Coded Magnetic Tags Encoding Information via Distinct Materials
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Solution Overview
Problem
Conventional electronic article surveillance (EAS) tags provide only binary detection, lacking the ability to convey information beyond presence or absence, limiting their functionality in retail and other applications.
Innovation Solution
A coded tag system utilizing multiple magnetic materials with distinct magnetic characteristics, encoded with different information, is detected using a magnetic detector system that transmits and receives signals at specific frequencies, allowing for the determination of encoded information based on unique responses from each material.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of information
If conventional EAS tags are used for detection, then the tag can be detected for security purposes, but only binary information (presence or absence) is available, limiting functionality
Solution Approach 1:
The tag is segmented into multiple magnetic materials with distinct magnetic characteristics, where each material or combination of materials encodes specific information. This segmentation allows the tag to convey multiple types of information simultaneously, transforming the binary detection system into a multi-information carrier system.
Solution Approach 2:
The invention changes the magnetic parameters of the tag by using materials with different coercive fields and saturation magnetizations. These parameter changes enable the tag to respond differently to various detection field strengths, allowing extraction of multiple information types from a single tag through parameter-based differentiation.
2Loss of information
If multiple magnetic materials with different characteristics are used in a single tag, then multiple types of information can be encoded, but the device complexity increases
Solution Approach 1:
Multiple magnetic materials are integrated into a single universal tag structure that can encode various types of information (security status, product identification, inventory data) simultaneously. This multi-functional approach allows one tag to replace what would traditionally require multiple separate tags or systems.
Solution Approach 2:
The tag uses composite magnetic material structures where different magnetic materials are combined in specific configurations. These composite structures provide distinct magnetic responses to detection fields of varying strengths, enabling information encoding without requiring complex electronic components or multiple separate tags.
3Measurement precision
If a magnetic detector system transmits multiple detection signals at different frequencies, then multiple magnetic materials can be detected, but the system complexity increases
Solution Approach 1:
The detector system uses periodic transmission of magnetic detection signals at different frequencies or field strengths. By periodically varying the detection parameters and analyzing the temporal response patterns of different magnetic materials, the system can differentiate between materials and decode information without requiring simultaneously complex multi-frequency transmission.
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 the encoding and detection of multiple types of information on a single tag, enhancing security, inventory management, and data analytics by providing a more sophisticated means of product identification and tracking.
Implementation Method 1
a first magnetic material having a first magnetic characteristic and encoding first information. The coded tag includes a second magnetic material associated with the substrate. The second magnetic material encodes second information and has a second magnetic characteristic that is different from the first magnetic characteristic
Implementation Method 2
The transmitter is configured to transmit a first magnetic detection signal at a first magnetic frequency. The transmitter is also configured to transmit a second magnetic detection signal at a second magnetic frequency
Data Source
AI summary
A method includes printing a first magnetic material onto a substrate. The first magnetic material has a first magnetic characteristic and encodes first information based on the first magnetic characteristic. The method further includes printing a second magnetic material onto the substrate. The second magnetic material encodes second information and has a second magnetic characteristic different from the first magnetic characteristic. The second information is encoded based on the second magnetic characteristic.