Electret Power Generating Element Multi-Directional Vibration Energy Harvesting
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Conventional power generating elements using electrets have low power generation efficiency due to limited directional movement of electrodes, which restricts the utilization of vibration energy.
Innovation Solution
A power generating element with a displacement member and a fixed member, where an electret material layer is formed on one surface and a counter electrode layer on the opposing surface, allowing for displacement in multiple directions (X, Y, Z axes) due to elastic deformation, thereby fluctuating the inter-layer distance and enhancing energy conversion.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If the electrode is constrained to move only in a predetermined direction or plane, then the structure is simple and easy to manufacture, but the power generation efficiency is low due to limited utilization of vibration energy
Solution Approach 1:
The invention transitions from one-dimensional linear movement to three-dimensional spherical movement by adding radial and tangential movement capabilities to the electrode. This allows the electrode to respond to vibrations from any direction in space, converting vibrational energy more effectively while maintaining a relatively simple spherical structure that is feasible to manufacture.
Solution Approach 2:
The invention introduces a spring mechanism that enables the electrode to dynamically adjust its position and orientation in response to external vibrations. The spring allows the electrode to move radially and tangentially, creating a dynamic system that adapts to varying vibration directions and intensities, thereby improving power generation efficiency.
2Productivity
If the electrode moves in multiple directions to capture more vibration energy, then the power generation efficiency increases, but the device complexity increases
Solution Approach 1:
The spherical geometry of the electrode inherently provides multi-directional movement capability without requiring complex mechanical linkages. By moving from a linear to a spherical configuration, the system gains radial and tangential movement degrees of freedom while maintaining structural simplicity, thus improving power generation efficiency without proportionally increasing device complexity.
Solution Approach 2:
The invention changes the fundamental geometric parameter of the electrode from a linear segment to a spherical shape. This parameter change enables the electrode to utilize vibrations from multiple directions simultaneously, improving power generation efficiency while the spherical symmetry actually reduces the number of distinct structural components needed compared to a multi-axis linear system.
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 design increases power generation efficiency by allowing the element to harness vibration energy in multiple directions, leading to improved energy conversion and increased power output compared to previous electret-based systems.
Implementation Method 1
an elastic deformation body; When vibration energy is given to the power generating element, the displacement member is displaced with respect to the fixed member such that an inter-layer distance between the electret material layer and the counter electrode layer fluctuates according to deformation of the elastic deformation body
Implementation Method 2
An electret material layer is formed on a surface of one of the displacement member and the fixed member. A counter electrode layer opposed to the electret material layer is formed on another surface. When vibration energy is given to the power generating element, the displacement member is displaced with respect to the fixed member such that an inter-layer distance between the electret material layer and the counter electrode layer fluctuates
Data Source
AI summary
Provided is a power generating element and a power generating device capable of using vibration energy not used for power generation in the past. The power generating element includes a displacement member, a fixed member, and an elastic deformation body. An electret material layer is formed on a surface of one of the displacement member and the fixed member. A counter electrode layer opposed to the electret material layer is formed on the other surface. When vibration energy is given to the power generating element, the displacement member is displaced with respect to the fixed member such that an inter-layer distance between the electret material layer and the counter electrode layer fluctuates according to deformation of the elastic deformation body.