RF Power Beam Phasing for Mobile Device Orientation Tracking
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Solution Overview
Problem
Existing wireless power transmission systems face challenges in efficiently delivering power to mobile devices while optimizing energy transfer efficiency, minimizing interference, and ensuring regulatory compliance with varying device positions and orientations, particularly in IoT devices and sensors.
Innovation Solution
A method and system utilizing RF power generating units with sensors and communication channels to adjust RF signal phases based on device position and orientation, incorporating Kalman filters and AI for prediction, and adjusting power levels based on battery status and consumption, ensuring efficient and safe power delivery.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of energy
If RF beam forming and focusing is used to transfer power to a desired location, then energy transfer efficiency is optimized and interference with other devices is avoided, but the system complexity increases due to the need for precise beam control and positioning
Solution Approach 1:
The system continuously receives position and orientation data from sensors in the mobile device and adjusts the RF beam phases in real-time to maintain optimal power transfer. This feedback loop ensures high energy efficiency while automating the complexity of beam control, reducing the burden on manual system management.
Solution Approach 2:
The RF beam forming system dynamically adjusts its phase configuration based on the mobile device's position and orientation changes. This dynamic adaptation allows the system to maintain optimal energy transfer efficiency throughout the charging process, resolving the contradiction between efficiency and complexity through adaptive control.
2Ease of manufacture
If wireless power transmission is used to eliminate wiring during IoT device installation, then ease of installation is improved, but power delivery efficiency may be reduced compared to wired connections
Solution Approach 1:
The system changes the phase parameters of RF signals to create focused beams that maximize power transfer efficiency. By optimizing these parameters dynamically based on device position and orientation, the system achieves high efficiency wireless power transfer that approaches wired connection performance while maintaining installation simplicity.
3Adaptability or versatility
If RF signals are transmitted to track and follow a mobile device, then adaptability to device movement is improved, but interference with other devices and regulatory compliance becomes more challenging
Solution Approach 1:
The system concentrates RF energy into a focused beam directed precisely at the mobile device's location, rather than broadcasting energy in all directions. This localized energy delivery maintains adaptability to device movement while minimizing interference with other devices and reducing electromagnetic exposure to levels that meet regulatory requirements.
4Measurement precision
If sensors and communication channels are added to track device position and orientation, then measurement precision is improved, but device complexity increases
Solution Approach 1:
The mobile device utilizes existing multi-functional sensors (accelerometers, gyroscopes, magnetometers) that serve both navigation/orientation purposes and wireless power reception optimization. This multi-functionality approach improves measurement precision for power tracking without significantly increasing device complexity, as the sensors serve dual purposes.
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
Enhances power delivery efficiency, reduces interference, and maintains regulatory compliance by dynamically adapting to device movements and orientations, optimizing power allocation among multiple devices.
Implementation Method 1
transmitting a first group of RF signals having a first group of phases to a first mobile device
Implementation Method 2
at least one of the sensors is a magnetometer
Implementation Method 3
at least one of the sensors includes a gyroscope
Data Source
AI summary
A method of RF power delivery includes, in part, transmitting a first group of RF signals having a first group of phases to a first mobile device during a first time period. The first mobile device has a first position and a first orientation during the first time period. The method further includes, in part, transmitting a second group of RF signals having a second group of phases to the first mobile device during a second time period. The second group of phases are determined in accordance with a second position and a second orientation of the first mobile device during the second time period. The second position and second orientation are determined using sensors disposed in the first mobile device and transmitted via a wireless communications channel to an RF power generating unit transmitting the first and second group of RF signals.