Banknote Handling Gate Timing Control for Conveyance Accuracy
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Solution Overview
Problem
Banknote handling apparatuses face conveyance errors due to delayed detection of polymer-treated or damaged banknotes, leading to improper timing of gate switching and potential collisions.
Innovation Solution
A banknote handling apparatus with a distinguishing unit, detection unit, and drive control unit that adjusts the timing of gate switching based on the positional relationship between the detected banknote and a preceding banknote, ensuring accurate conveyance to the correct cassette.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the gate portion is driven after a predetermined time has elapsed since optical sensor detection, then the gate switching timing is synchronized for normal banknotes, but detection is delayed for polymer-treated or damaged banknotes causing conveyance errors
Solution Approach 1:
The gate drive timing is made dynamic rather than fixed. The control unit adjusts the gate drive timing based on the detected positional relationship between the leading end of the current banknote and the leading end of the forward banknote. When the positional relationship indicates a larger gap (as with polymer-treated or damaged banknotes), the gate drive timing is advanced accordingly, ensuring reliable conveyance for all banknote types.
Solution Approach 2:
The system uses feedback from the optical sensor to detect the positional relationship between consecutive banknotes. This detection information is fed back to the control unit, which then adjusts the gate drive timing based on the actual detected positions rather than relying on predetermined fixed timing, thereby resolving the detection delay issue for special banknote types.
2Ease of operation
If fixed timing gate switching is used, then control is simple for normal banknotes, but conveyance errors occur when detection is delayed for special banknote types
Solution Approach 1:
The gate drive timing is made dynamic rather than fixed. The control unit adjusts the gate drive timing based on the detected positional relationship between the leading end of the current banknote and the leading end of the forward banknote. When the positional relationship indicates a larger gap (as with polymer-treated or damaged banknotes), the gate drive timing is advanced accordingly, ensuring reliable conveyance for all banknote types.
Solution Approach 2:
The system uses feedback from the optical sensor to detect the positional relationship between consecutive banknotes. This detection information is fed back to the control unit, which then adjusts the gate drive timing based on the actual detected positions rather than relying on predetermined fixed timing, thereby resolving the detection delay issue for special banknote types.
Data Source
AI summary
A banknote handling apparatus includes a plurality of storage mechanisms that are provided for each type of paper sheet and store a corresponding paper sheet, a distinguishing unit that distinguishes a first paper sheet input, a detection unit that detects that the first paper sheet is conveyed to a corresponding storage mechanism specified according to a result of distinguishing, and a drive control unit that controls driving of a gate portion that switches a conveyance pathway to the corresponding storage mechanism according to a positional relationship between the first paper sheet and a forward paper sheet conveyed earlier than the first paper sheet when conveyance of the first paper sheet is detected.