External Field Response Visualization for Internal Magnetic Domain Imaging
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing devices are unable to accurately obtain the state of magnetic domains at depths deeper than the surface of a sample, specifically failing to visualize the magnetic susceptibility distribution inside an object.
Innovation Solution
An external field response distribution visualization device that includes an induction circuit to induce a field component, a sensor to sense the field strength, and an information processing circuit to generate an image of the external field response distribution within an object by calculating an induction position dependent field function and imaging function based on sensing results.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If magnetic force measurement is performed only at the surface level, then surface magnetic domains can be obtained with high accuracy, but magnetic domains at depths deeper than the surface cannot be obtained
Solution Approach 1:
The invention transitions from two-dimensional surface measurement to three-dimensional internal measurement by introducing depth positioning capability. The measurement plane is extended into the third dimension (depth) through mathematical processing of magnetic force measurements taken at different heights above the sample surface, enabling visualization of magnetic domains at various depths within the sample.
Solution Approach 2:
The invention introduces an intermediary computational process (three-dimensional field calculation based on Laplace equation) that mediates between the measured magnetic force data and the desired internal magnetic domain visualization. This mathematical intermediary enables the extraction of internal field information from surface measurements.
2Measurement precision
If only surface magnetic domains are visualized, then high measurement accuracy is achieved, but internal magnetic susceptibility distribution remains undetectable
Solution Approach 1:
The invention performs preliminary three-dimensional field calculation and magnetic susceptibility distribution computation before final image generation. By pre-processing the magnetic force measurements through mathematical models (Laplace equation solutions), the system prepares internal field information in advance, enabling subsequent visualization of internal magnetic domains without compromising surface measurement accuracy.
Solution Approach 2:
The invention replaces direct physical measurement of internal magnetic domains with a computational field-based approach. Instead of physically accessing internal regions, the system uses mathematical substitution to calculate internal field distributions from external measurements, thereby recovering internal magnetic susceptibility information that would otherwise be inaccessible.
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 generation of accurate images showing the external field response distribution within an object, overcoming the limitations of existing technologies that only capture surface information.
Implementation Method 1
an induction circuit that induces a first field component from each of induction positions defined outside of an object
Implementation Method 2
a sensor that senses, at each of sensing positions defined outside of the object as positions relative to the object, a strength of a field including a second field component induced from the object by the first field component
Data Source
AI summary
An external field response distribution visualization device includes: an induction circuit that induces a first field component from each of induction positions; a sensor that senses a field strength at sensing positions for each of the induction positions; and an information processing circuit that generates an image showing an external field response distribution. The information processing circuit: calculates, using the sensing result as a boundary condition, an induction position dependent field function that takes an induction and sensing positions as inputs and outputs the field strength; calculates an imaging function that takes an imaging target position as an input and outputs an image intensity, and is defined based on the strength output from the induction position dependent field function in response to inputting the imaging target position; and generates the image based on the imaging function.