Portable Intermittent Fault Detector Thermal and Mechanical Design
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Solution Overview
Problem
Conventional methods for detecting intermittent faults in complex electrical systems, such as those in aircraft, are ineffective due to their random nature and the impracticality of using oscilloscopes for systems with multiple circuits, while existing portable diagnostic systems face issues with temperature management, noise generation, and mechanical failure.
Innovation Solution
A portable diagnostic system with passive heat dissipation using a thermally conductive chassis, a switchable power supply for constant voltage, minimized noise-generating components, and a robust test module assembly that absorbs forces to protect delicate electronic components.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If serial test methods are used to detect intermittent faults, then the testing process is simple and stable, but the detection capability for random intermittent faults is extremely low
Solution Approach 1:
The diagnostic system performs continuous periodic monitoring of all circuits simultaneously, checking for intermittent faults at regular intervals rather than relying on single-point-in-time serial testing. This periodic action increases the probability of capturing random intermittent faults while maintaining systematic testing efficiency.
Solution Approach 2:
The system continuously monitors all circuits without interruption, ensuring that intermittent faults are detected as soon as they occur. This continuous action eliminates the gaps inherent in serial testing methods, where circuits are checked one at a time, thereby improving both detection reliability and overall testing efficiency.
2Measurement precision
If oscilloscopes are used to detect intermittent faults, then detection accuracy is improved, but the system becomes impractical for complex electrical systems with multiple circuits
Solution Approach 1:
The diagnostic system divides the complex electrical system into multiple independently monitorable circuits, each with its own detection channel. This segmentation allows simultaneous monitoring of numerous circuits without requiring a single complex oscilloscope, thereby maintaining detection accuracy while reducing overall system complexity and improving scalability.
Solution Approach 2:
The diagnostic system is designed to universally interface with complex electrical systems containing hundreds or thousands of circuits and connection points. By creating a multi-functional system that can simultaneously monitor multiple circuits rather than requiring separate oscilloscope connections for each circuit, the system achieves both accuracy and practicality.
3Weight of moving object
If portable diagnostic systems are made compact, then portability is improved, but temperature management and noise control become problematic
Solution Approach 1:
The patent extracts the power supply and major heat-generating components from the main portable diagnostic unit and places them in separate external modules. This extraction allows the main device to remain compact and portable while the external modules handle thermal management, solving the contradiction between portability and heat dissipation.
Solution Approach 2:
The patent introduces external power supply modules and passive heat dissipation structures as intermediary components between the portable diagnostic system and the environment. These intermediaries manage heat and power separately, allowing the main device to remain portable while thermal management functions are performed by dedicated external components.
4Weight of moving object
If portable diagnostic systems are made compact, then portability is improved, but mechanical failure rates increase during transport
Solution Approach 1:
The patent implements shock-absorbing mounting structures and protective cushioning materials within the portable device housing. These beforehand cushioning measures protect delicate electronic components and connectors from mechanical failure during transport, allowing the device to remain portable while maintaining mechanical durability.
Solution Approach 2:
The patent applies different structural qualities to different parts of the portable device. Critical components receive enhanced protective mounting and cushioning, while less sensitive areas have simpler structures. This localized quality approach maintains portability while protecting vulnerable components from mechanical failure during transport.
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 efficiently detects intermittent faults, manages heat and noise, and withstands mechanical stress, providing reliable fault detection in complex electrical systems with reduced costs and improved durability.
Implementation Method 1
passive heat dissipation using a thermally conductive chassis
Data Source
AI summary
A portable intermittent fault detector includes an enclosure that carries electronics and a display. The electronics are selected, arranged, and connected in a manner that minimizes noise, including noise that could interfere with an ability of the portable intermittent fault detector to detect intermittent faults in complex electrical systems. The portable intermittent fault detector also includes a passive heat management system hat conveys heat away from the electronics. In addition, a test module assembly of the portable intermittent fault detector includes an inner assembly with test module boards that are rigidly secured to one another and an outer support that carries the inner assembly in a manner that absorbs impacts and other forces on the portable intermittent fault detector.