Optical Power Feeding Beam Control for Radiation and Loss Reduction
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Solution Overview
Problem
Optical power feeding systems using optical fibers suffer from increased light loss and radiation risks due to the use of optical fibers, which cannot effectively suppress the influence of feed light radiation during spatial transmission.
Innovation Solution
An optical power feeding system that performs power feeding through spatial transmission using a light emitter and adjuster to variably adjust the beam diameter of feed light, with a powered device that converts the light into electric power and responds to the power sourcing equipment to optimize the beam diameter.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by moving object
If optical fiber is used for power transmission, then power feeding can be achieved, but light loss increases and radiation risks occur
Solution Approach 1:
The patent extracts the optical fiber from the system, transitioning from fiber-based power transmission to spatial transmission. This removes the source of light loss and radiation risks associated with optical fibers while maintaining the core function of wireless power feeding through free-space optical transmission
Solution Approach 2:
The patent introduces beam diameter adjustment as an intermediary control mechanism. By adjusting the beam diameter dynamically, the system optimizes power transmission efficiency in free space without requiring optical fibers, thus eliminating light loss and radiation issues while maintaining effective power delivery
2Object-affected harmful factors
If beam diameter is decreased to reduce radiation influence, then safety improves, but power transmission efficiency may deteriorate
Solution Approach 1:
The patent applies dynamic adjustment of beam diameter based on operational conditions. The system dynamically optimizes the beam diameter to maintain appropriate power density at the receiver while minimizing radiation exposure to surrounding areas, balancing safety and transmission efficiency through real-time control
Solution Approach 2:
The patent changes the beam diameter parameter adaptively. By adjusting this physical parameter, the system achieves optimal power transmission efficiency while controlling the spread of radiation, thus resolving the contradiction between safety and efficiency through parameter optimization
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
Reduces light loss and radiation risks by optimizing the beam diameter, maintaining high optical power feeding efficiency and minimizing damage to foreign objects, while reducing the need for additional detection devices and components.
Implementation Method 1
electric power is converted into light (called feed light), the feed light is transmitted
Implementation Method 2
the feed light is transmitted and is converted into electric energy
Data Source
AI summary
To suppress an influence of radiation of feed light subjected to spatial transmission, an optical power feeding system 1B performs power feeding from PSE 110B to a PD 310B by spatial transmission of feed light 112. The PSE 110B includes a light emitter 111 and an adjuster 150B. The light emitter 111 outputs the feed light 112. The adjuster 150B variably adjusts a beam diameter of the feed light 112. The PD 310B includes a light receiver 311 and a responder 350B. The light receiver 311 converts the feed light 112 that has been received into electric power. The responder 350B makes a response to the PSE 110B in accordance with whether the beam diameter of the feed light 112 is appropriate. The adjuster 150B gradually decreases the beam diameter from a beam diameter at a start of outputting of the feed light 112, and stops decreasing the beam diameter, based on the response.