UAV Optical Tracking Recapture via Lost Signal Return
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Solution Overview
Problem
Existing techniques for optically tracking unmanned aerial vehicles (UAVs) face challenges in recapturing them after a sudden change in location due to wind or obstacles, as the total station (TS) may lose sight of the UAV, and the searching function is not satisfactory for three-dimensional movement.
Innovation Solution
A control device that transmits a lost signal to the UAV when it is lost, causing it to return to a previously captured location and hover, while the TS searches the corresponding airspace to recapture it, thereby increasing the chances of successful reacquisition.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the total station uses its searching function to recapture the UAV after losing sight, then the UAV may be recaptured, but the searching function is not satisfactory for three-dimensional movement and recapture efficiency is low
Solution Approach 1:
The system performs preliminary actions by having the UAV return to a previously captured location and hover before the actual recapture occurs. The control device calculates the last known position of the UAV and directs it to return there, preparing the UAV in a predictable location for subsequent recapture by the total station, thereby improving recapture efficiency in three-dimensional space
Solution Approach 2:
The system implements feedback by continuously monitoring the UAV's capture status and automatically initiating the return-to-position procedure when capture is lost. The control device receives feedback about capture loss and responds by calculating the last known position and directing the UAV to return there, creating a closed-loop system that improves recapture reliability
2Adaptability or versatility
If the UAV moves suddenly due to wind or obstacles, then the UAV may change location rapidly, but the total station loses sight of the UAV
Solution Approach 1:
The system prepares for potential tracking loss by maintaining records of the UAV's last known position and automatically initiating a return-to-position procedure when tracking is lost. This preliminary preparation enables rapid recovery after sudden movements caused by wind or obstacles, improving tracking continuity
Solution Approach 2:
The system applies preliminary anti-action by having the UAV return to its last known position when tracking is lost, counteracting the effect of sudden movements caused by wind or obstacles. This preemptive recovery action improves the reliability of continuous tracking by rapidly restoring the UAV to a trackable state
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
Facilitates easy recapture of the UAV by narrowing down the search area to the location where it was previously captured, improving the probability of reacquiring the UAV.
Implementation Method 1
a laser distance measuring function
Implementation Method 2
The UAV has a reflective prism that reflects the laser light for searching, back in the incident direction, and the TS detects light reflected from the reflective prism
Data Source
AI summary
A technique enables easy recapture of an unmanned aerial vehicle (UAV) that an optical device has lost sight of. A control device controls tracking of the unmanned aerial vehicle. When failing to capture the unmanned aerial vehicle during tracking of the unmanned aerial vehicle, the control device controls processing to transmit a lost signal and controls processing to search for the unmanned aerial vehicle by targeting an airspace containing a location at which the unmanned aerial vehicle was previously captured by the control device.