UAV Cargo Winding With Fall Prevention for Load Disconnection
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Solution Overview
Problem
Existing unmanned aerial vehicles equipped with winding machines for cargo delivery face issues where the cargo may sway due to wind or experience unexpectedly large loads, leading to a risk of the linear member severing or disconnecting from the delivery target during flight.
Innovation Solution
Incorporating a fall prevention mechanism into the aerial vehicle that can hold the delivery target disconnected from the linear member, combined with a control system to manage the winding machine and fall prevention mechanism, ensuring the delivery target is securely held and prevented from falling.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If the delivery target is held by a single linear member during flight, then the device complexity is reduced, but the reliability of cargo retention deteriorates due to risk of severing or disconnection
Solution Approach 1:
The cargo retention system is segmented into multiple independent components: the linear member for primary suspension and the fall prevention mechanism as a secondary safety system. This segmentation allows the system to maintain simplicity while adding reliability through functional separation.
Solution Approach 2:
The fall prevention mechanism implements beforehand cushioning by providing a pre-positioned safety net that activates only if the linear member fails. This prior preparation ensures cargo protection without interfering with normal operation, resolving the contradiction between simplicity and reliability.
2Reliability
If the fall prevention mechanism is activated to hold the delivery target, then the reliability of cargo retention is improved, but the device complexity increases
Solution Approach 1:
The fall prevention mechanism is designed as a separable, extractable component that can be independently added to the basic drone structure. This extraction approach allows the reliability improvement to be achieved without fundamentally redesigning the entire system, minimizing the increase in overall complexity.
Solution Approach 2:
The fall prevention mechanism serves as a dedicated safety subsystem that operates independently from the primary suspension system. By isolating this function into a separate mechanism, the complexity increase is contained to a specific module rather than propagating throughout the entire system.
3Ease of operation
If the linear member is used to suspend the delivery target during flight, then the ease of operation is improved, but the stability of cargo position deteriorates due to swaying from wind effects
Solution Approach 1:
The fall prevention mechanism acts as a counterbalancing system that provides opposing support force to counteract the swaying motion caused by wind. This anti-action stabilizes the cargo position while maintaining the simplicity of the linear member suspension system.
Solution Approach 2:
The fall prevention mechanism provides beforehand cushioning against positional instability by being pre-positioned to catch and stabilize the cargo if excessive swaying occurs. This prevents cargo loss while maintaining ease of operation during normal flight conditions.
Data Source
AI summary
An unmanned aerial vehicle according to an aspect of the present invention includes: an aerial vehicle body capable of flying; a winding machine provided to the aerial vehicle body and capable of winding and unwinding a linear member an end of which is connectable to a delivery target; and a fall prevention mechanism provided to the aerial vehicle body and capable of holding the delivery target disconnected from the linear member.