Banknote Storage Motor Control for Energy Reduction
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Solution Overview
Problem
Banknote handling apparatuses consume wasteful power as motors remain activated until all banknotes are stored, even when there are no more banknotes of a specific denomination in the temporary storage.
Innovation Solution
A banknote handling apparatus with a distinguishing unit, temporary storage, and multiple storage mechanisms, where a determination unit sets the conveyance order and a drive control unit activates and stops motors based on this order, ensuring only necessary motors are used for storage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the motor of a cassette continues to be activated until all banknotes are stored in each cassette, then the banknote storage process is completed, but wasteful power is consumed
Solution Approach 1:
The control unit determines the conveyance order of banknotes from the temporary storage to cassettes before actually performing the storage operation. By pre-calculating which cassettes will be needed and in what sequence, the system can activate motors only when necessary, avoiding continuous activation after the last needed banknote is stored.
Solution Approach 2:
The motor activation state is made dynamic rather than static. The control unit adjusts the activation state of cassette motors based on the current conveyance order and storage needs. Motors are activated only when a banknote needs to be stored in that cassette, and deactivated when no more banknotes need to be stored, allowing flexible adaptation to varying storage requirements.
2Productivity
If the motor of a cassette is activated continuously for all banknotes, then all banknotes can be stored, but the motor remains rotated unnecessarily after the last banknote is stored
Solution Approach 1:
The control unit receives feedback information about the conveyance order and storage status from the distinguishing unit and temporary storage. Based on this feedback, the control unit determines exactly when to activate and deactivate cassette motors, ensuring motors are running only during the necessary storage operation and stopping immediately after the last banknote is stored, thereby reducing unnecessary motor operation time.
3Ease of operation
If the motor of a cassette corresponding to a denomination continues to be activated after no more banknotes of that denomination are available, then the storage process is simplified, but wasteful power is consumed
Solution Approach 1:
The control unit performs preliminary determination of the conveyance order based on the distinguishing results before initiating motor activation. This pre-planning allows the system to know exactly which cassettes will be needed and for how long, enabling simplified control logic while avoiding continuous motor activation. The motor is activated only for the specific duration needed to store the remaining banknotes of a denomination.
Data Source
AI summary
A banknote handling apparatus includes a distinguishing unit that distinguishes respective paper sheets input, a first storage mechanism that temporarily stores the respective paper sheets distinguished, a plurality of second storage mechanisms that are provided for each type of paper sheet and store the corresponding paper sheet, a determination unit that determines a conveyance order of conveying the respective paper sheets from the first storage mechanism to any of the second storage mechanisms on a basis of a result of distinguishing, and a drive control unit that controls activation and stop of respective drive apparatuses that, on a basis of the conveyance order, drive each of the plurality of second storage mechanisms to store the respective paper sheets in the corresponding second storage mechanism.