Armored Vehicle Corner Reflector EMI Shielding

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Solution Overview

Problem

Existing corner reflectors for armored vehicles do not effectively protect against sources of electromagnetic interference, which can damage or destroy the vehicle or its electronic components.

Innovation Solution

A corner reflector with a housing featuring a look-in and look-out aperture, incorporating a whole-area shield made of electrically conductive material, such as superfine metallic wire netting or transparent conductive coatings, to prevent electromagnetic interference penetration, with adjustable shielding attenuation and secure contact to the vehicle shell.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Object-affected harmful factors

If a corner reflector is equipped with a whole-area shield made of electrically conductive material, then shielding against electromagnetic interference is improved, but light transmission is reduced

Engineering Contradiction:

Improveshielding against electromagnetic interferenceVSAvoidlight transmission

Core Design Contradiction:

Object-affected harmful factorsVSIllumination intensity

Solution Approach 1:

The patent employs mesh fabric or fabric netting made of conductive fibers with controlled opening densities (25-250 openings per inch) to create a porous shield structure. This allows light to pass through the openings while the conductive fibers maintain electromagnetic shielding effectiveness, resolving the contradiction between shielding performance and light transmission.

Inventive Principle:

Principle #31Porous materials

Solution Approach 2:

The patent uses composite structures combining conductive fibers embedded in melt foil or hot-pressed between plastic panes, creating a multi-layer composite material that provides both electromagnetic shielding and optical transparency. The composite nature allows optimization of both shielding and light transmission properties.

Inventive Principle:

Principle #40Composite materials

2Object-affected harmful factors

If superfine conductive wire netting is used for shielding, then shielding effectiveness is improved, but the netting becomes vulnerable to damage

Engineering Contradiction:

Improveshielding effectivenessVSAvoidnetting durability

Core Design Contradiction:

Object-affected harmful factorsVSStrength

Solution Approach 1:

The patent embeds the fragile conductive netting between protective layers (glass or plastic panes) or within melt foil, creating a nested structure where the delicate shielding layer is protected by stronger outer layers. This preserves the fine mesh structure needed for high-frequency shielding while preventing physical damage.

Inventive Principle:

Principle #7Nested doll (Nesting)

Solution Approach 2:

The patent uses thin protective panes and foil layers to encase the conductive netting, providing mechanical protection while maintaining the flexibility and thin profile needed for integration into corner reflector housings and vehicle windows.

Inventive Principle:

Principle #30Flexible shells and thin films

3Reliability

If the shield is positioned in front of the look-out aperture, then electronic components of the corner reflector are protected, but the shielding area is reduced

Engineering Contradiction:

Improveprotection of electronic componentsVSAvoidshielding area

Core Design Contradiction:

ReliabilityVSArea of stationary object

Solution Approach 1:

The patent implements shielding with different properties at different locations: the shield in front of the look-out aperture is optimized for protecting electronic components, while additional shields at look-in apertures and in beam paths provide targeted protection where needed. Each local shielding area is optimized for its specific function.

Inventive Principle:

Principle #3Local quality

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 solution effectively shields the vehicle and its electronic components from electromagnetic interference, ensuring their functionality and integrity by blocking interference sources while maintaining high light transmission.

Implementation Method 1

A whole-area shield made of electrically conductive material protects the vehicle or electronic components of the vehicle against damage or interference by sources of electromagnetic interference

Methodology Applied

Scientific EffectElectromagnetic shielding: Faraday Cage

Implementation Method 2

at least one prism body or deflection mirrors disposed in the housing

Methodology Applied

Scientific EffectLight reflection: Reflection

Data Source

PatentUS9086572B2Corner reflector for an armored vehicle

Publication Date: 2015.07.21 GUS PERISCOPES

AI summary

A corner reflector of an armored vehicle includes a housing having a look-in aperture of a subregion extending into a vehicle interior, a look-out aperture of a subregion extending out of the vehicle and at least one prism body or deflection mirrors disposed in the housing, to provide effective shielding against sources of electromagnetic interference. Providing the corner reflector on all sides with a shield made of electrically conductive material ensures that vehicles equipped therewith or individual electronic components thereof cannot be influenced or rendered unusable by sources of electromagnetic interference.