Wind Turbine Blade X-Ray Inspection for In-Service Defect Detection
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Large structures like wind turbine blades are difficult to inspect for defects due to their size and operational constraints, with existing technologies only capable of pre-installation defect detection, not post-installation inspection.
Innovation Solution
A defect inspection system using an X-ray generator and detector, where the X-ray generator and detector are transported by means such as drones or rails, with a control unit managing their movement and output to detect and determine defects in large structures, including wind turbine blades, by capturing and analyzing X-ray images and calculating defect depth using specific formulas.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If manual inspection methods are used for large structures like wind turbine blades, then inspection can be performed before installation, but post-installation defect detection becomes impossible due to inaccessibility and operational constraints
Solution Approach 1:
The patent introduces an X-ray inspection system as an intermediary technology that enables non-contact defect detection. The system uses X-ray generators and detectors that can be positioned remotely (on ground or on drones) to inspect blades while rotating, eliminating the need for direct manual access to hard-to-reach areas during operation
Solution Approach 2:
The patent replaces manual mechanical inspection methods with an automated X-ray imaging system. Instead of inspectors physically accessing and examining blade components, the system uses X-ray radiation to penetrate and image the blade structure, automatically detecting defects without human intervention in dangerous or inaccessible locations
2Productivity
If the blade rotates at high speed for power generation, then energy production increases, but defect inspection becomes difficult or impossible during operation
Solution Approach 1:
The patent adapts the inspection system to work with the dynamic rotating operation of the blade. The X-ray system is configured to inspect the blade while it rotates at operational speeds, capturing images at different rotational positions to detect defects without stopping the blade, thus maintaining both productivity and reliability
Solution Approach 2:
The system performs preliminary defect detection by capturing X-ray images at multiple positions during rotation. By collecting data throughout the rotational cycle, the system can identify defects before they lead to failure, enabling proactive maintenance while the blade continues to generate energy
3Reliability
If the X-ray generator and detector are positioned to inspect the entire blade structure, then comprehensive defect coverage is achieved, but the complexity of transporting and positioning both components increases
Solution Approach 1:
The patent designs the transporting means to perform multiple functions: it can transport both the X-ray generator and detector, position them at various locations along the blade, and support different inspection configurations. This universal transporting system reduces overall complexity by consolidating multiple functions into a single platform
Solution Approach 2:
The system uses multiple X-ray generators and detectors that can be positioned at different locations along the blade. By distributing the inspection components, the system achieves comprehensive coverage without requiring a single complex positioning mechanism, as each component can be independently transported and positioned
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 effective detection and depth calculation of defects in large structures like wind turbine blades during post-installation operations, improving maintenance efficiency and safety by providing a method for continuous inspection.
Implementation Method 1
an X-ray generator that generates X-ray to be irradiated to a structure, and an X-ray detector that detects the X-ray generated by the X-ray generator and transmitted through the structure
Data Source
AI summary
A method of detecting a defect in a wind turbine blade uses a system that includes an X-ray generator, moved by a first transporting means, that generates X-ray to be irradiated to the wind turbine blade; an X-ray detector, moved by a second transporting means, that detects the X-ray generated by the X-ray generator and transmitted through the wind turbine blade; and a control unit. To detect a defect, the control unit divides virtually the wind turbine blade into a plurality of lengthwise sections based on a thickness profile thereof, receives a location of the X-ray generator, and controls output of the X-ray generator based on the location of the X-ray generator relative to the plurality of lengthwise sections. In particular, the output of the X-ray generator is decreased for a section among the plurality of lengthwise sections that is farther from a hub of the wind turbine blade.