Polysulfone Dome for Explosion-Proof Camera Housing

Solution Overview

Problem

Existing surveillance camera systems face issues with image distortion and mechanical stress due to thick polycarbonate domes, which are not adequately resistant to explosions and extreme conditions, compromising image quality and durability.

Innovation Solution

The use of a polysulfone optical protective dome with a circumferential fastening flange, offering improved mechanical strength, reduced wall thickness, and enhanced chemical resistance, combined with a thermally cured silicone coating and optimized surface smoothing for minimal light refraction and high transparency.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Ease of manufacture

If polycarbonate is used for the optical protective dome, then ease of manufacture is improved, but image distortion increases due to required thick wall thickness

Engineering Contradiction:

Improveease of manufactureVSAvoidimage distortion

Core Design Contradiction:

Ease of manufactureVSManufacturing precision

Solution Approach 1:

The patent changes the material parameter from polycarbonate to polysulfone, which has superior mechanical strength properties. This allows the wall thickness to be reduced from 5mm or more to 2-4mm, thereby reducing image distortion while maintaining manufacturability through injection molding processes.

Inventive Principle:

Principle #35Parameter changes

Solution Approach 2:

The patent employs a composite structure by applying a thermally cured silicone coating on the polysulfone dome. This composite approach provides both mechanical strength and optical clarity, minimizing image distortion while maintaining ease of manufacture through standardized coating processes.

Inventive Principle:

Principle #40Composite materials

2Strength

If wall thickness is increased to meet mechanical requirements, then strength is improved, but image distortion increases

Engineering Contradiction:

Improvemechanical strengthVSAvoidimage distortion

Core Design Contradiction:

StrengthVSManufacturing precision

Solution Approach 1:

The patent changes the material parameter from polycarbonate to polysulfone, which has superior mechanical strength properties. This allows the wall thickness to be reduced from 5mm or more to 2-4mm, thereby reducing image distortion while maintaining manufacturability through injection molding processes.

Inventive Principle:

Principle #35Parameter changes

3Ease of manufacture

If conventional materials are used, then ease of manufacture is maintained, but resistance to explosions and extreme conditions deteriorates

Engineering Contradiction:

Improveease of manufactureVSAvoidexplosion and pressure resistance

Core Design Contradiction:

Ease of manufactureVSReliability

Solution Approach 1:

The patent changes the material parameter from polycarbonate to polysulfone, which has superior mechanical strength properties. This allows the wall thickness to be reduced from 5mm or more to 2-4mm, thereby reducing image distortion while maintaining manufacturability through injection molding processes.

Inventive Principle:

Principle #35Parameter changes

Solution Approach 2:

The patent employs a composite structure by applying a thermally cured silicone coating on the polysulfone dome. This composite approach provides both mechanical strength and optical clarity, minimizing image distortion while maintaining ease of manufacture through standardized coating processes.

Inventive Principle:

Principle #40Composite 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

The polysulfone dome achieves superior mechanical strength, reduced image distortion, and high transparency, ensuring reliable image quality under extreme conditions and explosions, with improved resistance to environmental and chemical influences.

Implementation Method 1

a thermally cured, abrasion-resistant, and weather-resistant silicone scratch-resistant coating

Methodology Applied

Scientific EffectThermal curing:

Implementation Method 2

the outer and inner surfaces of the optical protective dome are smoothed by turning... counteracting an undesirable 'orange peel' effect

Methodology Applied

Scientific EffectLight refraction: Refraction

Data Source

PatentEP4391566A1Protective housing for a monitoring camera system and monitoring camera system

Publication Date: 2024.06.26 SAMCON PROZESSLEITTECHNIK GMBH

Figure 1
Figure 2a~2c

AI summary

The invention relates to a protective housing (10) for use in explosion-proof and pressure-resistant surveillance camera systems, comprising an optical protective dome (7) for enclosing a camera lens, wherein the optical protective dome (7) comprises a highly transparent optical material, and with a circumferential mounting flange (9) for fixing the optical protective dome (7). According to the invention, the optical protective dome (7) of the protective housing (10) comprises a polysulfone.