Rail-Guided Aircraft Surface Scanning for Correlated Defect Detection
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Solution Overview
Problem
Existing methods for inspecting the surface quality of aircraft or spacecraft fuselages, particularly riveted joints, are complex, manual, and result in large volumes of image data that are difficult to evaluate, leading to ambiguity in identifying shape deviations.
Innovation Solution
A system comprising a carriage with a guide device and drive mechanism that moves along a rail, equipped with a surface scanning device and a processing unit, allowing automated, precise, and correlated inspection of surface characteristics, enabling efficient detection and documentation of defects.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If surface scanning devices are used to examine surface sections, then measurement precision is improved, but device complexity increases and productivity decreases due to manual movement requirements
Solution Approach 1:
The fuselage surface is divided into multiple surface sections, each examined by the scanning device at discrete positions. The carriage system segments the inspection process into manageable sections along the guide axis, allowing systematic coverage of the entire surface while maintaining precision at each segment.
Solution Approach 2:
Manual movement of the scanning device is replaced by an automated carriage system that travels along a rail. The carriage is positioned automatically using a guide device and drive mechanism, eliminating manual intervention and significantly increasing inspection productivity while maintaining measurement precision.
2Measurement precision
If surface scanning devices are used to examine surface sections, then measurement precision is improved, but device complexity increases due to manual movement requirements
Solution Approach 1:
The carriage system serves multiple functions: it supports the scanning device, provides automated positioning along the rail, and enables systematic movement between surface sections. This multi-functional design reduces the need for separate positioning mechanisms, thereby managing device complexity while improving precision.
Solution Approach 2:
The carriage acts as an intermediary between the scanning device and the fuselage surface. It provides a stable mounting platform and controlled movement mechanism, simplifying the overall system architecture by separating the scanning function from the positioning function.
3Measurement precision
If large volumes of image information are recorded, then measurement precision is improved, but loss of information increases due to difficulty in evaluation and unambiguous assignment
Solution Approach 1:
The system correlates scanning results with the position of the carriage along the guide axis. This positional feedback allows precise assignment of image data to specific surface sections, eliminating ambiguity in data evaluation and maintaining measurement precision even with large volumes of information.
Solution Approach 2:
The carriage position is tracked and recorded before and during the scanning process. This preliminary positioning information is stored alongside the image data, enabling straightforward correlation and evaluation without subsequent ambiguity about which surface section each image represents.
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
Facilitates rapid, systematic, and transparent detection of surface defects, reducing manual effort and improving data management by correlating inspection results with precise positional data, supporting automated quality control throughout the production chain.
Implementation Method 1
at least one surface scanning device (30) that is arranged on the holding frame (24) and is designed to detect a characteristic of the surface and to identify shape deviation points by comparison with a predetermined characteristic
Data Source
Figure 1~2
Figure 3~4
AI summary
A system for inspecting the surface of an aircraft or spacecraft is proposed, comprising at least one carriage with a guide device that is movably mounted in a rail that can be held on the surface of the aircraft or spacecraft along a guide axis, a first drive device that is coupled to the carriage and is configured to engage in the rail and move the carriage along the rail as required, a retaining frame arranged on the carriage that extends transversely to the guide axis and is spaced apart from the guide device, at least one surface scanning device that is arranged on the retaining frame and is configured to detect a characteristic of the surface and to identify areas of form deviation by comparison with a predetermined characteristic, and a processing unit.which is coupled to the first drive unit and the surface scanning device and is designed to control the first drive unit to move the carriage along an area of the surface, to control the surface scanning device to scan the surface along the area of the surface, and to detect identified form deviation points by the surface scanning device and to output them correlated with an associated position of the guide device on the rail and/or to transfer them to a data carrier.