UAV Chemical Plume Tracking With Upwind Source Localization
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Solution Overview
Problem
Current unmanned aerial vehicles (UAVs) are inefficient in detecting or releasing chemical agents due to size, speed, and payload constraints, and lack autonomy in tracking chemical plumes, necessitating the use of handheld devices that pose risks to personnel, especially in hostile environments.
Innovation Solution
A chemical sensing system integrated with a UAV, comprising a chemical sensor, wind sensor, and processor that navigates to a chemical plume source using upwind tracking, and optionally includes an imaging device and chemical discharge port for releasing agents, enabling autonomous detection and tracking of chemical plumes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If handheld devices are used for chemical detection, then detection capability is achieved, but personnel safety is compromised
Solution Approach 1:
The patent replaces handheld mechanical detection devices with an autonomous aerial vehicle system that integrates chemical sensors, wind sensors, GPS, and onboard processing. This substitution eliminates personnel exposure to hazardous chemical environments while maintaining detection capability through automated plume tracking and source localization algorithms
Solution Approach 2:
The aerial vehicle performs self-navigation and self-detection by autonomously tracking chemical plumes using onboard sensors and processing units. The system independently determines wind direction, calculates plume trajectories, and navigates to sources without human intervention, enabling safe remote operation
2Area of stationary object
If large fixed wing UAVs are used for chemical sensing, then detection coverage is improved, but speed and maneuverability deteriorate
Solution Approach 1:
The patent divides the detection task into multiple phases: initial area coverage by deploying multiple UAVs, followed by individual UAVs autonomously tracking specific plume segments. This segmentation allows the system to maintain both broad coverage capability and fast response speeds by distributing detection responsibilities across multiple smaller, more agile units
Solution Approach 2:
The system employs dynamic task allocation where UAVs can transition between coverage missions and tracking missions based on real-time plume detection. The aerial vehicles adjust their flight patterns, speed, and sensor orientation dynamically to optimize both coverage area and response speed according to environmental conditions
3Stability of the object's composition
If slow blimps are used for chemical detection, then stability is improved, but detection efficiency deteriorates
Solution Approach 1:
The patent replaces traditional stable but slow blimp platforms with modern autonomous aerial vehicles that use electronic stabilization, inertial measurement units, and active control systems. This substitution maintains platform stability through electronic means while achieving significantly higher detection efficiency through faster flight capabilities and automated navigation
4Reliability
If autonomous navigation is added to UAVs, then personnel safety is improved, but system complexity increases
Solution Approach 1:
The aerial vehicle integrates multiple functions into a single platform: chemical sensing, wind sensing, GPS navigation, onboard image processing, autonomous navigation, and communication. This multi-functionality reduces overall system complexity by eliminating the need for separate handheld devices, ground-based tracking systems, and manual coordination infrastructure
Solution Approach 2:
The patent combines previously separate systems (chemical detectors, navigation equipment, communication devices) into an integrated autonomous aerial platform. The onboard processor merges sensor data from multiple sources to perform simultaneous plume tracking, navigation, and source localization, reducing the complexity of coordinating separate systems
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 safe, autonomous detection and tracking of chemical agents, reducing risks to personnel and providing real-time data without the need for handheld devices, suitable for applications like arms verification and chemical spill investigations.
Implementation Method 1
a chemical sensor to provide chemical data reflecting one or more chemical agents in the air
Implementation Method 2
a wind sensor to provide wind data reflecting one or more wind directions or one or more wind speeds
Implementation Method 3
the processor is configured to identify a source location of the chemical plume through an upwind tracking process
Data Source
Figure 1a
Figure 1b~1c
Figure 2
AI summary
An aircraft (100), system (200), and method for sensing and/or releasing chemical agents by an aircraft (200) is disclosed. The aircraft (100), system (200), and method may employ a chemical sensor (150), a wind sensor (140), an imaging device (144) for capturing environmental features, and/or a processor (116) operably coupled therewith. The processor (116) may be used for collecting data from the chemical sensor (150), the wind sensor (140), and the imaging device (116) to identify a navigational waypoint and to provide commands to the chemical sensor (150) or to the aircraft (100) based at least in part on collected data.