Thread RFID Tag Programming via Differential Electric Field Coupling
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Solution Overview
Problem
Existing RFID testing and programming systems are not well-suited for thread-type RFID tags due to their linear sequence and lack of compatibility with thread lengths, which hinders effective testing and programming.
Innovation Solution
The implementation of a method and system that uses differential electric fields applied between couplers positioned on opposite sides of the RFID chip, allowing relative movement of the thread-type RFID tag and path, enabling effective testing and programming by coupling with the RFID reader.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If prior RFID testing systems use standard couplers designed for flat structures (rolls of labels, cut tickets), then those systems can effectively test flat RFID devices, but they are not well-suited for thread-type RFID tags which have a linear sequence along a thread length
Solution Approach 1:
Instead of bending the thread to fit a flat coupler, the invention inverts the approach by creating a coupler that conforms to the thread's linear geometry. The coupler is designed with a path that follows the thread length, with coupling points positioned along this path, allowing the testing system to adapt to the thread-type tag's natural configuration rather than forcing the tag into a flat structure format
Solution Approach 2:
The invention transitions from a two-dimensional flat coupler design to a three-dimensional path-based configuration that accommodates the linear sequence of thread-type RFID tags. The coupler incorporates a path extending in one dimension (along the thread length) with coupling points distributed along this path, enabling effective coupling with tags arranged in a linear sequence rather than a flat plane
2Reliability
If thread-type RFID tags are tested using prior systems, then the RFID chip can be accessed, but proper coupling and interaction with the RFID reader cannot be achieved due to the linear sequence and lack of compatibility with thread lengths
Solution Approach 1:
The invention introduces a path as an intermediary element between the coupling points and the thread-type RFID tag. This path serves as a mediator that guides the coupling points along the linear sequence of the thread, enabling effective electromagnetic coupling with the RFID chip while maintaining ease of operation. The path acts as a bridge that translates the linear thread configuration into a format compatible with RFID reader interaction
Solution Approach 2:
The coupler is designed with multi-functionality to handle thread-type RFID tags of varying lengths and configurations. The path-based structure with multiple coupling points allows the same coupler design to effectively test tags regardless of their specific length or antenna configuration, providing a universal solution that simplifies the testing process across different thread-type tag variants
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
This approach allows for successful testing and programming of thread-type RFID tags by ensuring proper coupling and interaction with the RFID reader, overcoming the limitations of traditional systems designed for flat structures.
Implementation Method 1
a differential electric field is applied between the first coupler and the second coupler and across the RFID chip whereby the RFID reader couples to the RFID chip
Implementation Method 2
Wire has long been used as RFID antenna material. Depending on the nature of the wire it can exhibit characteristics of strength, flexibility, and being a good conductor of radio frequency ('RF') energy
Data Source
AI summary
Methods and systems are provided for testing and/or programming a thread-type string of RFID tags or devices. A thread-type RFID tag is formed on a length or thread having an RFID chip, a first antenna section and a second antenna section, the first and second antenna sections being positioned on the length of thread on opposite sides of the RFID chip. An RFID reader is positioned in electronic communication with a first coupler and a second coupler lying along a path, and the RFID tag and couplers are in relative motion with respect to each other such that the first and second couplers are on opposite sides of the RFID chip. A differential electric field is applied between the first coupler and the second coupler and across the RFID chip whereby the RFID reader couples to the RFID chip and interacts with the RFID tag to carry out testing and/or programming tasks with respect to the RFID tag.