Paper Sheet Transport Using Partial Feature Detection Before Discharge
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Solution Overview
Problem
When a banknote is transported in a device where the transport route length from a detector to a discharge port is shorter than the banknote's length, the leading end protrudes from the discharge port before complete detection, risking the banknote being pulled out.
Innovation Solution
A paper sheet transport device with a recognition sensor positioned closer to the discharge port than the banknote's length, allowing type judgment based on a portion of the banknote before it fully exits, using a control unit to determine discharge eligibility.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of moving object
If the transport route length from detector to discharge port is shorter than the banknote length, then the device size is reduced and processing speed is improved, but the leading end of the banknote protrudes from the discharge port before complete detection, risking premature ejection
Solution Approach 1:
The system performs preliminary authentication of the entire banknote before discharge, then uses only partial detection (feature quantity of portion) for discharge determination. This preliminary action allows the device to be compact while maintaining reliability by having already verified the banknote's authenticity beforehand.
Solution Approach 2:
Instead of requiring complete detection of the entire banknote at discharge, the system uses partial detection - reading feature quantity from only a portion of the banknote (e.g., leading end or intermediate part). This partial action is sufficient for discharge determination since authentication was already performed, resolving the contradiction between compact size and detection accuracy.
2Productivity
If the recognition sensor is positioned closer to the discharge port, then the transport route length is reduced enabling faster processing and smaller device size, but the detection time is shortened reducing measurement precision
Solution Approach 1:
The system performs complete authentication detection beforehand when the banknote is in a more favorable detection position, then uses only partial feature quantity reading at discharge. This preliminary action ensures measurement precision is maintained while allowing the sensor to be positioned for faster discharge processing.
Solution Approach 2:
The system uses partial detection (reading feature quantity from only a portion of the banknote) at discharge rather than complete detection. This partial action is sufficient for discharge determination and allows the recognition sensor to be positioned closer to the discharge port for faster processing without compromising overall system reliability.
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
Enables accurate discharge determination even with partial detection, preventing premature ejection and ensuring secure handling of banknotes, while allowing device miniaturization and faster processing.
Implementation Method 1
a recognition sensor that is arranged on a transport route for the paper sheet toward the paper sheet discharge port to read a feature quantity of the paper sheet transported on the transport route
Data Source
AI summary
The present invention enables determination as to whether a banknote 100 is to be discharged even when only the feature quantity of a portion of the banknote is acquired at the time of discharging the banknote in a case in which a transport route length L1 from a reading position 18a of an optical recognition sensor 18 to an inlet/outlet 12 as a banknote discharge port is shorter than a total length LA of the banknote in a transport direction. At the time of discharging the banknote 100 already authenticated, a control unit 200 judges the type (denomination) of the banknote on the basis of a feature quantity of a reading target 103 that passes the optical recognition sensor 18 before a leading end 100a of the banknote 100 transported in a discharge direction protrudes to outside the device from the inlet/outlet 12.