Optical Projection System for Wind Turbine Blade Layup Alignment
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Solution Overview
Problem
The traditional layup process for wind turbine blades is prone to reinforcement layer dislocation, core shifts, and unwanted gaps, which compromise the structural integrity of the blade, leading to increased production cycle times and quality issues due to the lack of accurate measurement and specification techniques.
Innovation Solution
An optical (laser) projection system is used to optimize the glass/core kitting process by calibrating 3D models and updating kitting patterns based on actual mold conditions, ensuring precise alignment and placement of core panels, thereby closing the loop on quality control and reducing the number of iterations required.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If traditional CAD-based kitting patterns are used, then material can be cut and prepared for layup, but the patterns deviate from actual mold parts requiring multiple iterative revisions that extend production cycle time
Solution Approach 1:
The patent replaces manual measurement and iterative CAD pattern revision with an optical projection system that directly projects laser lines onto the mold surface. This allows operators to visually identify gaps and misalignments in real-time during layup, eliminating the need for multiple iterative pattern revisions and significantly reducing production cycle time.
Solution Approach 2:
The optical projection system provides real-time visual feedback by projecting laser lines that represent the ideal panel edges and contours. Operators can immediately see deviations between actual material placement and the projected guide lines, allowing for instant correction without waiting for post-layout measurement and pattern revision cycles.
2Measurement precision
If manual measurement techniques are used to detect gaps and deviations, then quality control can be performed, but the process is time-consuming and lacks precision
Solution Approach 1:
The patent replaces manual measurement tools (tape measures, calipers) with an optical projection system that uses laser lines to define precise reference geometries. The system provides visual indication of gaps and deviations by showing the space between projected laser lines and actual material edges, enabling rapid and precise measurement without physical contact tools.
Solution Approach 2:
The optical projection system creates a visual copy of the ideal panel geometry by projecting laser lines that represent the exact contours and edges that should be achieved. This optical copy serves as a real-time reference against which actual material placement can be compared, providing precise measurement guidance without requiring physical measurement tools.
3Ease of operation
If reinforcement layers and core material are cut into smaller pieces for transportation, then material handling is facilitated, but poor kit design increases the risk of core gaps and quality issues
Solution Approach 1:
The optical projection system provides real-time visual feedback during the layup process, allowing operators to immediately identify and correct gaps between core panels and reinforcement layers. This continuous monitoring ensures that even when materials are cut into smaller transportable pieces, the final assembly maintains proper alignment and eliminates gaps that would compromise structural integrity.
Solution Approach 2:
The system enables operators to self-correct placement errors by providing visual guidance through projected laser lines. Operators can independently verify panel alignment and adjust positioning without requiring supervision or rework, ensuring that modular kits are assembled with proper fit and finish.
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 significantly reduces production cycle time, minimizes quality issues, and ensures accurate panel placement, leading to a more efficient and precise manufacturing process with improved structural integrity of wind turbine blades.
Implementation Method 1
an optical (e.g. laser) projection system is used to optimize the glass/core kitting process
Data Source
AI summary
A method to design the kits and layup the reinforcement layers and core using projection system, comprising a mold having a contoured surface; a layup projection generator which: defines a plurality of mold sections; identifies the dimensions and location for a plurality of layup segments. A model-based calibration method for alignment of laser projection system is provided in which mold features are drawn digitally, incorporated into the plug(s) which form the wind turbine blade mold, and transferred into the mold. The mold also includes reflective targets which are keyed to the molded geometry wherein their position is calculated from the 3D model. This method ensures the precision level required from projection system to effectively assist with fabrication of wind turbine blades. In this method, digital location of reflectors is utilized to compensate for the mold deformations.