Switchable RFID Tag With Sliding Mechanism For Dynamic Occupancy Reporting
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Solution Overview
Problem
Existing RFID tags with a single code cannot accurately report a vehicle's occupancy status in real-time due to static regulations, as they do not dynamically change their classification based on the number of occupants.
Innovation Solution
A switchable RFID tag device with multiple RFID modules and a sliding mechanism that allows for coupling and decoupling with un-tuned antenna sections, enabling the tag to change its operational state and transmit different data strings representing various occupancy statuses (SOV, HOV, HOV3) based on the position of the modules relative to the antenna sections and shorting bars.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a single RFID module is used in the tag device, then the device complexity is reduced, but the adaptability to report different occupancy statuses is insufficient
Solution Approach 1:
The tag device is segmented into multiple RFID modules (first RFID module, second RFID module, third RFID module), each capable of being selectively coupled to the antenna sections. This segmentation allows the system to handle different occupancy statuses by activating only the necessary module, thereby improving adaptability while managing complexity through modular design.
Solution Approach 2:
Multiple RFID modules are integrated into a single tag device, each module capable of performing the same RFID function but with different data strings corresponding to different occupancy statuses (SOV, HOV, HOV3). This multi-functionality allows the tag to universally report any occupancy status by selecting the appropriate module.
2Adaptability or versatility
If multiple RFID modules are integrated into the tag device, then the adaptability to report different occupancy statuses is improved, but the device complexity increases
Solution Approach 1:
The tag device incorporates a sliding mechanism that dynamically reconfigures the coupling between RFID modules and antenna sections. By sliding the antenna sections to different positions, the system dynamically switches which RFID module is active, enabling adaptability without permanently complex wiring or switching circuits.
Solution Approach 2:
The sliding mechanism acts as an intermediary between the multiple RFID modules and the antenna sections. Instead of each module having direct complex connections to all antenna sections, the sliding mechanism mediates the coupling by physically positioning the antenna sections to connect with the desired module, simplifying the overall system architecture.
3Measurement precision
If the RFID tag uses a static code, then the device complexity is minimized, but the measurement precision of occupancy status reporting is insufficient
Solution Approach 1:
The tag device transitions from a static code configuration to a dynamic configuration where the active RFID module changes based on occupancy status. The sliding mechanism enables this dynamics by allowing the antenna sections to be physically repositioned to couple with different RFID modules, thereby achieving precise occupancy status reporting through dynamic module selection.
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 accurate and dynamic reporting of vehicle occupancy status, ensuring compliance with high-occupancy vehicle regulations by allowing the RFID tag to switch between different operational states and data transmission modes, thereby improving the accuracy of vehicle classification.
Implementation Method 1
a sliding mechanism configured to move between a first position and a second position
Implementation Method 2
RFID tags use electromagnetic fields to wirelessly transfer data
Data Source
AI summary
A switchable radio-frequency identification tag device. The device includes a first RFID module positioned on a first plane, at least one un-tuned antenna section positioned on a second plane, a shorting bar positioned on the second plane; and a sliding mechanism configured to move between a first position and a second position. The first plane is positioned parallel to the second plane. The first RFID module is coupled to the at least one un-tuned antenna section to form a tuned RFID tag in the first position. The first RFID module is coupled to the shorting bar in the second position.