Lightweight SCUBA Pressure Vessel with Dynamic Volume Adjustment
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Solution Overview
Problem
Conventional SCUBA pressure vessels are heavy and cumbersome, requiring additional weight to maintain buoyancy throughout a dive due to fixed volume and changing gas mass, leading to handling difficulties and increased risk of injuries.
Innovation Solution
A variable volume pressure vessel with a dynamic partitioning element and fluid pressurization system that adjusts the vessel's volume to maintain buoyancy as gas is consumed, using mechanisms like pistons, flexible bladders, and pumps to introduce fluid into a fluid chamber, maintaining a gas-out:liquid-in mass ratio.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Weight of moving object
If lighter materials are used to reduce pressure vessel weight, then construction mass is reduced, but buoyancy increases causing the vessel to be overly buoyant at the end of the dive
Solution Approach 1:
The pressure vessel incorporates a variable volume mechanism that allows the vessel to dynamically adjust its displacement volume throughout the dive. As gas is consumed and mass decreases, the vessel expands to increase buoyant force, maintaining neutral buoyancy. This dynamic adjustment resolves the contradiction between using light materials and maintaining stable buoyancy composition.
Solution Approach 2:
The system changes the physical parameter of volume from a fixed value to a variable value that responds to gas consumption. By monitoring gas mass loss and相应 adjusting volume, the system maintains the relationship between mass and buoyant force, preventing the overly buoyant condition that would result from simply using lighter materials.
2Ease of manufacture
If fixed volume pressure vessels are used, then manufacturing is simpler, but additional weight is required to maintain buoyancy as gas is consumed
Solution Approach 1:
Rather than using a fixed volume vessel with added ballast weight, the invention employs a dynamic volume adjustment mechanism that automatically compensates for gas consumption. This eliminates the need for ballast weight while providing the buoyancy control function, resolving the contradiction between manufacturing simplicity and total system weight.
3Stability of the object's composition
If pressure vessel volume is increased to compensate for gas mass loss, then buoyancy is maintained, but device complexity increases
Solution Approach 1:
The system incorporates sensors that automatically detect gas mass loss and trigger volume expansion without requiring manual intervention from the diver. This self-service approach maintains buoyancy stability while minimizing the complexity of control mechanisms, as the system autonomously responds to changing conditions.
Solution Approach 2:
The volume adjustment mechanism utilizes pneumatic or hydraulic principles to achieve smooth, controlled expansion of the pressure vessel. By using fluid pressure systems rather than complex mechanical linkages, the design maintains buoyancy control functionality while reducing overall device complexity.
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 system allows for easier handling, safer transport, and longer dive times by self-balancing buoyancy, eliminating the need for additional weight and reducing buoyancy penalties.
Implementation Method 1
Archimedes' principle states that the upward buoyant force that is exerted on a body immersed in a fluid is equal to the weight of the fluid that the body displaces. A standard SCUBA pressure vessels have fixed volume. Hence, it displaces a fixed amount of water and the upward force is constant.
Implementation Method 2
a dynamic partitioning element mounted within the interior volume separating the interior volume into a breathing gas portion and a fluid portion
Implementation Method 3
The pneumatically actuated pump can have a gas inlet for accepting pressurized gas to drive the pump, and wherein the gas inlet is in communication with the breathing gas portion of the vessel.
Data Source
AI summary
Conventional SCUBA diving equipment is heavy and cumbersome, mainly due to the mass and size of the breathing gas carrier, i.e. the pressure vessel. A preferred pressure vessel for SCUBA diving can be as light as possible and neutrally buoyant at all stages of the dive. To achieve such preferred characteristics, the pressure vessel volume can be adjusted in accordance with the change in its mass. The present invention provides SCUBA systems that provides for the preferred characteristics.