Wireless Power Transmission Device Authentication Negotiation
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Solution Overview
Problem
In wireless power transmission systems, when multiple power transmission devices have overlapping communication ranges, there is a risk of inefficient power transmission to a third power reception device that is not intended to receive power from a second power transmission device, leading to incorrect authentication and power transmission settings.
Innovation Solution
A power transmission device sets a second power reception device as a target for power transmission only if it receives a notification signal with predetermined information modulated onto the electromagnetic waves, ensuring accurate negotiation and preventing incorrect power transmission to devices outside its range.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If multiple power transmission devices operate with overlapping communication ranges, then power transmission capability is improved, but communication interference and incorrect authentication occur
Solution Approach 1:
The system performs detecting power transmission before authentication to preliminarily identify power reception devices within the power transmission range. This preliminary detection establishes a basis for subsequent authentication, ensuring that only devices within the actual power transmission range are authenticated, thus preventing incorrect authentication while maintaining multi-device operation capability
Solution Approach 2:
The power transmission device monitors communication signals and detects when a power reception device is attempting authentication with an incorrect transmission device. Based on this feedback, the system can identify and prevent incorrect authentication attempts, ensuring that authentication only succeeds when the power reception device is within the correct power transmission range
2Measurement precision
If a power transmission device performs detecting power transmission, then accurate power reception device detection is achieved, but power transmission efficiency decreases
Solution Approach 1:
The system performs detecting power transmission periodically or intermittently rather than continuously. This periodic detection allows the system to maintain accurate detection capability while minimizing the time spent in detection mode, thereby improving overall power transmission efficiency. The detection can be triggered by specific events such as when a power reception device enters the communication range or when authentication is required
3Adaptability or versatility
If the second power transmission device establishes communication connection with the third power reception device, then communication capability is improved, but power transmission efficiency deteriorates
Solution Approach 1:
The system performs preliminary detection through detecting power transmission before establishing communication connections for authentication. This preliminary action identifies which power reception devices are actually within the power transmission range, allowing the power transmission device to avoid establishing communication connections with devices outside its range, thus preventing energy waste while maintaining communication capability with valid targets
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 reduces the likelihood of erroneous communication connections and power transmission to devices outside the intended power transmission range, thereby preventing inefficient power consumption and ensuring accurate wireless power transmission.
Implementation Method 1
power transmission, using electromagnetic waves modulated to transmit the predetermined information
Implementation Method 2
the power transmission device detects the power reception device present in a power transmittable range through detecting power transmission
Data Source
AI summary
A power transmission device sets, as a target of power transmission, a second power reception device that has transmitted a notification signal including predetermined information while power transmission, using electromagnetic waves modulated to transmit the predetermined information, is being performed to a first power reception device, where the setting the second power reception device as a target of the power transmission performed is performed depending on a result of a negotiation with the second power reception device.