Nickel Alloy Micro-Windmills for Wind Pressure Resistance
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Solution Overview
Problem
Current micro-windmills are fragile, not optimized for wind pressure, and unsuitable for small-scale energy harvesting due to brittle materials and limited actuation by airflow, making them unreliable for applications like remote sensors and small-scale energy generation.
Innovation Solution
Micro-systems with micro-windmills fabricated using non-brittle nickel alloys through monolithic electroplating techniques, enabling robustness, reduced wind resistance, and integration with electronic devices for self-powering, with features like small size, high efficiency, and redundancy in arrays.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If micro-windmills are made from brittle materials like polysilicon and silicon dioxide, then they can be fabricated using standard MEMS processes, but they become fragile and cannot withstand wind pressure
Solution Approach 1:
The patent changes the material parameter from brittle polysilicon/silicon dioxide to ductile nickel alloy, fundamentally altering the mechanical properties while maintaining compatibility with electroplating fabrication processes. This material substitution resolves the contradiction by providing both manufacturability and wind pressure resistance.
Solution Approach 2:
The patent employs nickel alloy as a composite material that combines the benefits of ductility, strength, and compatibility with electroplating processes. The alloy composition is specifically selected to provide both ease of manufacture through electroplating and sufficient strength to withstand wind pressures.
2Ease of manufacture
If micro-windmills are vertically oriented, then they can be fabricated easily, but they are not robust under wind pressure
Solution Approach 1:
The patent inverts the conventional vertical orientation by implementing a horizontal orientation for the micro-windmills. This inversion allows the windmill blades to be perpendicular to the wind flow, maximizing the capture of wind energy and improving robustness under wind pressure while maintaining fabrication simplicity through planar electroplating processes.
3Volume of moving object
If micro-windmills are made small for small-scale use, then they can be used in houses, buildings, and remote sensors, but they become too fragile to survive under wind pressure
Solution Approach 1:
The patent changes the material parameter from brittle to ductile nickel alloy, which fundamentally alters the strength-to-size ratio. This material substitution enables small-scale micro-windmills to withstand wind pressures that would otherwise cause failure, resolving the contradiction between miniaturization and structural survival.
4Productivity
If batch processes are used to make micro-windmills on large surfaces, then unit cost is reduced, but manufacturing complexity increases
Solution Approach 1:
The patent merges multiple individual micro-windmill fabrication processes into a single batch electroplating process that can produce thousands of micro-windmills simultaneously on a large substrate. This consolidation reduces unit cost while the standardized batch process actually simplifies overall manufacturing complexity compared to individual fabrication.
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 micro-windmills are robust, efficient, and cost-effective, capable of withstanding wind pressures and environmental conditions, suitable for various applications including energy harvesting and integration with remote sensors, while reducing unit costs through batch processing.
Implementation Method 1
formed from non-brittle material such as nickel alloys using monolithic electroplating fabrication techniques
Data Source
AI summary
Micro-windmills, micro-systems including micro-windmills, and methods of forming the same are described. The micro-systems with a micro-windmill are configured to withstand wind pressures and environmental conditions and can be used for various applications.