Rigid Buoyancy Control Chambers for Automatic Neutral Buoyancy
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Solution Overview
Problem
Divers face challenges in maintaining neutral buoyancy due to factors like gas consumption, neoprene compression, and BCD volume changes during dives, which can lead to dangerous ascents and descents.
Innovation Solution
An apparatus with a rigid casing containing separate chambers for gas and incompressible liquid, equipped with valves and pressure-sensitive mechanisms to automatically adjust buoyancy by adjusting the gas and liquid volumes to maintain a constant volume, allowing for automatic adjustments to maintain neutral buoyancy, allowing for automatic adjustments to maintain neutral buoyancy.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a traditional BCD is used to control buoyancy, then the diver can adjust buoyancy by adding or removing gas, but the BCD volume must be continuously adjusted to compensate for gas consumption and neoprene compression, requiring constant diver intervention
Solution Approach 1:
The system uses the diver's own breathing gas to automatically adjust buoyancy. When the diver breathes, the pressure changes automatically transfer gas between the BCD and the regulator, eliminating the need for manual valve operations. The system serves itself by using the existing breathing cycle to maintain buoyancy equilibrium.
Solution Approach 2:
The system establishes a feedback loop where the pressure changes from breathing automatically trigger gas transfer between the BCD and regulator. The pressure sensor detects pressure changes and the system responds automatically by adjusting gas volume in the BCD, creating a closed-loop control system that maintains buoyancy without continuous diver input.
2Reliability
If the BCD volume is increased to compensate for gas consumption, then buoyancy is maintained, but the risk of uncontrolled ascent increases
Solution Approach 1:
The system uses pressure sensing to detect when the BCD is over-inflated and automatically transfers gas back to the regulator. This feedback mechanism prevents uncontrolled ascent by continuously monitoring and adjusting BCD volume based on actual pressure conditions, ensuring safe ascent rates.
Solution Approach 2:
The system automatically regulates its own volume by using the diver's breathing pressure changes to transfer gas between the BCD and regulator. This self-regulating capability prevents both insufficient and excessive buoyancy without requiring diver intervention, thereby eliminating the risk of uncontrolled ascent.
3Reliability
If manual buoyancy adjustments are made during the dive, then buoyancy can be maintained, but the diver must continuously monitor and intervene
Solution Approach 1:
The system performs buoyancy adjustments automatically using the diver's own breathing cycle. The pressure changes from normal breathing trigger automatic gas transfer between the BCD and regulator, eliminating the need for the diver to spend time monitoring and manually adjusting buoyancy while allowing full attention to other diving tasks.
Solution Approach 2:
The system operates continuously throughout the dive without requiring intermittent manual intervention. The automatic pressure-driven gas transfer occurs continuously as the diver breathes, maintaining neutral buoyancy throughout the entire dive profile without breaking the diver's focus or requiring periodic checks.
4Reliability
If the BCD is designed with large volume for maximum buoyancy, then the diver can maintain neutral buoyancy, but the apparatus becomes more complex and harder to control
Solution Approach 1:
The system uses the existing breathing gas and pressure changes for multiple purposes: both for buoyancy control and for automatic volume regulation. The same pressure changes from breathing that provide breathable gas also automatically trigger buoyancy adjustments, eliminating the need for separate control mechanisms and reducing overall system complexity.
Solution Approach 2:
The system uses the diver's own breathing pressure changes to automatically regulate BCD volume, eliminating the need for separate manual control mechanisms. This self-regulating approach reduces complexity by integrating buoyancy control directly into the existing breathing cycle without requiring additional sensors, valves, or control systems.
Data Source
AI summary
An apparatus constrainable to a diver, including a buoyancy control system for a diver including: —a rigid means which identifies an operating zone; the operating zone being intended to receive a gas and an incompressible liquid; the zone being defined by a first chamber or by the sum of at least a first and a second chamber; —a first means for introducing the incompressible fluid into the operating zone; —a first means for introducing the gas into the operating zone; —a pressurised tank of the gas, the first means for introducing the gas being operatively interposed between the tank and the operating zone; —a means for evacuating a fluid from the operating zone, the fluid being the gas and/or the incompressible liquid.