UAV Spray Nozzle Orientation Control for Uniform Surface Coating
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Solution Overview
Problem
Existing fluid spraying systems, including unmanned aerial vehicles (UAVs), face challenges in maintaining precise orientation and position during spraying operations, particularly when applying fluid in orientations other than orthogonal to the surface, leading to potential overspray and uneven application.
Innovation Solution
The UAV system incorporates a control unit that manages flight and spraying operations, utilizing sensors and a force compensation routine to maintain the nozzle's orientation orthogonal to the surface, and includes a de-clog mechanism to ensure continuous and high-quality fluid application.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the UAV applies fluid in orientations other than orthogonal to the surface, then accessibility to difficult-to-reach areas is improved, but orientation precision and application quality deteriorate
Solution Approach 1:
The spray nozzle is made dynamically adjustable through an orientation control system that allows real-time changes in spray angle and direction. The system includes actuators and control mechanisms that enable the nozzle to adapt its orientation dynamically during flight, transitioning from fixed orthogonal positioning to variable angular positioning while maintaining precision through active control.
Solution Approach 2:
An orientation sensing system provides continuous feedback to the control unit about the actual nozzle angle and position. This feedback loop enables the control system to make real-time adjustments to maintain precise orientation control even when operating in non-orthogonal positions, resolving the contradiction between spray orientation flexibility and nozzle orientation precision.
2Productivity
If the UAV operates autonomously with pre-programmed flight paths, then operational efficiency is improved, but responsiveness to unexpected movements deteriorates
Solution Approach 1:
The UAV incorporates autonomous self-correction capabilities through onboard sensors and control systems that automatically detect and compensate for unexpected movements or deviations from the pre-programmed flight path. The system performs self-diagnosis and self-adjustment without external intervention, maintaining position stability while preserving operational efficiency.
Solution Approach 2:
Real-time position monitoring and feedback control systems continuously compare actual UAV position with the pre-programmed flight path, automatically initiating corrective maneuvers when deviations are detected. This closed-loop control maintains reliability and position stability while the UAV operates autonomously on efficient pre-programmed routes.
3Manufacturing precision
If the spray fan is oriented orthogonal to the sweep direction, then application quality is improved, but adaptability to complex surface geometries deteriorates
Solution Approach 1:
The spray system employs dynamically adjustable nozzle assemblies that can change orientation in real-time during operation. The nozzles can pivot and rotate to maintain optimal spray patterns on surfaces with varying geometries, allowing the system to preserve high application quality while adapting to complex surface configurations that require non-orthogonal spray angles.
Solution Approach 2:
Different portions of the spray system can be independently oriented to match local surface characteristics. The system applies local quality control by adjusting spray angle and direction based on the specific geometric features of the surface being treated, maintaining high application quality on each local area while accommodating overall surface complexity.
Data Source
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AI summary
An unmanned aerial vehicle (UAV) includes a sprayer configured to generate a pressurized fluid flow and a nozzle configured to receive the pressurized fluid from the sprayer and to generate a spray fan to apply the fluid to a surface. The UAV includes sensors and a control unit to control both flight of the UAV and spraying by the sprayer. The fluid can be stored onboard the UAV in a reservoir or can be remotely stored and pumped to the UAV. The UAV control unit can be preloaded with a spray plan and a flight plan, or the UAV can be controlled by a user.