Aircraft Pressurized Fluid Leak Detection via Dual Pressure Channels
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Solution Overview
Problem
Existing leak detection systems in pressurized fluid systems, particularly in the aerospace industry, are inadequate in accurately distinguishing between primary and secondary fluid leaks and fail to provide timely engine control measures.
Innovation Solution
A leak detection system that monitors detection volume pressure changes to differentiate between primary and secondary fluid leaks by using pressure thresholds and outputs dual primary-secondary fluid leak signals, with an engine control module to manage engine operations based on these signals.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a leak detection system monitors pressure changes to detect fluid leaks, then leak detection capability is provided, but the system cannot accurately distinguish between primary and secondary fluid leaks
Solution Approach 1:
The leak detection system is segmented into multiple independent detection channels: a primary leak detection channel that monitors for primary fluid leaks, and a secondary leak detection channel that monitors for secondary fluid leaks. Each channel has its own pressure sensor and evaluation logic, allowing the system to independently detect and differentiate between primary and secondary leak types without cross-interference, thereby resolving the inability to distinguish leak types while maintaining detection accuracy
Solution Approach 2:
The patent introduces an intermediary component (the secondary fluid system with its own pressurization and detection mechanisms) that acts as a mediator between the primary fluid system and the detection system. This intermediary layer allows the detection system to indirectly monitor primary system integrity while directly monitoring secondary system integrity, enabling differentiation between leak types through the distinct behavior of each detection channel
2Reliability
If existing leak detection systems detect fluid leaks, then leak detection is provided, but timely engine control measures are not implemented
Solution Approach 1:
The control system is programmed with pre-established response protocols that are automatically executed upon detection of specific leak patterns. When the evaluation unit identifies a primary leak, secondary leak, or combined leak condition, the corresponding pre-programmed control actions (such as engine shutdown, fuel flow restriction, or alert generation) are immediately implemented without delay for manual intervention or additional analysis, thereby eliminating response time loss while ensuring reliable safety measures
Solution Approach 2:
The system implements a closed-loop feedback mechanism where the leak detection results are continuously fed back to the engine control unit, which automatically adjusts engine operation parameters or initiates shutdown procedures based on the detected leak conditions. This real-time feedback loop ensures that control measures are timely and proportionate to the detected threat level, improving both response time and overall system reliability
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
Enhances leak detection accuracy by identifying multiple leak types and enables appropriate engine control actions, ensuring safe and efficient operation of pressurized fluid systems.
Implementation Method 1
a pressure sensor disposed in operative communication with the housing to sense a pressure within the detection volume
Data Source
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AI summary
In accordance with at least one aspect of this disclosure, a fluid system (200) of an aircraft includes a primary fluid conduit (201) that conveys a primary fluid, and a leak detection system (250) disposed around at least a portion of the primary fluid conduit (201) and forming one or more detection volumes (251a). The leak detection system (250) determines whether there is a primary fluid leak into the one or more detection volumes (251a) by sensing a pressure change in the one or more detection volumes (251a).