基于波段数量约束的高速近红外高光谱塑料分选系统  

High-Speed Near-Infrared Hyperspectral Plastic Sorting System Basedon Band Number Constraints

作　　者：吴泳微 袁琨 王坚 张洋 王洋 WU Yongwei;YUAN Kun;WANG Jian;ZHANG Yang;WANG Yang(College of Optical and Electronic Technolgy,China Jiliang University,Hangzhou,Zhejiang 310018,China;Caipu Technology(Zhejiang)Co.,Ltd.,Taizhou,Zhejiang 318000,China)

机构地区：[1]中国计量大学,光学与电子科技学院,浙江杭州310018 [2]彩谱科技(浙江)有限公司,浙江台州318000

出　　处：《塑料》2024年第5期136-141,共6页Plastics

基　　金：浙江省重点研发计划(2020C03095);浙江省高校基础研究运行专项资金(2020YW22)。

摘　　要：提出了一种基于波段数量约束的连续投影算法(SPAsa),提高模型的计算速度。采集废旧塑料样品和相应的高光谱数据,通过余弦相似度算法自适应标记的方法对目标塑料逐一标记,构建废旧塑料样品库,利用PLS-DA方法进行分类。并且,设置了一个可以约束特征波长数量范围的SPAsa算法提取的特征变量的数量,在限定范围内,从256个波长的塑料近红外全谱数据中择优提取出了8个特征波长。建立了全光谱PLS-DA模型、SPA-PLS-DA模型和SPAsa-PLS-DA模型,3种分类模型对12种塑料的分类准确率均大于97%。最后,将3种模型应用于分选系统,测试分类效果和分类速度,对目标ABS塑料和其他塑料进行分离,SPAsa-PLS-DA模型的分离准确率可达100%,其搭载分选系统处理一帧数据所需运行时间小于2ms。A continuous projection algorithm based on the number of band constraints(SPAsa)was proposed to improve the computational speed of the model.Firstly,waste plastic samples and corresponding hyperspectral data were collected,and the target plastics were labelled one by one by the cosine similarity algorithm adaptive labelling method to construct a waste plastic sample library,which was classified using the PLS-DA method.Secondly,the number of feature variables extracted by the SPASA algorithm,which could constrain the range of the number of feature wavelengths,was set,and eight feature wavelengths were optimally extracted from the plastic near-infrared full-spectrum data of 256 wavelengths within the limited range.The full-spectrum PLS-DA model,the SPA-PLS-DA model and the SPAsa-PLS-DA model were established,and the classification accuracies of the three classification models for the 12 plastics were all greater than 97%.Finally,the SPAsa-PLS-DA model was applied to the sorting system to test the classification effect and speed,and the SPAsa-PLS-DA model was able to separate the target ABS plastics from other plastics with an accuracy of up to 100%,and the running time of the sorting system to process one frame of data was less than 2 ms.

关 键 词：近红外光谱 高速 塑料分选 连续投影算法 偏最小二乘判别分析 

分 类 号：TQ325[化学工程—合成树脂塑料工业]