Passive Tamper Detection via Friable RFID Circuit
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Solution Overview
Problem
The pharmaceutical industry faces challenges in controlling the handling and reducing the transport costs of temperature-sensitive and oxygen-sensitive biological products, as existing tamper detection methods are either unreliable for large quantities or increase the cost, size, and weight of security seals due to power requirements, and current RFID-based solutions either detect removal rather than direct container opening or are complex and expensive.
Innovation Solution
A passive electronic sensor system using a friable electrical connection element and RFID tag with a memory register, where the breaking of the connection changes the identification code from even to odd upon container opening, allowing remote and automatic tamper detection without manual inspection.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If electronic security seals are used to actively monitor for tampering, then tamper detection reliability is improved, but cost, size and weight increase due to power supply requirements
Solution Approach 1:
The patent removes the power supply component from the security seal system, extracting the energy source that increases weight. The solution uses a passive RFID tag that harvests energy from RF waves during scanning operations, eliminating the need for batteries or power cells while maintaining active monitoring capability.
Solution Approach 2:
The RFID tag performs self-powering by capturing energy from incoming RF scans through its antenna. The induced electrical current from the RF waves provides sufficient power for the tag to process tamper detection signals and transmit responses, making the system self-sufficient without external power sources.
2Weight of moving object
If passive RFID tags are used without power supply, then cost and size are reduced, but tamper detection capability is limited
Solution Approach 1:
The system performs preliminary tamper detection by monitoring the electrical connection state before actual tampering occurs. The friable electrical connection element is pre-configured to break under specific tamper conditions, and the RFID tag continuously monitors this state, enabling detection before full compromise occurs.
Solution Approach 2:
The patent introduces a friable electrical connection element as an intermediary between the tamper event and the RFID tag. This intermediary component translates physical tamper events into electrical signal changes that the passive RFID tag can detect and communicate, bridging the gap between mechanical tampering and electronic detection.
3Device complexity
If manual inspection of tamper evident seals is performed, then simplicity is maintained, but productivity and reliability for large quantities deteriorate
Solution Approach 1:
The patent replaces manual mechanical inspection with an automated electromagnetic field-based detection system. The RFID reader uses RF waves to communicate with tags, automatically detecting tamper status without human intervention. This substitution enables rapid screening of large quantities of items while maintaining simplicity in the tag design.
4Measurement precision
If RFID tags with logic circuits are added to detect container opening, then detection accuracy is improved, but device complexity and manufacturing cost increase
Solution Approach 1:
The patent extracts the complex logic circuitry from the RFID tag by using a simpler passive detection approach. Instead of processing complex signals internally, the tag monitors basic electrical connection state changes and communicates these directly, reducing on-chip complexity while maintaining detection accuracy through the friable connection mechanism.
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
Enables remote and automatic tamper detection, improving product safety by reducing human error and maintaining container integrity checks, while being cost-effective and suitable for sensitive products.
Implementation Method 1
these devices possess an antenna that captures the power from an incoming radio-frequency (RF) scan (in the form of a minute electrical current induced in the antenna)
Data Source
AI summary
The present invention relates to a system and method of tamper detection. A tamper detection system in accordance with an embodiment of the present invention includes: a passive electronic sensor including a circuit having first, second, and third nodes; a load connected between the first and second nodes of the circuit; a friable electrical connection element connected between the second and third nodes of the circuit; and a storage unit, connected to the second node of the circuit, for storing an identification code of the sensor; wherein in use a voltage is applied across the first and third nodes of the circuit, and when the friable electrical connection element is intact, the second node of the circuit is at a first voltage, and when the friable electrical connection element is broken, the second node of the circuit is at a second voltage.