Bill Storage Jam Detection via Sensor Monitoring
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Conventional automatic cash transaction apparatuses face issues in accurately detecting abnormalities, such as jams, due to discrepancies between pulse counts stored in memory and actual bill positions after a failure occurs, leading to potential errors in rewinding operations.
Innovation Solution
A medium storing device with a drum and delivering roller system that includes a monitor for the conveying path between the winding start position and the delivering roller, allowing for jam detection independent of drum rotation, thereby preventing erroneous rewinding and ensuring accurate abnormality detection.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If pulse count stored in memory is used to monitor bill positions after failure, then rewinding operation can be restored, but actual bill positions become shifted causing erroneous detection
Solution Approach 1:
The patent applies preliminary action by resetting the pulse count to zero at the winding start position before beginning the rewinding operation. This preliminary reset ensures that the monitoring system starts from a known accurate reference point, preventing the accumulation of positional errors that would otherwise occur after manual drum rotation or failure recovery. The pulse count is initialized to zero when the bill reaches the winding start position, establishing an accurate baseline for subsequent position monitoring.
2Measurement precision
If monitoring is disabled during reset operation to avoid erroneous detection, then false error messages are prevented, but actual jams cannot be detected
Solution Approach 1:
The patent replaces the mechanical pulse count-based monitoring system with an optical sensor-based monitoring system during reset operations. The optical sensor directly detects the presence or absence of bills in the conveying path between the drum and delivering roller, independent of the drum's rotation amount or pulse count. This substitution allows accurate jam detection during reset operations without being affected by the discrepancies between stored pulse counts and actual bill positions.
3Ease of operation
If drum is manually rotated after failure, then apparatus can be reset, but relationship between pulse count and bill position becomes inaccurate
Solution Approach 1:
The patent applies self-service by automatically resetting the pulse count to zero when the bill reaches the winding start position during the reset operation, without requiring manual intervention to recalibrate the monitoring system. The system automatically detects when the bill is at the correct starting position and initializes the pulse count accordingly, enabling the monitoring system to self-correct after manual drum rotation or failure recovery.
Data Source
AI summary
A temporary storage in a medium storing device carries out ON/OFF monitoring of a jam sensor between a winding start position of a drum and a clamp point of a delivering roller. Accordingly, when bills are rewound in the reset operation, even when a relationship between a pulse count and a bill position becomes different from actual one, it is possible to detect, without using a pulse count, a jam between the winding start position and the clamp point. It is possible to more securely detect the abnormality in bill storing in comparison with the prior art.