RF Wireless Power Tracking for Moving Security Cameras
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Solution Overview
Problem
Conventional wireless charging systems are inefficient and cumbersome, requiring devices to be placed at specific positions and limiting mobility, with inductive coupling having a short range and necessitating multiple charging cables and outlets, thus being time-consuming and burdensome.
Innovation Solution
A wireless power transmission method that uses a transmitter to determine the location of a receiver through communication signals and transmit RF power waves forming constructive and destructive interference patterns, creating a pocket of energy for the receiver to harvest power while allowing flexibility in device placement.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If inductive coupling is used for wireless charging, then power can be transmitted wirelessly, but the charging range is limited and devices must be placed at specific positions
Solution Approach 1:
The patent employs phased array antenna technology that dynamically adjusts the transmission of RF power waves based on receiver location. The system continuously tracks and follows the receiver as it moves, dynamically reforming the energy pocket to maintain optimal charging conditions regardless of position within the extended transmission area
Solution Approach 2:
The system transitions from traditional planar inductive coupling to three-dimensional RF power transmission using phased arrays. This enables power delivery throughout a volumetric space rather than requiring contact with a flat charging surface, significantly expanding the effective charging dimension and range
2Device complexity
If conventional wireless charging systems are used, then devices can be charged wirelessly, but multiple charging cables and outlets are required
Solution Approach 1:
The patent implements a universal RF power transmission system that can charge multiple devices simultaneously without requiring separate charging cables or outlets. The phased array technology enables one transmitter to serve multiple receivers across a large area, making the charging infrastructure universal and eliminating the need for numerous charging components
Solution Approach 2:
The system merges multiple charging functions into a single wireless transmission platform. Instead of requiring separate charging cables for each device, the RF power transmission system combines power delivery to multiple devices through a unified electromagnetic field, reducing the number of charging components needed
3Loss of time
If devices are charged using conventional methods, then power can be delivered, but the process is time-consuming and interrupts device usage
Solution Approach 1:
The patent enables continuous power transmission to moving devices without interruption. The phased array system continuously tracks and follows the receiver as it moves, maintaining uninterrupted power delivery throughout the charging process, eliminating the need to stop or reposition devices
Solution Approach 2:
The system performs preliminary tracking and positioning of the receiver before power transmission begins. The phased array anticipates receiver movement and pre-adjusts the beam direction and focus, ensuring continuous optimal power delivery without interruption or delay
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
Enables efficient and flexible wireless power delivery to electronic devices, eliminating the need for specific device positioning and multiple charging cables, allowing for continuous use during charging and increased mobility.
Implementation Method 1
transmitting, by antennas of the wireless power transmitter, radio frequency (RF) power transmission waves
Implementation Method 2
the RF power transmission waves converging to form controlled constructive interference patterns and destructive interference patterns
Implementation Method 3
receiving, by a communications radio of a wireless power transmitter, a communication signal from a communications radio of a wireless power receiver
Data Source
AI summary
An example system includes a wireless-power transmitter configured to emit a first set of one or more radio frequency (RB signals and a security camera coupled to a wireless-power receiver. The wireless-power receiver is configured to receive the first set of one or more RF signals. The security camera includes at least one component for converting energy from the first set of one or more RF signals into usable power to power the security camera. The usable power is a primary source of power for the security camera. The example system can also include a processor in communication with the wireless-power transmitter configured to, in accordance with a determination that the security camera has moved relative to the wireless-power transmitter, adjust the wireless-power transmitter to emit a second set of one or more RF signals from the wireless-power transmitter to continue providing usable power to the security camera.