Ferromagnetic Sensor Coil Reset for Stress-Induced Magnetic Drift

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Solution Overview

Problem

External stress overload on ferromagnetic components can damage or destroy the magnetic field, leading to impaired sensitivity and offset in magnetic field sensors, which affects their ability to function as primary sensors in various applications.

Innovation Solution

A device comprising a coil generating an oscillating magnetic field with a magnetic flux density of at least 30 Gauss is wound around the magnetic field sensor and/or ferromagnetic component to correct the external stress overload by resetting the magnetic disturbance to normal, thereby restoring the magnetic field's homogeneity and sensor sensitivity.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If an external stress overload acts on the ferromagnetic component, then the mechanical stress is detected, but the magnetic field is damaged or destroyed leading to sensor impairment

Engineering Contradiction:

Improvesensor functionalityVSAvoidmagnetic field damage

Core Design Contradiction:

ReliabilityVSObject-affected harmful factors

Solution Approach 1:

The patent applies preliminary anti-action by using a coil to generate a counteracting magnetic field that opposes and neutralizes the stress-induced magnetic disturbances in the ferromagnetic component before they can permanently damage the sensor functionality. The coil creates a corrective magnetic field that actively counteracts the harmful effects of external stress overload.

Inventive Principle:

Principle #9Preliminary anti-action

Solution Approach 2:

The patent converts the harmful effect of external stress overload into a beneficial correction process. The stress-induced magnetic field changes, which initially damage the sensor, are subsequently used as information to guide the corrective action. The system detects the stress effect and uses it to generate a targeted corrective magnetic field that restores the sensor to its original state, turning the harmful stress effect into a useful diagnostic and correction mechanism.

Inventive Principle:

Principle #22Blessing in disguise (Convert harm into benefit)

2Measurement precision

If the ferromagnetic component is subjected to external stress overload, then the stress effect is produced, but the magnetic field homogeneity and sensor sensitivity are impaired

Engineering Contradiction:

Improvesensor sensitivityVSAvoidmagnetic field homogeneity

Core Design Contradiction:

Measurement precisionVSStability of the object's composition

Solution Approach 1:

The patent implements feedback by continuously monitoring the magnetic field sensor output and using this information to control the coil's corrective magnetic field. The system detects changes in the magnetic field caused by external stress, processes this information, and adjusts the coil's magnetic field accordingly to restore the original magnetic field homogeneity and sensor sensitivity, creating a closed-loop correction system.

Inventive Principle:

Principle #23Feedback

Solution Approach 2:

The patent applies parameter changes by modifying the magnetic field parameters (strength, direction, frequency) generated by the coil to counteract the stress-induced changes in the ferromagnetic component. By dynamically adjusting the coil's electrical current and resulting magnetic field parameters, the system restores the magnetic field homogeneity and sensor sensitivity to their original values, effectively reversing the stress effects through parameter modulation.

Inventive Principle:

Principle #35Parameter changes

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

The oscillating magnetic field effectively resets the magnetic field and sensor sensitivity to normal, correcting the zero point shift and gradient change caused by external stress overload, ensuring the ferromagnetic component's functionality is maintained.

Implementation Method 1

The coil generates an oscillating magnetic field and a magnetic flux density of at least 30 Gauss

Methodology Applied

Scientific EffectElectromagnetic induction: Electromagnetic Induction

Implementation Method 2

The magnetic-field shows a magneto-elastic effect which is obtained in cooperation with the type of magnetization used to generate the magnetic field

Methodology Applied

Scientific EffectMagneto-elastic effect: Magnetoelastic Effects

Data Source

PatentUS12051541B2Device for correcting an external stress overload affecting a ferromagnetic component

Publication Date: 2024.07.30 METHODE ELECTRONICS MALTA LTD

AI summary

Device for correcting the effect of an external stress overload affecting a ferromagnetic component, comprising: the ferromagnetic component, having at least one magnetic field, and a magnetic field sensor, and at least one coil, being arranged around the magnetic field sensor and/or around the ferromagnetic component, and generating a magnetic field, with the field providing an oscillating magnetic field and a magnetic flux density of at least 30 Gauss.