RF Power Detector for Wireless Charging Safety Verification
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Solution Overview
Problem
Conventional wireless power transfer systems require bulky and expensive measurement equipment to verify power levels and beam profiles, necessitating specialized expertise and being inaccessible to end users for efficient and safe operation.
Innovation Solution
A compact RF power detector incorporating an antenna, narrow-band RF power converter, accelerometer, magnetometer, and gyroscope to detect and convert RF signals into DC signals, providing information on power, orientation, and position, which can be integrated into mobile devices for display or transmission, enabling user-friendly power mapping and regulatory compliance without expensive equipment.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If specialty precision RF and microwave measurement equipment is used to verify power levels and beam profiles, then measurement precision is improved, but device complexity and cost increase significantly
Solution Approach 1:
The patent combines multiple measurement functions (power detection, orientation sensing via accelerometer, location tracking via magnetometer) into a single integrated detector unit. This merging eliminates the need for separate bulky measurement equipment while maintaining measurement capabilities, directly resolving the contradiction between measurement precision and device complexity
Solution Approach 2:
The detector is designed to perform multiple functions: detecting RF power levels, determining orientation through accelerometers, and establishing location via magnetometers. This multi-functional design replaces multiple specialized instruments with a single universal device, reducing complexity while preserving measurement accuracy
2Measurement precision
If specialty precision measurement equipment is used, then measurement precision is improved, but ease of operation deteriorates due to requiring specialized expertise
Solution Approach 1:
The detector automatically performs measurements and processes data without requiring user intervention or specialized knowledge. The device self-calibrates and self-measures power levels, orientation, and location, then presents results in an easily interpretable format, enabling end-users to operate the system without expert training
Solution Approach 2:
The patent replaces complex mechanical measurement systems with electronic and software-based solutions. The detector uses electronic sensors and digital processing to perform measurements that previously required sophisticated mechanical equipment and expert operation, thereby simplifying user interaction while maintaining precision
3Measurement precision
If conventional measurement equipment is used, then measurement precision is improved, but loss of time increases due to setup and operation complexity
Solution Approach 1:
The detector is pre-configured with all necessary sensing capabilities (RF detection, accelerometer, magnetometer) and processing algorithms before deployment. This preliminary integration eliminates time-consuming setup procedures required by conventional equipment, allowing immediate measurement execution while maintaining precision
Solution Approach 2:
The patent replaces time-intensive mechanical measurement procedures with rapid electronic detection and digital processing. The electronic system instantly captures and processes measurement data without the manual setup and adjustment time required by traditional mechanical equipment, significantly reducing measurement execution time
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 users to quickly and efficiently verify wireless power delivery, optimize charging locations, and ensure safe exposure levels by providing detailed power maps and real-time feedback, reducing the need for specialized equipment and expertise.
Implementation Method 1
an antenna adapted to receive an RF signal
Implementation Method 2
a narrow-band RF power converter adapted to convert the RF signal to a DC signal
Data Source
AI summary
An RF power system, includes, in part, a power generating and a controller. The power generating unit, includes, in part, a first power detector adapted to detect a first amount of RF power radiated by the RF power generating unit and reflected off a living organism. The controller is adapted to reduce the radiated RF power if the first amount of RF power reflected by the living organism is detected as being greater than a predefined amount. The power generating unit may further include a Doppler radar to detect the living organism. The RF power system may further include a power recovery unit that, in turn, includes a second power detector adapted to detect a second amount of RF power radiated by the RF power generating unit and reflected off the living organism.