)

Received date: 2021-05-18

  Revised date: 2021-09-23

  Online published: 2022-03-16

摘要

酸度值是评价白酒糟醅质量的重要指标之一,为进一步提高糟醅酸度值的检测精度,提出了一种应用高光谱成像技术检测糟醅酸度值的方法。采用高光谱成像系统,在900~1 700 nm内采集糟醅样本的光谱信息,并提取全部样本的平均光谱数据。采用3种预处理方法对原始光谱进行预处理,得到多元散射校正(multiplicative scatter correction,MSC)为最佳预处理方法。在保证检测精度的基础上,为提高检测效率,采用竞争自适应加权抽样(competitive adaptive reweighted sampling,CARS)算法选择特征波段作为优化方法,建立偏最小二乘回归(partial least squares regression,PLSR)和最小二乘支持向量机(least squares-support vector machine,LS-SVM)预测模型。结果表明,CARS算法选取38个特征波长所建立的LS-SVM预测模型显示出良好的预测效果,其中预测集相关系数R2p为0.961 8,预测集均方根误差为0.058 0 g/kg。研究结果表明,高光谱成像技术相对于其他检测技术在糟醅酸度检测中有更好的检测精度,同时针对白酒工艺过程的其他成分含量检测探索出有效的检测途径。

本文引用格式

鞠杰 , 田建平 , 胡新军 , 黄丹 , 黄浩平 , 彭兴辉 , 罗惠波 . 白酒糟醅中酸度值的高光谱检测方法[J]. 食品与发酵工业, 2022 , 48(4) : 255 -260 . DOI: 10.13995/j.cnki.11-1802/ts.027968

Abstract

Acidity value is one of the important indexes to evaluate the quality of fermented grains. In order to further improve the detection accuracy of the acidity value of fermented grains, a hyperspectral imaging method has been proposed to detect the acidity value of fermented grains. A hyperspectral imaging system was used to collect the spectral information of fermented grains samples in the range of 900-1 700 nm and the average spectral data of all samples was extracted. Multiple scattering correction (MSC) was identified as the best pretreatment method of three tested pretreatment methods. On the basis of ensuring the detection accuracy and improving the detection efficiency, the competitive adaptive reweighted sampling (CARS) algorithm adopted to select feature bands was developed as the optimization method, and the PLSR and LS-SVM prediction models were established. The results showed that the LS-SVM prediction model, based on 38 characteristic wavelengths selected by CARS algorithm presented good prediction effect. The correlation coefficient of the prediction set R2p was 0.961 8, and the root mean square error of the prediction set was 0.058 0 g/kg. The results indicated that hyperspectral imaging had better accuracy than other techniques in detecting the acidity of fermented grains. At the same time, an effective way to detect the content of other ingredients in liquor process was explored.

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