Pulsed EMF Sensor Protects Circuitry

Solution Overview

Problem

Pulsed electromagnetic field devices (PEMF) generate high-energy electromagnetic fields that can damage their own internal circuitry due to proximity to the coil looped inductor.

Innovation Solution

Incorporating a pulsed EMF sensor with a fibre optic cable to detect EMF pulses and communicate a light signal to the generator, which stops EMF generation when pulses are detected, thereby protecting internal circuitry.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Volume of moving object

If the coil looped inductor is positioned close to the internal circuitry for compact device design, then the device size is reduced, but the EMF pulses can damage the internal circuitry

Engineering Contradiction:

Improvedevice sizeVSAvoidcircuitry damage from EMF pulses

Core Design Contradiction:

Volume of moving objectVSObject-affected harmful factors

Solution Approach 1:

A sensor is introduced as an intermediary component between the coil looped inductor and the internal circuitry. The sensor detects EMF pulses generated by the coil and triggers a shutdown signal to protect the internal circuitry, enabling the coil to be positioned close to the circuitry without causing damage.

Inventive Principle:

Principle #24Intermediary (Mediator)

Solution Approach 2:

The sensor provides feedback about the presence of EMF pulses to the control system. When the sensor detects pulses from the coil, it sends a signal to stop further EMF generation, creating a feedback loop that prevents circuitry damage while allowing compact positioning.

Inventive Principle:

Principle #23Feedback

2Power

If the device generates high-energy EMF pulses for effective therapeutic treatment, then the therapeutic effectiveness is improved, but the risk of damaging internal circuitry increases

Engineering Contradiction:

ImproveEMF pulse energyVSAvoidcircuitry damage risk

Core Design Contradiction:

PowerVSObject-affected harmful factors

Solution Approach 1:

The sensor acts as a mediator that monitors the high-energy EMF pulses without being damaged by them. It detects the presence of pulses and triggers protective shutdown, allowing the device to generate high-power therapeutic EMF pulses safely.

Inventive Principle:

Principle #24Intermediary (Mediator)

Solution Approach 2:

The sensor provides advance warning by detecting EMF pulses before they can reach and damage the internal circuitry. This early detection allows the system to shut down proactively, cushioning the circuitry from potential damage.

Inventive Principle:

Principle #11Beforehand cushioning (Prior cushioning)

3Reliability

If a sensor is added to detect EMF pulses and protect internal circuitry, then circuitry protection is improved, but the device complexity increases

Engineering Contradiction:

Improvecircuitry protectionVSAvoiddevice structure

Core Design Contradiction:

ReliabilityVSDevice complexity

Solution Approach 1:

A sensor is introduced as an intermediary component between the coil looped inductor and the internal circuitry. The sensor detects EMF pulses generated by the coil and triggers a shutdown signal to protect the internal circuitry, enabling the coil to be positioned close to the circuitry without causing damage.

Inventive Principle:

Principle #24Intermediary (Mediator)

Solution Approach 2:

The sensor provides feedback about the presence of EMF pulses to the control system. When the sensor detects pulses from the coil, it sends a signal to stop further EMF generation, creating a feedback loop that prevents circuitry damage while allowing compact positioning.

Inventive Principle:

Principle #23Feedback

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

Prevents damage to internal circuitry by stopping EMF generation in response to detected pulses, ensuring safety and compliance with electromagnetic compatibility standards.

Implementation Method 1

a sensor configured to detect an EMF pulse and provide, over an output, an output signal indicative of each detected EMF pulse

Methodology Applied

Scientific EffectElectromagnetic induction: Electromagnetic Induction

Implementation Method 2

the output of the sensor is in communication with the pulsed EMF generator over a fibre optic cable, and the output signal of the sensor is a light signal

Methodology Applied

Scientific EffectOptical signal transmission: Optical Fibre

Data Source

PatentEP4622707B1Pulsed electromagnetic field device with sensor

Publication Date: 2026.03.25 HOFMEIR MAGNETICS LTD

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AI summary

The disclosure relates to a pulsed electromagnetic field (EMF) device. The pulsed EMF device comprises a pulsed EMF generator that is configured to generate EMF pulses. The pulsed EMF device also comprises a sensor having an output that is in communication with the pulsed EMF generator. The sensor is configured to detect an EMF pulse and provide, over the output, an output signal indicative of each detected EMF pulse. The pulsed EMF generator is further configured to stop generating the EMF pulses in response to the sensor detecting one or more EMF pulses.