Self-Powered Wearable Device Using Kinetic Energy Harvesting
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Solution Overview
Problem
Wearable electronic devices face limitations in functionality and battery life due to size and power constraints, often using low-power displays and simplistic designs, which hinder the integration of advanced technologies.
Innovation Solution
A self-powered wearable electronic device incorporating a rechargeable battery and an automatic power generation system that converts kinetic energy from user movement into electrical energy using a micro generator with a permanent magnet rotor and coil, allowing for efficient charging and extended usage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If advanced technologies (high-resolution displays, high performance processors, large capacity memories) are integrated into wearable devices, then functionality and performance are improved, but device size, weight, and battery consumption increase
Solution Approach 1:
The wearable device incorporates a power generation module that automatically generates electricity from the user's wrist movements. The module includes a magnet, coil, and magnetic shield arranged to convert kinetic energy into electrical energy during arm swinging, enabling the device to charge itself without external intervention or additional battery weight
2Adaptability or versatility
If advanced technologies are integrated into wearable devices, then functionality is improved, but battery life is limited due to increased power consumption
Solution Approach 1:
The power generation module continuously converts the kinetic energy from normal wrist movements into electrical energy, automatically recharging the battery during daily use. This self-charging mechanism offsets the high power consumption of advanced components, extending operational duration without requiring larger batteries
Solution Approach 2:
The patent transforms the physical state of energy by converting mechanical kinetic energy from arm movements into electrical energy through electromagnetic induction. This parameter transformation creates a sustainable energy supply that matches the high consumption demands of advanced functional components
3Adaptability or versatility
If advanced technologies are integrated into wearable devices, then performance is improved, but device size becomes large and bulky
Solution Approach 1:
The power generation module employs a compact nested structure where the magnetic shield surrounds the magnet, and the coil is wound around the magnet assembly. This nested arrangement minimizes the volume occupied by the power generation components while maintaining full functionality, allowing integration into wearable form factors
Solution Approach 2:
The magnetic shield uses a thin-walled cylindrical structure that provides necessary magnetic field containment while occupying minimal space. This thin-film approach allows the power generation module to maintain a compact profile suitable for wearable devices with strict size constraints
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 solution enables automatic, quick, and effective charging of the battery, ensuring prolonged device operation while saving energy and reducing environmental impact, with a compact and user-friendly design.
Implementation Method 1
The automatic power generation device includes a swing lump, an automatic power generation gear driving device, and a micro generator. The micro generator includes a permanent magnet rotor, a stator, and a coil which is set on the stator. When the swing lump swings, the automatic power generation gear driving device is driven by the swing lump and swings together. The automatic power generation gear driving device drives the permanent magnet rotor of the micro generator to rotate, thus, cutting magnetic field lines to generate power for automatically charging the rechargeable battery.
Data Source
AI summary
A self-powered wearable electronic device comprises a rechargeable battery and an automatic power generation device adapted to automatically charge the rechargeable battery. The automatic power generation device comprises a swing lump, an automatic power generation gear driving device, and a micro generator. The micro generator is connected to the rechargeable battery and comprises a permanent magnet rotor, a stator, and a coil which is set on the stator. The permanent magnet rotor comprises a driving gear. The swing lump is fixed with an automatic power generation gear. The automatic power generation gear is meshed with the automatic power generation gear driving device, and the automatic power generation gear driving device is meshed with the driving gear of the permanent magnet rotor.