Backscatter Imaging for Corrosion Detection in Hidden Components
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Solution Overview
Problem
Conventional non-destructive inspection techniques, such as radiography, require access to both sides of a structural component to detect corrosion, which is not feasible for components hidden from view, leading to costly disassembly and downtime.
Innovation Solution
A method and system utilizing backscattered radiation, specifically x-rays, to visualize corrosion effects by interrogating a workpiece from one side, generating a backscatter image, and comparing it with metal loss indicators to estimate corrosion severity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If conventional radiography is used to inspect structural components, then corrosion detection capability is improved, but access to both sides of the component is required which increases device complexity and inspection time
Solution Approach 1:
The patent inverts the conventional radiography approach by using backscattered radiation that returns to the same side from which the x-ray source emanates. This allows inspection of hidden structural components from a single accessible side, eliminating the need to access both sides of the component while maintaining corrosion detection capability
Solution Approach 2:
The patent introduces backscattered radiation as an intermediary mechanism that enables information transfer about internal corrosion conditions without requiring direct access to the opposite side of the component. The backscattered photons carry information about material density variations caused by corrosion
2Ease of operation
If structural assembly is disassembled for inspection of hidden components, then inspection accessibility is improved, but downtime and expense increase
Solution Approach 1:
The patent replaces the mechanical disassembly approach with a non-destructive backscatter radiography method. Instead of physically separating components to access hidden areas, the system uses x-ray backscattering physics to obtain inspection data through intact structures, eliminating disassembly time and associated expenses
3Device complexity
If backscattered radiation is used for inspection, then access requirement is reduced to one side, but measurement precision for corrosion detection must be maintained
Solution Approach 1:
The patent employs parameter changes in the backscatter imaging system, including adjusting x-ray energy levels, optimizing detector sensitivity, and modifying image processing parameters to enhance the precision of corrosion detection. The system correlates backscatter intensity variations with metal loss indicators to achieve accurate corrosion assessment
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 non-destructive inspection of hidden structural components without disassembly, allowing for timely and orderly evaluation and repair, reducing downtime and maintenance costs.
Implementation Method 1
A backscatter imaging system is provided that includes an x-ray source configured to interrogate a workpiece and generate a backscatter image of the workpiece based upon radiation backscattered from the workpiece
Data Source
AI summary
A method and system for visualizing the effects of corrosion are provided. In the context of a method, a workpiece is interrogated with radiation, such as by interrogating the workpiece with x-ray radiation. By relying upon a radiographic technique, the workpiece may be hidden and may be interrogated without disassembly. The method generates a backscatter image of the workpiece based upon radiation backscattered from the workpiece. The method also compares one or more regions of the backscatter image of the workpiece with respect to backscatter images of different metal loss indicators. Each metal loss indicator is representative of a different amount of metal loss. As a result of the comparison, the method estimates the metal loss attributable to corrosion of the workpiece.