Wireless Power Transmission Using Electromagnetic Time Reversal
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Solution Overview
Problem
Current wireless power transmission systems are inadequate for monitoring vial temperatures within a lyophilization chamber due to the need for power transfer in an electromagnetically challenging environment, limiting focused power distribution at multiple positions.
Innovation Solution
A method utilizing electromagnetic time reversal (EMTR) and statistical electromagnetism to generate focused wireless power transmission by creating a map of electromagnetic fingerprints, transmitting pre-matched signals, measuring spatial correlations, and evaluating power focus at multiple locations within the chamber.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If wireless sensors are deployed to monitor vial temperatures at multiple locations within the chamber, then measurement precision is improved, but the electromagnetic environment becomes more challenging for power transfer
Solution Approach 1:
The system performs preliminary electromagnetic fingerprint mapping at N locations before actual power transmission. This pre-characterization of the electromagnetic environment allows the system to plan and execute focused power delivery while avoiding interference with sensor operations, resolving the contradiction between measurement precision and electromagnetic compatibility
Solution Approach 2:
The system implements location-specific electromagnetic fingerprints and tailored pre-matched signals for each of the N locations within the chamber. This localized approach allows optimized power delivery to each sensor position while minimizing electromagnetic interference, enabling both precise temperature monitoring and reliable power transfer
2Productivity
If focused power distribution is implemented at multiple positions within the chamber, then energy delivery efficiency is improved, but system complexity increases
Solution Approach 1:
The system pre-characterizes the electromagnetic environment by mapping fingerprints at N locations before power transmission. This preliminary action creates a database that simplifies subsequent focused power delivery operations, allowing efficient energy distribution to multiple positions without requiring complex real-time calculations during actual power transfer
Solution Approach 2:
The system uses pre-matched signals that are derived from the electromagnetic fingerprints obtained during the mapping phase. These copied and adapted signals enable focused power delivery at multiple locations using a relatively simple transmitter, avoiding the need for complex multi-element phased arrays while maintaining high energy delivery efficiency
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
Achieves temporal and spatial focusing of electromagnetic power, enhancing energy delivery efficiency and maintaining product integrity during lyophilization by compressing energy at specific locations within the chamber.
Implementation Method 1
A method utilizing electromagnetic time reversal (EMTR) and statistical electromagnetism to generate focused wireless power transmission
Data Source
AI summary
A method of focused wireless power transmission is disclosed which includes generating a map for electromagnetic fingerprints at N locations within an environment of interest, including a transmitter and plurality of receivers each located at one of the N locations, transmitting pre-matched signals based on the electromagnetic fingerprints in a predetermined order for a first location of the N location, measuring response at each of the N locations, measuring spatial correlations between all other locations and the first location, and evaluating electromagnetic power focus at each of the N locations by comparing the measured spatial correlations.