Passive RFID Tag with Switchable Reflective State for Event Detection
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Solution Overview
Problem
Current systems for detecting events in inventory or retail venues using passive RFID tags are bulky, difficult to configure, and expensive, making them unsuitable for compact and cost-effective event detection and alerting.
Innovation Solution
A system that uses a passive RF target with a switchable reflective state to indicate events, where the RF target changes its reflective state in response to user interaction, allowing an RFID reader to detect changes and trigger actions based on the received RF signal, enabling compact, inexpensive, and easy configuration for event detection.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If additional infrastructure is used to detect events in inventory or retail venues, then event detection capability is improved, but system complexity and cost increase
Solution Approach 1:
The passive RFID tag is designed to perform multiple functions: it identifies inventory items through its unique identifier while also detecting events through its switchable reflective state. This multi-functionality eliminates the need for separate event detection infrastructure, resolving the contradiction between event detection capability and system complexity
Solution Approach 2:
The patent combines inventory identification and event detection functions into a single passive RFID tag system. The tag integrates both capabilities by using its existing RF communication infrastructure to convey event information through reflective state changes, thereby improving event detection without adding separate complex infrastructure
2Reliability
If additional infrastructure is deployed for event detection, then event detection capability is improved, but system cost increases
Solution Approach 1:
The passive RFID tag serves dual purposes as both an inventory identifier and an event detector. By utilizing the tag's existing components and adding only a simple switch mechanism, the system achieves event detection capability without requiring expensive additional infrastructure, thus resolving the contradiction between detection capability and system cost
Solution Approach 2:
The passive RFID tag detects events autonomously by changing its own reflective state in response to environmental changes or user interaction. This self-service capability eliminates the need for expensive external detection infrastructure, allowing the tag to perform event detection using its own resources
3Reliability
If complex infrastructure is used for event detection, then event detection capability is improved, but ease of configuration deteriorates
Solution Approach 1:
The passive RFID tag integrates inventory identification and event detection in a single device that requires no separate configuration. The tag automatically detects events through its switchable reflective state and communicates them to the reader, eliminating the need for complex infrastructure configuration and resolving the contradiction between detection capability and ease of configuration
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 efficient detection of events such as stock levels or assistance requests within monitored areas, allowing for timely notifications and actions without the need for extensive infrastructure, improving operational efficiency and reducing costs.
Implementation Method 1
a passive RF target with a switchable reflective state to indicate events, where the RF target changes its reflective state in response to user interaction, allowing an RFID reader to detect changes and trigger actions based on the received RF signal
Data Source
AI summary
Systems and methods for detecting an event within a monitored area are provided. A transmitter emits an RF interrogation signal into the monitored area. An RF target positioned within the monitored area reflects the interrogation signal as a target signal when the interrogation signal impinges on the RF target. The RF target has a switch actuatable by a user between a switch-state in which the RF target operates in a first reflective state, and a switch-state in which the RF target operates in a second reflective state. A receiver receives the target signal from the RF target. Based on the target signal received by the receiver, a processor can detect an indication of the reflective state in which the RF target is operating. The processor triggers an action in response to the indication of the reflective state in which the RF target is operating.