Value Document Stack Feed Control via Brightness Evaluation
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Solution Overview
Problem
Existing methods for processing value documents struggle with recognizing edges in densely or poorly stacked document stacks, leading to inadequate control over the feed process, potentially causing damage or inefficiency.
Innovation Solution
The solution involves controlling the feed of value document stacks based on brightness evaluation when edge recognition is insufficient, assuming dense stacks are in good condition and reducing feed speed, and maintaining or stopping the process when edges cannot be recognized, using an image sensor and evaluation device to adjust feed speed and singling rate accordingly.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If image processing methods are used to recognize value document edges, then the density of the value document stack can be determined and the feed can be controlled, but edge recognition fails for densely or poorly stacked documents
Solution Approach 1:
The patent introduces brightness as an intermediary parameter to bridge the gap between edge recognition failure and feed control. When edge recognition fails, brightness evaluation serves as a mediator to infer stack density and control feed speed, ensuring continuous reliable operation without direct edge detection
Solution Approach 2:
The patent changes the evaluation parameter from edge-based geometric features to brightness-based optical properties. By monitoring brightness variations in the image, the system can infer stack density and control feed speed even when edge recognition fails, thus maintaining feed control reliability
2Productivity
If the feed speed is increased to improve processing efficiency, then productivity increases, but densely stacked documents may be damaged or the stack may become disordered
Solution Approach 1:
The patent implements a feedback mechanism where brightness evaluation continuously monitors the value document stack condition. Based on the brightness signal indicating stack density, the system automatically adjusts feed speed - reducing it for dense stacks to prevent damage while maintaining higher speeds for properly stacked documents, thus optimizing productivity without causing harm
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 approach ensures safe and efficient handling of value document stacks by slowing down or stopping the feed for densely stacked documents and maintaining or reducing the feed speed for poorly stacked ones, preventing damage and optimizing the processing efficiency.
Implementation Method 1
an image of a side of the value document stack is recorded
Data Source
AI summary
For continuously singling value documents from a value document stack, the value document stack is lifted and fed toward the singler. For controlling the feed of the value document stack, an image of a side of the value document stack is recorded and evaluated, in order to recognize the edges of the individual value documents. The feed of the value document stack is controlled in dependence on the number of value document edges which are ascertained in the recorded image. If the number of value document edges cannot, or not sufficiently, be ascertained, additionally a brightness of the image in this image portion is ascertained. Upon the singling of the value documents imaged in this image portion the feed of the value document stack is controlled in dependence on the brightness ascertained in this image portion.