RFID Waste Bag Sorting via Intermediary Identification
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Solution Overview
Problem
Current waste sorting methods face challenges such as user non-compliance with color-coded waste bags, uncertainty in optical sorting in dirty environments, and issues with plastic bags opening during transport, leading to mixed waste and hygiene problems, as well as inefficiencies in sorting and recycling processes.
Innovation Solution
Implementing RFID identifiers in waste bags to ensure accurate sorting at a central facility, allowing any bag type to be used and preventing unauthorized access, while ensuring bags remain closed during transport, and enabling efficient sorting and recycling by linking each bag to a specific waste type and user for accurate allocation of fees and incentives.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If color-coded waste bags are used for sorting, then waste sorting can be performed, but users may not use the correct color bags leading to misclassification
Solution Approach 1:
An RFID identifier is introduced as an intermediary element attached to the waste bag. This RFID tag serves as a reliable mediator that carries the actual waste type information, replacing the unreliable color-coding system. The RFID identifier ensures accurate identification of waste type regardless of user error in selecting bag colors.
2Extent of automation
If optical sorting apparatus is used to sort waste bags, then automatic sorting can be performed, but the sorting operation becomes uncertain in dirty environments
Solution Approach 1:
The optical sorting system is replaced with an RFID-based identification system. Instead of using optical sensors that read visual characteristics (colors) of bags in potentially dirty environments, the system uses RFID readers that wirelessly communicate with RFID tags attached to bags. This substitution eliminates the reliability issues associated with optical detection in contaminated conditions.
3Adaptability or versatility
If plastic carrier bags are used for waste transport, then any bag can be used, but the bags may open during transport causing waste to spread
Solution Approach 1:
A closing means with an RFID identifier is attached to the waste bag before transport. This closing mechanism (such as a clip, clamp, or seal) is pre-applied to secure the bag contents, preventing the bag from opening during transportation. The RFID identifier on the closing means provides both the identification function and the mechanical securing function.
4Ease of operation
If multiple disposal points are used for different waste types, then waste sorting can be performed at source, but the system complexity increases
Solution Approach 1:
The system uses a universal RFID identification approach where a single type of waste bag with an RFID tag can be used for all waste types. The RFID reader at the disposal point reads the tag to identify the waste type, eliminating the need for multiple specialized disposal points or color-coded bag systems. This universal approach simplifies the overall system while maintaining sorting capability.
Data Source
AI summary
A method for sorting wastes wherein waste or recyclable material is supplied in carrier bags. A sorting apparatus includes a conveyor provided for receiving the carrier bags for separation from each other by guiding the carrier bags into containers according to an allotment. An RFID identifier is connected to each carrier bag. A closing member is provided with the RFID identifier in closing, or as verification of closing. At least one sensor is utilized on the basis of the information read from the RFID identifier of the closing member. At least one handling device, such as a robot, is provided wherein the at least one handling device is controlled to transfer the carrier bags to be sorted from the conveyor into the different allotments on the basis of the information given by the RFID identifiers. The invention also relates to an apparatus.