Eddy Current Component Authentication via Conductivity Patterns
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Solution Overview
Problem
The risk of counterfeit components in the aviation industry poses a threat to the integrity and safety of gas turbine engines, as well as the reputation and revenue of original equipment manufacturers (OEMs), due to the ease of reverse engineering and duplication of additively manufactured parts.
Innovation Solution
A method and system utilizing conductivity modifying agents integrated into the surface of additively manufactured components, which generate a unique eddy current response signature for authentication, allowing genuine parts to be distinguished from counterfeits through interrogation with an eddy current probe and comparison to a reference identifier stored in a database.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If additive manufacturing technologies are used to produce replacement parts, then manufacturing cost and accessibility are reduced, but the risk of counterfeit production and reverse engineering increases
Solution Approach 1:
The patent embeds conductivity modifying agents at specific locations within the component material to create localized regions with distinct electrical conductivity properties. These localized conductivity variations serve as unique authentication signatures that are difficult to replicate, thereby addressing the counterfeit risk while maintaining additive manufacturing accessibility.
Solution Approach 2:
The patent incorporates conductivity modifying agents (such as metallic particles, conductive polymers, or carbon-based materials) into the base material during the additive manufacturing process. This creates a composite material structure where the conductive elements are distributed within the matrix, providing embedded authentication features that are inherent to the component itself and difficult to reproduce by counterfeiters.
2Reliability
If conductivity modifying agents are embedded in the component, then authentication capability is improved, but manufacturing complexity increases
Solution Approach 1:
The patent combines the authentication feature integration with the additive manufacturing process itself, rather than adding a separate post-processing step. The conductivity modifying agents are deposited or embedded during the layer-by-layer construction process, merging the authentication feature creation with the component manufacturing into a single integrated operation.
Solution Approach 2:
The additive manufacturing process inherently provides the mechanism for embedding conductivity modifying agents through digital control of material deposition. The manufacturing system automatically places conductive elements at predetermined locations based on digital models, eliminating the need for manual intervention or complex external equipment to create authentication features.
3Reliability
If embedded identifiers are used for authentication, then counterfeit prevention is improved, but detection difficulty increases due to the need for specialized interrogation equipment
Solution Approach 1:
The patent replaces visual or tactile identification methods with electrical conductivity-based authentication. Instead of using surface markings, labels, or physical features that can be easily copied, the system uses embedded conductivity patterns that require electrical interrogation (eddy current testing) to detect, thereby substituting a more sophisticated detection method that is inherently more difficult to replicate.
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
Effectively authenticates components by providing a robust and difficult-to-reproduce identifier, reducing the risk of counterfeit parts and maintaining the integrity and quality of OEM products, while being integrated into the manufacturing process without additional costs.
Implementation Method 1
obtaining data indicative of a component identifier by interrogating an identifying region of the surface with an eddy current probe, wherein the conductivity modifying agent is selectively positioned within the identifying region of the surface such that the interrogation of the identifying region results in an eddy current response signature that defines the component identifier of the component
Data Source
AI summary
A system and method for manufacturing and authenticating a component is provided. The method includes forming a component having an identifying region that contains two or more materials having different conductivities such that the identifying region generates an eddy current response signature that defines a component identifier of the component. The method further includes interrogating the identifying region of the surface with an eddy current probe to determine the component identifier. The component identifier may be stored in a database as a reference identifier and may be used for authenticating components.