Wind Turbine Blade Defect Detection Through Rolling Tactile Sensing

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Solution Overview

Problem

Existing methods and tools for detecting defects underneath the outer protection layer of wind turbine generator blades are either complex, require sophisticated equipment, or fail to effectively identify voids or air pockets, especially when a thicker protective layer like thermoplastic polyurethane is present.

Innovation Solution

A defect detection tool with a rotatable tool tip, such as a disc or ball, is guided over the outer protection layer to sense feedback values, allowing for the detection of potential defects by sensing deviations in uniformity, without lateral movement, and providing precise feedback on voids or air pockets.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Measurement precision

If sophisticated inspection equipment is used to detect defects underneath the protection layer, then measurement precision is improved, but device complexity increases

Engineering Contradiction:

Improvedefect detection precisionVSAvoidinspection equipment complexity

Core Design Contradiction:

Measurement precisionVSDevice complexity

Solution Approach 1:

The patent replaces complex mechanical inspection equipment with a simple tactile sensing tool that uses human touch to detect defects. The tool tip interacts mechanically with the protection layer surface, and human operators sense deviations through touch, substituting sophisticated electronic sensors with a straightforward mechanical-tactile system that achieves comparable detection precision.

Inventive Principle:

Principle #28Mechanics substitution (Replace mechanical system)

Solution Approach 2:

The inspection method leverages the natural tactile sensitivity of human operators to detect defects. The tool is designed to be operated manually, allowing human sensory capabilities to serve as the detection mechanism, thereby eliminating the need for complex automated sensing equipment while maintaining effective defect detection.

Inventive Principle:

Principle #25Self-service

2Strength

If a thicker protection layer is applied to protect the blade, then strength is improved, but difficulty of detecting and measuring defects increases

Engineering Contradiction:

Improveprotection layer strengthVSAvoiddefect detection difficulty

Core Design Contradiction:

StrengthVSDifficulty of detecting and measuring

Solution Approach 1:

The inspection tool is designed with specific geometric features (tool tip shape, contact area) that are optimized beforehand to effectively penetrate and sense through the thicker protection layer. The tool's mechanical design预先 considers the thickness of the protection layer, allowing it to detect subsurface defects even when buried under thicker protective material that would obscure them from visual or simpler inspection methods.

Inventive Principle:

Principle #10Preliminary action

3Ease of operation

If a simple detection tool is used to inspect the blade, then ease of operation is improved, but measurement precision deteriorates

Engineering Contradiction:

Improvetool operation simplicityVSAvoiddefect detection precision

Core Design Contradiction:

Ease of operationVSMeasurement precision

Solution Approach 1:

The tool features a localized, highly sensitive contact area (tool tip) that concentrates the interaction with the protection layer at a specific point. This local quality enhancement at the contact interface allows the simple tool to achieve precise defect detection through focused mechanical interaction, while the rest of the tool remains simple and easy to operate.

Inventive Principle:

Principle #3Local quality

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

The method and tool enable simple, quick, and cost-effective detection of defects under the protective layer, reducing the risk of delamination and extending the blade's lifespan by identifying voids without complex equipment and environmental additives.

Implementation Method 1

the tool tip being formed by a disc, a rim or a ball rotatably supported in relation to the tool base such that when the defect detection tool is being guided over the outer protection layer in the tool movement direction and biased in a tool biasing direction against the surface of the outer protection layer then the tool tip rolls on the surface of the outer protection layer

Methodology Applied

Scientific EffectRolling: Roller

Data Source

PatentUS12492681B2Method and tool for detecting defects on a wind turbine generator blade

Publication Date: 2025.12.09 VESTAS WIND SYSTEMS AS

AI summary

In order to provide an improved and cost-efficient method and tool for performing a defect detection procedure aiming at the detection of a defect underneath an outer protection layer covering the leading edge of a wind turbine generator blade a method is described during which a tool tip is being biased against the surface of the outer protection layer while being guided over the outer protection layer and deviations in the uniformity of the at least one feedback value are sensed to identify potential defects. A tool and a detection unit suitable for the described method is also described.