Wireless Power Transmission Authentication via Intermittent Detection
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Solution Overview
Problem
In wireless power transmission systems, there is a challenge in accurately detecting and authenticating power reception apparatuses to prevent unnecessary power transmission to objects that only pass through the transmission area, leading to inefficient energy use.
Innovation Solution
A power transmission apparatus with a detection unit that intermittently transmits power for detection and an authentication unit that authenticates the object at multiple instances within a predetermined period, ensuring only authorized devices receive power, using communication standards like Bluetooth Low Energy for secure communication.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the power transmission apparatus continuously transmits power for detection, then the detection coverage is improved, but unnecessary power transmission to passing objects increases energy waste
Solution Approach 1:
The power transmission apparatus performs intermittent power transmission for detection at predetermined intervals rather than continuous transmission. The detection unit transmits power periodically, and the authentication unit checks for the presence of power reception apparatus at each interval. This periodic detection approach maintains detection capability while significantly reducing unnecessary power transmission to objects that merely pass through the transmission area without intending to receive power.
2Reliability
If authentication is performed at multiple instances during a predetermined period, then false detection of passing objects is reduced, but the authentication process time increases
Solution Approach 1:
The system performs preliminary authentication checks at multiple instances during a predetermined period before initiating full power transmission. By conducting authentication at predetermined intervals (first instance, second instance, etc.), the system can identify and filter out passing objects that do not intend to receive power. Only after successful authentication at multiple instances does the system proceed to regular power transmission, ensuring reliability while managing time through structured preliminary verification.
3Area of stationary object
If the power transmission range is extended to cover a wider area, then the detection capability is improved, but the probability of detecting passing objects that do not need power increases
Solution Approach 1:
The authentication unit receives feedback from multiple detection instances to determine whether an detected object is a legitimate power reception apparatus. By monitoring the object's presence across multiple predetermined intervals and requiring successful authentication at each instance, the system can distinguish between objects that intend to receive power and those that merely pass through the extended transmission area. This feedback mechanism enables the system to maintain a wide transmission area for detection purposes while preventing unnecessary power transmission to passing objects.
Data Source
AI summary
A power transmission apparatus includes a power transmission unit configured to wirelessly transmit power to a power reception apparatus, a detection unit configured to detect an object present in a range of the power transmission apparatus where the power is transmitted based on an intermittent power transmission, and an authentication unit configured to authenticate whether the object detected by the detection unit is the power reception apparatus that receives the power, wherein the authentication unit authenticates the object detected as being present in the range where the power is transmitted at each of a plurality of times of the power transmission for detection during a predetermined period, and wherein the power transmission unit transmits the power to the power reception apparatus that has been successfully authenticated.