ATM Shutter Abnormality Detection and Bill Access Control
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Solution Overview
Problem
Conventional automatic transaction devices are vulnerable to unauthorized access when the customer side shutter is tampered with, and existing solutions disrupt transactions, burdening customers with the need to restart processes upon detecting abnormalities.
Innovation Solution
An automatic transaction device with a customer service port, a shutter, a sensor to detect abnormalities, and a control unit that changes the bill holding unit's state to inaccessible when an abnormality is detected, preventing unauthorized access and allowing seamless transaction resumption.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the customer side shutter is made not to open by an unauthorized person using glue, then the unauthorized person cannot access bills through normal operation, but legitimate customers cannot retrieve their bills and must leave to inform a clerk, creating inconvenience and potential security gaps
Solution Approach 1:
The system performs preliminary detection of shutter abnormalities using sensors before the customer encounters the problem. When a shutter fails to open properly, the system detects this abnormality in advance and automatically triggers a response sequence, including notifying staff and preparing alternative bill delivery methods, so that legitimate customers are not blocked by tampered shutters
Solution Approach 2:
The system implements feedback mechanisms where sensors continuously monitor shutter status and provide real-time information to the control unit. When abnormality is detected, the system provides feedback to both the customer service system (to notify staff) and the bill delivery system (to activate alternative delivery), creating a closed-loop response that maintains service continuity
2Reliability
If conventional systems detect shutter abnormality and take bills into a temporary storage unit, then security is maintained, but customers must operate from the beginning again when resuming transaction
Solution Approach 1:
When shutter abnormality is detected, the system preliminarily secures bills in a controlled manner but maintains transaction context information. The system prepares the bill delivery path and holds bills in a secure intermediate state rather than completely retracting them to temporary storage, so that when the abnormality is resolved, bills can be quickly delivered without requiring customer restart
Solution Approach 2:
The system maintains the continuity of the transaction process by preserving the transaction context and bill delivery state even when shutter abnormalities occur. Rather than completely interrupting and resetting the transaction, the system holds the process in a suspended state and automatically resumes it when normal operation is restored, eliminating the need for customers to restart from the beginning
3Ease of operation
If the device side shutter is opened to allow customer access, then legitimate customers can retrieve bills, but unauthorized persons can easily access bills when the customer side shutter is tampered with
Solution Approach 1:
The system introduces an intermediary control mechanism between the shutters and bill access. The control unit acts as a mediator that receives signals from both shutters and determines bill delivery based on the combined status. Only when both shutters are properly closed does the system allow bill accumulation, and bills are only delivered when the control unit verifies proper shutter operation, preventing unauthorized access even if one shutter is tampered with
Solution Approach 2:
The control unit receives feedback from sensors monitoring both the customer side shutter and device side shutter. Based on this feedback, the control unit intelligently determines whether to allow bill accumulation or delivery. When abnormality is detected in either shutter, the system adjusts its behavior to maintain security while preserving legitimate customer access through alternative mechanisms
Data Source
AI summary
An automatic transaction device includes: a customer service port that accumulates and holds bills so as to be accessible from a customer side; a shutter that closes a deposit/withdrawal port of the customer service port; a sensor that detects an abnormality of the shutter; a bill holding unit that holds accumulated bills, and changes a state in the customer service port from a state in which the bills can be accessed from the customer side to an inaccessible state; and a control unit that controls a change of state of the bill holding unit and an opening and closing operation of the shutter, wherein, in a case in which an abnormality of the shutter is detected, the control unit changes the state of the bill holding unit to the inaccessible state from the customer side.