Electromagnetic Resonant Coupling for Direct Ink Write Monitoring
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Solution Overview
Problem
In direct ink writing (DIW) additive manufacturing, it is challenging to precisely control and monitor the composition of micro-scale structures due to inherent difficulties in assessing physical properties and the impact of minute changes in material delivery systems and ambient conditions.
Innovation Solution
The implementation of an electromagnetic resonant coupling apparatus that introduces electromagnetic energy into the material flow path, allowing for real-time monitoring and control of the feedstock composition by sensing changes in permeability and permittivity properties, using inductive coils or capacitors and RF electronics to provide feedback for adjusting the material composition during the manufacturing process.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If traditional monitoring methods are used for feedstock composition, then the system remains simple, but measurement precision and real-time control capability deteriorate
Solution Approach 1:
The patent replaces traditional mechanical or physical sampling monitoring methods with electromagnetic field-based sensing. The electromagnetic resonant coupling system uses electromagnetic fields to detect changes in feedstock composition in real-time, eliminating the need for complex mechanical sampling and laboratory analysis equipment while achieving high measurement precision.
Solution Approach 2:
The patent introduces an electromagnetic field as an intermediary between the feedstock material and the sensing system. The electromagnetic field couples with the dielectric properties of the feedstock, allowing non-contact, real-time monitoring of composition changes without physically disturbing the material flow or requiring direct contact sensors.
2Manufacturing precision
If real-time monitoring of micro-scale structures is implemented, then manufacturing precision improves, but difficulty of detecting and measuring increases
Solution Approach 1:
The patent replaces direct physical measurement methods with electromagnetic sensing. For micro-scale structures where physical property assessment is difficult, the system uses electromagnetic fields that can penetrate and interact with the material without requiring physical contact or complex measurement probes, thereby reducing measurement difficulty while maintaining manufacturing precision.
Solution Approach 2:
The patent monitors changes in dielectric properties (permittivity and loss tangent) of the feedstock material as key parameters. By tracking these electromagnetic parameter changes in real-time, the system can detect composition variations in micro-scale structures without needing to directly measure difficult physical properties like viscosity or particle distribution.
3Measurement precision
If electromagnetic resonant coupling is used for monitoring, then measurement precision and real-time control improve, but device complexity increases
Solution Approach 1:
The patent designs the electromagnetic resonant coupling system to serve multiple functions: it simultaneously monitors feedstock composition, detects material property changes, and provides real-time feedback for process control. This multi-functionality consolidates what would otherwise require separate monitoring and control systems, reducing overall device complexity despite the advanced sensing technology.
Solution Approach 2:
The patent implements a closed-loop feedback system where the electromagnetic resonant coupling sensors provide real-time composition data that automatically adjusts processing parameters. This feedback mechanism enables precise measurement and control while simplifying the operational complexity by automating the control decisions based on sensor readings.
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 enables accurate, real-time monitoring and control of the feedstock composition, ensuring the quality of the manufactured product by detecting changes in the upstream material delivery system and compensating for them, thereby improving precision in forming micro-scale structures.
Implementation Method 1
In situ monitoring of direct ink write process using electromagnetic resonant coupling
Implementation Method 2
introducing electromagnetic energy into the material flow path thereby producing an electromagnetic field condition within the material flow path
Implementation Method 3
the electromagnetic field condition is responsive to at least one of the permeability and permittivity properties of a space within the material flow path
Data Source
AI summary
In the additive manufacturing process, a monitored or controlled mixture of materials is deposited to form an additive manufactured product by delivering the mixture of materials through a material flow path while using an excitation source to introduce electromagnetic energy into the material flow path using a circuit element having inductive or capacitive reactance disposed adjacent the material ejecting orifice. The excitation source produces an electromagnetic field condition within the material flow path that is responsive to at least one of the permeability and permittivity properties of a space within the material flow path. A sensing means coupled electrically or magnetically to the excitation means is responsive to the electromagnetic field condition and provides at least one control parameter based on the electromagnetic field condition that may be used to control the composition of the mixture of materials by adjusting proportions of constituent materials.