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An automatic sorting system for electronic components detached from waste printed circuit boards.

Yingqi Lu¹, Bo Yang¹, Yichun Gao¹

¹School of Environmental Science and Engineering, Shanghai Jiao Tong University, 800 Dongchuan Road, Shanghai 200240, People's Republic of China.

Waste Management (New York, N.Y.)

|October 26, 2021

Summary

Recycling electronic components (ECs) from waste printed circuit boards (PCBs) is crucial for resource recovery and pollution reduction. This study introduces an automated system using YOLO-V3 for accurate EC classification, improving hazardous e-waste recycling efficiency.

Keywords:

Automation Object detection Recycling Waste electrical and electronic equipment

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Area of Science:

Materials Science
Environmental Science
Computer Science

Background:

Electronic waste (e-waste) recycling is vital for environmental protection and resource recovery.
Printed circuit boards (PCBs) are significant e-waste components containing valuable and hazardous materials.
Manual sorting of electronic components (ECs) from PCBs is inefficient and poses health risks due to hazardous environments.

Purpose of the Study:

To develop an automated system for classifying and sorting electronic components (ECs) from waste printed circuit boards (WPCBs).
To improve the efficiency and safety of e-waste recycling processes.
To achieve accurate material recovery from WPCBs.

Main Methods:

Utilized the YOLO-V3 object detection algorithm trained on a custom dataset for EC classification.
Developed an improved desoldering process using a nitrogen atmosphere to protect EC surfaces during detachment.
Proposed a smart on-line sorting system for automated separation of detached ECs.

Main Results:

The YOLO-V3 model demonstrated satisfactory classification accuracy for various EC categories.
The nitrogen atmosphere during desoldering effectively protected EC surfaces, preserving detection accuracy.
The proposed system enables automatic separation of ECs from WPCBs.

Conclusions:

Automated classification and sorting of ECs using YOLO-V3 are feasible and effective for WPCB recycling.
The developed system enhances recycling efficiency and worker safety by minimizing manual handling.
This approach contributes to sustainable e-waste management and critical material recovery.