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http://dx.doi.org/10.7844/kirr.2017.26.6.73

Development of Automatic Sorting System for Black Plastics Using Laser Induced Breakdown Spectroscopy (LIBS)  

Park, Eun Kyu (Center for IT and Environmental Research, The University of Suwon)
Jung, Bam Bit (Center for IT and Environmental Research, The University of Suwon)
Choi, Woo Zin (Center for IT and Environmental Research, The University of Suwon)
Oh, Sung Kwun (Department of Electrical Engineering, The University of Suwon)
Publication Information
Resources Recycling / v.26, no.6, 2017 , pp. 73-83 More about this Journal
Abstract
Used small household appliances have a wide variety of product types and component materials, and contain high percentage of black plastics. However, they are not being recycled efficiently as conventional sensors such as near-infrared ray (NIR), etc. are not able to detect black plastic by types. In the present study, an automatic sorting system was developed based on laser-induced breakdown spectroscopy (LIBS) to promote the recycling of waste plastics. The system we developed mainly consists of sample feeder, automatic position recognition system, LIBS device, separator and control unit. By applying laser pulse on the target sample, characteristic spectral data can be obtained and analyzed by using CCD detectors. The obtained data was then treated by using a classifier, which was developed based on artificial intelligent algorithm. The separation tests on waste plastics also were carried out by using a lab-scale automatic sorting system and the test results will be discussed. The classification rate of the radial basis neural network (RBFNNs) classifier developed in this study was about > 97%. The recognition rate of the black plastic by types with the automatic sorting system was more than 94.0% and the sorting efficiency was more than 80.0%. Automatic sorting system based on LIBS technology is in its infant stage and it has a high potential for utilization in and outside Korea due to its excellent economic efficiency.
Keywords
Used small household appliances; LIBS; Black plastic; Identification; Automatic sorting; Recycling;
Citations & Related Records
Times Cited By KSCI : 6  (Citation Analysis)
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