RFID Tag Localization via Dynamic Signal Adjustment
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Solution Overview
Problem
Existing RFID-based object localization systems are limited in dynamic sensing reconfiguration and access control, failing to adapt to varying application demands and providing inadequate security measures.
Innovation Solution
A networked RFID system with software modules that utilize hierarchical threshold and probabilistic calculations, adjustable configuration settings, and semantic attribute determination to localize RFID tags, manage access, and enforce security through dynamic RF signal adjustments and mobile device authentication.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If RFID tag readers use fixed configuration settings, then system simplicity is maintained, but adaptability to varying application demands deteriorates
Solution Approach 1:
The patent implements dynamic configuration settings for RFID tag readers that can be adjusted based on application demands. The system allows real-time modification of RF signal strength, antenna gain, polarization, and orientation parameters, transforming a static system into a dynamic one that adapts to different sensing requirements and environmental conditions.
Solution Approach 2:
The system enables changing of physical parameters of the RFID readers including RF signal strength, antenna gain, antenna polarization, and antenna orientation. These parameter changes allow the system to optimize performance for different applications without requiring hardware modifications, resolving the contradiction between adaptability and complexity.
2Measurement precision
If RFID systems use basic location determination, then system complexity is reduced, but measurement precision deteriorates
Solution Approach 1:
The patent replaces traditional mechanical or geometric localization methods with signal-based probabilistic calculations. By using RF signal strength measurements and hierarchical threshold comparisons, the system achieves precise localization without complex mechanical positioning systems, substituting physical measurement mechanisms with electromagnetic field-based computation.
Solution Approach 2:
The system implements feedback through hierarchical threshold limit calculations that continuously compare measured RF signal characteristics against predefined thresholds. This feedback mechanism allows the system to iteratively refine localization accuracy by adjusting its interpretation of signal data based on accumulated readings and environmental factors.
3Adaptability or versatility
If access control rules are rigid, then security enforcement is strengthened, but adaptability to different time intervals and conditions deteriorates
Solution Approach 1:
The access control system dynamically adjusts authorization rules based on time intervals and environmental conditions. Rather than static access control, the system modifies its security parameters in response to changing conditions, allowing the same physical space to have different access requirements at different times while maintaining reliable security enforcement through programmed rules.
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 precise localization and dynamic access control, enhancing security by adapting to changing conditions and ensuring authorized access through advanced data aggregation and mobile authentication mechanisms.
Implementation Method 1
Systems and methods for object localization and path identification based on RFID sensing
Data Source
AI summary
A networked radio frequency identification system includes a plurality of radio frequency identification (RFID) tag readers, a computer in signal communication with the RFID tag readers over a network, and a software module for storage on and operable by the computer that localizes RFID tags based on information received from the RFID tag readers using a network model having endpoints and oriented links. In an additional example, at least one of the RFID tag readers includes an adjustable configuration setting selected from RF signal strength, antenna gain, antenna polarization, and antenna orientation. In a further aspect, the system localizes RFID tags based on hierarchical threshold limit calculations. In an additional aspect, the system controls a locking device associated with an access point based on localization of an authorized RFID tag at the access point and reception of additional authorizing information from an input device.