Security Element Magnetic Coding Adjacency
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Solution Overview
Problem
Existing magnetic security elements on value documents, such as banknotes and identification cards, face difficulties in reliably detecting differently coercive magnetic areas when the security element is transported parallel to the magnetic coding due to overlapping magnetization stages, which conventional magnetic sensors struggle to differentiate effectively.
Innovation Solution
A security element with a magnetic coding that includes alternating first and second coding elements, where the first coding element has a continuous magnetic area with a specific coercive field strength and the second coding element consists of a gap area and another magnetic area with a different coercive field strength, arranged in a predetermined direction to ensure constructive interference of magnetic signals, enhancing detection accuracy.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If differently coercive magnetic areas are spaced apart by non-magnetic material, then the magnetic coding can be formed with distinct coercive regions, but additional magnetization stages and overlapping magnetic signals are added when transported parallel to the coding, making differentiation difficult with conventional magnetic sensors
Solution Approach 1:
The patent removes the non-magnetic gap areas between differently coercive magnetic areas, extracting the problematic element that caused overlapping signals. By eliminating these gaps, the magnetic areas become directly adjacent, preventing the formation of additional magnetization stages and allowing conventional magnetic sensors to clearly differentiate between differently coercive regions during parallel transport.
Solution Approach 2:
The patent merges adjacent magnetic areas with different coercive strengths by removing the non-magnetic material between them. This combining creates a continuous magnetic structure where differently coercive areas are directly adjacent, eliminating the signal overlap problem that occurred when gaps were present and enabling reliable detection with conventional sensors.
2Difficulty of detecting and measuring
If magnetic areas are made continuous without gap areas, then fewer magnetization stages are created, but it becomes difficult to form distinct coding elements with different coercive field strengths
Solution Approach 1:
The patent applies local quality by creating regions with different coercive field strengths at specific locations within the continuous magnetic structure. Each local region has tailored magnetic properties (different coercivity) while maintaining overall continuity, allowing distinct coding elements to be formed without introducing non-magnetic gaps that would create detection problems.
3Measurement precision
If the sum of lengths of differently coercive magnetic areas is limited to maximum 8 mm, then the magnetic signal amplitude is increased for better detection, but the coding capacity and information storage are reduced
Solution Approach 1:
The patent changes the parameter of magnetic area length to a maximum of 8 mm sum for differently coercive areas. This parameter optimization increases magnetic signal amplitude for better detection precision while the coding capacity is maintained through the use of multiple coding elements with different coercive field strengths arranged in sequences, allowing information to be encoded in the pattern rather than just the length.
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 configuration allows for reliable detection of magnetic codings even when the security element is transported parallel to the coding, resulting in increased maximum amplitude of magnetic signals, improving the differentiation between coercive areas and enhancing security feature verification.
Implementation Method 1
The first magnetic area has a first coercive field strength throughout the predetermined direction, the second magnetic area has a second coercive field strength which differs from the first coercive field strength
Implementation Method 2
the lengths of the first and second magnetic areas are selected such that the sum of the lengths of the first and second magnetic areas along the predetermined direction is a maximum of 8 mm
Data Source
Figure 1~2c
Figure 3a~3b
Figure 4
AI summary
The invention relates to a security element for securing documents of value. An extract of a magnetic encoding having first and second encoding elements is disposed along the security element. The encoding elements are disposed along a prescribed direction, the first encoding element along the prescribed direction continuously having a first magnetic region having a first coercive field strength and the second encoding element having at least one gap region and a second magnetic region having a second coercive field strength. At least one of the first magnetic regions is disposed immediately adjacent to at least one of the second magnetic regions. The sum of the lengths of the directly adjacent first and second magnetic regions is no greater than 8 mm.