Camera Housing Membrane for High-Pressure Nozzle Fogging
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Solution Overview
Problem
High-pressure liquid inspection and cleaning nozzles with integrated cameras face issues of optical fogging and potential damage from pressure fluctuations and battery defects, which compromise the protection of sensitive electronics and optics within the camera housing.
Innovation Solution
A robust, thick-walled metal camera housing with a self-adhesive, air- and water-tight membrane for pressure equalization and protection, preventing liquid penetration and accommodating a camera module with optics and electronics, while ensuring the camera housing remains sealed and protected from environmental effects.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the camera housing is fully encapsulated to prevent liquid penetration, then protection from high-pressure liquids is improved, but pressure equalization and fogging prevention become problematic
Solution Approach 1:
A flexible membrane is integrated into the camera housing to create a pressure-equalizing barrier. This membrane allows pressure fluctuations to be compensated while maintaining water-tight sealing, preventing both liquid penetration and internal overpressure conditions that cause fogging
Solution Approach 2:
The membrane acts as an intermediary element between the external high-pressure liquid environment and the internal camera housing. It mediates the pressure transmission, allowing controlled pressure equalization while blocking liquid penetration, thus resolving the contradiction between sealing and pressure management
2Reliability
If overpressure protection is implemented to prevent damage from battery defects, then component protection is improved, but device complexity increases
Solution Approach 1:
The flexible membrane provides beforehand cushioning against overpressure conditions that may arise from battery defects or temperature increases. By being pre-installed in the camera housing, it passively compensates for pressure fluctuations without requiring additional active protection systems
Solution Approach 2:
The membrane system provides self-service overpressure protection by automatically expanding or contracting in response to internal pressure changes. This passive mechanism eliminates the need for complex active pressure regulation systems, sensors, or relief valves
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 prevents optical fogging and protects the camera's electronics and optics from high-pressure liquids and potential battery-induced overpressure, ensuring reliable operation and durability of the inspection nozzle.
Implementation Method 1
Pressure equalization in the interior of the camera housing can occur through the sufficiently thin membrane 4
Implementation Method 2
a membrane (4) which is glued onto the outer surface of the side wall of the camera housing (30), fully overlapping the bore (301)... The membrane 4 can also be configured as self-adhesive membrane 4 with a plastic layer
Data Source
AI summary
An inspection and/or cleaning nozzle for operation with liquids under high pressure includes a coupling section coupleable to a high-pressure tube and a camera recess running concentric to a longitudinal axis arranged in a camera-receiving portion. A camera module is accommodated releasably connected to an encapsulated water-tight camera housing. Optics and camera electronics are permanently incorporated in the camera housing such that the optics and camera electronics are protected in the interior of the camera housing and fogging of the optics is prevented. This is achieved in that a bore is made in the wall of camera housing running radially across the longitudinal axis direction, the opening of bore is sealed water-tight and air-tight with a membrane, so that the surface of membrane fully overlaps the opening of bore. This surface of the membrane is made correspondingly larger than bore and the membrane is formed multilayered from a laminate film.