Winding Drum Diameter Detection for Banknote Storage Reliability
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Solution Overview
Problem
Banknote storage devices face reliability issues when winding folded or wrinkled banknotes, as the increased winding diameter of the drum can interfere with the conveying path, leading to potential damage and reduced operational reliability.
Innovation Solution
Incorporating a second detection unit that detects when the winding drum's outer diameter exceeds a predetermined size, allowing for timely cessation of the winding operation to prevent interference with the conveying path and subsequent damage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of moving object
If the conveying path of the tape is disposed to pass near the outer diameter of the winding drum to reduce the entire size of the banknote storage device, then the device size is reduced, but the winding drum of which the outer diameter becomes equal to or larger than a predetermined outer diameter may interfere with the conveying path of the tape
Solution Approach 1:
The patent applies preliminary action by detecting the outer diameter of the winding drum before interference with the conveying path occurs. The detection unit measures the drum's diameter during the winding process and provides advance warning, allowing the system to take preventive action (stop winding) before the harmful interference happens, thus maintaining both compact design and operational reliability
Solution Approach 2:
The patent implements feedback by using a detection unit that continuously monitors the outer diameter of the winding drum and provides real-time information to the control unit. This feedback mechanism allows the system to adjust its operation dynamically, stopping the winding process when the detected diameter approaches the predetermined limit, thereby preventing interference with the tape conveying path while maintaining compact device dimensions
2Quantity of substance
If folded or wrinkled banknotes are wound around the winding drum, then the winding diameter of the drum increases, but this increased diameter may interfere with the conveying path of the tape
Solution Approach 1:
The detection unit performs preliminary measurement of the winding drum's outer diameter during the winding process. When folded or wrinkled banknotes cause the diameter to increase, the detection unit identifies this change in advance and alerts the control unit, enabling preventive stopping of the winding operation before the increased diameter interferes with the tape conveying path
Solution Approach 2:
The system uses feedback from the detection unit that continuously monitors the winding drum's outer diameter. When the detected diameter indicates potential interference with the conveying path, the feedback signal triggers the control unit to stop the winding process, thus preventing damage while allowing maximum storage of banknotes including those that are folded or wrinkled
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This solution effectively prevents damage to the winding drum and other components by stopping the winding process before interference occurs, enhancing the reliability and durability of the banknote storage operation.
Implementation Method 1
The detection unit 116 includes a light emitting unit 116a that emits detection light to the tape 114 supplied from the supply reel 112 and a light receiving unit 116b that receives the detection light
Data Source
AI summary
A paper sheet storage device includes a supply reel that supplies a rolled tape; a winding drum around which a banknote is wound together with the tape supplied from the supply reel; a first detection unit that detects a supply amount of the tape supplied from the supply reel; and a second detection unit that detects the winding drum of which the outer diameter becomes equal to or larger than a predetermined outer diameter when the banknote is wound around the winding drum together with the tape.