Automatic splicing and positioning system for surface defects of wind power blade

By constructing a brightness-regular pixel structure and a multi-resolution step sequence, the boundaries of brightness abrupt change segments are extracted to form a connected boundary chain, which solves the problem of easy attenuation of feature representation in the automatic splicing and positioning of surface defects of wind turbine blades, and realizes the overall coherence and accuracy of defect location.

CN122367896APending Publication Date: 2026-07-10XINYI HEGOU ZHONGXIN WIND POWER CO LTD
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
XINYI HEGOU ZHONGXIN WIND POWER CO LTD
Filing Date
2026-04-01
Publication Date
2026-07-10

AI Technical Summary

Technical Problem

In existing technologies, under conditions of light drift or texture weakening, the automatic splicing and positioning system for surface defects on wind turbine blades suffers from easy attenuation of feature representation, resulting in unstable correlation between adjacent images, difficulty in maintaining overall continuity of defect locations, unstable boundary morphology, and a lack of holistic regional positioning.

Method used

By constructing a brightness-regular pixel structure, establishing a multi-resolution step sequence, extracting the boundaries of brightness abrupt change segments, forming a connected boundary chain, the closed range of the defect area is filled, and the boundary chain is maintained during cross-segment inspection, thus completing the full-segment splicing and positioning of surface defects on wind turbine blades.

Benefits of technology

This improves the structural stability and positional reliability of wind turbine blade surface defect identification, ensures the overall coherence of defect locations and the continuous characteristics of boundaries, and enhances the integrity and accuracy of splicing.

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Abstract

This invention relates to the field of image analysis technology, specifically to an automatic splicing and localization system for surface defects on wind turbine blades. The system includes analyzing inspection sequences to achieve brightness regularization and obtain fragment distribution; distinguishing abrupt changes in fragments through resolution step comparison to obtain a step sequence; extracting boundary chains based on the connectivity of abrupt fragments; generating a defect framework based on the closure relationship of the boundary chains; and combining the time series and flight path segment numbers to form cross-segment orientation to complete the defect splicing and localization result. This invention compresses illumination differences by constructing a brightness-regularized pixel structure, forms a hierarchical structure of abrupt changes by establishing a resolution step sequence, strengthens contour orientation by generating connectivity boundary chains, defines the defect region by forming a closed coordinate framework, and forms a continuous layout by maintaining cross-segment boundary connections. This promotes fragment brightness regularization, abrupt structure segmentation, continuous boundary orientation, consistent region definition, and cross-segment defect coherence, thereby improving the structural stability and positional reliability of defect identification.
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