Wireless Laser Power Transmission with Foreign Object Detection
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Solution Overview
Problem
Current wireless power transmission technologies face challenges in minimizing human health risks due to light exposure during laser-based transmission and require complex configurations that increase the load and cost of wireless power reception apparatuses, necessitating communication between transmission and reception units.
Innovation Solution
A wireless power transmission apparatus that includes a laser light source, an FO detection unit using secondary light, and a control unit to prevent laser light exposure to living things by detecting foreign objects and adjusting the output accordingly, while eliminating the need for communication between the transmission and reception units.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Power
If laser-based wireless power transmission is used, then transmission distance and power delivery capability are improved, but human health risks due to light exposure increase
Solution Approach 1:
The system performs preliminary detection of the transmission path using secondary light before activating the main laser light source. The FO detection unit scans the path and only allows power transmission when no foreign objects are detected, preventing harmful laser exposure while maintaining power delivery capability
Solution Approach 2:
Secondary light is used as an intermediary to detect the transmission path and foreign objects. This separate detection mechanism allows the system to verify path safety without using the high-power laser itself, enabling safe operation when the path is clear
2Reliability
If communication protocols are implemented between transmission and reception units, then power transmission reliability is improved, but device complexity and cost increase
Solution Approach 1:
The wireless power transmission system operates autonomously without requiring communication protocols between transmission and reception units. The transmission unit independently manages power delivery based on pre-validated path safety, eliminating the need for complex bidirectional communication infrastructure
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 solution effectively minimizes health risks from light exposure and reduces the load and cost of wireless power reception apparatuses by simplifying configurations and eliminating the need for communication between units during transmission.
Implementation Method 1
a laser light source unit, that is, a laser light source configured to generate laser light for wireless charging
Implementation Method 2
an FO detection unit configured to detect an FO using secondary light
Data Source
AI summary
Disclosed in the present specification are a wireless power transmission apparatus, and a method therefor. The wireless power transmission apparatus (Tx) according to one embodiment of the present invention comprises: a laser light source unit; a light output unit for outputting, for wireless charging, laser light generated by the laser light source unit to a light receiving unit of a wireless power receiving apparatus; a foreign object (FO) sensing unit for sensing an FO by utilizing supplementary light; and a control unit for controlling the laser light output when an FO is sensed by the FO sensing unit.