Electromechanical Connector Switching for Spark-Free Oxygen Power Mating
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Solution Overview
Problem
The connection of an unpowered electrical subsystem to a host electrical system can result in electrostatic discharges (ESD) or sparking, potentially damaging circuits and increasing the risk of fire or explosion, especially in oxygen-rich environments.
Innovation Solution
A system with electro-mechanical connectors that includes a ground connector, an output power connector, a return power connector, and at least one signal connector, where a current-limiting element is used in the power supply line, and a circuit detects a loopback signal to activate a switch, bypassing the current-limiting element to allow full current and voltage to the output power connector.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Power
If full power is applied immediately upon connection, then the electrical subsystem receives adequate power for operation, but electrostatic discharges or sparking may occur causing circuit damage or fire hazards
Solution Approach 1:
The patent applies preliminary action by first establishing a current-limited power state before enabling full power delivery. The system initially connects with current limiting active to prevent sparking, then transitions to full power mode after confirming safe connection, thus preparing the system in advance to avoid harmful effects.
Solution Approach 2:
The patent implements dynamics by making the power delivery state changeable over time. The system dynamically transitions from a current-limited low-power state to a full-power state based on connection status detection. This dynamic adjustment allows the system to adapt power delivery to safety requirements during different operational phases.
2Object-affected harmful factors
If current limiting is maintained continuously, then sparking is prevented, but the electrical subsystem cannot receive adequate power for normal operation
Solution Approach 1:
The patent applies periodic action by cycling through different power delivery modes based on operational phase. During connection establishment, current limiting is active (safe mode). After loopback detection confirms proper connection, the system transitions to full power mode (operational mode). This periodic switching between safety and performance states resolves the contradiction.
Solution Approach 2:
The patent implements feedback through the loopback signal detection mechanism. The system monitors connection status via loopback signals and uses this feedback to control the transition from current-limited mode to full-power mode. When the loopback signal indicates proper connection, feedback triggers the power mode change, ensuring safety requirements are met before full power delivery.
3Power
If the system transitions from current-limited to full power mode, then adequate power is provided for operation, but the transition itself may cause sparking
Solution Approach 1:
The patent applies preliminary action by maintaining current limiting active during the transition phase. The system prepares for power increase by keeping the current-limited state in place until the loopback signal confirms safe connection conditions. This preliminary safety measure prevents sparking during the critical transition moment.
Solution Approach 2:
The patent uses the current-limiting circuit as an intermediary between the power source and the electrical subsystem during transition. This intermediary component controls the rate of power increase, preventing abrupt transitions that would cause sparking. The current limiter acts as a buffer that mediates the power transfer safely during mode changes.
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
This solution prevents sparks during the connection or disconnection of the electrical subsystem by ensuring a safe, current-limited power state before full power is applied, thereby reducing the risk of electrical damage and fires.
Implementation Method 1
a power supply line in the first electrical system is connected through a current-limiting element to the output power connector
Implementation Method 2
a switch activable in response to a detected loopback signal to bypass the current-limiting element to pass a full unrestrained current and voltage on the power supply line
Data Source
AI summary
A system includes a plurality of electro-mechanical connectors disposed on a first electrical system. The plurality of electro-mechanical connectors includes at least a ground connector, an output power connector, a return power connector, and at least one signal connector. A power supply line in the first electrical system is connected through a current-limiting element to the output power connector. The system further includes a circuit detecting a loopback signal received from a second electrical system via the at least one signal connector indicating presence of a power connection between the first electrical system and the second electrical system, and a switch activable in response to a detected loopback signal to bypass the current-limiting element to pass a full unrestrained current and voltage on the power supply line to the output power connector.