Nondestructive Material Condition Monitoring via Electromagnetic Sensing
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Current nondestructive characterization techniques for materials are inadequate for monitoring hidden or buried states such as temperature, stress, and damage in materials, particularly in complex geometries and multi-layer systems, as they are either destructive, slow, or not cost-effective, limiting their ability to provide real-time health monitoring and process control.
Innovation Solution
A nondestructive condition monitoring method using sensors to assess material states through precomputed databases and models, allowing for control decisions to be made based on sensor responses, which can be applied to various processes like heat treatment or fuel cell operations, enabling the monitoring of hidden layers and interfaces without direct surface access.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If standard characterization techniques (microstructural analysis, electrochemical characterization) are used to assess material conditions, then comprehensive information about material features can be obtained, but the process is destructive and slow (7-10 days to complete)
Solution Approach 1:
The patent replaces destructive mechanical characterization methods (sectioning, mounting, polishing, microscopy) with nondestructive electromagnetic sensing methods. Sensors detect electromagnetic responses from the material to infer internal conditions such as temperature, stress, and material properties without physical contact or destruction of the sample.
Solution Approach 2:
The patent introduces electromagnetic fields as an intermediary between the sensor and the material's internal state. The electromagnetic field penetrates the material and interacts with its electromagnetic properties (conductivity, permeability), allowing indirect measurement of hidden conditions without direct physical access to the interior.
2Measurement precision
If destructive evaluation methods are used to ensure material quality, then accurate material condition data can be obtained, but the material is damaged or destroyed in the process
Solution Approach 1:
The patent replaces destructive mechanical evaluation methods with nondestructive electromagnetic sensing. The electromagnetic sensor detects material properties and internal conditions through electromagnetic interactions without physical contact, sectioning, or destruction of the material sample.
Solution Approach 2:
The material's own electromagnetic properties (electrical conductivity, magnetic permeability) serve as the sensing mechanism. These intrinsic properties naturally respond to internal conditions (temperature, stress, composition) and can be detected remotely without external intervention that would damage the material.
3Reliability
If sensors are embedded in materials to monitor hidden states, then real-time monitoring capability is improved, but device complexity and space requirements increase
Solution Approach 1:
The patent uses electromagnetic fields as an intermediary to access hidden material states without embedding physical sensors within the material. The electromagnetic field penetrates the material and carries information about internal conditions to external sensors, eliminating the need for complex embedded sensor systems.
Solution Approach 2:
The electromagnetic sensor can monitor multiple material parameters (temperature, stress, conductivity, permeability) simultaneously through a single measurement system. This multi-functional capability reduces overall system complexity compared to embedding separate sensors for each parameter.
4Ease of manufacture
If batch mode processing with preset schedules is used for manufacturing, then process simplicity is maintained, but the ability to monitor and control hidden material states in real-time is lost
Solution Approach 1:
The patent implements feedback control by continuously monitoring material states during processing using electromagnetic sensors. The real-time measurement data feeds back to the control system, enabling dynamic adjustment of processing parameters to maintain desired material conditions and prevent defects.
Solution Approach 2:
The patent enables continuous monitoring of material states throughout the processing operation rather than relying on intermittent post-process inspection. The electromagnetic sensing operates continuously during processing, providing uninterrupted information about material condition evolution.
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 real-time monitoring and control of material states, preventing damage and extending the life of components by providing accurate data on temperature, stress, and bond integrity, thus reducing maintenance costs and improving material health assessment.
Implementation Method 1
Each of these includes detection of electromagnetic property changes associated with either microstructural and/or compositional changes, or electronic structure (e.g., Fermi surface) or magnetic structure (e.g., domain orientation) changes.
Data Source
AI summary
The condition of internal or hidden material layers or interfaces is monitored and used for control of a process that changes a condition of a material system. The material system has multiple component materials, such as layers or embedded constituents, or can be represented with multiple layers to model spatial distributions in the material properties. The material condition changes as a result of a process performed on the material, such as by cold working, or from functional operation. Sensors placed proximate to the test material surface or embedded between material layers are used to monitor a material property using magnetic, electric, or thermal interrogation fields. The sensor responses are converted into states of the material condition, such as temperature or residual stress, typically with a precomputed database of sensor responses. The sensor responses can also be used to determine properties of the test material, such as electrical conductivity or magnetic permeability, prior to conversion to the material state. The states are used to support control decisions that control the process or operation causing the material condition to change.