Wireless Power Transmission Using Beam-Formed RF Waves
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Solution Overview
Problem
Existing wireless power transmission systems lack the ability to safely transmit power to electronic devices without exposing living bodies to harmful electromagnetic waves, particularly when the magnitude of RF waves is high, as they do not effectively determine the presence of living bodies in the vicinity and adjust the transmission conditions accordingly.
Innovation Solution
A wireless power transmission apparatus equipped with patch antennas and a processor that uses stored electromagnetic distribution maps to determine the position of electronic devices and living bodies, adjusting the transmission conditions to ensure that RF waves do not exceed a certain threshold, thereby preventing harm to living bodies by reducing the magnitude or changing the path of the waves.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by moving object
If the magnitude of RF waves is increased for remote power transmission, then the power transmission distance is improved, but harmful electromagnetic waves are applied to living bodies
Solution Approach 1:
The system segments the transmission space by creating multiple beam paths and selectively activating antenna elements to direct power transmission only toward the electronic device while avoiding living body regions. This spatial segmentation allows high-power transmission to the target without exposing living bodies to harmful levels of electromagnetic radiation.
Solution Approach 2:
The system applies different transmission characteristics to different spatial regions: high-power focused beams are directed only at the electronic device location, while regions containing living bodies receive reduced or zero power transmission. This local quality differentiation enables effective power transmission to the target while protecting living bodies from harmful exposure.
2Object-affected harmful factors
If the position of living bodies is detected and transmission conditions are adjusted to prevent exposure, then safety is improved, but the complexity of the system increases
Solution Approach 1:
The antenna system serves multiple functions: it performs both position determination of electronic devices and living bodies, and simultaneously controls beam formation for safe power transmission. By making the antenna system multi-functional, the patent avoids adding separate complex detection and control subsystems, thereby limiting the increase in overall system complexity.
Solution Approach 2:
The system continuously monitors the positions of electronic devices and living bodies, and dynamically adjusts the beam transmission conditions based on this feedback. This real-time feedback mechanism enables automatic safety adjustments without requiring complex manual intervention systems, balancing safety improvements with manageable system 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 system effectively prevents harmful electromagnetic waves from reaching living bodies by determining the presence of both electronic devices and living bodies and adjusting the RF wave transmission conditions, ensuring safe and efficient power transfer to electronic devices.
Implementation Method 1
a plurality of patch antennas configured to form radio-frequency (RF) waves
Implementation Method 2
Each of the plurality of electromagnetic-wave distribution maps may represent the magnitude of an electromagnetic wave at at least one point around the wireless power transmission apparatus
Data Source
AI summary
A wireless power transmission apparatus includes patch antennas which form an RF wave; a memory storing electromagnetic wave distribution maps corresponding to transmission conditions for transmitting the RF wave; and a processor configured to determine a position of an electronic device and a position of a living body, determine a transmission condition which transmits the RF wave which causes an electromagnetic wave having a size not exceeding a first threshold value to be applied to a position of the living body while being beam-formed at a position of the electronic device, using at least a portion of the electromagnetic wave distribution maps, and generate the RF wave with the determined transmission condition using the patch antennas, each electromagnetic wave distribution map indicating the size of electromagnetic waves at one or more points around the wireless power transmission apparatus when the RF wave is formed by each of the transmission conditions.