Rotational Optical Sensor Platform for Pressure Differential Management
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Solution Overview
Problem
Optical scanning sensor platforms face challenges in operating within mediums with different pressures, such as underwater environments where high external pressures require maintaining pressure differentials across optical apertures without mechanical distortion, and at high altitudes where internal pressures differ significantly from external conditions.
Innovation Solution
A vehicle design with a rotational pivot and chamber that allows the optical sensor platform to rotate relative to the axis of travel, maintaining a pressure difference across the optical aperture while stabilizing the vehicle, utilizing a stable portion attached to the rotational chamber via the pivot, and incorporating control surfaces for stabilization and propulsion through fluids or gases.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the optical sensor platform is made rotatable to increase the field of regard, then the scanning capability and field of regard are improved, but the mechanical distortion and pressure differential challenges worsen
Solution Approach 1:
The vehicle is divided into a stable portion and a rotational portion connected by a rotational pivot. The optical sensor platform is located in the rotational portion which can rotate independently around the axis of travel, allowing the sensor to scan different directions while the stable portion maintains structural integrity and pressure differential stability.
Solution Approach 2:
A rotational pivot serves as an intermediary mechanism between the stable portion and the rotational portion. This pivot allows rotational motion while maintaining the pressure differential barrier, enabling the optical platform to change orientation without compromising the structural integrity or pressure containment of the main vehicle body.
2Reliability
If the rotational chamber is designed to maintain pressure difference across the optical aperture, then the pressure differential is maintained, but the device complexity increases
Solution Approach 1:
The rotational chamber is designed to dynamically maintain pressure differential during rotation. The chamber structure includes pressure equalization mechanisms and sealed interfaces that automatically adjust during rotational movement, allowing the optical platform to rotate while the pressure barrier remains intact without requiring complex active control systems.
Solution Approach 2:
The rotational chamber utilizes flexible or elastic sealing elements at the rotational pivot interface that can accommodate rotational movement while maintaining the pressure differential barrier. These flexible sealing structures allow relative rotation between the stable and rotational portions while preventing pressure equalization, simplifying the overall design compared to rigid sealed systems.
3Stability of the object's composition
If the stable portion includes means for stabilization to remain rotationally stable, then the vehicle stability is improved, but the device complexity increases
Solution Approach 1:
The stable portion includes stabilization means such as control surfaces or fins that generate counteracting forces to maintain rotational stability. These stabilization elements are positioned to automatically counteract rotational disturbances through aerodynamic or hydrodynamic forces, providing passive stability without requiring complex active control systems.
Solution Approach 2:
The stabilization means are designed to automatically maintain rotational stability through self-correcting mechanisms. The control surfaces or fins are positioned and oriented such that any deviation from the stable orientation automatically generates restoring forces, enabling the vehicle to self-stabilize without continuous active control intervention.
Data Source
AI summary
Provided herein are systems and methods for scanning an optical sensor on a platform required to operate within a medium having a different pressure than the internal pressure of the sensor, including both underwater and high-altitude applications. For the case of underwater platforms, portions of the vehicle may be pulled or driven by propulsive forces through the water, whereas other portions of the vehicle may carry the platform for optical scanning, attached and rotationally controlled with respect to the driven portion of the vehicle. The platform may be rotated with respect to the portion that is pulled or driven through the water or other fluid. In some embodiments, that driven portion remains rotationally fixed with respect to the water. Other embodiments of vehicles in different environments may interface with different fluids or gasses and may be driven through the fluids or gases in similar manners.