Autonomous Laser Vehicle Beam Dump Heat Exchanger
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Solution Overview
Problem
Existing technologies face challenges in deploying autonomous vehicles capable of penetrating extremely deep ice caps, such as those on Earth and other celestial bodies, due to limitations in power transmission and ice penetration mechanisms, particularly in maintaining structural integrity and efficient heat management for large-scale ice melting.
Innovation Solution
An autonomous laser-powered vehicle with a cylindrical configuration, utilizing a beam dump heat exchanger and armored process fiber to transmit and convert laser power into heat for ice melting, while maintaining structural modularity and efficient heat transfer for both descent and ascent missions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Power
If laser power is transmitted through optical fiber to melt ice, then ice penetration capability is improved, but heat management and structural integrity become more difficult to maintain
Solution Approach 1:
The vehicle is divided into modular segments including a beam dump module, heat exchanger module, and payload module. This segmentation allows independent optimization of heat management in the beam dump while maintaining structural integrity of the overall vehicle, resolving the contradiction between high power transmission and system reliability.
Solution Approach 2:
A beam dump acts as an intermediary component that converts concentrated laser energy into thermal energy for ice melting. This intermediary protects the optical fiber and vehicle structure from direct exposure to extreme heat, maintaining both power transmission capability and structural integrity.
2Power
If beam dump size is increased to handle higher laser power, then power handling capability is improved, but vehicle size and complexity increase
Solution Approach 1:
The optical fiber is nested within the beam dump structure, and the beam dump is integrated into the modular vehicle platform. This nesting allows the beam dump to be compact while still handling high power, reducing overall vehicle size and complexity.
Solution Approach 2:
The beam dump utilizes phase change of water (ice to liquid) as a parameter change mechanism to absorb and manage heat efficiently. This allows effective heat management with a compact beam dump design, avoiding the need for large thermal mass.
3Ease of repair
If modular design is implemented for easy field replacement, then ease of repair is improved, but manufacturing and assembly complexity increase
Solution Approach 1:
The vehicle employs segmentation by dividing the system into standardized modular components with uniform connection interfaces. This allows easy field replacement of individual modules while the standardized design actually simplifies manufacturing through repeated production of identical components.
Solution Approach 2:
The modular architecture uses universal connection standards and interfaces across all modules, making the same connection hardware and procedures applicable to multiple different module types. This universality reduces both assembly complexity and repair difficulty.
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
Enables deep penetration and sample return missions through ice caps by efficiently converting laser power into heat for ice melting, ensuring structural integrity and reliability, and allowing for easy replacement of components in the field.
Implementation Method 1
a beam dump heat exchanger... to transmit and convert laser power into heat for ice melting
Implementation Method 2
beam dump heat exchanger... efficient heat transfer for both descent and ascent missions
Implementation Method 3
armored process fiber to transmit and convert laser power
Implementation Method 4
converting laser power into heat for ice melting... penetrate extremely deep glacial ice caps
Data Source
AI summary
An autonomous laser-powered vehicle designed to autonomously penetrate through ice caps of substantial (e.g., kilometers) thickness by melting a path ahead of the vehicle as it descends. A high powered laser beam is transmitted to the vehicle via an onboard bare fiber spooler. After the beam enters through the dispersion optics, the beam expands into a cavity. A radiation shield limits backscatter radiation from heating the optics. The expanded beam enters the heat exchanger and is reflected by a dispersion mirror. Forward-facing beveled circular grooves absorb the reflected radiant energy preventing the energy from being reflected back towards the optics. Microchannels along the inner circumference of the beam dump heat exchanger maximize heat transfer. Sufficient amount of fiber is wound on the fiber spooler to permit not only a descent but also to permit a sample return mission by inverting the vehicle and melting its way back to the surface.