Drone Power Reception Antenna Layout for Low-Drag Wireless Flight
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Solution Overview
Problem
Drone batteries' capacity and weight are proportional, limiting continuous flight time, and existing power reception devices obstruct airflow, making it difficult to increase flight duration through conventional means.
Innovation Solution
A drone design with a larger power reception antenna area, positioned to minimize drag from descending airflow, combined with a wireless power transmission system that converts received radio waves into DC power for the electric motor, allowing extended flight times.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the power reception antenna area is increased to improve wireless power transmission efficiency, then the drag caused by descending airflow increases, but flight performance deteriorates
Solution Approach 1:
The power reception antenna is divided into multiple antenna elements arranged in a specific pattern, allowing the total effective area to be increased while maintaining individual element sizes that minimize drag impact on descending airflow
Solution Approach 2:
The antenna elements are arranged asymmetrically with different spacing configurations - tighter spacing in directions where drag is less critical and wider spacing in directions where airflow protection is more important, optimizing the balance between power reception area and airflow performance
2Duration of action of moving object
If the battery capacity is increased to extend continuous flight time, then the weight increases, but the electric power required for flight increases accordingly
Solution Approach 1:
Wireless power transmission is implemented to supply power to the drone during flight operations, eliminating the need for large onboard battery capacity and associated weight, thereby extending continuous flight time without increasing battery weight
Solution Approach 2:
The mechanical battery storage system is replaced with a wireless power transmission system that delivers power through electromagnetic fields, removing the weight constraint of physical battery storage while maintaining continuous power supply for extended flight operations
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 enables a drone with a larger power reception antenna area, reducing drag and increasing flight duration by efficiently using wireless power transmission to extend battery life and reduce weight, thereby enhancing continuous flight capabilities.
Implementation Method 1
a power reception antenna 2 including a power reception surface to receive a radio wave transmitting electric power
Implementation Method 2
a converter 15 to convert electric power of the radio wave received by the power reception antenna 2 into DC electric power
Implementation Method 3
a rotary blade 8 to generate lift by rotating
Implementation Method 4
a drag caused by a descending airflow generated by rotation of the rotary blade
Data Source
AI summary
A flying mobile body 4 includes: a rotary blade to rotate to generate lift; an airframe in which the rotary blade is provided; a power reception antenna to include a power reception surface that receives a radio wave transmitting electric power, the power reception surface having an area larger than an area projecting the airframe onto a rotation axis perpendicular plane that is a plane perpendicular to a rotation axis direction that is a direction parallel to a rotation axis of the rotary blade, and a drag reducing structure that reduces a drag generated with respect to a descending airflow generated by rotation of the rotary blade: a converter to convert electric power of the radio wave received by the power reception antenna into DC electric power; a storage battery; and an electric motor to generate power rotating the rotary blade.