UAV Winch Payload Handling With Current-Based Attachment Detection
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Current unmanned aerial vehicles (UAVs) lack efficient systems for picking up and delivering payloads without the need for landing, and existing solutions often require infrastructure and have complexity due to moving parts in payload coupling mechanisms.
Innovation Solution
A winch-based system integrated with a UAV, utilizing a tether and payload coupling apparatus that includes a motor for winding and unwinding the tether, and a payload latch that automatically secures and releases the payload using a solid-state design with no moving parts, allowing for payload pickup and delivery without landing and minimizing infrastructure requirements.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a winch-based system with motor and spool is used for payload pickup and delivery, then payload delivery capability is improved, but device complexity increases due to moving parts
Solution Approach 1:
The patent replaces traditional mechanical payload coupling mechanisms with moving parts (hooks, latches, springs) with a solid-state magnetic coupling system. The payload coupling apparatus uses magnetic attraction forces to secure payloads without mechanical interlocking components, thereby reducing device complexity while maintaining payload delivery capability.
Solution Approach 2:
The patent extracts and removes the payload coupling apparatus from the UAV body, allowing it to be deployed and retracted as needed. This separation reduces the permanent complexity of the UAV structure while maintaining the capability for payload operations when required.
2Strength
If traditional payload coupling mechanisms with moving parts are used, then payload securing capability is improved, but reliability decreases due to more components that can fail
Solution Approach 1:
The patent substitutes mechanical coupling components (hooks, latches, springs, pins) with a magnetic field-based coupling system. The magnetic coupling apparatus uses electromagnetic forces to secure payloads, eliminating mechanical contact points that can wear, deform, or fail, thereby significantly improving system reliability while maintaining secure payload attachment.
Solution Approach 2:
The magnetic coupling system provides automatic engagement and disengagement of payloads through magnetic attraction and repulsion forces. The system self-regulates the coupling strength based on the proximity and alignment of the magnetic components, reducing the need for complex control mechanisms and improving reliability through inherent system stability.
3Reliability
If infrastructure-based payload systems are used, then payload delivery reliability is improved, but infrastructure requirements increase
Solution Approach 1:
The UAV's winch-based system with integrated payload coupling apparatus provides self-contained payload pickup and delivery capabilities. The system uses the UAV's own motor, spool, and magnetic coupling mechanisms to secure, transport, and release payloads without requiring external infrastructure such as landing pads, cranes, or specialized handling equipment, thereby enhancing adaptability to various delivery locations.
Solution Approach 2:
The patent employs a dynamic payload coupling system that can engage and disengage at various flight stages. The winch system can lower the payload coupling apparatus to pickup payloads in flight and later raise it to deliver payloads, providing flexible operation across different flight conditions and locations without fixed infrastructure requirements.
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
Enables efficient and reliable payload pickup and delivery without landing, reducing infrastructure needs and enhancing mission flexibility with a robust, low-maintenance system.
Implementation Method 1
a motor for winding and unwinding the tether from a spool
Implementation Method 2
operating the motor in a first mode and a second mode respectively counters and assists unwinding of the tether due to gravity
Data Source
AI summary
Described herein are methods and systems for picking up, transporting, and lowering a payload coupled to a tether of a winch system arranged on an unmanned aerial vehicle (UAV). For example, the winch system may include a motor for winding and unwinding the tether from a spool, and the UAV's control system may operate the motor to lower the tether toward the ground so a payload may be attached to the tether. The control system may monitor an electric current supplied to the motor to determine whether the payload has been attached to the tether. In another example, when lowering a payload, the control system may monitor the motor current to determine that the payload has reached the ground and responsively operate the motor to detach the payload from the tether. The control system may then monitor the motor current to determine whether the payload has detached from the tether.