Person-Centric RFID Tag Activation via Skin Proximity
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Solution Overview
Problem
RFID tag collisions due to multiple tags responding to interrogation signals lead to interference and incorrect data interpretation by readers, increasing complexity and cost, and RFID tags are often active before being usefully deployed, consuming power without providing meaningful data.
Innovation Solution
Implementing on-demand and person-centric activation mechanisms for RFID tags, where tags are inactive until manually or automatically activated, such as by skin contact, to reduce unnecessary responses and power consumption, using disable tabs or skin proximity to enable responses only when necessary.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If multiple RFID tags are activated and respond to interrogation signals, then more data can be collected, but signal interference and reading accuracy deteriorate
Solution Approach 1:
The patent implements periodic activation of RFID tags based on temporal patterns. Tags are activated only during specific time windows when they are needed, rather than continuously. This temporal scheduling reduces the number of simultaneously active tags, minimizing signal collisions and improving reading accuracy while still enabling collection from multiple tags over time.
Solution Approach 2:
The patent introduces dynamic activation states for RFID tags, where tags can switch between active and inactive states based on current system conditions. This dynamic control allows the system to adjust the number of active tags in real-time, optimizing the balance between data collection quantity and reading accuracy by activating only the necessary subset of tags during each interrogation cycle.
2Loss of information
If RFID tags remain continuously active, then data availability is improved, but power consumption increases
Solution Approach 1:
The patent implements periodic activation of RFID tags based on temporal patterns. Tags are activated only during specific time windows when they are needed, rather than continuously. This temporal scheduling reduces the number of simultaneously active tags, minimizing signal collisions and improving reading accuracy while still enabling collection from multiple tags over time.
Solution Approach 2:
The patent enables RFID tags to autonomously manage their own activation states based on pre-programmed criteria or received commands. Tags can self-activate during designated time windows and self-deactivate afterward, reducing the need for continuous reader control and optimizing power consumption while maintaining data availability when needed.
3Ease of operation
If RFID tags are activated before deployment, then readiness is improved, but unnecessary power consumption and interference occur
Solution Approach 1:
The patent prepares RFID tags for future activation by pre-programming them with activation criteria, time windows, or identification codes during manufacturing or deployment. This preliminary configuration enables rapid activation when needed without requiring continuous power or pre-activation, balancing readiness with power conservation by preparing tags in advance rather than keeping them continuously active.
Data Source
AI summary
In embodiments of person-centric RFID tag activation, an RFID tag is configured so as to be active or inactive based on proximity to a person. An RFID tag includes an integrated circuit (IC), an antenna coupled to the IC, and skin proximity activation circuitry. For example embodiments, the skin proximity activation circuitry is configured to establish an active state for the RFID tag if proximate to skin and an inactive state if not proximate to skin. For an example implementation, an RFID tag is placed in an operationally active state in which an interrogation signal is detectable by an IC if at least one skin contact point is touching skin. For another example implementation, an RFID tag is placed in a communicatively active state in which a received interrogation signal may trigger the sending of a response signal if a detected temperature comports with a human-appropriate range of temperatures.