ATM Media Alignment Sensor Using Reflection Member
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Solution Overview
Problem
Conventional automatic teller machines (ATMs) face reliability issues in aligning paper media such as cash and checks of different sizes and types, leading to errors in recognition and reduced operational reliability.
Innovation Solution
A medium alignment apparatus equipped with an alignment sensor portion using a transmission and reflection member setup, emitting and reflecting detection signals to accurately determine the aligned state of paper media, ensuring correct alignment and operation irrespective of other structural components.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a conventional alignment sensor is used to detect the aligned state of paper medium, then the structure is simple, but the detection accuracy is low leading to alignment errors
Solution Approach 1:
A reflection member is introduced as an intermediary component between the alignment sensor and the paper medium. The reflection member reflects the detection signal from the alignment sensor to accurately detect whether the paper medium is in contact with the alignment reference surface, thereby improving detection accuracy without requiring direct contact between the sensor and the medium.
Solution Approach 2:
The conventional direct-contact mechanical detection method is replaced with an optical detection system using an alignment sensor and reflection member. This substitution eliminates mechanical wear and improves detection precision by using light-based sensing to determine alignment status.
2Measurement precision
If the alignment sensor is positioned close to the alignment body, then the detection is sensitive, but the sensor operation is interfered with by the movement of the alignment body
Solution Approach 1:
The reflection member serves as a mediator that decouples the sensor from the moving alignment body. The sensor remains stationary while the reflection member moves with the alignment body, allowing the detection signal to track the position changes without the sensor itself being disturbed by mechanical movements.
Solution Approach 2:
The detection system is segmented into a stationary sensor portion and a movable reflection member portion. This segmentation allows the sensor to remain fixed in a stable position while the reflection member moves independently to follow the alignment body's movement, eliminating interference between sensor operation and body movement.
3Ease of operation
If the alignment sensor detects paper medium directly, then the detection is straightforward, but the detection is affected by variations in paper medium properties
Solution Approach 1:
The reflection member acts as an intermediary that detects the presence and position of the paper medium indirectly through optical reflection. This indirect detection method is less sensitive to variations in paper medium properties such as color, texture, or material composition, thereby improving detection consistency across different types of paper media.
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 apparatus reliably aligns mixed paper media, including cash and checks, enhancing recognition accuracy and operational reliability by securely detecting the aligned state and adjusting alignment rollers based on sensor feedback.
Implementation Method 1
a reflection member disposed at an opposite side of the second body, facing the transmission member, with respect to the alignment reference surface and configured to reflect the detection signal
Data Source
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AI summary
A medium alignment apparatus (150) may include an alignment body (151) to form a transfer path for passage of a medium (P) and includes an alignment reference surface (155s) for alignment of the medium, an alignment roller portion (160) mounted to the alignment body to align the medium while driving the medium simultaneously, and at least one alignment sensor portion (180) to detect whether the medium is aligned by detecting a position of the medium passing along the transfer path. The alignment body may include a first body (152) forming a transfer path for the medium, to which the alignment roller portion is mounted, and a second body (155) disposed at one side of the first body to be movable relative to the first body at a speed corresponding to a transfer speed of the medium, providing a side directed to the first body as the alignment reference surface.