Wireless Power Transmitter Authentication for Non-Intended Object Detection
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Solution Overview
Problem
Existing wireless power transmission systems face challenges in detecting non-intended objects of power reception, particularly in environments with multiple objects, leading to inefficiencies and potential accidents due to power loss or overload.
Innovation Solution
A power transmitter with a method to detect non-intended objects by sensing load changes, determining subscription requests, and monitoring leakage power values, using a controller to manage power transmission and communication with power receivers to ensure valid charging.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If power transmission is performed to multiple objects simultaneously, then power transmission efficiency is improved, but the ability to detect non-intended objects deteriorates
Solution Approach 1:
The patent segments the power transmission process into distinct phases: authentication phase and power transmission phase. During authentication, the system individually verifies each object's validity before power transmission. This segmentation allows the system to maintain high detection accuracy for non-intended objects while still supporting multiple simultaneous power transmissions by processing objects through the authentication filter first.
Solution Approach 2:
The patent implements preliminary authentication and subscription request verification before initiating power transmission to multiple objects. By performing these detection actions in advance, the system identifies and filters out non-intended objects (such as invalid materials or unauthorized receivers) before they can interfere with power transmission, thereby maintaining both multi-object transmission capability and high detection accuracy.
2Difficulty of detecting and measuring
If load change sensing is used to detect objects, then detection capability is improved, but false detection of invalid materials increases
Solution Approach 1:
The patent introduces an intermediary authentication mechanism between load change sensing and power transmission. When load change indicates object presence, the system first requires authentication and subscription requests before enabling power transmission. This intermediary step filters out false detections from invalid materials (which cannot authenticate) while allowing genuine objects to proceed, thereby improving detection reliability without sacrificing detection capability.
Solution Approach 2:
The patent implements feedback mechanisms where the system monitors authentication responses and subscription requests from detected objects. Valid objects provide positive feedback through successful authentication and subscription requests, while invalid materials fail to respond or provide negative feedback. This feedback loop enables the system to distinguish between genuine objects and false detections, improving detection accuracy while maintaining the ability to detect all objects initially.
3Reliability
If power transmission control is optimized for single object, then power transmission reliability is improved, but adaptability to multiple objects deteriorates
Solution Approach 1:
The patent designs a universal power transmission control system that can handle both single-object and multi-object scenarios through the same authentication and subscription request framework. The system maintains reliability by requiring authentication for each object while adapting to multiple objects by processing multiple authentication and subscription sequences simultaneously. This multi-functional approach eliminates the need for separate control mechanisms for single vs. multi-object transmission.
Solution Approach 2:
The patent implements dynamic power transmission control that adapts the number of simultaneous power transmission channels based on the number of authenticated objects. The system dynamically adjusts resource allocation and transmission parameters while maintaining the same reliable authentication-based control framework, enabling seamless transition between single-object and multi-object transmission modes without compromising reliability.
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
The solution effectively identifies and prevents power transmission to non-intended objects, enhancing the safety and efficiency of wireless power transfer to multiple objects by accurately distinguishing valid from invalid receivers.
Implementation Method 1
a system for wirelessly transmitting power, which employs a resonance scheme
Implementation Method 2
Power is transmitted between a primary coil of the power transmitter and a secondary coil of the power receiver
Data Source
AI summary
Methods and apparatus are provided for detecting a non-intended object of power reception by a power transmitter. Power transmission for communication is performed, when the load change is sensed that has a value greater than or equal to a predetermined threshold. It is determined whether a subscription request, for subscribing to a network is received within a predetermined time period. The power transmission for communication is stopped when the subscription request is not received within the predetermined time period. Power is transmitted to a power receiver that has transmitted the subscription request, when the subscription request is received within the predetermined time period. It is determined whether a leakage power value exceeds an allowable range, when the power state report is received from the power receiver. The transmission of the power to the power receiver is stopped, when the leakage power value exceeds the allowable range.