Self-Powered Magnetic Read Head via Induction

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Solution Overview

Problem

Conventional magnetic sensing equipment relies on batteries, which lead to power depletion during continuous use, affecting accuracy and requiring frequent replacements, resulting in increased material and waste treatment costs.

Innovation Solution

Incorporating a power-generating device within the magnetic sensing read head that utilizes a magnetic scale with alternating N-pole and S-pole magnets to induce electric current, eliminating the need for battery replacement by continuously generating power through magnetic induction.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Duration of action of moving object

If a battery is used to power the magnetic sensing read head, then the device can operate continuously, but the battery power will be depleted over time requiring frequent replacement

Engineering Contradiction:

Improvecontinuous operation timeVSAvoidbattery replacement frequency

Core Design Contradiction:

Duration of action of moving objectVSLoss of time

Solution Approach 1:

The magnetic sensing read head incorporates a power-generating device that utilizes the relative motion between itself and the magnetic scale to generate electrical energy. This self-powered mechanism eliminates the need for external battery replacement, as the device generates its own power during normal operation through electromagnetic induction.

Inventive Principle:

Principle #25Self-service

Solution Approach 2:

The patent replaces the chemical energy storage system (battery) with an electromagnetic energy generation system. The power-generating device uses electromagnetic induction to convert mechanical motion into electrical energy, substituting the passive battery system with an active generation system that produces power during operation.

Inventive Principle:

Principle #28Mechanics substitution (Replace mechanical system)

2Reliability

If a battery is frequently replaced, then continuous operation is maintained, but material cost and waste treatment cost increase

Engineering Contradiction:

Improvesignal transmission continuityVSAvoidbattery material waste

Core Design Contradiction:

ReliabilityVSLoss of substance

Solution Approach 1:

The power-generating device enables the magnetic sensing read head to be self-sufficient in power generation. By utilizing the inherent relative motion during sensing operations to generate electricity through electromagnetic induction, the device eliminates the need for disposable batteries, thereby reducing material waste and associated disposal costs while maintaining continuous operation.

Inventive Principle:

Principle #25Self-service

Solution Approach 2:

The patent converts the previously harmful effect of battery waste into a beneficial self-powered operation. Instead of discarding depleted batteries, the system uses the motion that occurs during normal sensing operations to generate electricity, transforming what would be wasted mechanical energy into useful electrical power.

Inventive Principle:

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

3Productivity

If the magnetic sensing read head moves continuously to perform sensing, then measurement data is collected, but battery power is consumed continuously until depletion

Engineering Contradiction:

Improvesensing operation efficiencyVSAvoidbattery power consumption

Core Design Contradiction:

ProductivityVSUse of energy by moving object

Solution Approach 1:

The patent replaces the battery-powered electrical generation system with an electromagnetic induction-based generation system. The power-generating device utilizes the relative motion between the magnetic sensing read head and the magnetic scale to induce electrical current, converting mechanical motion directly into electrical energy to power the sensing operations.

Inventive Principle:

Principle #28Mechanics substitution (Replace mechanical system)

Solution Approach 2:

The power-generating device ensures continuous power generation during the entire sensing operation. As the magnetic sensing read head moves relative to the magnetic scale to collect measurement data, the power-generating device continuously generates electricity through electromagnetic induction, maintaining uninterrupted power supply without battery depletion.

Inventive Principle:

Principle #20Continuity of useful action

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

Ensures uninterrupted signal transmission and improved machining accuracy by self-sustaining power supply, reducing material costs and environmental pollution associated with battery disposal.

Implementation Method 1

The power-generating device moves with respect to the magnetic scale to produce changes of magnetic field for inducing electric current

Methodology Applied

Scientific EffectMagnetic induction: Electromagnetic Induction

Data Source

PatentUS7425768B1Power-generating magnetic sensing equipment

Publication Date: 2008.09.16 HIWIN MIKROSYST

AI summary

A power-generating magnetic sensing equipment comprises a magnetic sensing read head and a magnetic scale. The magnetic sensing read head includes a power-generating device and a signal sensing control device. The magnetic sensing read head moves with respect to the magnetic scale to make the power-generating device produce changes of magnetic field to induce the electric current, so that the power-generating device is able to continuously supply the power to the signal sensing control device, thus keeping the signal transmission uninterrupted.