Magnetic Coupling for UAV Payload Snag Release
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Multirotor UAVs face the risk of crashing or being irretrievably lost when their payload or suspension becomes caught or snagged on immovable objects due to their inability to intervene and lack of situational awareness, leading to potential hazards and accidents.
Innovation Solution
Equipping multirotor UAVs with a reliable and inexpensive magnetic or mechanical coupling system that allows for the automatic release of the payload or its suspension when caught, ensuring the UAV can fly away safely by maintaining aerodynamic stability, using a coupling with a holding force between the UAV and payload that is greater than the payload's weight but less than the UAV's maximal lift.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a strong coupling mechanism is used to securely attach the payload to the UAV, then the payload can be reliably carried, but the UAV cannot separate when snagged and may crash or be lost
Solution Approach 1:
The coupling mechanism transitions from a static, fixed-strength connection to a dynamic, variable-strength connection. The magnetic coupling strength can be adjusted based on operational conditions, allowing strong attachment during normal flight and automatic separation when snagged, thus resolving the contradiction between reliable attachment and crash prevention.
Solution Approach 2:
The magnetic field strength parameter of the coupling mechanism is made variable rather than fixed. By controlling the magnetic field strength, the system can maintain strong attachment during normal operation and automatically separate when the payload becomes snagged, eliminating the need for manual intervention and preventing UAV crash.
2Object-affected harmful factors
If a manual release mechanism is implemented, then the UAV can be freed from snagged payloads, but the system complexity increases and requires additional control systems
Solution Approach 1:
The coupling mechanism automatically separates when the payload becomes snagged without requiring manual intervention or complex control systems. The magnetic coupling naturally loses attachment when the payload is caught on an obstacle, enabling self-service release and reducing system complexity while preventing UAV crash.
Solution Approach 2:
The manual mechanical release mechanism is replaced with an automatic magnetic coupling system. The magnetic field-based attachment and separation eliminates the need for complex mechanical release mechanisms, reducing device complexity while maintaining the ability to free the UAV from snagged payloads.
3Reliability
If the coupling holding force is increased to prevent payload detachment, then payload security improves, but the UAV cannot separate when snagged and lift is applied
Solution Approach 1:
The coupling holding force is made dynamic rather than static. The magnetic coupling strength adapts to operational conditions, providing strong attachment during normal flight and automatic separation when lift is applied during snagging, thus resolving the contradiction between payload security and separation capability.
Solution Approach 2:
The magnetic field strength parameter is made variable to balance payload security and separation capability. The system can maintain strong coupling during normal operation and automatically reduce coupling strength when snagged, enabling both secure payload attachment and timely separation without manual intervention.
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 the UAV to safely separate from the payload or its suspension when snagged, preventing crashes and loss, while being power-independent and weight-efficient, making it suitable for consumer and light-duty applications, including indoor and outdoor use in dense environments.
Implementation Method 1
The two coupling parts are releasably attached by a magnetic force between them that is selected to be more than the weight of the payload but less than maximal net lift of the UAV
Data Source
AI summary
Embodiments described herein relate to arrangements in which unmanned aerial vehicle (UAVs) are adapted to retrieve or carry a payload without becoming caught or snagged, e.g., on a tree or building. Such arrangements may help to prevent accidents or loss of the UAV.