Consistency analysis of plastic samples based on similarity calculation from limited range of the Raman spectra

2016 Global Conference on Polymer and Composite Materials

材料科学;化学

Lai, B.W.^1 ; Wu, Z.X.^2 ; Dong, X.P.^1 ; Lu, D.^1 ; Tao, S.C.^1

Lightwave Technology Institute, Information Science and Engineering College, Xiamen University, Xiamen

361005, China^1

Technology Center, Xiamen Entry-Exit Inspection and Quarantine Bureau, Xiamen

361012, China^2

关键词: ABS plastic;    Consistency analysis;    Cut-out;    Plastic sample;    Similarity calculation;    Spectrum range;    Wave numbers;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/137/1/012061/pdf
DOI  :  10.1088/1757-899X/137/1/012061

学科分类：材料科学（综合）

来源: IOP

【 摘 要 】

We proposed a novel method to calculate the similarity between samples with only small differences at unknown and specific positions in their Raman spectra, using a moving interval window scanning across the whole Raman spectra. Two ABS plastic samples, one with and the other without flame retardant, were tested in the experiment. Unlike the traditional method in which the similarity is calculated based on the whole spectrum, we do the calculation by using a window to cut out a certain segment from Raman spectra, each at a time as the window moves across the entire spectrum range. By our method, a curve of similarity versus wave number is obtained. And the curve shows a large change where the partial spectra of the two samples is different. Thus, the new similarity calculation method identifies samples with tiny difference in their Raman spectra better.