UAV Microphone Positioning Arm for Low-Noise Sound Pickup
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Solution Overview
Problem
Unmanned aerial vehicles (UAVs) face a challenge in maintaining flight performance while ensuring the quality of sound pickup, as sound generated by the UAV, such as wind noise, interferes with microphone readings, and rearranging the microphone to avoid this noise compromises the UAV's balance.
Innovation Solution
The UAV incorporates a microphone and an actuator that can change position, with a processor obtaining positional relationship information to move the UAV to a predetermined position and extend the actuator towards the target, allowing the microphone to be positioned optimally for sound pickup while minimizing interference from UAV-generated noise.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the microphone is arranged away from the propeller to avoid wind noise, then the sound quality is improved, but the balance of the unmanned aerial vehicle deteriorates
Solution Approach 1:
The microphone is mounted on a movable arm that can dynamically adjust its position relative to the propeller. The arm can extend and retract, allowing the microphone to be positioned away from the propeller during operation to reduce wind noise, while being closers during storage to maintain balance. This dynamic positioning resolves the contradiction between sound quality and vehicle balance.
2Measurement precision
If the microphone is placed close to the target for better sound pickup, then the sound quality is improved, but the interference from UAV-generated noise increases
Solution Approach 1:
The microphone is positioned in a three-dimensional space away from the propeller plane by extending the arm laterally and vertically. This spatial separation in another dimension allows the microphone to be close to the target for good sound pickup while avoiding the direct path of propeller-generated wind noise, thus resolving the contradiction between sound quality and noise interference.
3Measurement precision
If a mechanism is added to position the microphone away from the propeller, then the sound quality is improved, but the device complexity increases
Solution Approach 1:
The microphone system is segmented from the main body of the UAV, mounted on a separate movable arm. This segmentation allows the microphone to be independently positioned away from the propeller without affecting the core UAV structure, improving sound quality while keeping the added mechanism relatively simple and modular.
Data Source
AI summary
Unmanned aerial vehicle includes a microphone which picks up a sound emitted by a target, an actuator which extends to change a position of the microphone, and a processor. The processor obtains positional relationship information which indicates at least one of a position of the target or a distance from the unmanned aerial vehicle to the target, causes the unmanned aerial vehicle to move to a first position at which the unmanned aerial vehicle and the target have a predetermined positional relationship based on the positional relationship information, and causes actuator to extend toward the target after unmanned aerial vehicle moves to the first position.