Spacing Protrusions for ATM Sensor Gap Stability
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Solution Overview
Problem
Maintaining a constant gap between a paper money discriminating sensor and the conveying surface in ATMs is challenging due to manufacturing and assembly tolerances, affecting the sensor's sensitivity and accuracy in distinguishing counterfeit money.
Innovation Solution
The implementation of spacing protrusions on the lower body of the ATM, which contact the paper money discriminating sensor, combined with coil springs and spring fasteners, ensures a consistent gap of 2 mm, independent of manufacturing and assembly tolerances, by applying an elastic force to maintain contact with the sensor.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a bracket and fasteners are used to fix the paper money discriminating sensor, then the sensor can be securely mounted, but manufacturing tolerance and assembly tolerance cause the gap between the sensor and paper money to vary, deteriorating sensitivity
Solution Approach 1:
A spacing protrusion is introduced as an intermediary element between the sensor and the lower body. This protrusion serves as a mechanical mediator that defines and maintains a precise gap distance, eliminating the need for complex bracket assemblies and ensuring consistent sensor positioning regardless of manufacturing tolerances
Solution Approach 2:
The gap distance parameter is controlled by changing the physical dimension of the spacing protrusion. By precisely controlling the height of the protrusion, the optimal gap between the sensor and paper money is maintained, directly addressing the sensitivity requirement while simplifying the mounting structure
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 solution allows for accurate and consistent paper money discrimination by maintaining a predetermined gap between the sensor and the conveying surface, enhancing the sensitivity and reliability of the paper money discriminating apparatus.
Implementation Method 1
spacing springs may be provided on an upper surface of the fixing bracket so that elastic force is applied downwardly and both end portions of the paper money discriminating sensor come in contact with upper surfaces of the spacing protrusions
Data Source
AI summary
A structure maintains a gap in a paper money discriminating apparatus that may be provided in an automatic teller machine. The structure may include a paper money discriminating sensor that is provided in an upper body to discriminate whether a paper money to be conveyed along a conveyance path is counterfeit money, a lower body that is provided so as to face the paper money discriminating sensor with a predetermined gap therebetween, and spacing protrusions that protrude upward from an upper surface of the lower body and come in contact with both end portions of the paper money discriminating sensor so as to maintain a constant gap between a lower surface of the paper money discriminating sensor and the upper surface of the lower body.