RF Wireless Charging via Phase Compensation
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Solution Overview
Problem
Existing wireless charging technologies face challenges in achieving focused electromagnetic power delivery in complex and time-varying environments, leading to inefficient energy transfer and electromagnetic pollution, especially for devices implanted in the body or in hard-to-reach locations.
Innovation Solution
A focused wireless charging method using radio frequency receiving and phase compensation retransmission, where the external charger system transmits a test signal, measures phase delays, and adjusts the phase of charging signals to ensure in-phase stacking at the receiving antenna, allowing for efficient and directional energy transfer without prior knowledge of the device's location.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of energy
If non focused radio wave is emitted by wireless charging equipment, then the coverage area is large, but most electromagnetic wave energy cannot be received by the battery and becomes invalid radiation, resulting in energy waste and electromagnetic pollution
Solution Approach 1:
The patent applies local quality by making different parts of the electromagnetic field have different properties - the radio waves are made focused and concentrated specifically at the location of the battery to be charged, while other areas receive minimal or no electromagnetic energy. This is achieved through phase compensation and amplitude adjustment of signals from multiple antennas, creating a localized high-energy region only where needed.
Solution Approach 2:
The patent employs feedback mechanisms where the system continuously monitors the position of the battery and the propagation environment, then adjusts the phase and amplitude of radio waves from multiple antennas in real-time. This feedback loop ensures that the electromagnetic focus remains accurately targeted on the battery despite movements or environmental changes, preventing energy waste and electromagnetic pollution in surrounding areas.
2Productivity
If the wireless charging equipment attempts to focus electromagnetic waves in complex or unknown and time-varying inhomogeneous propagation environment, then the energy transmission efficiency improves, but the difficulty of achieving accurate focusing increases due to unpredictable propagation conditions
Solution Approach 1:
The patent uses feedback by continuously monitoring the propagation environment and battery position, then adjusting the phase and amplitude of signals from multiple antennas in real-time. This allows the system to adapt to complex and time-varying conditions, maintaining accurate electromagnetic focusing despite environmental uncertainties or body movements.
Solution Approach 2:
The patent performs preliminary actions by pre-calculating and storing phase compensation values for different positions and environmental conditions. When the battery is located, the system can quickly retrieve and apply the appropriate phase compensation parameters without complex real-time calculations, simplifying the control process while maintaining focusing accuracy in complex environments.
3Measurement precision
If the position of the battery to be charged is not precisely located, then the electromagnetic focused area cannot be determined, but searching and locating the battery consumes additional time and energy
Solution Approach 1:
The patent introduces an intermediary signal transmission mechanism where the charging equipment emits a test signal that the battery receives and returns. By analyzing the returned signal's phase and timing information, the system can precisely determine the battery's position without requiring complex imaging or scanning procedures, thus achieving accurate localization efficiently.
Solution Approach 2:
The system uses feedback from the battery's response signal to determine its position. The battery receives a test signal and returns a signal that contains information about its location. By analyzing this feedback signal's phase and time characteristics, the system can quickly and accurately locate the battery, enabling precise focusing without time-consuming searches.
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 method enables precise and efficient energy transfer with reduced radiation to the human body, is insensitive to external interference, and maintains high energy transmission efficiency even in complex environments, minimizing electromagnetic pollution.
Implementation Method 1
Based on the propagation phase delay data received by the multiple antennas system of external charger from the same frequency signal transmitted by the embedded rechargeable battery, the external system transmits charging signal to the embedded system with the same frequency. Via the phase compensation when transmitting, focused electromagnetic field could be formed at the receiving antenna of the embedded system
Implementation Method 2
a rechargeable battery in an embedded system and an external system. Based on the propagation phase delay data received by the multiple antennas system of external charger from the same frequency signal transmitted by the embedded rechargeable battery, the external system transmits charging signal to the embedded system
Implementation Method 3
Based on the propagation phase delay data received by the multiple antennas system of external charger from the same frequency signal transmitted by the embedded rechargeable battery
Implementation Method 4
realizing in-phase stacking and the focus of field, and realizing effectively wireless charging to the embedded system
Data Source
AI summary
Embodiments provide focused wireless charging method and apparatus based on radio frequency receiving and phase compensation retransmission. The method is based on the reciprocity principle, making each charging signal transmitted by the external charging system could stack in-phase when arriving at the embedded rechargeable battery, realizing wireless near field focusing in any given area in an unknown complex inhomogeneous propagation environment and a high charging efficiency. The focused wireless charging technology based on radio frequency receiving and phase compensation retransmission in embodiments could realize in-phase stacking and precise focus of each wireless charging signal of the external system on the embedded batteries to be charged automatically under different propagation environment, different environment medium, and possible random offset of the rechargeable battery. This method has strong environmental adaptability, high energy transmission efficiency, transmission stability, less radiation to human body and no need of accurate information of the location of charging equipment.