Magnetic Field Vector Imaging Array Using Orthogonal Hall-Effect Sensors
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Solution Overview
Problem
Current techniques for imaging magnetic fields require relative motion between the field and a sensor, resulting in scalar representations of magnetic field magnitude rather than true vector images of three-dimensional magnetic fields.
Innovation Solution
A magnetic field vector imaging array system using an N×N array of orthogonally aligned Hall-Effect devices that image magnetic fields as full two- or three-dimensional vector fields, allowing for static magnetic field imaging without relative motion and displaying fields as vector arrays with magnitude and direction, or scalar images calculated from vector components.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If relative motion between field and sensor is used to build up magnetic field images, then magnetic field magnitude can be measured, but only scalar representations are obtained instead of true vector images of three-dimensional magnetic fields
Solution Approach 1:
The system divides the magnetic field measurement task into multiple independent sensor elements arranged in an N×N array. Each sensor element measures local magnetic field components, and the complete three-dimensional vector field is reconstructed by combining measurements from all segmented sensors, enabling full vector imaging without requiring relative motion between the field and a single sensor.
Solution Approach 2:
The patent transitions from single-point scalar measurements to multi-point vector measurements by adding spatial dimensionality through an N×N sensor array. Each sensor element in the array simultaneously measures multiple vector components, transforming the measurement from one-dimensional (scalar magnitude) to three-dimensional (full vector field with magnitude and direction at each point).
2Measurement precision
If an array of single Hall-Effect devices is used, then scalar image of field components can be produced, but true scalar image of the three dimensional magnetic field cannot be obtained
Solution Approach 1:
The system merges multiple Hall-Effect sensor elements into a coordinated N×N array configuration, where each sensor contributes measurements of specific vector components. By combining the outputs from all sensors in the array through signal processing, the system achieves complete three-dimensional magnetic field imaging capability that exceeds what any single sensor can provide.
Solution Approach 2:
Each Hall-Effect sensor element in the array is designed to measure multiple magnetic field vector components (Bx, By, Bz) simultaneously. This multi-functional capability of each sensor element, combined with the array configuration, enables the system to capture the complete three-dimensional magnetic field vector at multiple spatial points, providing universal measurement capability for various magnetic field imaging applications.
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 visualization of magnetic fields as vector arrays in two and three dimensions, allowing for real-time imaging of current flows and static magnetic fields, improving the understanding and visualization of magnetic field concepts.
Implementation Method 1
an N×N array of orthogonally aligned Hall-Effect devices
Data Source
AI summary
Methods and systems for imaging a magnetic field as vectors (or scalars if desired) in either two or three dimensions without the need for rastering or relative motion between the sensors and the magnetic field being viewed. A secondary function is to image electric current flow as vectors. Example embodiments can be scaled to fit both large and small applications by using discreet devices or manufacturing with MEMS technologies.