Self-Locking Security Seal with Segmented RFID Tags
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing self-locking security seals with RFID technology lack clarity in indicating tampering conditions, as the absence of RFID signals can be due to malfunction rather than actual tampering, leading to vagueness in determining the seal's state.
Innovation Solution
A self-locking security seal with enhanced RFID detection using two-gate RFID tags and frangible electrical connections, coupled with locking mechanisms that ensure clear signaling of the seal's state through specific logic signals (EPC+Open/Close and EPC+Tampering bits), preventing false indications and ensuring tampering is apparent.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Extent of automation
If RFID detection is used to monitor seal state, then remote signaling capability is improved, but measurement precision deteriorates because absence of signal cannot distinguish between tampering and malfunction
Solution Approach 1:
The seal system is segmented into multiple independent RFID tags (first tag on safety means, second tag on locking device) that can be individually activated. This segmentation allows the system to distinguish between different states (open, closed, tampered) by checking which specific tag is active, thereby improving measurement precision while maintaining automated remote signaling.
Solution Approach 2:
The patent introduces an intermediary logical system that processes RFID signals and interprets their meaning. The control unit analyzes the presence/absence of signals from multiple tags and translates this into definitive state determination (open/closed/tampered), resolving the ambiguity between signal absence due to tampering versus malfunction.
2Device complexity
If simple RFID tags are used for detection, then device complexity is reduced, but loss of information increases due to ambiguous signal interpretation
Solution Approach 1:
The system transitions from a single-dimension RFID detection (one tag, one signal state) to a multi-dimensional detection system. By deploying multiple RFID tags at different locations (safety means, locking device) with different activation conditions, the system creates additional informational dimensions that enable precise state determination without increasing individual tag complexity.
Data Source
AI summary
The present invention relates to a self-locking security seal of the type mostly used within the scope of transporting goods, for the secure closure of containers or the like.