Combination of Dual-Energy X-ray Transmission and Variable Gas-Ejection for the In-Line Automatic Sorting of Many Types of Scrap in One Measurement
| Autor: | Xiang Xu, Wenhua Ye, Tianzhong Xiong |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2021 |
| Předmět: |
material identification
Technology Materials science QH301-705.5 QC1-999 Scrap 010501 environmental sciences 01 natural sciences 030218 nuclear medicine & medical imaging 03 medical and health sciences 0302 clinical medicine Optics dual-energy X-ray transmission General Materials Science Biology (General) Instrumentation QD1-999 0105 earth and related environmental sciences Fluid Flow and Transfer Processes Dual energy business.industry Process Chemistry and Technology Physics General Engineering Sorting X-ray waste sorting Engineering (General). Civil engineering (General) variable gas-ejection Computer Science Applications center-of-gravity coordinates calculation Variable (computer science) Chemistry Transmission (telecommunications) mass calculation shading of low-energy Line (text file) TA1-2040 business |
| Zdroj: | Applied Sciences, Vol 11, Iss 4349, p 4349 (2021) Applied Sciences Volume 11 Issue 10 |
| ISSN: | 2076-3417 |
| Popis: | As an important part of pretreatment before recycling, sorting has a great impact on the quality, efficiency, cost and difficulty of recycling. In this paper, dual-energy X-ray transmission (DE-XRT) combined with variable gas-ejection is used to improve the quality and efficiency of in-line automatic sorting of waste non-ferrous metals. A method was proposed to judge the sorting ability, identify the types, and calculate the mass and center-of-gravity coordinates according to the shading of low-energy, the line scan direction coordinate and transparency natural logarithm ratio of low energy to high energy (R_value). The material identification was satisfied by the nearest neighbor algorithm of effective points in the material range to the R_value calibration surface. The flow-process of identification was also presented. Based on the thickness of the calibration surface, the material mass and center-of-gravity coordinates were calculated. The feasibility of controlling material falling points by variable gas-ejection was analyzed. The experimental verification of self-made materials showed that identification accuracy by count basis was 85%, mass and center-of-gravity coordinates calculation errors were both below 5%. The method proposed features high accuracy, high efficiency, and low operation cost and is of great application value even to other solid waste sorting, such as plastics, glass and ceramics. |
| Databáze: | OpenAIRE |
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