Low Frequency Noise Measuring Apparatus with Electromagnetic Shielding

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Solution Overview

Problem

Conventional low frequency noise measuring apparatuses fail to effectively shield electromagnetic noise and heat, leading to inaccurate analysis and reliability issues due to noise leakage through gaps between chambers and doors.

Innovation Solution

A low frequency noise measuring apparatus with electromagnetic shielding characteristics, featuring a second shielding portion adjacent to the first, an electromagnetic wave shielding portion with elastic material and mesh, a fixing portion for secure door closure, and a honeycomb vent system for air flow management, which blocks electromagnetic waves and removes heat by controlling air circulation.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Object-affected harmful factors

If a conventional frequency shielding apparatus is used to remove external noise, then electromagnetic noise shielding is improved, but heat removal capability deteriorates

Engineering Contradiction:

Improveelectromagnetic noise shieldingVSAvoidheat removal capability

Core Design Contradiction:

Object-affected harmful factorsVSTemperature

Solution Approach 1:

The shielding apparatus is divided into separate functional components: electromagnetic shielding portions (chambers and doors) and heat removal portions (air inlet and air outlet). This segmentation allows each component to optimize its specific function without compromising the other, enabling simultaneous electromagnetic noise shielding and effective heat removal.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The shielding apparatus is designed to perform multiple functions: electromagnetic noise shielding through chamber structures, heat removal through air circulation paths, and sample analysis capability. By integrating these functions into a unified system, the apparatus achieves both noise shielding and heat removal capabilities that conventional single-function devices cannot provide.

Inventive Principle:

Principle #6Universality (Multi-functionality)

2Ease of operation

If the chamber door is opened for sample analysis, then measurement accessibility is improved, but noise leakage through gaps deteriorates

Engineering Contradiction:

Improvesample analysis accessibilityVSAvoidnoise leakage through gaps

Core Design Contradiction:

Ease of operationVSObject-affected harmful factors

Solution Approach 1:

An electromagnetic wave shielding portion is introduced as an intermediary element between the chamber interior and exterior. This shielding portion includes a mesh structure that allows air circulation for heat removal while blocking electromagnetic noise, and it maintains shielding effectiveness even when the door is open for sample analysis operations.

Inventive Principle:

Principle #24Intermediary (Mediator)

Solution Approach 2:

The shielding door incorporates a mesh structure that functions as a flexible electromagnetic barrier. This mesh film allows air to pass through for heat removal purposes while maintaining electromagnetic noise shielding, and it remains effective during door operations when samples are loaded or analyzed.

Inventive Principle:

Principle #30Flexible shells and thin films

3Temperature

If air circulation is increased to remove heat, then heat removal capability is improved, but electromagnetic noise shielding deteriorates

Engineering Contradiction:

Improveheat removal capabilityVSAvoidelectromagnetic noise shielding

Core Design Contradiction:

TemperatureVSObject-affected harmful factors

Solution Approach 1:

The shielding structure incorporates a mesh with controlled porosity that allows air molecules to pass through for heat removal while the mesh dimensions are designed to block electromagnetic waves. This porous structure enables simultaneous heat removal and electromagnetic shielding by exploiting the wavelength-dependent penetration properties of electromagnetic radiation through porous media.

Inventive Principle:

Principle #31Porous materials

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

Improves measurement accuracy and reliability by blocking electromagnetic waves and effectively removing heat generated from the sample and the measuring device, enhancing the overall performance of low frequency noise analysis.

Implementation Method 1

an electromagnetic wave shielding portion installed between the second chamber and the second door, wherein the electromagnetic wave shielding portion comprises a first mesh, which blocks the transmission of the electromagnetic wave

Methodology Applied

Scientific EffectElectromagnetic wave blocking: Faraday Cage

Implementation Method 2

an elastic material installed at the boundary of the opening of the second chamber, wherein the elastic material may pressurize the first mesh toward each of the inner surface of the boundary of the opening of the second chamber and the second door

Methodology Applied

Scientific EffectElastic deformation: Elasticity

Implementation Method 3

a honeycomb vent system for air flow management, which blocks electromagnetic waves and removes heat by controlling air circulation

Methodology Applied

Scientific EffectConvection: Convection

Data Source

PatentUS10520532B2Low frequency noise measuring apparatus with electromagnetic shielding characteristics

Publication Date: 2019.12.31 KOREA SENSOR LAB CO LTD

AI summary

The present invention relates to an apparatus for measuring low frequency noise having shielding characteristics, and enhance the accuracy of measurement of low frequency noise of a sample by blocking the flow of electromagnetic waves in the gap between the chamber and the door.