Capacitive Electrode Patterning for Packaging Tamper Detection
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Solution Overview
Problem
Existing tamper detection methods for packaging are either costly or not accurate and reliable, and they often require physical inspection to detect tampering.
Innovation Solution
A tamper detection device comprising two electrodes with patterned structures arranged opposite to each other, with a detection unit that measures capacitance between the electrodes and determines the arrangement state, allowing for efficient and robust tamper detection.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If mechanical seals are applied to secure packaging against tampering, then security protection is provided, but physical inspection is required to detect tampering which reduces efficiency
Solution Approach 1:
The patent replaces mechanical seal inspection with an electronic capacitance-based detection system. The detection device uses capacitive sensors to automatically detect tampering events by measuring changes in capacitance values, eliminating the need for manual physical inspection of mechanical seals while maintaining high detection accuracy.
Solution Approach 2:
The patent introduces an electronic intermediary detection system between the packaging and the inspector. The detection device with capacitive sensors acts as an intermediary that automatically senses tampering events and provides objective detection results, removing the need for direct human physical inspection.
2Extent of automation
If electronic anti-tamper protections are applied to packaging, then automated detection is enabled, but the cost becomes very high which reduces cost-efficiency
Solution Approach 1:
The patent changes the detection parameter from complex electronic signals to simple capacitance measurements. By using capacitance as the detection parameter, the system achieves automated detection with low-cost components, avoiding expensive electronic anti-tamper technologies while maintaining automation capability.
Solution Approach 2:
The patent employs inexpensive capacitive sensors and simple electronic circuits for automated detection. The detection device uses low-cost components such as capacitors, resistors, and microcontrollers that can be manufactured at minimal cost, making automated tamper detection economically viable.
3Extent of automation
If conventional electronic anti-tamper protections are applied, then automated detection is achieved, but accuracy and reliability become not very high which compromises detection quality
Solution Approach 1:
The patent segments the detection process into multiple capacitance measurement points and uses pattern recognition algorithms to analyze the data. By dividing the detection into multiple measurement stages and using correlation analysis, the system achieves high accuracy in distinguishing between legitimate access and tampering events.
Solution Approach 2:
The patent implements feedback mechanisms where the detection device continuously monitors capacitance values and compares them against reference patterns. The system uses feedback from multiple measurement points and correlation analysis to dynamically adjust detection thresholds and improve detection accuracy and reliability.
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 solution enables accurate and cost-efficient tamper detection by measuring capacitance variations between the electrodes, effectively distinguishing between un-tampered and tampered states without the need for physical inspection.
Implementation Method 1
a first capacitance is measurable... in a second arrangement state... a second capacitance is measurable... wherein the first capacitance is different from the second capacitance
Data Source
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AI summary
It is described a tamper detection device (100) for detecting tampering with respect to a packaging (170), the device (100) comprising: i) a first electrode (110) comprising a first patterned structure (111), and ii) a second electrode (120) comprising a second patterned structure (121). The first electrode (110) and the second electrode (120) are arranged so that the first patterned structure (111) and the second patterned structure (121) are at least partially opposite to each other. In a first arrangement state of the first patterned structure (111) and the second patterned structure (121) with respect to each other, a first capacitance is measurable, in a second arrangement state of the first patterned structure (111) and the second patterned structure 121) with respect to each other, a second capacitance is measurable, wherein the first capacitance is different from the second capacitance, and wherein the first arrangement state is different from the second arrangement state. The device (100) further comprising: iii) a detection unit (130), wherein the detection unit (130) is configured to: a) measure the capacitance between the first electrode (110) and the second electrode (120), b) obtain, based on the measured capacitance, an information indicative of the arrangement state, and c) evaluate, based on the information indicative of the arrangement state, if a tampering with respect to the packaging (170) is detected.