Automated Note Sorting by Damage Type
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Solution Overview
Problem
Conventional paper money processing apparatuses face inefficiencies in sorting and handling damaged notes, leading to clogged reject stackers and reduced processing efficiency due to manual sorting requirements and inability to differentiate between fit and damaged notes without operator intervention.
Innovation Solution
A paper processing apparatus equipped with a setting section, feeding device, transport device, and a judging device that discriminates between fit and damaged notes, sorting them into multiple stacking boxes based on types and levels of damage and dirt, allowing for automated sorting and collection.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If all rejected notes are collected in a single reject stacker, then the system is simple to operate, but the reject stacker becomes full immediately and processing efficiency is lowered
Solution Approach 1:
The reject stacker is divided into multiple sub-stackers (first reject stacker, second reject stacker, third reject stacker) that sort and store different types of rejected notes separately. This segmentation allows notes to be categorized by rejection reason (e.g., skewed, multiple feeding, damaged), preventing any single stacker from becoming overloaded and improving overall processing efficiency.
2Measurement precision
If manual sorting is required to separate fit notes from damaged notes in the reject stacker, then accurate classification is achieved, but the work becomes cumbersome and processing efficiency is extremely lowered
Solution Approach 1:
The manual mechanical sorting process is replaced with an automated detection system using imaging devices and image processing algorithms. The system automatically detects note conditions (skewed, multiple feeding, damaged, dirty) and routes notes to appropriate stackers, achieving both accurate classification and high processing efficiency without manual intervention.
3Device complexity
If the reject stacker collects various types of damaged notes together, then collection is simple, but the stacker becomes full immediately and requires frequent emptying
Solution Approach 1:
The collection system is segmented into multiple specialized stackers (first reject stacker for skewed/multiple feeding notes, second reject stacker for damaged notes, third reject stacker for dirty notes). Each stacker has a specific function and fills up at different rates, reducing the frequency of emptying operations and improving operational efficiency.
4Reliability
If fit notes are reprocessed after being rejected, then quality control is maintained, but the feeding operation is stopped and processing efficiency is lowered
Solution Approach 1:
Fit notes that are mistakenly rejected are extracted from the general reject pile by the imaging device, which identifies them as acceptable. These notes are then routed to a return stacker for reprocessing, while the main feeding operation continues uninterrupted. This separation allows quality control to be maintained without stopping the overall feeding process.
Data Source
AI summary
A paper processing apparatus includes a setting section which sets a piece of paper, a feeding device which takes in the piece of paper set at this setting section, a transport device which transports the piece of paper took in by the feeding device, a judging section (detector) which discriminates whether or not the piece of paper transported by the transport device is a damaged note and discriminates types of damage and dirt of the piece of paper discriminated to be the damaged note, and a plurality of stacking boxes which carry out sorting and collection according to the types of damage and dirt discriminated by the judging section (detector).