Piezoelectric Power Generator Using 15-Mode Shear Deformation
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Solution Overview
Problem
Conventional piezoelectric power generators primarily use 31-mode piezoelectric bodies due to manufacturing ease, but these generate significantly less power compared to 15-mode bodies, which are harder to manufacture and offer ten times greater energy potential.
Innovation Solution
A piezoelectric power generator design incorporating 15-mode piezoelectric bodies, featuring a frame, fixing units, vibration units, and elastic units to facilitate shear deformation and vertical vibration, allowing for the generation of electricity from external mechanical energy, with materials like tungsten, gold, or bismuth used for the vibration unit.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If 31-mode piezoelectric body is used, then ease of manufacture is improved, but power generation capability deteriorates
Solution Approach 1:
The patent changes the operational mode parameter of the piezoelectric body from 31-mode to 15-mode. This parameter change enables the piezoelectric body to exhibit shear deformation characteristics under vertical vibration, thereby achieving high power generation capability comparable to conventional 15-mode designs while maintaining manufacturing simplicity through standard piezoelectric body structures.
Solution Approach 2:
The patent introduces a vibration unit that vertically vibrates the piezoelectric body, transforming the static or simple compression scenario into a dynamic shear deformation scenario. This dynamic operation enables the piezoelectric body to function in 15-mode, maximizing power generation from vertical vibrations without requiring complex manufacturing processes.
2Power
If 15-mode piezoelectric body is used, then power generation capability is improved, but manufacturing difficulty increases
Solution Approach 1:
The patent employs vertical vibration of the piezoelectric body through a vibration unit, which dynamically induces shear deformation in the piezoelectric material. This dynamic approach allows standard piezoelectric bodies to operate in 15-mode, achieving high power generation capability without requiring specially manufactured 15-mode piezoelectric bodies that would be difficult to produce.
Solution Approach 2:
The patent changes the operational state of the piezoelectric body from static compression (31-mode) to dynamic shear deformation (15-mode) through vertical vibration. This parameter change in the operational mode, rather than in the manufacturing specifications, enables high power generation while maintaining ease of manufacture.
3Power
If shear strain is required for 15-mode operation, then power generation capability is improved, but device complexity increases
Solution Approach 1:
The patent uses vertical vibration of the piezoelectric body to dynamically generate shear strain during operation. Instead of requiring a complex pre-configured structure to produce shear strain, the system simply vibrates the piezoelectric body vertically, and the shear strain naturally arises from the vibration-induced deformation, maintaining device simplicity while achieving 15-mode power generation.
Solution Approach 2:
The patent directly applies mechanical vibration to the piezoelectric body to induce shear strain. The vibration unit generates vertical vibrations that cause the piezoelectric body to deform in shear, producing electrical energy through the piezoelectric effect. This approach achieves high power generation capability through a simple vibrational mechanism without adding device complexity.
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 design achieves substantial power generation comparable to or exceeding that of 31-mode systems, while maintaining portability, enabling effective emergency power feeding to mobile communication and electronic devices.
Implementation Method 1
When an external mechanical energy (wind, instrumental vibrations, etc.) is applied, the piezoelectric power generator produces power using a piezoelectric effect inducing polarization (electric energy) inside a material.
Implementation Method 2
the 15 mode generates a shear strain (sliding) with the electrical polarization direction in parallel with the mechanical displacement direction
Implementation Method 3
an elastic unit connected to a top part and a bottom part of the vibration unit with one end
Data Source
AI summary
A piezoelectric power generator for feeding emergency power, includes a frame; a fixing unit comprising a left fixing body coupled to an upper left side of the frame and a right fixing body coupled to an upper right part of the frame; a first piezoelectric body bonded to a right side of the left fixing body; a second piezoelectric body bonded to a left side of the right fixing body; and a vibration unit bonded between the first piezoelectric body and the second piezoelectric body and vibrating vertically.