Electrostatic Generator Layer Structure for Stable Vibration Harvesting
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Solution Overview
Problem
Existing energy harvesting systems for vibrations, such as those in structures and moving bodies, face challenges in achieving high power-generating performance and stability during repetitive use, particularly due to inefficiencies in power generation and the need for large electricity quantities for charging processes.
Innovation Solution
The system incorporates a plurality of electrodes and intermediate layers, including those that can be elongated, compressed, or both in non-parallel directions, to effectively convert external forces into electrical energy, with specific materials and treatments enhancing deformability and power generation efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Power
If conventional electrostatic induction systems with flexible electrodes and electret dielectric are used, then the system can convert vibration energy to electric energy, but the power-generating performance is insufficient and stability during repetitive use deteriorates
Solution Approach 1:
The intermediate layer is divided into multiple segments (first intermediate layer, second intermediate layer, third intermediate layer) with different deformation characteristics. Each segment responds to different components of the applied force, allowing the system to harvest energy more effectively from complex vibration patterns while maintaining stability through distributed deformation.
Solution Approach 2:
The system uses a composite structure combining multiple intermediate layers with different material properties (elongation vs. compression resistance). This composite approach allows each layer to contribute its specific deformation characteristic, improving overall power generation while the combination provides enhanced stability during repetitive use.
2Power
If a single type of intermediate layer is used, then the structure is simple, but the power generation efficiency is insufficient to meet high performance requirements
Solution Approach 1:
The intermediate layer is segmented into multiple functional layers, each with specific deformation characteristics. This segmentation enables the system to capture energy from different aspects of the applied force, significantly improving power generation efficiency while the modular nature of the segmentation keeps the structure manageable.
Solution Approach 2:
Different regions of the intermediate layer structure are assigned different properties (elongation-capable vs. compression-resistant). This local differentiation allows each part to optimize its response to specific force components, maximizing overall power generation efficiency without requiring complete structural redesign.
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 configuration achieves high power-generating performance and excellent stability to repetitive use by efficiently converting external forces into electrical energy, with improved durability and power generation efficiency compared to previous systems.
Implementation Method 1
an intermediate layer that can be elongated and deformed in a direction that is not parallel to a direction in which an external force is applied, when the external force is applied to the intermediate layer
Implementation Method 2
a system utilizing electrostatic induction
Data Source
Figure 1A~1B
Figure 2A~2B
Figure 2C~2D
AI summary
An element (1) including: electrodes (11, 21); and intermediate layers (2, 3), each being sandwiched between any pair of the electrodes, wherein the intermediate layers include at least two selected from the group consisting of: intermediate layer (2) that can be elongated and deformed in direction not parallel to direction in which external force is applied, when the external force is applied to the intermediate layer (2); intermediate layer (3) that can be compressed and deformed in direction parallel to direction in which external force is applied, when the external force is applied to the intermediate layer (3); and intermediate layer that can be elongated and deformed in direction not parallel to direction in which external force is applied, and can be compressed and deformed in direction parallel to the direction in which the external force is applied, when the external force is applied to the intermediate layer (2, 3).