Magnetic Sensor With Opposing Collecting Surfaces For Distant Weak Field Detection
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Solution Overview
Problem
Conventional magnetic sensors require close proximity to a magnetic field source to detect weak magnetic fields, making it difficult to detect magnetic fields from a distance.
Innovation Solution
A magnetic sensor design featuring first and second magnetic bodies with opposing magnetic collecting surfaces and a magnetic detecting part that allows magnetic flux to pass between them, enabling efficient detection of magnetic fields at a distance by enhancing magnetic collection efficiency through adjustable magnetic collecting parts.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a single bar-like magnetic body is used to collect magnetic field, then magnetic collection efficiency is improved, but the sensor must be positioned close to the magnetic field source
Solution Approach 1:
The magnetic collection system is divided into two separate magnetic bodies (first and second magnetic bodies) with opposing magnetic collecting surfaces. This segmentation allows the sensor to detect magnetic fields from a greater distance by collecting flux from both sides simultaneously, resolving the contradiction between detection sensitivity and distance from source.
Solution Approach 2:
The invention transitions from a single-sided magnetic collection approach to a dual-sided configuration where magnetic collecting surfaces face mutually opposite directions. This dimensional change enables the sensor to effectively collect magnetic flux from a larger spatial volume, improving detection capability at extended distances.
2Length of moving object
If magnetic collecting surfaces are positioned far from magnetic field source, then detection range is improved, but magnetic field uniformity deteriorates
Solution Approach 1:
By dividing the magnetic collection function into two opposing magnetic bodies, each collecting flux from its respective side, the system maintains field uniformity while extending detection range. The segmented approach allows independent optimization of each collecting surface's position and orientation.
Solution Approach 2:
The magnetic flux collected from both the first and second magnetic bodies is combined and directed through the magnetic detecting part. This merging of flux paths from opposite sides creates a unified detection signal that maintains uniformity even when the sensor is positioned at a distance from the magnetic field source.
3Length of moving object
If magnetic collecting surfaces face mutually opposite sides, then detection range is improved, but device complexity increases
Solution Approach 1:
The two magnetic bodies are configured with asymmetric orientations, with their magnetic collecting surfaces facing mutually opposite sides. This asymmetric configuration enables extended detection range by capturing magnetic flux from both directions, while the symmetry of the opposing arrangement actually simplifies the overall structural balance.
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 detection of weak magnetic fields with high sensitivity and uniformity from a position apart from the magnetic field source, even when close proximity is not feasible due to obstacles.
Implementation Method 1
first and second magnetic bodies whose magnetic collecting surfaces face mutually opposite sides
Implementation Method 2
a magnetic coupling part magnetically coupled to the magnetic detecting part
Implementation Method 3
a magnetic detecting part that detects magnetic flux passing between the first and second magnetic bodies
Data Source
AI summary
To provide a magnetic sensor capable of detecting a weak magnetic field at a position situated apart from a magnetic field source. A magnetic sensor includes magnetic bodies whose magnetic collecting surfaces face mutually opposite sides and a magnetic detecting part 30 that detects magnetic flux passing between the magnetic bodies. With this configuration, magnetic flux collected from one magnetic collecting surface of one magnetic body passes to another magnetic collecting surface of another magnetic body through the magnetic detecting part, thereby making it possible to efficiently collect a magnetic field spreading in a space. Thus, even when a distance from a magnetic field source is large, magnetic collection can be achieved with high uniformity of a magnetic field.