Transportation Guide Bend Part for Bank Note Sensor Accuracy
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Solution Overview
Problem
Automatic teller machines face challenges in enhancing the reliability and discrimination performance of bank note transportation and authentication processes.
Innovation Solution
A determination apparatus with a one side transportation guide, a sensor, and an other side transportation guide with a bend part, which secures a transportation space thickness and brings the medium close to the reading surface, improving the reliability and discrimination performance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the sensor reading surface is positioned close to the conveyance path to improve discrimination performance, then the reading accuracy is improved, but the transportation space becomes insufficient causing transportation reliability to deteriorate
Solution Approach 1:
The transportation guide has different surface configurations at different locations: the portion facing the reading surface has a bend part that creates a larger gap for transportation space, while other portions maintain normal contact for stable guidance. This local differentiation allows the guide to simultaneously ensure reliable transportation and adequate reading space.
Solution Approach 2:
The transportation guide surface is bent in the vertical dimension to create a step-like structure. This dimensional change allows the guide to maintain horizontal alignment for stable guidance while creating vertical clearance for the sensor reading surface, effectively decoupling the two constraints.
2Reliability
If the transportation space is enlarged to improve transportation reliability, then the transportation performance is improved, but the medium distance from the reading surface increases deteriorating discrimination performance
Solution Approach 1:
The transportation guide is designed with localized gap creation only at the specific position where the reading surface is located. Other portions of the guide maintain normal guidance function, ensuring that the medium remains close to the reading surface for accurate reading while providing sufficient space for reliable transportation.
Solution Approach 2:
The bend part is pre-formed in the transportation guide to create the appropriate gap before the medium reaches the reading surface. This preliminary structural preparation ensures that the medium is automatically positioned at the correct distance from the reading surface without requiring active control.
3Stability of the object's composition
If the transportation guide contacts the medium firmly to improve transportation control, then the transportation stability is improved, but the reading surface cannot be positioned close to the conveyance path
Solution Approach 1:
The transportation guide is segmented into different functional portions: a guidance portion that maintains firm contact for stable transportation, and a reading surface portion that creates a gap for accurate reading. This segmentation allows each portion to optimize its specific function without compromising the other.
Solution Approach 2:
The guide surface is bent in the vertical dimension to separate the guidance function (horizontal contact) from the reading function (vertical clearance). This dimensional separation allows the guide to maintain transportation stability through horizontal contact while enabling close reading surface positioning through vertical gap creation.
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
The solution enhances the reliability and discrimination performance of bank note transportation and authentication by maintaining a consistent transportation space thickness and ensuring accurate reading of bank note states.
Implementation Method 1
Some determination units internally have a magnetic detection unit that detects magnetic ink attached to bank notes
Implementation Method 2
an optical detection unit that detects images of bank notes
Implementation Method 3
a thickness detection unit that detects the thickness of bank notes
Data Source
AI summary
A determination apparatus includes a first transportation guide, disposed on one side of a conveyance path through which a medium travels when being transported, on which a first transportation surface is formed facing the conveyance path. A sensor, on which a reading surface that reads a state of the medium, is provided closer to a side of the first transportation guide than the conveyance path. A second transportation guide, disposed on another side of the conveyance path facing the first transportation guide across the path, on which a second transportation surface is formed facing the path, on which a space through which the medium is transported, is formed between the first and second transportation guides, and on which a bend part is formed, at a portion facing the reading surface, bent in a direction separating from the reading surface more than a portion not facing the reading surface.