RF Wireless Power Transmitter with Camera-Based Object Detection
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Solution Overview
Problem
Conventional wireless charging systems are limited in transmitting energy over meaningful distances and lack the capability to dynamically track and manage electronic devices in three-dimensional spaces, failing to adapt to user mobility and regulatory safety standards for EMF exposure.
Innovation Solution
The system employs a combination of sensors and cameras to identify and map objects within the transmission field, adjusting power wave characteristics to form energy pockets at specific locations, ensuring safe and efficient energy transfer while avoiding sensitive objects and adhering to EMF exposure limits.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Power
If wireless power transmission is extended to meaningful distances, then power transmission capability is improved, but EMF exposure risk increases
Solution Approach 1:
The system creates localized energy pockets at specific transmission points rather than broadcasting power uniformly throughout the transmission field. This concentrates power delivery where needed while limiting EMF exposure in surrounding areas, resolving the contradiction between extended transmission capability and reduced EMF risk.
Solution Approach 2:
The system continuously monitors the transmission field for living beings and sensitive objects using sensors and cameras, then dynamically adjusts power wave transmission in real-time. This feedback mechanism ensures power is transmitted effectively over extended distances while automatically reducing or redirecting transmission when living beings are detected, thereby managing EMF exposure risk.
2Area of stationary object
If the transmission field covers large three-dimensional spaces, then device coverage area is improved, but difficulty in tracking and identifying devices increases
Solution Approach 1:
The system employs multiple types of sensors and cameras that serve dual purposes: they map the three-dimensional transmission field geometry and simultaneously detect and track electronic devices. This multi-functional approach enables large coverage area while maintaining effective device identification and tracking capabilities.
Solution Approach 2:
The system replaces manual or simple proximity-based device detection with sophisticated sensor arrays and camera systems that automatically map the transmission field and identify devices through electromagnetic and optical sensing. This substitution enables effective tracking across large three-dimensional spaces without increasing operational complexity.
3Reliability
If power waves are transmitted continuously to maintain charging, then power delivery reliability is improved, but energy consumption increases
Solution Approach 1:
Instead of continuous power wave transmission, the system employs periodic transmission cycles with active charging phases and monitoring phases. During monitoring phases, the system detects device presence and positioning, then activates power transmission only when devices are properly positioned in energy pockets. This periodic approach maintains reliable power delivery while significantly reducing overall energy consumption compared to continuous transmission.
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 dynamic and safe wireless power transmission in three-dimensional spaces, ensuring efficient energy transfer to devices while protecting humans and sensitive objects from excessive EMF exposure, adapting to changing environments and user mobility.
Implementation Method 1
transmitting, by a transmitter, power waves that converge to form constructive interference at a location associated with a receiver
Implementation Method 2
generating, by at least one thermal imaging camera in communication with the transmitter, a thermal image of at least a portion of a transmission field of the transmitter
Data Source
AI summary
Systems and methods for wireless power transmission based on object identification are provided. A radio frequency wireless power transmitter is in communication with a video camera for capturing image data (e.g., a series of image frames) of at least a portion of a transmission field of the radio frequency wireless power transmitter. One or more processors of the radio frequency wireless power transmitter are configured to (i) detect motion of an object towards the transmission field by applying motion tracking analysis on the series of image frames; and (ii) cause adjustments to transmission of one or more radio frequency power transmission waves by the radio frequency wireless power transmitter to a receiving electronic device based on the motion of the object. The receiving electronic device uses the one or more radio frequency power transmission waves to power or to charge a power source used by the receiving electronic device.