ATM Banknote Drawer Security with Sequential Gas Marking
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Solution Overview
Problem
Existing banknote drawers for ATMs and similar containers are vulnerable to theft and break-ins, particularly when attempts involve explosives or removal of the entire safe, and are challenging to invalidate banknotes when arranged vertically.
Innovation Solution
A banknote drawer with a dual security system that includes passive marking using pressurizable containers filled with marking fluid and active gas generators activated by break-in sensors, ensuring marking of banknotes regardless of orientation or removal attempt, with sequential gas generator activation and a power-saving design.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If passive marking containers are used, then the system responds to explosive break-ins, but it cannot detect or respond to attempts to remove the entire safe
Solution Approach 1:
The tilt sensor integrates multiple detection functions into a single device: it detects both explosive break-ins (through acceleration/impact) and safe removal attempts (through orientation changes). This universal sensor enables the system to respond to multiple types of threats with a single component, resolving the contradiction between specialized explosive response and general adaptability.
Solution Approach 2:
The patent combines passive marking containers (for explosive response) with active gas generators and tilt sensors (for safe removal detection) into a unified security system. The marking fluid containers and gas generators work together through the common control of the tilt sensor, merging previously separate security functions into an integrated system that handles both explosive break-ins and safe removal attempts.
2Volume of moving object
If banknote drawers are arranged vertically, then space is optimized, but it becomes difficult to invalidate banknotes effectively
Solution Approach 1:
The system uses tilt sensors to detect the vertical orientation of banknote drawers and dynamically adjusts the activation sequence of gas generators accordingly. When a vertical arrangement is detected, the system activates gas generators in a specific sequence that ensures marking fluid reaches banknotes regardless of their vertical position, maintaining invalidation effectiveness while preserving space-optimized vertical stacking.
Solution Approach 2:
The patent changes the operational parameters of the gas generators based on the detected orientation of the banknote drawer. The control system modifies activation timing, pressure, and sequencing parameters to ensure effective marking fluid distribution in vertical configurations, allowing the same system to handle both horizontal and vertical arrangements reliably.
3Reliability
If multiple gas generators are activated simultaneously, then marking coverage is maximized, but power consumption increases
Solution Approach 1:
The system activates gas generators in a periodic sequence rather than simultaneously, with staggered timing based on the detected drawer orientation. This sequential activation maintains comprehensive marking coverage by ensuring each generator has sufficient time to discharge marking fluid effectively, while significantly reducing peak power consumption compared to simultaneous activation of all generators.
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 system effectively renders banknotes unusable in any break-in scenario, including explosive attempts and safe removal, while optimizing power usage and ensuring comprehensive marking of banknotes across various orientations.
Implementation Method 1
A break in sensor detects a break-in attempt and activates a plurality of gas generators to rupture containing marking fluid in order to spoil banknotes
Data Source
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AI summary
It is provided a banknote drawer (1) for banknotes (55) for Bancomat, ATM and similar (50), comprising a safe (51) including a rack (53) for at least one said banknote drawer (1), the banknote drawer (1) defining an inner volume (1c) and comprising: at least a first container (2) disposed in the inner volume (1c) and comprising an internal portion (2a) facing the banknotes (55), and permeable to fluids, at least a second container (22) configured to contain marking fluid, fluid-tight and contained in the first container (2), break-in sensor means (6) suitable for detecting break-in attempts, active break-in means (4) comprising a plurality of gas generators (40) disposed in proximity to the second container (22) and suitable for breaking, when activated, the second container (22), so as to project the marking fluid onto the banknotes (55), the gas generators (40) being operable by means of an electric current, the banknote drawer (1) the active breaking means (4), comprising a control electronics (41), configured to provide, on command, electric current in sequence to each individual said gas generator (40), so as to so activate said gas generators (40) in sequence.