Solid waste plastic material identification method based on double-layer classification algorithm

A classification algorithm and recognition method technology, applied in the direction of analysis of materials, character and pattern recognition, calculation, etc., can solve the problems of high classification environment and sample characteristics, low classification efficiency, insufficient detection accuracy, etc., to achieve no secondary pollution , accurate classification, and high detection accuracy

Active Publication Date: 2021-07-09
FUJIAN NORMAL UNIV
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Problems solved by technology

The electromagnetic sorting method, density sorting method and buoyancy sorting method not only have high requirements on the classification environment and sample characteristics, but also have low classification efficiency, and also have disadvantages such as insufficient detection accuracy.

Method used

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  • Solid waste plastic material identification method based on double-layer classification algorithm
  • Solid waste plastic material identification method based on double-layer classification algorithm
  • Solid waste plastic material identification method based on double-layer classification algorithm

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Experimental program
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Effect test

Embodiment

[0041]The data preprocessing stage includes the following steps:

[0042] S100. Collect a number of waste plastics by using an unbiased sampling method, and collect their infrared sample data. A Fourier transform infrared spectrometer of the American Thermo Fisher brand and model NICOLETIS10 was selected to collect the infrared spectra of the samples, and the infrared spectral data of 168 samples were obtained. Among them, the five samples of polyethylene (PE), polypropylene (PP), polystyrene (PS), polyvinyl chloride (PVC), and polyethylene terephthalate (PET) are 56, 43, 22, 20, 27.

[0043] S200. Perform data correction, smoothing and noise reduction on the sample data in step S100, wherein 3600-3300cm -1 The data in the wavelength interval is the water peak, and the absorbance data in this area is set to 0, that is, the influence of the water peak on the subsequent plastic classification is eliminated.

[0044] S300. For the five standard plastic samples of PE, PP, PS, P...

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Abstract

The invention discloses a solid waste plastic material identification method based on a double-layer classification algorithm, and the method comprises the steps: collecting infrared spectrum data in a sample through a Fourier infrared spectrometer, and carrying out the preprocessing operation of data correction, smooth noise reduction, water peak elimination and the like on the sample data; then, adopting a spectral angle mapping method and a standard sample to perform primary classification on a to-be-detected sample, selecting a wave crest detection algorithm or a support vector machine method according to a classification result to perform secondary classification on the sample, and finally, obtaining the final classification condition of the sample by combining the two classification results. The method has the advantages of no damage, rapidness, high detection precision, no secondary pollution, accurate classification and the like, and can be applied to recovery and utilization of waste plastics in specific life.

Description

technical field [0001] The invention relates to the technical field of analytical chemical detection and harmless treatment, in particular to a method for identifying solid waste plastic materials based on a double-layer classification algorithm. Background technique [0002] Plastic products are widely used in all walks of life because of their excellent properties such as portability, ease of use, and low cost, and have become indispensable materials in people's production and life. However, a large amount of plastic consumption will cause serious environmental pollution. At this stage, plastic pollution control has risen to a major social problem that needs to be solved urgently. To solve this major social problem, it is crucial to develop a reasonable plastic recycling method. Traditional plastic products are mostly recycled by incineration and landfill, but their use is being restricted because of secondary pollution and long-term hazards. How to realize harmless and e...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06K9/62G06Q10/00G01N21/3563
CPCG06Q10/30G01N21/3563G01N2021/3595G06F18/2411Y02W90/00Y02W30/62
Inventor 何柱朱珂郁林铭炜陈庆华
Owner FUJIAN NORMAL UNIV
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