Hexagonal Transducer Mesh for Continuous Structural Defect Detection
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Solution Overview
Problem
Current methods for detecting structural defects in aeronautical structures rely on periodic human inspections, which can lead to safety risks and unnecessary maintenance costs due to the lack of continuous monitoring and the need for preventive replacement of components, often without ensuring 100% structural integrity.
Innovation Solution
A method using a network of transducers, including ultrasonic and optical sensors, to detect and locate defects in aeronautical structures by analyzing excitation and reception signals without requiring a reference state, allowing for continuous monitoring and precise identification of defect locations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If periodic manual inspection methods are used, then device complexity is reduced, but reliability of defect detection deteriorates due to lack of continuous monitoring and human error
Solution Approach 1:
The structure monitors itself through integrated transducers that continuously detect defects without requiring external manual inspection. The transducers embedded in the structure enable autonomous health monitoring, eliminating dependence on periodic human operators and improving detection reliability.
Solution Approach 2:
Manual inspection processes are replaced with automated electronic transducer-based detection systems. The mechanical/human inspection method is substituted with electronic signal transmission and analysis, enabling continuous automated monitoring while maintaining manageable system complexity through standardized sensor integration.
2Reliability
If continuous monitoring with transducers is implemented, then reliability of defect detection improves, but loss of time for data processing and analysis increases
Solution Approach 1:
Reference signals representing healthy structure behavior are pre-established and stored in a database before actual monitoring begins. During operation, incoming transducer signals are directly compared against these pre-defined reference patterns, enabling rapid automated defect detection without requiring time-consuming real-time analysis of normal behavior patterns.
Solution Approach 2:
The system implements automated feedback loops where transducer signals are continuously compared with reference signals, and defect conditions are automatically identified and reported. This closed-loop approach eliminates manual data processing delays and provides real-time structural health assessment.
3Measurement precision
If reference-based comparison method is used, then measurement precision improves, but adaptability to varying operational conditions deteriorates
Solution Approach 1:
The system accommodates varying operational conditions by adjusting comparison parameters and reference patterns based on actual operating conditions. Transducer signals are evaluated with consideration for thermal states and operational variations, allowing the detection system to maintain precision across different environmental and operational scenarios without requiring identical reference conditions.
4Reliability
If preventive replacement of components is performed, then reliability is maintained, but loss of time for aircraft downtime increases
Solution Approach 1:
The system detects defects at early stages through continuous monitoring, enabling timely intervention before components fail. By identifying issues proactively during operation rather than waiting for periodic inspections or catastrophic failure, the system allows for planned maintenance during convenient time windows, minimizing aircraft downtime while maintaining structural 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
Enables continuous structural health monitoring, reducing aircraft downtime by predicting repairs and ensuring only necessary components are replaced, thereby enhancing safety and reducing maintenance costs.
Implementation Method 1
a plurality of transducers (100), in particular ultrasonic transducers
Implementation Method 2
each first transducer (E) emits an excitation signal and each second transducer (R) acquires a reception signal
Data Source
Figure 1~2
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AI summary
The invention concerns a device for detecting defects in a structure (STR), the device comprising a processing unit and a plurality of transducers (100) intended to be positioned on or in the structure (STR), - first transducers (E) of the plurality of transducers (100) being capable of being in a transmitting mode, - second transducers (R) of the plurality of transducers (100) being capable of being in a receiving mode, characterised in that the first transducers (E) form a hexagonal meshing so as to delimit, between them, a plurality of mesh units that border each other, the second transducers (R) being arranged on respective transmission circles of the first transducers (E), each transmission circle of a first transducer (E) being centred on the first transducer (E).