Scuba Diving Safety Device for Automatic Buoyancy Control
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Solution Overview
Problem
Existing SCUBA diving safety devices fail to adequately address the risk of drowning when divers surface without ensuring buoyancy, as they often do not detect situations where the diver has stopped breathing, leading to inadequate inflation of the diving jacket and failure to release weights in emergency situations.
Innovation Solution
A safety device that automatically initiates inflation of the diving jacket and dumping of weights if the diver has not breathed for a predefined time, using an actuator triggered by depth sensors and a pressure sensing mechanism, ensuring the diver's buoyancy is maintained and facilitating a safe ascent.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If automatic safety devices are implemented to detect breathing cessation, then drowning prevention is improved, but device complexity increases
Solution Approach 1:
The patent integrates multiple safety functions into a single device: breath detection, automatic jacket inflation, and automatic weight release. This multi-functional approach improves drowning prevention while avoiding the complexity of multiple separate devices, as the actuator serves universal purposes for both buoyancy control and weight dumping
Solution Approach 2:
The safety device operates autonomously by detecting breathing cessation through the breathing regulator and automatically triggering both jacket inflation and weight release without diver intervention. The system serves itself by using the breathing regulator's airflow information to activate safety mechanisms, eliminating the need for separate monitoring systems
2Reliability
If the actuator automatically releases weights, then buoyancy control is improved, but the risk of unintended activation increases
Solution Approach 1:
The system performs preliminary inflation of the buoyancy jacket before automatic weight release when breathing cessation is detected. This sequence ensures the diver has positive buoyancy established first, reducing the harmful effect of sudden weight loss and preventing unintended rapid ascent. The preliminary action of jacket inflation acts as a safety buffer before the more critical weight release function
Solution Approach 2:
The actuator continuously monitors breathing regulator airflow to detect breathing cessation and triggers weight release only when no airflow is detected for a predetermined time period. This feedback mechanism prevents unintended activation by requiring sustained absence of breathing rather than momentary obstruction, ensuring reliable discrimination between normal breathing variations and actual breathing cessation
3Measurement precision
If the safety device uses existing breathing regulator airflow detection, then measurement precision is improved, but the ability to detect non-breathing situations is worsened
Solution Approach 1:
The system dynamically adjusts its detection threshold by requiring breathing cessation to persist for a predetermined time period before triggering safety functions. This dynamic approach allows the system to tolerate momentary airflow obstructions or irregular breathing patterns while reliably detecting sustained breathing cessation, thereby resolving the contradiction between measurement precision and reliability in detecting non-breathing situations
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 drowning by ensuring the diver's buoyancy is maintained and enabling a safe ascent, even in situations where the diver is incapacitated, thereby enhancing safety during SCUBA diving operations.
Implementation Method 1
an actuator being able to automatically initiate inflation of the diving jacket when the diver has not affected the air flow through the breathing regulator for a certain time period, wherein said actuator is controlled by an actuation mechanism that automatically sets the actuator in active mode when the diver is within an actuation zone
Implementation Method 2
when the diver has not affected the air flow through the breathing regulator for a certain time period
Implementation Method 3
an inflatable diving jacket comprising a weight pocket system
Data Source
Figure 1a~1b
Figure 1c
Figure 2
AI summary
The present invention relates to a safety method in connection with SCUBA diving to control a diver's buoyancy, in which method the diver (11) is equipped with diving equipment comprising at least one air pressure tank (1), a valve device (2) connected to the pressure tank (1) and arranged to supply air from said pressure tank via first supply means (5) to a breathing regulator (4) and via second supply means (7, 9, 12) to an inflatable diving jacket (6) in order to control the diver's buoyancy, an actuator (8) being able to automatically initiate inflation of the diving jacket (6) when the diver has not affected the air flow through the breathing regulator (4) for a certain time period, said actuator (8) being controlled by an actuation mechanism (20) that automatically sets the actuator in active mode when the diver is within an actuation zone (A), wherein in order additionally to improve the diver's buoyancy the actuator (8) is also arranged to automatically initiate dumping of a weight (11) carried by the diver when the air flow through the breathing regulator (4) has ceased for a certain time period. The invention also comprises a safety device, an inflatable diving jacket and an inflator.