Edge Sensing Apparatus for ATM Paper Alignment
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Solution Overview
Problem
Automated transaction machines (ATMs) face challenges in accurately detecting and aligning the edges of paper documents, such as checks or currency, which is crucial for proper transportation and storage within the machine.
Innovation Solution
An edge sensing apparatus is configured within the ATM, utilizing a light emitter and detector positioned on one side of the paper path, with a light guiding trough on the opposite side to enhance light transmission and detection. This setup allows for precise detection of paper edges, ensuring proper alignment and handling.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a light emitter and detector are positioned on opposite sides of the paper path, then light transmission and detection are improved, but device complexity increases
Solution Approach 1:
A light guiding trough is introduced as an intermediary component to conduct light from the emitter on the first side of the path to the detector on the second side. The trough has a light-transmitting body that guides light through its interior, with first and second faces positioned to receive and detect light respectively. This mediator enables accurate edge detection across the paper path while maintaining a manageable device structure.
2Loss of energy
If the light guiding trough is positioned with faces confronting the emitter and detector, then light guidance efficiency is improved, but alignment difficulty increases
Solution Approach 1:
The light guiding trough is designed with its longitudinal axis substantially parallel to the paper path, and its first and second faces positioned to be substantially perpendicular to the paper path. This creates an equipotential alignment where the trough's optical axis aligns with the paper transport direction, minimizing misalignment issues and simplifying the manufacturing and assembly process while maintaining high light transmission efficiency.
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 edge sensing apparatus effectively detects paper edges, enabling the ATM to center and align documents accurately, which improves the reliability of document handling and reading of magnetic ink character recognition (MICR) lines.
Implementation Method 1
a light emitter on the first side of the path, with the light emitter positioned so that the light emitter can emit light across the path to the second side
Implementation Method 2
a light detector on the first side of the path with the light emitter, and the light detector can be configured to detect light from the light emitter
Implementation Method 3
The light can then enter the light guiding trough through the first face along the primary light axis, then reflect off of the first internal reflective plane in a second direction toward the second internal reflective plane. The light can then reflect off of the second internal reflective plane in a third direction toward the second face toward the light detector.
Data Source
AI summary
A sensing apparatus can be configured to detect an edge of a paper that is received by an automated transaction machine (ATM). The paper can move along a path located inside the ATM, the path having opposite first and second sides. The sensing apparatus can include a light emitter and a light detector on the first side of the path, with the light emitter positioned so that it can emit light across the path to the second side. The light detector can be configured to detect light from the light emitter and can emit a signal corresponding to an amount of detected light. The sensing apparatus can also include a control circuit that can control a flow of power to the light emitter, and the control circuit can also receive the signal emitted by the sensor.