UAV Payload Release Tracking With Image-Based Path Correction
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Solution Overview
Problem
Current unmanned aerial vehicles (UAVs) lack an efficient mechanism for accurately delivering payloads to specific locations on the ground while hovering, as they struggle with real-time path adjustments and precise positioning during descent.
Innovation Solution
A retractable payload delivery system equipped with a tether, imaging system, and control system that uses image tracking to determine the position of a payload delivery device suspended from the UAV, allowing for real-time adjustments to ensure accurate delivery by compensating for deviations from the planned path.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a retractable payload delivery system is used to lower payloads to the ground, then payload delivery capability is improved, but real-time position tracking accuracy deteriorates without image tracking
Solution Approach 1:
A light source is introduced as an intermediary element attached to the delivery device. This light source emits visible light that serves as a reference marker for the imaging system, enabling precise position tracking of the delivery device during payload lowering operations without requiring complex sensors on the delivery device itself
Solution Approach 2:
The patent replaces complex mechanical position sensing systems on the delivery device with an optical tracking system. Instead of using mechanical encoders, potentiometers, or inertial sensors on the delivery device, the system uses an imaging system on the UAV to optically track the light source, substituting mechanical measurement with optical measurement
2Measurement precision
If image tracking is implemented to track the delivery device position, then position tracking accuracy is improved, but system complexity increases
Solution Approach 1:
The tracking system is segmented into two independent parts: a simple light source attached to the delivery device and an imaging system on the UAV. This segmentation allows the delivery device to remain simple while the tracking capability is provided by the UAV's imaging system, reducing overall system complexity
Solution Approach 2:
The system creates an optical copy (image) of the delivery device's position by capturing the light source in the imaging system. This optical copy provides position information without requiring physical sensors on the delivery device, simplifying the delivery device while maintaining tracking accuracy
3Manufacturing precision
If real-time path adjustments are made to compensate for deviations, then delivery accuracy is improved, but control system complexity increases
Solution Approach 1:
The system implements feedback control by continuously monitoring the delivery device's position through image tracking and comparing it with the planned path. The control system automatically generates corrective commands to adjust the delivery device's position, providing real-time path compensation without requiring complex manual intervention
Solution Approach 2:
The control system performs self-service by automatically detecting path deviations through image tracking and generating corrective control commands without external intervention. The system monitors its own delivery operation and autonomously adjusts the delivery device's position to maintain accurate delivery
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 precise and accurate delivery of payloads to the intended location by utilizing image tracking and real-time path adjustments, ensuring reliable and controlled release of the payload on the ground.
Implementation Method 1
a field of view of the imaging system includes a light source that is situated on the delivery device and that is arranged to emit light toward the UAV
Data Source
AI summary
An unmanned aerial vehicle (UAV) is disclosed that includes a retractable payload delivery system. The payload delivery system can lower a payload to the ground using a delivery device that secures the payload during descent and releases the payload upon reaching the ground. The location of the delivery device can be determined as it is lowered to the ground using image tracking. The UAV can include an imaging system that captures image data of the suspended delivery device and identifies image coordinates of the delivery device, and the image coordinates can then be mapped to a location. The UAV may also be configured to account for any deviations from a planned path of descent in real time to effect accurate delivery locations of released payloads.