Flexible Eddy Current Sensor Array for Complex Part Inspection
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Solution Overview
Problem
Existing eddy current inspection methods for detecting flaws in complex, contoured parts like aircraft engine components are inefficient due to the need for close proximity and complex manipulators, leading to incomplete coverage and potential missed critical defects.
Innovation Solution
A multi-dimensional array of flexible eddy current sensors conforming to the three-dimensional shape of parts, electronically scanned by a controller and analyzed by a processor for comprehensive inspection, ensuring uniform contact and full coverage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If traditional eddy current probes are used to inspect complex contoured parts, then inspection capability is provided, but inspection coverage is incomplete and inspection time is excessive
Solution Approach 1:
The inspection system divides the contoured part into multiple discrete inspection zones, with each zone monitored by dedicated sensors in the array. This segmentation allows parallel inspection of multiple zones simultaneously, reducing total inspection time while ensuring complete coverage of the complex geometry
Solution Approach 2:
The patent transitions from traditional single-point or linear scanning to a two-dimensional array of sensors that can be conformally mounted on the part surface. This dimensional expansion enables simultaneous multi-point inspection across the entire contoured surface, dramatically improving both productivity and coverage reliability
2Measurement precision
If eddy current probes are positioned close to the part surface for inspection, then detection precision is improved, but device complexity increases due to need for complex manipulators
Solution Approach 1:
The patent replaces complex mechanical manipulators with an electronically controllable sensor array. The electronic scanning system uses electrical switching to sequentially activate different sensor elements, eliminating the need for mechanical positioning devices while maintaining close proximity to the part surface for high detection precision
Solution Approach 2:
The sensor array provides multi-functional capability by using the same physical sensors for both positioning and detection. The electronic scanning mechanism allows a single array to inspect various zones of the contoured part without requiring separate manipulators for each location, reducing overall system complexity
3Productivity
If spot checking is performed on complex parts, then inspection speed is increased, but critical defects may be missed
Solution Approach 1:
The system performs preliminary conformal mounting of the complete sensor array on the part surface before inspection begins. This preliminary action ensures that all inspection zones are pre-positioned and ready for simultaneous activation, enabling comprehensive coverage at high speed without missing critical defects
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 approach enables efficient and comprehensive inspection of complex surfaces, reducing rework and false calls, improving first-time yield, and providing cost-effective full coverage for both new and in-service parts.
Implementation Method 1
The inspection system includes a multi-dimensional array of eddy current sensors that conforms to a contour of a three dimensional shape of the part
Implementation Method 2
a controller coupled to the multi-dimensional array, wherein the controller is configured to electronically scan the part by sequentially connecting sensors in the array to an eddy current instrument
Data Source
AI summary
An inspection system for inspecting a part is provided. The inspection system includes a multi-dimensional array of eddy current sensors that conforms to a contour of a three dimensional shape of the part. The inspection system also includes a controller coupled to the multi-dimensional array, wherein the controller is configured to electronically scan the part via an electrical connection of the eddy current sensors to an eddy current instrument. The inspection system further includes a processor coupled to the eddy current instrument, wherein the processor is configured to analyze output from the eddy current instrument and the controller to accomplish inspection of the part.