Paper Sheet Handling System Accelerated Counting Rejection
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Solution Overview
Problem
Conventional paper sheet handling systems reject subsequent sheets already fed when counting is accelerated, leading to inefficiencies and increased rejections.
Innovation Solution
A paper sheet handling system that includes a paper sheet identification device and a counting device, utilizing a first feeding unit, read units, storage units, and a transport control unit to manage the feeding and acceptance of paper sheets, ensuring accurate counting without rejecting sheets already fed, by maintaining a count of remaining sheets and stopping the feeding process when the batch quantity is reached.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If paper sheets are fed in advance before recognition is completed to accelerate counting, then productivity is improved, but the subsequent paper sheet already fed is rejected causing loss of time
Solution Approach 1:
The system performs preliminary actions by feeding the next paper sheet in advance while the current sheet is being recognized. The feeding unit continues to feed sheets sequentially, and the recognition unit processes each sheet as it passes. This allows the system to maintain continuous operation without waiting for each recognition cycle to complete before feeding the next sheet, thereby accelerating the overall counting process while avoiding rejection of pre-fed sheets through proper coordination of feeding and recognition timing
Solution Approach 2:
The system uses feedback mechanisms where the recognition unit continuously provides information about the current sheet being processed, and the control unit uses this feedback to coordinate the feeding unit's operation. The feeding unit adjusts its operation based on feedback from the recognition unit, ensuring that sheets are fed at optimal intervals that maximize throughput while maintaining accurate recognition, thus preventing rejection of sheets fed in advance
2Measurement precision
If the feeding unit stops when batch quantity is reached, then counting precision is improved, but the already fed subsequent sheet is rejected causing device complexity
Solution Approach 1:
The control unit is programmed with preliminary knowledge of the target batch quantity N and the feed-out number K. Before the recognition unit finishes processing the Nth sheet, the control unit has already determined when to stop feeding (when the Kth sheet is fed). This preliminary determination allows the system to stop feeding at the precise moment when the batch quantity is reached, ensuring accurate counting while avoiding the need for complex real-time decision-making mechanisms
Solution Approach 2:
The system uses data copying where the control unit stores information about the batch quantity N and feed-out number K in memory. The control logic is pre-copied into the control unit, allowing it to automatically execute the stopping condition without requiring complex external control mechanisms. This simplifies the device by using straightforward data storage and comparison operations rather than complex control circuitry
Data Source
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AI summary
An object of the present invention is to prevent rejection of a subsequent paper sheet even if counting of paper sheets is accelerated. Provided is a paper sheet handling system including a paper sheet identification device that identifies paper sheets, and a paper sheet counting device that counts the paper sheets identified by the paper sheet identification device. The paper sheet handling system generates previous process data including read specific codes in the order of fed paper sheets, and memorizes therein the feed-out number K of paper sheets that have been already fed at the point in time when a specific code of one paper sheet is read. A batch quantity N is an integer larger than the feed-out number K. Every time the specific code is read, the specific code is matched with the previous process data, to specify the Zth paper sheet from the paper sheet with the matched specific code as a batch expected paper sheet. Specific codes from the batch expected paper sheet to the paper sheet K before thereof are extracted from the previous process data. When it is judged that any of the specific codes from the batch expected paper sheet to the paper sheet K before thereof matches with the read specific code, an operation of a second feeding unit is stopped.