RFID Blister Pack Network for Tamper Detection

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Solution Overview

Problem

Blister packs in the pharmaceutical industry face challenges with tampering and counterfeiting, necessitating improved methods for detection and prevention, as well as chain of custody tracking.

Innovation Solution

Integration of an RFID-based system within blister packs, featuring a network of chips and conductors on the sealing sheet or base that respond to RF interrogation signals, providing an indication of network integrity, which is compromised upon tampering, allowing for real-time monitoring of pack integrity.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If traditional blister packs are used without RFID technology, then manufacturing simplicity is maintained, but security against tampering and counterfeiting is insufficient

Engineering Contradiction:

Improvesecurity against tampering and counterfeitingVSAvoidcomplexity of RFID network integration

Core Design Contradiction:

ReliabilityVSDevice complexity

Solution Approach 1:

The RFID system is segmented into multiple discrete chips distributed across the blister pack, with each chip associated with specific cavities or products. This segmentation allows the security system to be scalable and adaptable to different pack configurations while maintaining manufacturing feasibility through modular integration

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The RFID network serves multiple functions simultaneously: it provides tamper detection through network integrity monitoring, enables counterfeiting prevention via unique chip identification, and facilitates chain of custody tracking through centralized database communication. This multi-functionality justifies the added complexity by delivering comprehensive security solutions

Inventive Principle:

Principle #6Universality (Multi-functionality)

2Measurement precision

If RFID chips are placed adjacent to every product, then product-level tracking precision is improved, but manufacturing complexity and cost increase

Engineering Contradiction:

Improveproduct-level tracking precisionVSAvoidnumber of chips and network configuration

Core Design Contradiction:

Measurement precisionVSDevice complexity

Solution Approach 1:

The patent implements local quality by placing RFID chips at specific strategic locations within the blister pack rather than uniformly across all products. Chips are positioned adjacent to certain cavities or products based on security priorities, allowing high-value or high-risk items to have individual tracking while reducing overall system complexity

Inventive Principle:

Principle #3Local quality

Solution Approach 2:

The system allows partial product-level tracking where not every single product requires an adjacent chip. Instead, a representative subset of chips provides sufficient tracking precision for the application, balancing security needs with manufacturing constraints through selective rather than universal implementation

Inventive Principle:

Principle #16Partial or excessive action

3Reliability

If the RFID network is made highly sensitive to detect all tampering, then detection capability is improved, but false alarm rate increases

Engineering Contradiction:

Improvetamper detection capabilityVSAvoidfalse positive indications of tampering

Core Design Contradiction:

ReliabilityVSLoss of information

Solution Approach 1:

The RFID network incorporates feedback mechanisms where chips communicate network integrity status to a centralized reader or database. This feedback system allows for verification of tamper indications, enabling the system to distinguish between actual tampering events and false positives caused by environmental factors or manufacturing variations

Inventive Principle:

Principle #23Feedback

Solution Approach 2:

The system establishes baseline network integrity parameters during manufacturing before the product enters circulation. These pre-established baselines serve as reference points for later tamper detection, allowing the system to recognize genuine tampering while filtering out normal variations that would otherwise trigger false alarms

Inventive Principle:

Principle #10Preliminary action

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 RFID system effectively detects tampering and counterfeiting by ensuring the network remains intact, providing a secure and reliable method for tracking the chain of custody and ensuring product authenticity.

Implementation Method 1

a network structured to receive one or more RF interrogation signals from a reader device and including a plurality of chips

Methodology Applied

Scientific EffectRFID (Radio Frequency Identification): Electromagnetic Induction

Data Source

PatentUS8091790B2Security for blister packs

Publication Date: 2012.01.10 UNIV OF PITTSBURGH OF THE COMMONWEALTH SYST OF HIGHER EDUCATION

AI summary

Various RFID based blister pack embodiments are provided for improving the ability to detect and prevent tampering and counterfeiting of blister packs and/or facilitating the chain of custody tracking of blister packs during manufacture. Some embodiments employ an RFID chip network on the blister pack and some embodiments employ an RFID strap network on the blister pack, wherein the integrity of the network (or lack thereof) is used to indicate the possibility of tampering. Other embodiments determine the possibility of tampering based on the frequency of an RF signal that is received from a chip provided on the blister pack, which will vary depending on whether the associated antenna has been detuned as a result of some type of tampering.