Deformation Detection Tool for Aircraft Pin Joints
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Solution Overview
Problem
In the aerospace industry, particularly in aircraft landing gear, permanent deformation of pin joints due to overload is difficult to detect visually, leading to potential undetected failures.
Innovation Solution
A tool with a straight edge and LED light source is used to illuminate the space between the pin joint and the straight edge, facilitating visual inspection of deformation by highlighting any gaps caused by bending.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If visual inspection is used to detect deformation of pin joints, then the inspection method is simple and quick, but the detection precision is insufficient for small deformations
Solution Approach 1:
A straight edge is introduced as an intermediary reference object between the light source and the pin joint surface. This straight edge creates a visible gap when the pin joint deforms, serving as a mediator that amplifies the deformation signal for easier detection without requiring complex measurement equipment.
Solution Approach 2:
The inspection method utilizes optical illumination to create visual contrast changes. When light passes through the gap between the straight edge and the deformed pin joint surface, it creates a visible illuminated region that contrasts with the dark background, making small deformations detectable through optical rather than mechanical means.
2Illumination intensity
If the inspection tool includes illumination means, then the visibility of deformation gaps is improved, but the device complexity increases
Solution Approach 1:
The light source is merged with or mounted directly onto the straight edge component itself, rather than being a separate auxiliary device. This integration combines the reference edge and illumination functions into a single unified tool element, improving gap visibility while minimizing the increase in overall device complexity.
3Ease of operation
If the pin joint is inspected without internal support, then the inspection process is simpler, but the tool stability is poor in confined spaces
Solution Approach 1:
A spring mechanism is incorporated to provide dynamic, self-adjusting support for the straight edge. The spring allows the straight edge to be biased against the pin joint surface with consistent force, maintaining tool stability and proper positioning within the confined pin joint space without requiring complex external support structures.
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 method allows for quicker and more accurate detection of permanent deformation in pin joints, enhancing safety checks and preventing unexpected failures.
Implementation Method 1
a light source arranged to illuminate any space present between the straight element and the first straight edge of the first body element
Data Source
AI summary
A tool for detecting deformation of a nominally straight element includes a first body element having first straight edge, means for biasing the first straight edge against the straight element, and a light source arranged to illuminate any space present between the straight element and the first straight edge of the first body element.