Currency Handling Device Recirculation to Reduce False Rejections
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Solution Overview
Problem
Conventional currency processing devices often incorrectly identify normal currency as abnormal, leading to unnecessary rejection and return, which complicates the handling and management of currency.
Innovation Solution
A currency handling device that includes a transport path for recirculating currency identified as abnormal, allowing for re-identification before determining its final disposition, ensuring accurate classification and reducing incorrect rejections.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If currency is identified once by the recognition sensor, then the identification speed is fast, but the accuracy is insufficient leading to incorrect rejections
Solution Approach 1:
The system performs preliminary identification of currency using the recognition sensor before final determination. When currency is initially identified as abnormal, it is not immediately rejected but rather sent back along the transport path for re-identification, allowing the system to correct initial misidentifications before final disposal occurs
Solution Approach 2:
The system implements feedback by circulating currency that was initially identified as abnormal back through the recognition sensor for re-evaluation. This feedback loop allows the system to correct identification errors and adjust its determination based on additional sensing data, thereby improving overall accuracy
2Reliability
If rejected currency is immediately returned to the user, then the handling process is simple, but the reliability of rejection is compromised due to potential misidentification
Solution Approach 1:
Before final rejection occurs, the system performs preliminary re-identification of currency marked as abnormal. This preliminary action ensures that currency is only rejected after thorough verification, improving reliability while adding a defined step to the handling process
Solution Approach 2:
The system uses feedback by sending abnormally identified currency back through the recognition sensor for re-evaluation before final rejection. This feedback mechanism ensures reliable rejection decisions while establishing a clear, manageable process flow
3Measurement precision
If the transport path is extended to allow recirculation, then the re-identification capability is improved, but the device complexity increases
Solution Approach 1:
The transport path is designed as a circular or curved route that allows currency to circulate back through the recognition sensor. This curved geometry enables compact recirculation without requiring a completely separate transport system, balancing re-identification capability with device complexity
Solution Approach 2:
The transport path serves multiple functions: it moves normally identified currency to the storage unit, circulates abnormally identified currency back for re-identification, and facilitates final rejection returns. This multi-functionality reduces the need for separate dedicated paths, managing complexity while enabling re-identification
Data Source
AI summary
A currency processing device comprises a deposit port that receives currency; a transport which transports the currency fed from the deposit port along the transport path; a recognition sensor that recognizes the currency transported on the transport path as normal or abnormal; a currency storage to store the currency; a reject port for returning the currency; and processing circuitry. The processing circuitry is configured to control the transport to transfer the currency recognized as normal by the recognition sensor to the currency storage for storage in the currency storage, and control the transport to transport the currency recognized as abnormal by the recognition sensor to be recirculated along the transport path to the recognition sensor to re-recognize the currency at least once, and to return the currency to the reject port based on a result of re-recognition by the recognition sensor.