Wireless Power Antenna Spatial Distribution Management
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Solution Overview
Problem
Current wireless power transfer systems face challenges in safely and efficiently managing radiative electromagnetic field spatial distributions to avoid exposing objects, such as humans or animals, to undesired power densities while maintaining effective power transfer to target devices.
Innovation Solution
A system that includes an antenna capable of implementing multiple selectable radiative electromagnetic field spatial distributions with defined bounding surfaces for power density, a sensor circuit to detect objects within these fields, and a countermeasure circuit to adjust the power distribution by selecting alternative radiative field configurations that keep objects outside the hazardous zones while ensuring continuous power transfer to the target device.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a single radiative electromagnetic field spatial distribution is used for wireless power transfer, then power transfer efficiency is maximized, but safety cannot be ensured when objects enter the power transfer zone
Solution Approach 1:
The patent implements dynamic switching between multiple radiative electromagnetic field spatial distributions based on real-time object detection. The system transitions from a static single field configuration to a dynamic multi-configuration system that adapts to environmental conditions, ensuring safety while maintaining power transfer capability
Solution Approach 2:
The system changes physical parameters of the radiative electromagnetic field by selecting different spatial distributions with varying bounding surfaces and power density characteristics. This allows the system to adjust field parameters to exclude detected objects from hazardous zones while maintaining power transfer to target devices
2Object-affected harmful factors
If multiple radiative electromagnetic field spatial distributions are implemented to ensure safety, then object protection is improved, but system complexity increases
Solution Approach 1:
The patent segments the radiative electromagnetic field into multiple selectable spatial distributions, each with defined bounding surfaces. This segmentation allows the system to divide the power transfer environment into distinct zones and select appropriate configurations based on object presence, managing complexity through structured field division
Solution Approach 2:
The system implements feedback through sensor circuits that detect objects within bounding surfaces and trigger countermeasure circuits to switch between field configurations. This closed-loop feedback mechanism automates the safety response, reducing operational complexity while maintaining protective capabilities
3Reliability
If the radiative electromagnetic field configuration is adjusted in response to detected objects, then safety is maintained, but power transfer efficiency may be reduced
Solution Approach 1:
The system dynamically selects from multiple pre-configured radiative electromagnetic field spatial distributions based on real-time object detection. By having multiple optimized configurations available, the system can switch to an appropriate field pattern that maintains both safety requirements and power transfer efficiency rather than using a single fixed configuration
Solution Approach 2:
The system changes field parameters by selecting different spatial distributions that have varying characteristics. Some configurations may prioritize efficiency for clear paths, while others prioritize safety exclusions, allowing the system to optimize the balance between safety and efficiency based on environmental conditions
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
This approach ensures safe operation by maintaining power density within safety limits around objects and optimizing power transfer efficiency by dynamically adjusting radiative field configurations in response to detected objects, thereby preventing exposure to harmful electromagnetic radiation.
Implementation Method 1
an antenna configured to implement at least two selectable radiative electromagnetic field spatial distributions
Implementation Method 2
a sensor circuit configured to detect a presence of an object within the bounding surface of the selected radiative electromagnetic field spatial distribution
Data Source
AI summary
Described embodiments include a system and method. An antenna is configured to implement at least two selectable radiative electromagnetic field spatial distributions. Each selectable radiative electromagnetic field spatial distributions respectively has a bounding surface that describes a specified power density in the radiative electromagnetic field. A sensor circuit is configured to detect a presence of an object within the bounding surface of an implemented radiative electromagnetic field. A countermeasure circuit is configured to select a response to the detected presence of the object within the bounding surface of the implemented radiative electromagnetic field. A spatial distribution selector circuit is configured to select from the at least two selectable radiative electromagnetic field spatial distributions another radiative electromagnetic field spatial distribution (i) that includes a target device present within the bounding surface of the selected radiative electromagnetic field and (ii) that implements the selected response to the detected presence of the object.