Checkerboard Electrode Vibration Power Generator for Multi-Directional Energy Harvesting
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Solution Overview
Problem
Conventional static induction vibration power generators are limited in their ability to extract electrical energy from external vibrations in multiple directions, leading to reduced electricity generation and increased complexity due to the arrangement of electret electrodes, which results in decreased efficiency and increased manufacturing complexity.
Innovation Solution
A vibration power generator design featuring electrodes arranged in a checkerboard pattern on both substrates, allowing for vibration in both X-axis and Y-axis directions, with distinct spring constants for each axis to prevent displacement in oblique directions, and a larger circumscribed area for the second electrode to maintain constant overlapping area and electricity generation regardless of displacement magnitude.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If electret electrodes are arranged in a two-dimensional array to enable multi-directional vibration extraction, then the ability to utilize external vibrations in multiple directions is improved, but the total area available for electret electrode arrangement is reduced, leading to decreased electricity generation
Solution Approach 1:
The electret electrode is divided into multiple electrode pads arranged in a two-dimensional array, with each pad independently contributing to electricity generation. This segmentation allows the electrode to respond to vibrations from multiple directions while maintaining sufficient total area for effective charge induction.
Solution Approach 2:
The electrode arrangement transitions from a one-dimensional linear array to a two-dimensional grid pattern, enabling the electrode to capture vibrations from both X-axis and Y-axis directions simultaneously, thereby improving multi-directional adaptability without sacrificing total effective area.
2Device complexity
If the variable electrode is moved only in the X-axis direction to simplify the structure, then the structural complexity is reduced, but the ability to extract energy from vibrations in other directions is lost
Solution Approach 1:
The two-dimensional electrode array structure serves multiple functions: it maintains simple fabrication processes while simultaneously enabling energy extraction from vibrations in both X-axis and Y-axis directions, making the device universally responsive to multi-directional external vibrations.
3Productivity
If the overlapping area between electrodes changes with displacement magnitude to maximize energy extraction, then the electricity generation efficiency is improved, but the output becomes unstable under varying vibration conditions
Solution Approach 1:
The spring constants are specifically designed to be different in the X-axis and Y-axis directions, creating anisotropic mechanical properties that constrain the variable electrode's displacement. This parameter optimization ensures the overlapping area remains relatively constant under varying vibration magnitudes, stabilizing the induced charge and power output while maintaining efficient energy extraction.
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 enhances electricity generation efficiency by allowing vibrations in multiple directions without decreasing output, simplifies manufacturing by reducing the number of processes, and stabilizes power output through an integrated electric storage circuit, reducing the need for battery exchanges and promoting resource conservation.
Implementation Method 1
a film retaining electric charges is provided as the first electrode or the second electrode
Implementation Method 2
electric charges are provided to one electrode of a variable capacitance, and the electrode charges are induced to the opposed electrode by a static induction
Implementation Method 3
an elastic structure, which is elastically deformable only in a first-axial direction or a second-axial direction, is connected between the first substrate and the fixation structure
Data Source
AI summary
A vibration power generating device includes a first substrate and a second substrate, a first electrode formed on the first substrate, a fixed structural body, elastic structural bodies which connect the first substrate and the fixed structural body with each other, and a second electrode formed on the second substrate. Since the overlapping area of the electrodes is increased by arranging rectangular or square conductor parts of the first electrode and rectangular or square conductor parts of the second electrode in a checkerboard pattern, a generation region where power is generated by vibration is increased.